LAVUELIB(1)

NAME
lavuelib - lavuelib Documentation

Authors: Christoph Rosemann <christoph.rosemann at desy.de>, Jan Kotański <jan.kotanski at desy.de>, André Rothkirch <andre.rothkirch at desy.de>

INTRODUCTION

This is a simple implementation of a live viewer front end. It is supposed to show a live image view from xray-detectors at PETRA3 @ desy.de, e.g. Pilatus, Lambda, Eiger, PerkinElmer, PCO, LimaCCD, and others. [image]

INSTALLATION

LaVue requires the following python packages: qt4 pyqtgraph numpy zmq scipy

It is also recommended to install: pytango hidra pil fabio requests h5py pni nxstools

  From sources

Download the latest LaVue version from https://github.com/jkotan/lavue

Extract sources and run

$ python setup.py install

The setup.py script may need: setuptools sphinx numpy pytest python packages as well as libqt4-dev-bin.

  Debian packages

Debian stretch (and jessie) ot Ubuntu bionic packages can be found in the HDRI repository.

To install the debian packages, add the PGP repository key

$ sudo su
$ wget -q -O - http://repos.pni-hdri.de/debian_repo.pub.gpg | apt-key add -

and then download the corresponding source list, e.g.

$ cd /etc/apt/sources.list.d

and

$ wget http://repos.pni-hdri.de/stretch-pni-hdri.list

or

$ wget http://repos.pni-hdri.de/jessie-pni-hdri.list

or

$ wget http://repos.pni-hdri.de/bionic-pni-hdri.list

respectively.

Finally,

$ apt-get update
$ apt-get install python-lavue

for python 2.7 version

$ apt-get update
$ apt-get install python3-lavue

for python 3 version. Please notice that HiDRA is not available for python 3 yet.

  From pip

To install it from pip you need to install pyqt5 in advance, e.g.

$ python3 -m venv myvenv
$ . myvenv/bin/activate
$ pip install pyqt5
$ pip install lavue

Moreover it is also good to install the following python packages:

$ pip install fabio
$ pip install pillow
$ pip install lavuefilters
$ pip install pytango

START THE VIEWER

To start LaVue

$ lavue

for python 2.7 or

$ lavue3

for python 3.

  Start the Viewer in the expert mode

Changing LaVue settings is available in the expert mode, i.e.

$ lavue -m expert

under an additional button: Configuration.

  Launching options

To get all possible command-line parameters

$ lavue -h

FURTHER READING

More information can be found at: LaVue

LAVUELIB PACKAGE

  Subpackages

  lavuelib.qrc package

  Module contents

  lavuelib.plugins package

  lavuelib.plugins.filters module

set of image sources

class lavuelib.plugins.filters.HGap(configuration=None)
    Bases: object

    Horizontal gap filter

    constructor

Parameters
    configuration (str) – JSON list with horizontal gap pixels to add

class lavuelib.plugins.filters.VGap(configuration=None)
    Bases: object

    Vertical gap filter

    constructor

Parameters
    configuration (str) – JSON list with vertical gap pixels to add

lavuelib.plugins.filters.rot45(image, imagename, metadata, imagewg)
    rotate image by 45 deg

Parameters

•   image (numpy.ndarray) – numpy array with an image

•   imagename (str) – image name

•   metadata (str) – JSON dictionary with metadata

•   imagewg (lavuelib.imageWidget.ImageWidget) – image wigdet

Returns
    numpy array with an image

Return type
    numpy.ndarray or None

  Submodules

  lavuelib.axesDialog module

detector axis widget

class lavuelib.axesDialog.AxesDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    detector axis widget class

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

createGUI()
    create GUI

xposition = None
    (float) x-coordinates of the first pixel

xscale = None
    (float) x-scale of pixels

xtext = None
    (str) text of x-axis

xunits = None
    (str) units of x-axis

yposition = None
    (float) y-coordinates of the first pixel

yscale = None
    (float) y-scale of pixels

ytext = None
    (str) text of y-axis

yunits = None
    (str) units of y-axis

  lavuelib.bkgSubtractionWidget module

background subtreaction widget

class lavuelib.bkgSubtractionWidget.BkgSubtractionWidget(parent=None, settings=None)
    Bases: PyQt5.QtWidgets.QWidget

    Define bkg image and subtract from displayed image.

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   settings (lavuelib.settings.Settings) – lavue configuration settings

applyStateChanged
    (pyqtgraph.QtCore.pyqtSignal) apply state change signal

bkgFileSelected
    (pyqtgraph.QtCore.pyqtSignal) bkg file selected signal

checkBkgSubtraction(state)
    unchecks apply CheckBox if state is 1 and it is checked and reset the display

Parameters
    state (int) – checkbox state

isBkgSubApplied()
    if background subtraction applied :returns: apply status :rtype: bool

setBackground(fname)
    sets the image background

Parameters
    fname (str) – file name

setDisplayedName(name)
    sets displayed file name

Parameters
    name (str) – file name

useCurrentImageAsBkg
    (pyqtgraph.QtCore.pyqtSignal) use current image signal

  lavuelib.channelGroupBox module

level widget

class lavuelib.channelGroupBox.ChannelGroupBox(parent=None, settings=None, expertmode=False)
    Bases: PyQt5.QtWidgets.QWidget

    Set minimum and maximum displayed values and its color.

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   settings (lavuelib.settings.Settings) – lavue configuration settings

•   expertmode (bool) – expert mode flag

changeView(showhistogram=None, showlevels=None, showadd=None)
    shows or hides the histogram widget

Parameters

•   showhistogram (bool) – if histogram should be shown

•   showlevels (bool) – if levels should be shown

•   showadd (bool) – if additional histogram should be shown

channelChanged
    (pyqtgraph.QtCore.pyqtSignal) color channel changed signal

colorChannel()
    provides color channel

Returns
    color channel

Return type
    int

rgbChanged
    (pyqtgraph.QtCore.pyqtSignal) rgb color channel changed signal

rgbchannels()

setChannel(channel, force=False)
    sets color channel

Parameters

•   channel (int) – color channel

•   force (bool) – force change

setChannelItemText(iid, text)
    sets channel item text

Parameters

•   iid (str) – label id

•   iid – label text

setDefaultColorChannel(channel)
    sets default color channel

Parameters
    channel (int or int) – default color channel(s)

setNumberOfChannels(number)
    sets maximum number of color channel

Parameters
    number (int) – number of color channel

showGradient(status=True)
    resets color channel

Parameters
    status (bool) – show gradient flag

updateBChannel()
    update blue channel

updateChannelLabels(chlabels)
    update red channel

Parameters
    chlabels (dict <int str>) – dictionary with channel labels

updateGChannel()
    update green channel

updateRChannel()
    update red channel

  lavuelib.configDialog module

configuration widget

class lavuelib.configDialog.ConfigDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

addrois = None
    (bool) add rois enabled

aspectlocked = None
    (bool) aspect ratio locked

autodownsample = None
    (bool) auto down sample

autozmqtopics = None
    (bool) topics for ZMQ stream source fetched from the stream

availimagesources = None
    (str) list with available image source widget names

availtoolwidgets = None
    (str) list with available tool widget names

calcvariance = None
    (bool) calculate variance

createGUI()
    create GUI

defdetservers = None
    (bool) use default detector servers

detservers = None
    (str) json hidra detector server list

door = None
    (str) device name of sardana door

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

filters = None
    (str) json list with filters

geometryfromsource = None
    (bool) fetch geometry from source

hidraport = None
    (str) hidra data port

imagesources = None
    (str) json list with image source widget names

interruptonerror = None
    (bool) interrupt on error

keepcoords = None
    (bool) keep original coordinates

lazyimageslider = None
    (bool) lazy image slider

maxmbuffersize = None
    (int) maximal number of images in memory buffer

nxslast = None
    (bool) nexus file source starts from the last image

nxsopen = None
    (bool) nexus file source keeps the file open

orderrois = None
    (bool) fetch rois order enabled

refreshrate = None
    (float) refresh rate

roiscolors = None
    (str) json list with rois colors

sardana = None
    (bool) sardana enabled

secautoport = None
    (bool) find security stream port automatically

secport = None
    (str) security stream port

secstream = None
    (bool) security stream enabled

sendrois = None
    (bool) send rois to LavueController flag

showaddhisto = None
    (bool) show color distribution additional histogram widget

showallrois = None
    (bool) show all rois flag

showfilters = None
    (bool) show filter widget

showframerate = None
    (bool) show frame rate widget

showhighvaluemask = None
    (bool) show high value mask widget

showhisto = None
    (bool) show color distribution histogram widget

showlevels = None
    (bool) show intensity levels widget

showmask = None
    (bool) show mask widget

showmbuffer = None
    (bool) show memory buffer widget

showscale = None
    (bool) show intensity scale widget

showstats = None
    (bool) show statistics widget

showsub = None
    (bool) show bakcground subtraction widget

showtrans = None
    (bool) show transformation widget

sourcedisplay = None
    (bool) store display parameters for specific sources

statswoscaling = None
    (bool) statistics without intensity scaling

storegeometry = None
    (bool) store detector geometry

timeout = None
    (int) image source timeout in ms

toolrefreshtime = None
    (float) tool refresh rate time is s

toolwidgets = None
    (str) json list with tool widget names

zeromask = None
    (bool) zero mask enabled

zmqtopics = None
    (list < str>) list of topics for ZMQ stream source

class lavuelib.configDialog.TableWidgetDragCheckBoxes(parent)
    Bases: PyQt5.QtWidgets.QTableWidget

    TableWidget with drag and drop checkboxes

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

create(selected, available, itemnames=None)
    populates table

Parameters

•   selected (list < str>) – all selected aliases

•   available (list < str>) – all available aliases

•   itemnames (dict < str, str>) – dictionary of alias names

dropEvent(event)
    replaces rows in the table

Parameters
    event (pyqtgraph.QtCore.QEvent:) – drop event

getChecks(available)
    update checks in checkboxdata

Parameters
    available (list < str>) – all available aliases

Returns
    all selected aliases

Return type
    list < str>

  lavuelib.controllerClient module

tango lavue controller client

class lavuelib.controllerClient.ControllerClient(device)
    Bases: PyQt5.QtCore.QObject

    lavue controller client

    constructor

Parameters
    device (str) – tango device name

beamCenterXChanged
    (pyqtgraph.QtCore.pyqtSignal) beam Center X changed signal

beamCenterYChanged
    (pyqtgraph.QtCore.pyqtSignal) beam Center Y changed signal

detectorDistanceChanged
    (pyqtgraph.QtCore.pyqtSignal) detector distance changed signal

detectorROIsChanged
    (pyqtgraph.QtCore.pyqtSignal) detector ROIs changed signal

energyChanged
    (pyqtgraph.QtCore.pyqtSignal) energy changed signal

lavueStateChanged
    (pyqtgraph.QtCore.pyqtSignal) lavueState changed signal

subscribe()
    subscribe callback methods

unsubscribe()
    unsubscribe callback methods

writeAttribute(name, value)
    writes attribute value of device

Parameters

•   name (str) – attribute name

•   value (any) – attribute value

class lavuelib.controllerClient.TangoCB(client, name, signal)
    Bases: object

    tango attribute callback class

    constructor

Parameters

•   client (str) – tango controller client

•   name (str) – attribute name

•   signal (pyqtgraph.QtCore.pyqtSignal) – signal to emit

push_event(*args, **kwargs)
    callback method receiving the event

  lavuelib.dataFetchThread module

data fetch thread

class lavuelib.dataFetchThread.DataFetchThread(datasource, alist)
    Bases: PyQt5.QtCore.QThread

    constructor

Parameters

•   datasource (lavuelib.imageSource.BaseSource) – image source

•   alist (ExchangeList) – exchange object

changeStatus(status)
    change connection status

Parameters
    status (bool) – connection status

isRunning()
    is datasource source connected

Returns
    if datasource source connected

Return type
    bool

newDataNameFetched
    (pyqtgraph.QtCore.pyqtSignal) new data name signal

ready()
    continue acquisition

run()
    runner of the fetching thread

setDataSource(datasource)
    sets datasource :param datasource: datasource object :type datasource: lavuelib.imageSource.BaseSource

stop()
    stop the thread

class lavuelib.dataFetchThread.ExchangeList
    Bases: object

    subclass for data caching

    constructor

addData(name, data, metadata=u'')
    write data into exchange object

Parameters

•   name (str) – image name

•   data (numpy.ndarray) – image data

•   metadata (str) – json dictionary with image metadata

readData()
    write data into exchange object

Returns
    tuple of exchange object (name, data, metadata)

Return type
    list <str, numpy.ndarray, str >

lavuelib.dataFetchThread.GLOBALREFRESHRATE = 0.1
    (float) refresh rate in seconds

  lavuelib.displayExtensions module

image display widget

class lavuelib.displayExtensions.CenterExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

mouse_doubleclick(x, y, locked)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

•   locked (bool) – double click lock

mouse_position(x, y)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

name = None
    (str) tool name

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes Center lines

updateCenter(xdata, ydata)
    updates the image center

Parameters

•   xdata (float) – x pixel position

•   ydata (float) – y-pixel position

class lavuelib.displayExtensions.CutExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

changeCutRegion(_=None)
    changes the current roi region

currentCut()
    provides current cut id

Returns
    cut id

Return type
    int

cutCoords()
    provides cuts coordinates

Returns
    cuts coordinates

Return type
    list < [float, float, float, float] >

cutCoordsChanged
    (pyqtgraph.QtCore.pyqtSignal) cut coordinate changed signal

cutData(cid=None)
    provides the current cut data

Parameters
    cid (int) – cut id

Returns
    current cut data

Return type
    numpy.ndarray

isCutsEnabled()
    provides flag cuts enabled

Returns
    cut enabled flag

Return type
    bool

name = None
    (str) tool name

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes Cuts

updateCuts(cid, coords)
    update Cuts

Parameters

•   cid (int) – cut id

•   coords (list < [float, float, float, float] >) – cut coordinates

class lavuelib.displayExtensions.DisplayExtension(parent=None)
    Bases: PyQt5.QtCore.QObject

    display extension for ImageDisplayWidget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

coordinates()
    returns coordinates

enabled()
    is extension enabled

Returns
    is extension enabled

Return type
    bool

mouse_click(x, y)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

mouse_doubleclick(x, y, locked)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

•   locked (bool) – double click lock

mouse_position(x, y)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

name = None
    (str) extension name

refreshTime()
    provides refresh time

Returns
    refresh time in seconds

Return type
    float

scalingLabel()
    provides scaling label

Returns
    scaling label

Return type
    str

setRefreshTime(refreshtime)
    sets refresh time

Parameters
    refreshtime (float) – refresh time in seconds

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes subwidget

class lavuelib.displayExtensions.HandleWithSignals(pos, center, parent)
    Bases: pyqtgraph.graphicsItems.ROI.Handle

    handle with signals

    constructor

Parameters

•   pos ([float, float]) – position of handle

•   center ([float, float]) – center of handle

•   parent (pyqtgraph.graphicsItems.ROI.ROI) – roi object

hoverEvent(ev)
    hover event

Parameters
    ev (pyqtgraph.QtCore.QEvent:) – close event

hovered
    (pyqtgraph.QtCore.pyqtSignal) hover event emitted

class lavuelib.displayExtensions.LockerExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

coordinates()
    returns coordinates

mouse_doubleclick(x, y, locked)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

•   locked (bool) – double click lock

mouse_position(x, y)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

name = None
    (str) tool name

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes locker lines

updateLocker(xdata, ydata)
    updates the locker position

Parameters

•   xdata (float) – x pixel position

•   ydata (float) – y-pixel position

class lavuelib.displayExtensions.MarkExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

mouse_doubleclick(x, y, locked)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

•   locked (bool) – double click lock

mouse_position(x, y)
    sets vLine and hLine positions

Parameters

•   x (float) – x coordinate

•   y (float) – y coordinate

name = None
    (str) tool name

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes Mark Position lines

updatePositionMark(xdata, ydata)
    updates the position mark

Parameters

•   xdata (float) – x pixel position

•   ydata (float) – y-pixel position

class lavuelib.displayExtensions.MaximaExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

name = None
    (str) tool name

setMaximaPos(positionlist)
    sets maxima postions

Parameters
    positionlist (list < (float, float) >) – [(x1, y1), … , (xn, yn)]

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes maxima

class lavuelib.displayExtensions.MeshExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

changeROIRegion(_=None)
    changes the current roi region

currentROI()
    provides current roi id

Returns
    roi id

Return type
    int

isROIsEnabled()
    provides flag rois enabled

Returns
    roi enabled flag

Return type
    bool

name = None
    (str) tool name

roiCoords()
    provides rois coordinates

Returns
    rois coordinates

Return type
    list < [float, float, float, float] >

roiCoordsChanged
    (pyqtgraph.QtCore.pyqtSignal) roi coordinate changed signal

scalingLabel()
    provides scaling label

Returns
    scaling label

Return type
    str

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes ROIs

updateROIs(rid, coords)
    update ROIs

Parameters

•   rid (int) – roi id

•   coords (list < [float, float, float, float] >) – roi coordinates

class lavuelib.displayExtensions.ROIExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

calcROIsum()
    calculates the current roi sum

Returns
    sum roi value, roi id

Return type
    (float, int)

calcROIsums()
    calculates all roi sums

Returns
    sum roi value, roi id

Return type
    :obj:list < float >

changeROIRegion(_=None)
    changes the current roi region

currentROI()
    provides current roi id

Returns
    roi id

Return type
    int

isROIsEnabled()
    provides flag rois enabled

Returns
    roi enabled flag

Return type
    bool

name = None
    (str) tool name

roiCoords()
    provides rois coordinates

Returns
    rois coordinates

Return type
    list < [float, float, float, float] >

roiCoordsChanged
    (pyqtgraph.QtCore.pyqtSignal) roi coordinate changed signal

scalingLabel()
    provides scaling label

Returns
    scaling label

Return type
    str

setROIsColors(colors=None)
    sets statistics without scaling flag

Parameters
    colors (str) – json list of roi colors

Returns
    change status

Return type
    bool

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

transpose()
    transposes ROIs

updateROIs(rid, coords)
    update ROIs

Parameters

•   rid (int) – roi id

•   coords (list < [float, float, float, float] >) – roi coordinates

class lavuelib.displayExtensions.SimpleLineROI(pos1, pos2, width=1e-05, **args)
    Bases: pyqtgraph.graphicsItems.ROI.LineROI

    simple line roi

    constructor

Parameters

•   pos1 ([float, float]) – start position

•   pos2 ([float, float]) – end position

•   args (dict`<:obj:`str, any>) – dictionary with ROI parameters

getCoordinates()
    provides the roi coordinates

Parameters
    trans (bool) – transposed flag

Returns
    x1, y1, x2, y2 positions of the roi

Return type
    [float, float, float, float]

class lavuelib.displayExtensions.VHBoundsExtension(parent=None)
    Bases: lavuelib.displayExtensions.DisplayExtension

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

name = None
    (str) tool name

show(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

updateHBounds(ydata1, ydata2)
    updates the horizontal bounds

Parameters

•   ydata1 (float) – first y-pixel position

•   ydata2 (float) – second y-pixel position

updateVBounds(xdata1, xdata2)
    updates the vertical bounds

Parameters

•   xdata1 (float) – first x-pixel position

•   xdata2 (float) – second x-pixel position

  lavuelib.edDictDialog module

editable list dialog

class lavuelib.edDictDialog.EdDictDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    editable list dialog

    constructor

Parameters
    parent (QtCore.QObject) – parent object

accept()
    updates class variables with the form content

createGUI()
    creates widget GUI

dirty = None
    (bool) dirty flag

headers = None
    (list <str>) table headers

newvalues = None
    (list <str>) table headers

record = None
    (dict <str, any>) data (name, value) dictionary

title = None
    (str) dialog title

lavuelib.edDictDialog.logger = <logging.Logger object>
    (logging.Logger) logger object

  lavuelib.filewriter module

Provides abstraction for file writer

class lavuelib.filewriter.FTAttribute(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTObject

    virtual file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

dtype
    attribute data type

Returns
    attribute data type

Return type
    str

read()
    read attribute value

Returns
    python object

Return type
    any

reopen()
    reopen attribute

shape
    attribute shape

Returns
    attribute shape

Return type
    list < int >

write(o)
    write attribute value

Parameters
    o (any) – python object

class lavuelib.filewriter.FTAttributeManager(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTObject

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

create(name, dtype, shape=None, overwrite=False)
    create a new attribute

Parameters

•   name (str) – attribute name

•   dtype (str) – attribute type

•   shape (list`< :obj:`int>) – attribute shape

•   overwrite (bool) – overwrite flag

Returns
    attribute object

Return type
    FTAtribute

reopen()
    reopen attribute

class lavuelib.filewriter.FTDataFilter(h5object=None, tparent=None)
    Bases: lavuelib.filewriter.FTObject

    file tree data filter

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

filterid
    getter for compression filter id

Returns
    compression rate

Return type
    int

options
    getter for compression options

Returns
    compression options

Return type
    tuple <int>

rate
    getter for compression rate

Returns
    compression rate

Return type
    int

reopen()
    reopen attribute

shuffle
    getter for compression shuffle

Returns
    compression shuffle

Return type
    bool

class lavuelib.filewriter.FTDeflate(h5object=None, tparent=None)
    Bases: lavuelib.filewriter.FTDataFilter

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.filewriter.FTField(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTObject

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    FTAttributeManager

dtype
    field data type

Returns
    field data type

Return type
    str

grow(dim=0, ext=1)
    grow the field

Parameters

•   dim (int) – growing dimension

•   dim – size of the grow

read()
    read the field value

Returns
    pni object

Return type
    any

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen attribute

shape
    field shape

Returns
    field shape

Return type
    list < int >

size
    field size

Returns
    field size

Return type
    int

write(o)
    write the field value

Parameters
    o (any) – pni object

class lavuelib.filewriter.FTFile(h5object, filename)
    Bases: lavuelib.filewriter.FTObject

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   filename (str) – file name

•   writer (PNIWriter or H5PYWriter or H5CppWriter) – writer module

classmethod currenttime()
    returns current time string

Returns
    current time

Return type
    str

flush()
    flash the data

hasswmr()
    if has swmr_mode

Returns
    has swmr_mode

Return type
    bool

name = None
    (str) file name

readonly
    check if file is readonly

Returns
    readonly flag

Return type
    bool

reopen(readonly=False, swmr=False, libver=None)
    reopen attribute

Parameters

•   readonly (bool) – readonly flag

•   swmr (bool) – swmr flag

•   libver (str) – library version, default: ‘latest’

root()
    root object

Returns
    parent object

Return type
    FTGroup

class lavuelib.filewriter.FTGroup(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTObject

    file tree group

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    FTAttributeManager

create_field(name, type_code, shape=None, chunk=None, dfilter=None)
    open a file tree element

Parameters

•   n (str) – group name

•   type_code (str) – nexus field type

•   shape (list < int >) – shape

•   chunk (list < int >) – chunk

•   dfilter (FTDeflate) – filter deflater

Returns
    file tree field

Return type
    FTField

create_group(n, nxclass='')
    open a file tree element

Parameters

•   n (str) – group name

•   nxclass (str) – group type

Returns
    file tree group

Return type
    FTGroup

exists(name)
    if child exists

Parameters
    name (str) – child name

Returns
    existing flag

Return type
    bool

names()
    read the child names

Returns
    pni object

Return type
    list <str>

open(name)
    open a file tree element

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

open_link(name)
    open a file tree element as link

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

reopen()
    reopen attribute

size
    group size

Returns
    group size

Return type
    int

stepsperfile = None
    (int) steps per file

class lavuelib.filewriter.FTLink(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTObject

    file tree link

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

refresh()
    refresh the link

Returns
    refreshed

Return type
    bool

reopen()
    reopen attribute

target_path
    target path

Returns
    target path

Return type
    str

class lavuelib.filewriter.FTObject(h5object, tparent=None)
    Bases: object

    virtual file tree object

    constructor

Parameters

•   h5object (any) – h5 object

•   tparent (FTObject) – tree parent

append(child)
    append child weakref

Parameters
    tparent (FTObject) – tree parent

close()
    close element

h5object
    provide object of native library

Returns
    pni object

Return type
    any

is_valid
    check if attribute is valid

Returns
    valid flag

Return type
    bool

parent
    return the parent object

Returns
    file tree group

Return type
    FTGroup

reload()
    reload a list of valid children

lavuelib.filewriter.create_file(filename, overwrite=False, **pars)
    create a new file

Parameters

•   filename (str) – file name

•   overwrite (bool) – overwrite flag

•   pars (dict < str, str>) – parameters

Returns
    file object

Return type
    FTFile

lavuelib.filewriter.data_filter(parent=None)
    create deflate filter

Parameters
    parent (FTObject) – parent object

Returns
    deflate filter object

Return type
    FTDeflate

lavuelib.filewriter.deflate_filter(parent=None)
    create deflate filter

Parameters
    parent (FTObject) – parent object

Returns
    deflate filter object

Return type
    FTDeflate

lavuelib.filewriter.first(array)
    get first element if the only

Parameters
    array (any) – numpy array

Returns
    first element of the array

lavuelib.filewriter.get_links(parent)
    get links

Parameters
    parent (FTObject) – parent object

Returns
    list of link objects

Return type

obj list <FTLink>

lavuelib.filewriter.link(target, parent, name)
    create link

Parameters

•   target (str) – file name

•   parent (FTObject) – parent object

•   name (str) – link name

Returns
    link object

Return type
    FTLink

lavuelib.filewriter.open_file(filename, readonly=False, **pars)
    open the new file

Parameters

•   filename (str) – file name

•   readonly (bool) – readonly flag

•   pars (dict < str, str>) – parameters

Returns
    file object

Return type
    FTFile

lavuelib.filewriter.setwriter(wr)
    sets writer

Parameters
    wr (PNIWriter or H5PYWriter or H5CppWriter) – writer module

lavuelib.filewriter.writerlock = <thread.lock object>
    (threading.Lock) writer module

  lavuelib.filters module

set of image sources

class lavuelib.filters.BaseFilter(configuration=None)
    Bases: object

    filter base class

    constructor

Parameters
    name – image name

initialize()
    initialize the filter

terminate()
    stop filter

class lavuelib.filters.FilterList(configlist=None)
    Bases: list

    Filter list

    constructor

Parameters
    configlist (: list < [str , str] >) – list with filter configuration

appendFilters(configlist)
    appends filters

Parameters
    configlist (: list < [str , str] >) – list with filter configuration

reset(configlist)
    reset filters

Parameters
    configlist (: list < [str , str] >) – list with filter configuration

  lavuelib.filtersGroupBox module

filter widget

class lavuelib.filtersGroupBox.FiltersGroupBox(parent=None)
    Bases: PyQt5.QtWidgets.QWidget

    Select how an image should be transformed.

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

changeView(showfilters=None)
    show or hide widgets

Parameters
    showfilters (bool) – filter widget shown

filtersChanged
    (pyqtgraph.QtCore.pyqtSignal) filter changed signal

setLabel(text)
    sets filter label

Parameters
    text (str) – label text

setState(state)
    sets filter state

Parameters
    tname (int) – filter state

setToolTip(text)
    sets filter label

Parameters
    text (str) – tool tip text

  lavuelib.geometryDialog module

detector geometry widget

class lavuelib.geometryDialog.GeometryDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    detector geometry widget class

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

centerx = None
    (float) x-coordinates of the center of the image

centery = None
    (float) y-coordinates of the center of the image

createGUI()
    create GUI

detdistance = None
    (float) detector distance in mm

energy = None
    (float) energy in eV

pixelsizex = None
    (float) pixel x-size in um

pixelsizey = None
    (float) pixel y-size in um

  lavuelib.h5cppwriter

Provides pni file writer

class lavuelib.h5cppwriter.H5CppAttribute(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTAttribute

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close attribute

dtype
    field data type

Returns
    field data type

Return type
    str

is_valid
    check if attribute is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

read()
    read attribute value

Returns
    python object

Return type
    any

reopen()
    reopen attribute

shape
    attribute shape

Returns
    attribute shape

Return type
    list < int >

write(o)
    write attribute value

Parameters
    o (any) – python object

class lavuelib.h5cppwriter.H5CppAttributeManager(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTAttributeManager

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close attribure manager

create(name, dtype, shape=None, overwrite=False)
    create a new attribute

Parameters

•   name (str) – attribute name

•   dtype (str) – attribute type

•   shape (list < int >) – attribute shape

•   overwrite (bool) – overwrite flag

Returns
    attribute object

Return type
    H5CppAtribute

is_valid
    check if link is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

reopen()
    reopen field

class lavuelib.h5cppwriter.H5CppDataFilter(h5object=None, tparent=None)
    Bases: lavuelib.filewriter.FTDataFilter

    file tree deflate

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.h5cppwriter.H5CppDeflate(h5object=None, tparent=None)
    Bases: lavuelib.h5cppwriter.H5CppDataFilter

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.h5cppwriter.H5CppField(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTField

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    H5CppAttributeManager

close()
    close field

dtype
    field data type

Returns
    field data type

Return type
    str

grow(dim=0, ext=1)
    grow the field

Parameters

•   dim (int) – growing dimension

•   dim – size of the grow

is_valid
    check if field is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

read()
    read the field value

Returns
    pni object

Return type
    any

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen field

shape
    field shape

Returns
    field shape

Return type
    list < int >

size
    field size

Returns
    field size

Return type
    int

write(o)
    write the field value

Parameters
    o (any) – pni object

class lavuelib.h5cppwriter.H5CppFile(h5object, filename)
    Bases: lavuelib.filewriter.FTFile

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   filename (str) – file name

close()
    close file

flush()
    flash the data

is_valid
    check if file is valid

Returns
    valid flag

Return type
    bool

path = None
    (str) object nexus path

readonly
    check if file is readonly

Returns
    readonly flag

Return type
    bool

reopen(readonly=False, swmr=False, libver=None)
    reopen file

Parameters

•   readonly (bool) – readonly flag

•   swmr (bool) – swmr flag

•   libver (str) – library version, default: ‘latest’

root()
    root object

Returns
    parent object

Return type
    H5CppGroup

class lavuelib.h5cppwriter.H5CppGroup(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTGroup

    file tree group

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – tree parent

class H5CppGroupIter(group)
    Bases: object

    constructor

Parameters
    group – group object

next()
    the next attribute

Returns
    attribute object

Return type
    FTAtribute

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    H5CppAttributeManager

close()
    close group

create_field(name, type_code, shape=None, chunk=None, dfilter=None)
    open a file tree element

Parameters

•   n (str) – group name

•   type_code (str) – nexus field type

•   shape (list < int >) – shape

•   chunk (list < int >) – chunk

•   dfilter (H5CppDataFilter) – filter deflater

Returns
    file tree field

Return type
    H5CppField

create_group(n, nxclass=None)
    open a file tree element

Parameters

•   n (str) – group name

•   nxclass (str) – group type

Returns
    file tree group

Return type
    H5CppGroup

exists(name)
    if child exists

Parameters
    name (str) – child name

Returns
    existing flag

Return type
    bool

is_valid
    check if field is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

names()
    read the child names

Returns
    pni object

Return type
    list <str>

open(name)
    open a file tree element

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

open_link(name)
    open a file tree element as link

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

path = None
    (str) object nexus path

reopen()
    reopen group

size
    group size

Returns
    group size

Return type
    int

class lavuelib.h5cppwriter.H5CppLink(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTLink

    file tree link

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close group

classmethod getfilename(obj)

is_valid
    check if link is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen field

target_path
    target path

Returns
    target path

Return type
    str

lavuelib.h5cppwriter.create_file(filename, overwrite=False, libver=None, swmr=None)
    create a new file

Parameters

•   filename (str) – file name

•   overwrite (bool) – overwrite flag

•   libver (str) – library version: ‘lastest’ or ‘earliest’

Returns
    file object

Return type
    H5CppFile

lavuelib.h5cppwriter.data_filter()
    create deflate filter

Returns
    deflate filter object

Return type
    H5CppDataFilter

lavuelib.h5cppwriter.deflate_filter()
    create deflate filter

Returns
    deflate filter object

Return type
    H5CppDataFilter

lavuelib.h5cppwriter.get_links(parent)
    get links

Parameters
    parent (FTObject) – parent object

Returns
    list of link objects

Returns
    link object

Return type

obj list <H5CppLink>

lavuelib.h5cppwriter.link(target, parent, name)
    create link

Parameters

•   target (str) – nexus path name

•   parent (FTObject) – parent object

•   name (str) – link name

Returns
    link object

Return type
    H5CppLink

lavuelib.h5cppwriter.nptype(dtype)
    converts to numpy types

Parameters
    dtype (str) – h5 writer type type

Returns
    nupy type

Return type
    str

lavuelib.h5cppwriter.open_file(filename, readonly=False, libver=None, swmr=False)
    open the new file

Parameters

•   filename (str) – file name

•   readonly (bool) – readonly flag

•   libver (str) – library version: ‘lastest’ or ‘earliest’

Returns
    file object

Return type
    H5CppFile

  lavuelib.h5pywriter

Provides h5py file writer

class lavuelib.h5pywriter.H5PYAttribute(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTAttribute

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close attribute

dtype
    attribute data type

Returns
    attribute data type

Return type
    str

is_valid
    check if field is valid

Returns
    valid flag

Return type
    bool

read()
    read attribute value

Returns
    python object

Return type
    any

reopen()
    reopen attribute

shape
    attribute shape

Returns
    attribute shape

Return type
    list < int >

write(o)
    write attribute value

Parameters
    o (any) – python object

class lavuelib.h5pywriter.H5PYAttributeManager(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTAttributeManager

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class H5PYAttrIter(manager)
    Bases: object

    constructor

Parameters
    manager (H5PYAttributeManager) – attribute manager

next()
    the next attribute

Returns
    attribute object

Return type
    FTAtribute

close()
    close attribure manager

create(name, dtype, shape=None, overwrite=False)
    create a new attribute

Parameters

•   name (str) – attribute name

•   dtype (str) – attribute type

•   shape (list < int >) – attribute shape

•   overwrite (bool) – overwrite flag

Returns
    attribute object

Return type
    H5PYAtribute

is_valid
    check if link is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

reopen()
    reopen field

class lavuelib.h5pywriter.H5PYDataFilter(h5object=None, tparent=None)
    Bases: lavuelib.filewriter.FTDataFilter

    file tree data filter

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.h5pywriter.H5PYDeflate(h5object=None, tparent=None)
    Bases: lavuelib.h5pywriter.H5PYDataFilter

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.h5pywriter.H5PYField(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTField

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    H5PYAttributeManager

close()
    close field

dtype
    field data type

Returns
    field data type

Return type
    str

grow(dim=0, ext=1)
    grow the field

Parameters

•   dim (int) – growing dimension

•   dim – size of the grow

is_valid
    check if group is valid

Returns
    valid flag

Return type
    bool

read()
    read the field value

Returns
    pni object

Return type
    any

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen field

shape
    field shape

Returns
    field shape

Return type
    list < int >

size
    field size

Returns
    field size

Return type
    int

write(o)
    write the field value

Parameters
    o (any) – pni object

class lavuelib.h5pywriter.H5PYFile(h5object, filename)
    Bases: lavuelib.filewriter.FTFile

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   filename (str) – file name

close()
    close file

flush()
    flash the data

hasswmr()
    if has swmr_mode

Returns
    has swmr_mode

Return type
    bool

is_valid
    check if group is valid

Returns
    valid flag

Return type
    bool

path = None
    (str) object nexus path

readonly
    check if file is readonly

Returns
    readonly flag

Return type
    bool

reopen(readonly=False, swmr=False, libver=None)
    reopen file

Parameters

•   readonly (bool) – readonly flag

•   swmr (bool) – swmr flag

•   libver (str) – library version, default: ‘latest’

root()
    root object

Returns
    parent object

Return type
    H5PYGroup

class lavuelib.h5pywriter.H5PYGroup(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTGroup

    file tree group

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class H5PYGroupIter(group)
    Bases: object

    constructor

Parameters
    group – group object

next()
    the next attribute

Returns
    attribute object

Return type
    FTAtribute

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    H5PYAttributeManager

close()
    close group

create_field(name, type_code, shape=None, chunk=None, dfilter=None)
    open a file tree element

Parameters

•   n (str) – group name

•   type_code (str) – nexus field type

•   shape (list < int >) – shape

•   chunk (list < int >) – chunk

•   dfilter (H5PYDataFilter) – filter deflater

Returns
    file tree field

Return type
    H5PYField

create_group(n, nxclass='')
    open a file tree element

Parameters

•   n (str) – group name

•   nxclass (str) – group type

Returns
    file tree group

Return type
    H5PYGroup

exists(name)
    if child exists

Parameters
    name (str) – child name

Returns
    existing flag

Return type
    bool

is_valid
    check if group is valid

Returns
    valid flag

Return type
    bool

names()
    read the child names

Returns
    pni object

Return type
    list <str>

open(name)
    open a file tree element

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

open_link(name)
    open a file tree element as link

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

reopen()
    reopen file

size
    group size

Returns
    group size

Return type
    int

class lavuelib.h5pywriter.H5PYLink(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTLink

    file tree link

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close group

classmethod getfilename(obj)

is_valid
    check if link is valid

Returns
    valid flag

Return type
    bool

read()
    read object value

Returns
    valid flag

Return type
    bool

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen field

setname(name)

target_path
    target path

Returns
    target path

Return type
    str

lavuelib.h5pywriter.create_file(filename, overwrite=False, **pars)
    create a new file

Parameters

•   filename (str) – file name

•   overwrite (bool) – overwrite flag

•   pars (dict < str, str>) – parameters

Returns
    file object

Return type
    H5PYFile

lavuelib.h5pywriter.data_filter()
    create deflate filter

Returns
    deflate filter object

Return type
    H5PYDataFilter

lavuelib.h5pywriter.deflate_filter()
    create deflate filter

Returns
    deflate filter object

Return type
    H5PYDataFilter

lavuelib.h5pywriter.get_links(parent)
    get links

Parameters
    parent (FTObject) – parent object

Returns
    list of link objects

Returns
    link object

Return type

obj list <PNILink>

lavuelib.h5pywriter.link(target, parent, name)
    create link

Parameters

•   target (str) – file name

•   parent (FTObject) – parent object

•   name (str) – link name

Returns
    link object

Return type
    H5PYLink

lavuelib.h5pywriter.nptype(dtype)
    converts to numpy types

Parameters
    dtype (str) – h5 writer type type

Returns
    nupy type

Return type
    str

lavuelib.h5pywriter.open_file(filename, readonly=False, **pars)
    open the new file

Parameters

•   filename (str) – file name

•   readonly (bool) – readonly flag

•   pars (dict < str, str>) – parameters

Returns
    file object

Return type
    H5PYFile

  lavuelib.hidraServerList module

A list of possible hidra servers. Take your pick.

lavuelib.hidraServerList.HIDRASERVERLIST = {'p03': ['haspp03pilatus.desy.de'], 'p08': ['haspp08pil100.desy.de', 'haspp08perk01.desy.de'], 'p09': ['haspp09pilatus.desy.de'], 'p10': ['haspp10pilatus.desy.de'], 'p11': ['haspp11pilatus.desy.de'], 'pool': ['haspilatus300k.desy.de', 'haspilatus1m.desy.de', 'haspilatus100k.desy.de']}
    (dict < str, list <str> >) server dictionary

  lavuelib.highValueMaskWidget module

mask widget

class lavuelib.highValueMaskWidget.HighValueMaskWidget(parent=None, settings=None)
    Bases: PyQt5.QtWidgets.QWidget

    Define and apply masking of the displayed image.

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   settings (lavuelib.settings.Settings) – lavue configuration settings

mask()
    provides the image mask high value

Returns
    high pixel value for masking

Return type
    str

maskHighValueChanged
    (pyqtgraph.QtCore.pyqtSignal) mask high value changed signal

noValue()
    unchecks the apply checkbox and clear the file display

setDisplayedValue(value)
    sets displayed high pixel value

Parameters
    name (str) – high pixel value

setMask(value)
    sets the image mask high value

Parameters
    fname (str) – high pixel value for masking

  lavuelib.histogramWidget module

Horizontal HistogramWidget

class lavuelib.histogramWidget.HistogramHLUTWidget(parent=None, bins=None, step=None, *args, **kargs)
    Bases: pyqtgraph.widgets.GraphicsView.GraphicsView

    Horizontal HistogramWidget

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   bins (str) – bins edges algorithm for histogram, default: ‘auto’

•   step (str or int) – data step for calculation of histogram levels, default: ‘auto’

•   args (list < any>) – HistogramHLUTItem parameters list

•   kargs (dict < str, any>) – HistogramHLUTItem parameter dictionary

item = None
    (HistogramHLUTItem) histogram item

setAutoFactor(factor)
    sets auto level factor

Parameters
    factor (float) – auto level factor of maximal peak

setBins(bins)
    sets bins edges algorithm for histogram

Parameters
    channel (str) – bins edges algorithm for histogram

setStep(step)
    sets image step data for algorithm of histogram

Parameters
    channel (int) – image step data for algorithm of histogram

sizeHint()
    sets size hint

  lavuelib.imageDisplayWidget module

image display widget

class lavuelib.imageDisplayWidget.AxesParameters
    Bases: object

    axes parameters

    constructor

enabled = None
    (bool) enabled flag

scale = None
    (tuple <float, float> ) image scale (x,y)

xtext = None
    (str) label of x-axis

xunits = None
    (str) units of x-axis

ytext = None
    (str) label of y-axis

yunits = None
    (str) units of y-axis

class lavuelib.imageDisplayWidget.ImageDisplayWidget(parent=None)
    Bases: pyqtgraph.widgets.GraphicsLayoutWidget.GraphicsLayoutWidget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

addExtensions(extlist)
    provides viewbox :param extlist: extension list :type extlist: list < DisplayExtension >

aspectLockedToggled
    (pyqtgraph.QtCore.pyqtSignal) aspect locked toggled signal

autoRange()
    sets auto range

axesunits()
    return axes units :returns: x,y units :rtype: (str, str)

currentData()
    provides the data

Returns
    current data

Return type
    numpy.ndarray

currentIntensity()
    provides intensity for current mouse position

Returns
    (x position, y position, pixel intensity, x position, y position)

Return type
    (float, float, float, float, float)

emitAspectLockedToggled(status)
    emits aspectLockedToggled

Parameters
    status (bool) – aspectLockedToggled status

extension(name)
    provides viewbox :param name: extension name :type name: str :rtype: DisplayExtension :returns: display extension

extensions()
    provides extension names

Return type
    list

Returns
    extension names

image()
    provides imageItem object

Returns
    image object

Return type
    pyqtgraph.imageItem.ImageItem

mouseImageDoubleClicked
    (pyqtgraph.QtCore.pyqtSignal) mouse double clicked

mouseImagePositionChanged
    (pyqtgraph.QtCore.pyqtSignal) mouse position changed signal

mouseImageSingleClicked
    (pyqtgraph.QtCore.pyqtSignal) mouse single clicked

mouse_click(event)
    updates image widget after mouse click

Parameters
    event (pyqtgraph.QtCore.QEvent) – mouse click event

mouse_position(event=None)
    updates image widget after mouse position change

Parameters
    event (pyqtgraph.QtCore.QEvent) – mouse move event

rawData()
    provides the raw data

Returns
    current raw data

Return type
    numpy.ndarray

rgb()
    gets RGB on/off

Returns
    True for on and False for off

Return type
    bool

scale()
    provides scale and position of the axes :rtype: [int, int, int, int] :returns: [posx, posy, scalex, scaley]

scaledxy(x, y)
    provides scaled x,y positions

Parameters

•   x (float) – x pixel coordinate

•   y (float) – y pixel coordinate

Returns
    scaled x,y position

Return type
    (float, float)

scaling()
    provides scaling type

Returns
    scaling type

Return type
    str

scalingLabel()
    provides scaling label

Returns
    scaling label

Return type
    str

setAspectLocked(flag)
    sets aspectLocked

Parameters
    status (bool) – state to set

Returns
    old state

Return type
    bool

setAutoDownSample(autodownsample)
    sets auto levels

Parameters
    autolevels (bool) – auto down sample enabled

setAutoLevels(autolevels)
    sets auto levels

Parameters
    autolevels (bool) – auto levels enabled

setDisplayMaxLevel(level=None)
    sets maximum intensity level

Parameters
    level (float) – maximum intensity

setDisplayMinLevel(level=None)
    sets minimum intensity level

Parameters
    level (float) – minimum intensity

setDoBkgSubtraction(state)
    sets do background subtraction flag

Parameters
    status (bool) – do background subtraction flag

setDoubleClickLock(status=True)
    sets double click lock :param status: status flag :type status: bool

setPolarScale(position=None, scale=None)
    set axes scales

Parameters

•   position ([float, float]) – start position of axes

•   scale ([float, float]) – scale axes

•   update – update scales on image

setScalingType(scalingtype)
    sets intensity scaling types

Parameters
    scalingtype (str) – intensity scaling type

setStatsWOScaling(status)
    sets statistics without scaling flag

Parameters
    status (bool) – statistics without scaling flag

Returns
    change status

Return type
    bool

setSubWidgets(parameters)
    set subwidget properties

Parameters
    parameters (lavuelib.toolWidget.ToolParameters) – tool parameters

setTicks()
    launch axes widget

Returns
    apply status

Return type
    bool

setTransformations(transpose, leftrightflip, updownflip)
    sets coordinate transformations

Parameters

•   transpose (bool) – transpose coordinates flag

•   leftrightflip (bool) – left-right flip coordinates flag

•   updownflip (bool) – up-down flip coordinates flag

setViewRange(rangelist)
    set view range values

Parameters
    rangelist (str) – xmin,ymin,xsize,ysize

setrgb(status=True)
    sets RGB on/off

Parameters
    status (bool) – True for on and False for off

transformations()
    povides coordinates transformations

Returns
    transpose, leftrightflip, updownflip flags

Return type
    (bool, bool, bool)

updateImage(img=None, rawimg=None)
    updates the image to display

Parameters

•   img (numpy.ndarray) – 2d image array

•   rawimg (numpy.ndarray) – 2d raw image array

updateMetaData(axisscales=None, axislabels=None)
    update Metadata informations

Parameters

•   axisscales ([float, float, float, float]) – [xstart, ystart, xscale, yscale]

•   axislabels ([float, float, float, float]) – [xtext, ytext, xunits, yunits]

viewRange()
    get view range values

Returns
    xmin,ymin,xsize,ysize

Rtype rangelist
    str

viewbox()
    provides viewbox :rtype: pyqtgraph.ViewBox :returns: viewbox

class lavuelib.imageDisplayWidget.IntensityParameters
    Bases: object

    intensity parameters

    constructor

dobkgsubtraction = None
    (bool) do background substraction

scaling = None
    (str) intensity scaling

statswoscaling = None
    (bool) calculate statistics without scaling

class lavuelib.imageDisplayWidget.SafeImageItem(*args, **kargs)
    Bases: pyqtgraph.graphicsItems.ImageItem.ImageItem

    Image item which caught exceptions in paint

    constructor

Parameters

•   args (list < any>) – ImageItem parameters list

•   kargs (dict < str, any>) – ImageItem parameter dictionary

paint(p, *args)
    safe paint method

Parameters

•   p (PyQt5.QtGui.QPainter) – painter

•   args (list < any>) – ImageItem parameters list

class lavuelib.imageDisplayWidget.TransformationParameters
    Bases: object

    transformation parameters

    constructor

leftrightflip = None
    (bool) left-right flip coordinates flag

transpose = None
    (bool) transpose coordinates flag

updownflip = None
    (bool) up-down flip coordinates flag

  lavuelib.imageField

configuration widget

class lavuelib.imageField.ImageField(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

createGUI()
    create GUI

field = None
    (str) selected field

fields = None
    (dict <str, dict <str, any>>) image field dictionary

frame = None
    (int) frame

growing = None
    (int) growing dimension

  lavuelib.imageFileHandler module

this a simple file handler that loads image files and delivers just the actual array

class lavuelib.imageFileHandler.CBFLoader
    Bases: object

    CBF loader

classmethod load(flbuffer)
    loads CBF file image data into numpy array

Parameters
    flbuffer (numpy.ndarray) – numpy array with CBF file image data

Returns
    image data

Return type
    numpy.ndarray

classmethod metadata(flbuffer)
    extract header_contents from CBF file image data

Parameters
    flbuffer (numpy.ndarray or str) – numpy array with CBF file image data

Returns
    metadata dictionary

Return type
    numpy.ndarray

lavuelib.imageFileHandler.FABIO = True
    (bool) fabio can be imported

class lavuelib.imageFileHandler.ImageFileHandler(fname)
    Bases: object

    Simple file handler class. Reads image from file and returns the numpy array.

    constructor

Parameters
    fname (str) – file name

getImage()
    provides the image data

Returns
    image data

Return type
    numpy.ndarray

getMetaData()
    provides the image metadata

Returns
    JSON dictionary with image metadata

Return type
    str

class lavuelib.imageFileHandler.NexusFieldHandler(fname=None, writer=None)
    Bases: object

    Nexus file handler class. Reads image from file and returns the numpy array.

    constructor

Parameters

•   fname (str) – file name

•   writer (str) – h5 writer module: “pni” or “h5py”

classmethod extract(value)

findImageFields()
    provides a dictionary with of all image fields

Returns
    dictionary of the field names and the field objects

Return type
    dict <str, dict <str, any>>

classmethod getImage(node, frame=-1, growing=0, refresh=True)
    parses the field and add it into the description list

Parameters

•   node (pni.io.nx.h5.nxfield or pni.io.nx.h5.nxgroup or pni.io.nx.h5.nxlink or pni.io.nx.h5.nxattribute or pni.io.nx.h5.nxroot) – nexus field node

•   frame (int) – frame to take, the last one is -1

•   growing (int) – growing dimension

•   refresh (bool) – refresh image node

Returns
    get the image

Return type
    numpy.ndarray

classmethod getLastFrame(node, growing=0, refresh=True)
    provides the last frame number

Parameters

•   node (pni.io.nx.h5.nxfield or pni.io.nx.h5.nxgroup or pni.io.nx.h5.nxlink or pni.io.nx.h5.nxattribute or pni.io.nx.h5.nxroot) – nexus field node

•   growing (int) – growing dimension

•   refresh (bool) – refresh image node

Returns
    a number of frames

Return type
    int

classmethod getMetaData(node, mdata=None, maxrec=4)
    provides the image metadata

Returns
    JSON dictionary with image metadata

Return type
    str

getNode(field)
    get node :param field: field path :type field: str :returns: nexus field node :rtype: pni.io.nx.h5.nxfield or pni.io.nx.h5.nxgroup or pni.io.nx.h5.nxlink or pni.io.nx.h5.nxattribute or pni.io.nx.h5.nxroot

lavuelib.imageFileHandler.PILLOW = True
    (bool) PIL can be imported

class lavuelib.imageFileHandler.TIFLoader
    Bases: object

    TIF loader

classmethod load(flbuffer)
    loads TIF file image data into numpy array

Parameters
    flbuffer (numpy.ndarray) – numpy array with TIF file image data

Returns
    image data

Return type
    numpy.ndarray

lavuelib.imageFileHandler.WRITERS = {'h5cpp': <module 'lavuelib.h5cppwriter' from '/home/jkotan/ndts/lavue/lavuelib/h5cppwriter.pyc'>, 'h5py': <module 'lavuelib.h5pywriter' from '/home/jkotan/ndts/lavue/lavuelib/h5pywriter.pyc'>, 'pni': <module 'lavuelib.pniwriter' from '/home/jkotan/ndts/lavue/lavuelib/pniwriter.pyc'>}
    (dict <str, module> ) nexus writer modules

  lavuelib.imageSource module

set of image sources

class lavuelib.imageSource.BaseSource(timeout=None)
    Bases: object

    source base class

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

disconnect()
    disconnects the source

errormessage = None
    (str) errormessage

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

getMetaData()
    get metadata

Returns
    dictionary with metadata

Return type
    dict <str, any>

setConfiguration(configuration)
    set configuration

Parameters
    configuration (str) – configuration string

setTimeOut(timeout)
    set timeout

Parameters
    timeout (int) – timeout in ms

class lavuelib.imageSource.DOOCSPropSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as IMAGE DOOCS property

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

class lavuelib.imageSource.FixTestSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as Tango attributes describing an image file name and its directory

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

disconnect()
    disconnects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

lavuelib.imageSource.HIDRA = True
    (bool) hidra imported

class lavuelib.imageSource.HTTPSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as HTTP request response

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

class lavuelib.imageSource.HiDRASource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    hidra image source

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

disconnect()
    disconnects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

setConfiguration(configuration)
    set configuration

Parameters
    configuration (str) – configuration string

class lavuelib.imageSource.NXSFileSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as Tango attributes describing an image file name and its directory

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

disconnect()
    disconnects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

lavuelib.imageSource.PILLOW = True
    (bool) PIL imported

lavuelib.imageSource.PYDOOCS = False
    (bool) pydoocs imported

lavuelib.imageSource.PYTANGO = True
    (bool) PyTango imported

lavuelib.imageSource.REQUESTS = True
    (bool) requests imported

class lavuelib.imageSource.TangoAttrSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as IMAGE Tango attribute

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

class lavuelib.imageSource.TangoEventsCB(client, name, mutex)
    Bases: object

    tango attribute callback class

    constructor

Parameters

•   client (str) – tango controller client

•   name (str) – attribute name

•   mutex – mutex lock for CB

push_event(*args, **kwargs)
    callback method receiving the event

class lavuelib.imageSource.TangoEventsSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as IMAGE Tango attribute

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

disconnect()
    disconnects the source

fresh = None
    (bool) fresh attribute flag

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

reading = None
    (bool) reading flag

class lavuelib.imageSource.TangoFileSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as Tango attributes describing an image file name and its directory

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

class lavuelib.imageSource.VDEOdecoder
    Bases: object

    VIDEO IMAGE LIMA decoder

    constructor

Brief
    It clears the local variables

decode()
    provides the decoded data

Returns
    the decoded data if data was loaded

Return type
    numpy.ndarray

dtype = None
    (str) data type

format = None
    (str) decoder format

load(data)
    loads encoded data

Parameters
    data ([str, str]) – encoded data

name = None
    (str) decoder name

shape()
    provides the data shape

Returns
    the data shape if data was loaded

Return type
    list <int >

lavuelib.imageSource.ZMQMAJOR = 4
    (str,:obj:str) zmq major version, zmq minor version

lavuelib.imageSource.ZMQMINOR = 3
    (str,:obj:str) zmq major version, zmq minor version

class lavuelib.imageSource.ZMQSource(timeout=None)
    Bases: lavuelib.imageSource.BaseSource

    image source as ZMQ stream

    constructor

Parameters
    timeout (int) – timeout for setting connection in ms

connect()
    connects the source

disconnect()
    disconnects the source

getData()
    provides image name, image data and metadata

Returns
    image name, image data, json dictionary with metadata

Return type
    (str , numpy.ndarray , str)

setConfiguration(configuration)
    set configuration

Parameters
    configuration (str) – configuration string

lavuelib.imageSource.tobytes(x)
    decode str to bytes

Parameters
    x (str) – string

Returns
    decode string in byte array

Return type
    bytes

lavuelib.imageSource.tostr(x)
    decode bytes to str

Parameters
    x (bytes) – string

Returns
    decode string in byte array

Return type
    str

  lavuelib.imageWidget module

image widget

class lavuelib.imageWidget.ImageWidget(parent=None, tooltypes=None, settings=None, rgbtooltypes=None)
    Bases: PyQt5.QtWidgets.QWidget

    The part of the GUI that incorporates the image view.

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   tooltypes (list <str>) – tool class names

•   settings (lavuelib.settings.Settings) – lavue configuration settings

•   rgbtooltypes (list <str>) – tool class names

applyROIs(rlabel, roispin)
    saves ROIs in sardana and add them to the measurement group

Parameters

•   rlabel (str) – rois aliases separated by space

•   roispin (int) – the current number of rois

applyTipsChanged
    (pyqtgraph.QtCore.pyqtSignal) apply tips changed signal

aspectLockedToggled
    (pyqtgraph.QtCore.pyqtSignal) aspect locked toggled signal

autoRange()
    sets auto range

axesunits()
    return axes units :returns: x,y units :rtype: (str, str)

bottomplotShowMenu(freeze=False, clear=False)
    shows freeze or/and clean action in the menu

Parameters

•   freeze (bool) – freeze show status

•   freeze – clean show status

calcROIsum()
    calculates the current roi sum

Returns
    sum roi value, roi id

Return type
    (str, int)

calcROIsums()
    calculates all roi sums

Returns
    sum roi value, roi id

Return type
    list < float >

changeMeshRegion()
    changes the current roi region

changeROIRegion()
    changes the current roi region

clearBottomPlotClicked
    (pyqtgraph.QtCore.pyqtSignal) clear clicked signal

currentCut()
    provides current cut id

Returns
    cut id

Return type
    int

currentData()
    provides the data

Returns
    current data

Return type
    numpy.ndarray

currentIntensity()
    provides intensity for current mouse position

Returns
    x position, y position, pixel intensity

Return type
    (float, float, float)

currentROI()
    provides current roi id

Returns
    roi id

Return type
    int

currentTool()
    provides the current tool

Returns
    current tool name

Return type
    str

currentToolChanged
    (pyqtgraph.QtCore.pyqtSignal) current tool changed signal

cutCoords()
    provides cuts coordinates

Returns
    cuts coordinates

Return type
    list < [float, float, float, float] >

cutCoordsChanged
    (pyqtgraph.QtCore.pyqtSignal) cut coordinate changed signal

cutData(cid=None)
    provides the current cut data

Parameters
    cid (int) – cut id

Returns
    current cut data

Return type
    numpy.ndarray

cutNumberChanged
    (pyqtgraph.QtCore.pyqtSignal) cut number changed signal

emitAspectLockedToggled(status)
    emits aspectLockedToggled

Parameters
    status (bool) – current state

emitCutCoordsChanged()
    emits cutCoordsChanged

emitReplotImage(autorange=True)
    emits replotImage

fetchROIs(rlabel)
    loads ROIs from sardana

Parameters
    rlabel (str) – rois aliases separated by space

freezeBottomPlotClicked
    (pyqtgraph.QtCore.pyqtSignal) freeze clicked signal

geometryChanged
    (pyqtgraph.QtCore.pyqtSignal) geometry changed

getDoor()
    runs macro

Parameters
    command (list <str>) – command list

Returns
    macro runned

Return type
    bool

getElementNames(listattr, typefilter=None)
    provides experimental Channels

Parameters

•   listattr (str) – pool attribute with list

•   typefilter (list <str>) – pool attribute with list

Returns
    names from given pool listattr

Return type
    list <str>

image()
    provides imageItem object

Returns
    image object

Return type
    pyqtgraph.ImageItem

imagePlotted
    (pyqtgraph.QtCore.pyqtSignal) image plotted signal

meshCoords()
    provides rois coordinates

Returns
    rois coordinates

Return type
    list < [float, float, float, float] >

meshCoordsChanged
    (pyqtgraph.QtCore.pyqtSignal) mesh coordinate changed signal

mouseImageDoubleClicked
    (pyqtgraph.QtCore.pyqtSignal) mouse double clicked

mouseImagePositionChanged

mouseImageSingleClicked
    (pyqtgraph.QtCore.pyqtSignal) mouse single clicked

onedbarbottomplot()
    creates 1d bottom bar plot

Returns
    1d bottom bar plot

Return type
    pyqtgraph.BarGraphItem

onedbarrightplot()
    creates 1d right bar plot

Returns
    1d right bar plot

Return type
    pyqtgraph.BarGraphItem

onedbottomplot(clear=False)
    creates 1d bottom plot

Parameters
    clear (bool) – clear flag

Returns
    1d bottom plot

Return type
    pyqtgraph.PlotDataItem

onedrightplot(clear=False)
    creates 1d right plot

Parameters
    clear (bool) – clear flag

Returns
    1d right plot

Return type
    pyqtgraph.PlotDataItem

plot(array, rawarray=None)
    plots the image

Parameters

•   array (numpy.ndarray) – 2d image array

•   rawarray (numpy.ndarray) – 2d raw image array

rawData()
    provides the raw data

Returns
    current raw data

Return type
    numpy.ndarray

removebottomplot(plot)
    removes bottom plot

Parameters
    plot (pyqtgraph.PlotItem) – right plot item

removerightplot(plot)
    removes right plot

Parameters
    plot (pyqtgraph.PlotItem) – right plot item

replotImage
    (pyqtgraph.QtCore.pyqtSignal) replot image signal

rgb()
    gets RGB on/off

Returns
    True for on and False for off

Return type
    bool

roiAliasesChanged
    (pyqtgraph.QtCore.pyqtSignal) roi aliases changed signal

roiCoords()
    provides rois coordinates

Returns
    rois coordinates

Return type
    list < [float, float, float, float] >

roiCoordsChanged
    (pyqtgraph.QtCore.pyqtSignal) roi coordinate changed signal

roiLineEditChanged
    (pyqtgraph.QtCore.pyqtSignal) roi Line Edit changed signal

roiNumberChanged
    (pyqtgraph.QtCore.pyqtSignal) roi number changed signal

roiValueChanged
    (pyqtgraph.QtCore.pyqtSignal) roi value changed signal

roilabels = None
    (obj`str`) roi labels

runMacro(command)
    runs macro

Parameters
    command (list <str>) – command list

Returns
    macro runned

Return type
    bool

sardanaEnabled
    (pyqtgraph.QtCore.pyqtSignal) sardana enabled signal

scaledxy(x, y)
    provides scaled x,y positions

Parameters

•   x (float) – x pixel coordinate

•   y (float) – y pixel coordinate

Returns
    scaled x,y position

Return type
    (float, float)

scaling()
    provides scaling type

Returns
    scaling type

Return type
    str

scalingLabel()
    provides scaling label

Returns
    scaling label

Return type
    str

setAspectLocked(status)
    sets aspectLocked

Parameters
    status (bool) – state to set

Returns
    old state

Return type
    bool

setAutoDownSample(autodownsample)
    sets auto down sample

Parameters
    autolevels (bool) – auto down sample enabled

setAutoLevels(autolevels)
    sets auto levels

Parameters
    autolevels (:obj:'int`) – 2: auto levels enabled 1: with autofactor

setDisplayedText(text=None)
    sets displayed info text and recalculates the current roi sum

Parameters
    text (str) – text to display

setDoBkgSubtraction(state)
    sets do background subtraction flag

Parameters
    status (bool) – do background subtraction flag

setDoubleClickLock(status=True)
    sets double click lock

Parameters
    status (bool) – status flag

setExtensionsRefreshTime(refreshtime)
    set display extension refresh time

Parameters
    refreshtime (float) – refresh time in seconds

setMaxLevel(level=None)
    sets maximum intensity level

Parameters
    level (float) – maximum intensity

setMaximaPos(positionlist)
    sets maxima postions

Parameters
    positionlist (list < (float, float) >) – [(x1, y1), … , (xn, yn)]

setMinLevel(level=None)
    sets minimum intensity level

Parameters
    level (float) – minimum intensity

setPolarScale(position=None, scale=None)
    get axes parameters

Parameters

•   position ([float, float]) – start position of axes

•   scale ([float, float]) – scale axes

setROIsColors(colors)
    sets statistics without scaling flag

Parameters
    colors (str) – json list of roi colors

Returns
    change status

Return type
    bool

setSardanaUtils(sardana)
    sets sardana utils

Parameters
    sardana (lavuelib.sardanaUtils.SardanaUtils) – sardana utils

setScalingType(scalingtype)
    sets intensity scaling types

Parameters
    scalingtype (str) – intensity scaling type

setStatsWOScaling(status)
    sets statistics without scaling flag

Parameters
    status (bool) – statistics without scaling flag

Returns
    change status

Return type
    bool

setTangoClient(tangoclient)
    sets tango client

Parameters
    tangoclient (lavuelib.controllerClient.ControllerClient) – attribute name

setTicks()
    launch axes widget

Returns
    apply status

Return type
    bool

setTool(tool)
    sets tool from string

Parameters
    tool (str) – tool name

setTransformations(transpose, leftrightflip, updownflip, orgtranspose, orgleftrightflip, orgupdownflip)
    sets coordinate transformations

Parameters

•   transpose (bool) – transpose coordinates flag

•   leftrightflip (bool) – left-right flip coordinates flag

•   updownflip (bool) – up-down flip coordinates flag

•   orgtranspose (bool) – selected transpose coordinates flag

•   orgleftrightflip (bool) – selected left-right flip coordinates flag

•   orgupdownflip (bool) – selected up-down flip coordinates flag

setViewRange(rangelist)
    set view range values

Parameters
    rangelist (str) – xmin,ymin,xsize,ysize

setrgb(status=True)
    sets RGB on/off

Parameters
    status (bool) – True for on and False for off

settings()
    provides settings

Returns
    setting object

Return type
    lavuelib.settings.Settings

showCurrentRGBTool()
    shows the current tool

showCurrentTool()
    shows the current tool

showDoorError()
    show door error

showTool(text)
    shows the current tool

tool()
    provices tool from string

Parameters
    tool (str) – tool name

transformations()
    povides coordinates transformations

Returns
    transpose, leftrightflip, updownflip flags

Return type
    (bool, bool, bool)

updateBeamCenterX(x)
    updates the beam center x

Parameters
    x (float) – beam center x

updateBeamCenterY(y)
    updates the beam center y

Parameters
    y (float) – beam center y

updateCenter(xdata, ydata)
    updates the image center

Parameters

•   xdata (float) – x pixel position

•   ydata (float) – y-pixel position

updateCuts(cid, coords=None)
    update Cuts

Parameters

•   cid (int) – cut id

•   coords (list < [float, float, float, float, float] >) – cut coordinates and width

updateDetectorDistance(distance)
    updates the detector distance

Parameters
    distance (float) – detector distance

updateDetectorROIs(rois)
    updates the detector ROIs

Parameters
    distance (str) – json dictionary with detector ROIs

updateDisplayedText(text)
    sets displayed info text

Parameters
    text (str) – text to display

updateDisplayedTextTip(text)
    sets displayed info text tup

Parameters
    text (str) – tip text to display

updateEnergy(energy)
    updates the beam energy

Parameters
    energy (float) – beam energy

updateHBounds(xdata1, xdata2)
    updates the vertical bounds

Parameters

•   xdata1 (float) – first x-pixel position

•   xdata2 (float) – second x-pixel position

updateMetaData(axisscales=None, axislabels=None)
    update Metadata informations

Parameters

•   axisscales ([float, float, float, float]) – [xstart, ystart, xscale, yscale]

•   axislabels ([float, float, float, float]) – [xtext, ytext, xunits, yunits]

updatePositionMark(xdata, ydata)
    updates the position mark

Parameters

•   xdata (float) – x pixel position

•   ydata (float) – y-pixel position

updateROIs(rid, coords=None)
    update ROIs

Parameters

•   rid (int) – roi id

•   coords (list < [float, float, float, float] >) – roi coordinates

updateToolComboBox(toolnames, name=None)
    set tool by changing combobox

Parameters

•   toolnames (list < str >) – tool names

•   index (int) – combobox index

updateVBounds(ydata1, ydata2)
    updates the vertical bounds

Parameters

•   ydata1 (float) – first x-pixel position

•   ydata2 (float) – second x-pixel position

updateinfowidgets(parameters)

viewRange()
    get view range values

Returns
    xmin,ymin,xsize,ysize

Rtype rangelist
    str

writeAttribute(name, value)
    writes attribute value of device

Parameters

•   name (str) – attribute name

•   value (any) – attribute value

writeDetectorROIsAttribute()
    writes DetectorROIsattribute value of device

writeDetectorROIsValuesAttribute(rvalues)
    writes DetectorROIsValuesattribute of device

Parameters
    rvalues (obj`list < :obj:`float>) – list of roi values

  lavuelib.intervalsDialog module

interval device widget

class lavuelib.intervalsDialog.IntervalsDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    interval widget class

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

createGUI()
    create GUI

itime = None
    (float) integration time in seconds

xintervals = None
    (int) number of x intervals

yintervals = None
    (int) number of y intervals

  lavuelib.levelsGroupBox module

level widget

class lavuelib.levelsGroupBox.LevelsGroupBox(parent=None, settings=None, expertmode=False)
    Bases: PyQt5.QtWidgets.QWidget

    Set minimum and maximum displayed values and its color.

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   settings (lavuelib.settings.Settings) – lavue configuration settings

•   expertmode (bool) – expert mode flag

autoFactor()
    provides factor for automatic levels

Returns
    factor for automatic levels

Return type
    str

autoLevelsChanged
    (pyqtgraph.QtCore.pyqtSignal) automatic levels changed signal

changeView(showhistogram=None, showlevels=None, showadd=None)
    shows or hides the histogram widget

Parameters

•   showhistogram (bool) – if histogram should be shown

•   showlevels (bool) – if levels should be shown

•   showadd (bool) – if additional histogram should be shown

gradient()
    provides the current color gradient

Returns
    gradient name

Return type
    str

isAutoLevel()
    returns if automatics levels are enabled

Returns
    if automatics levels are enabled

Return type
    bool

levels()
    provides levels from configuration string

Returns
    configuration string: lowlim,uplim

Return type
    str

levelsChanged
    (pyqtgraph.QtCore.pyqtSignal) levels changed signal

maxLevelChanged
    (pyqtgraph.QtCore.pyqtSignal) maximum level changed signal

minLevelChanged
    (pyqtgraph.QtCore.pyqtSignal) minimum level changed signal

setAutoFactor(factor)
    sets factor for automatic levels

Parameters
    factor (str) – factor for automatic levels

setAutoLevels(auto)
    enables or disables automatic levels

Parameters
    auto (bool or int) – if automatics levels to be set

setBins(index)
    sets bins edges algorithm for histogram

Parameters
    index (int) – bins edges algorithm index for histogram

setGradient(name)
    sets gradient

    :param name gradient name :type name: str

setImageItem(image)
    sets histogram image

Parameters
    image (pyqtgraph.graphicsItems.ImageItem.ImageItem) – histogram image

setLevels(cnflevels)
    set levels from configuration string

Parameters
    cnflevels (str) – configuration string: lowlim,uplim

setScalingLabel(scalingtype)
    sets scaling label

Parameters
    scalingtype (str) – scaling type, i.e. log, linear, sqrt

setrgb(status=True)
    sets RGB on/off

Parameters
    status (bool) – True for on and False for off

showGradient(status=True)
    resets color channel

Parameters
    status (bool) – show gradient flag

storeSettingsRequested
    (pyqtgraph.QtCore.pyqtSignal) store settings requested

updateAutoLevels(lowlim, uplim)
    set min/max level spinboxes and histogram from the parameters

Parameters

•   lowlim (float) – minimum intensity value

•   uplim (float) – maximum intensity value

updateCustomGradients(gradients)

updateHistoImage(autoLevel=None)
    executes imageChanged of histogram with the givel autoLevel

Parameters
    autoLevel (bool) – if automatics levels to be set

updateLevels(lowlim, uplim)
    set min/max level spinboxes and histogram from the parameters

Parameters

•   lowlim (float) – minimum intensity value

•   uplim (float) – maximum intensity value

  lavuelib.liveViewer module

live viewer settings

class lavuelib.liveViewer.LiveViewer(options, parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    The master class for the dialog, contains all other widget and handles communication.

    constructor

Parameters

•   options (argparse.Namespace) – commandline options

•   parent (pyqtgraph.QtCore.QObject) – parent object

closeEvent(event)
    stores the setting before finishing the application

Parameters
    event (pyqtgraph.QtCore.QEvent:) – close event

keyPressEvent(event)
    skips escape key action

Parameters
    event (pyqtgraph.QtCore.QEvent:) – close event

rgb()
    gets RGB on/off

Returns
    True for on and False for off

Return type
    bool

setrgb(status=True)
    sets RGB on/off

Parameters
    status (bool) – True for on and False for off

class lavuelib.liveViewer.MainWindow(options, parent=None)
    Bases: PyQt5.QtWidgets.QMainWindow

    constructor

Parameters

•   options (argparse.Namespace) – commandline options

•   parent (pyqtgraph.QtCore.QObject) – parent object

closeEvent(event)
    stores the setting before finishing the application

Parameters
    event (pyqtgraph.QtCore.QEvent:) – close event

  lavuelib.maskWidget module

mask widget

class lavuelib.maskWidget.MaskWidget(parent=None, settings=None)
    Bases: PyQt5.QtWidgets.QWidget

    Define and apply masking of the displayed image.

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   settings (lavuelib.settings.Settings) – lavue configuration settings

applyStateChanged
    (pyqtgraph.QtCore.pyqtSignal) apply state change signal

isMaskApplied()
    if background subtraction applied :returns: apply status :rtype: bool

maskFileSelected
    (pyqtgraph.QtCore.pyqtSignal) mask file selected signal

noImage()
    unchecks the apply checkbox and clear the file display

setDisplayedName(name)
    sets displayed file name

Parameters
    name (str) – file name

setMask(fname)
    sets the image mask

Parameters
    fname (str) – file name

  lavuelib.memoExportDialog

image display widget

lavuelib.memoExportDialog.GraphicsScene_showExportDialog(self)
    dynamic replacement of GraphicsScene.showExportDialog

class lavuelib.memoExportDialog.MemoExportDialog(scene)
    Bases: pyqtgraph.GraphicsScene.exportDialog.ExportDialog

    ExportDialog with bookkeeping parameters

exportFormatChanged(item, prev)

class lavuelib.memoExportDialog.MemoPlotWidget(parent=None, background='default', **kargs)
    Bases: pyqtgraph.widgets.PlotWidget.PlotWidget

    Plot Widget with improved Export Dialog

clearClicked
    (pyqtgraph.QtCore.pyqtSignal) clear clicked signal

freezeClicked
    (pyqtgraph.QtCore.pyqtSignal) freeze clicked signal

showMenu(freeze=False, clear=False)
    shows freeze or/and clear action in the menu

Parameters

•   freeze (bool) – freeze show status

•   freeze – clear show status

  lavuelib.memoryBufferGroupBox

Memory Buffer widget

class lavuelib.memoryBufferGroupBox.MemoryBufferGroupBox(parent=None)
    Bases: PyQt5.QtWidgets.QGroupBox

    Set circular memory buffer for images

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

changeView(show=False)
    shows or hides the histogram widget

Parameters
    show (bool) – if histogram should be shown

initialize()
    initialize the filter

onOff(status)
    switch on/off the widget

Parameters
    status (int) – flag on/off

process(image, imagename)
    append image to the buffer and returns image buffer and metadata

Parameters

•   image (numpy.ndarray) – numpy array with an image

•   imagename (str) – image name

Returns
    numpy array with an image

Return type
    (numpy.ndarray, :obj`dict`<str, str>) or None

setBufferSize(buffersize)
    sets buffer size

Parameters
    buffersize (int or str) – maximal number of images in the buffer

setMaxBufferSize(maxbuffersize)
    sets maximal buffer size

Parameters
    maxbuffersize (int or str) – maximal number of images in the buffer

  lavuelib.messageBox module

error message box

class lavuelib.messageBox.MessageBox(parent)
    Bases: PyQt5.QtCore.QObject

    error message box

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

classmethod getText(default, error=None)
    provides error message text fro sys.exc_info()

Parameters

•   default (str) – default message test

•   error (Exception) – exception to describe

Returns
    exception message

Return type
    str

classmethod warning(parent, title, text, detailedText=None, icon=None)
    creates warning messagebox

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   title (str) – message box title

•   text (str) – message box text

•   detailedText (str) – message box detailed text

•   icon (pyqtgraph.QtCore.QIcon) – message box icon

lavuelib.messageBox.PYTANGO = True
    (bool) PyTango imported

  lavuelib.motorWatchThread module

motor watch thread

lavuelib.motorWatchThread.GLOBALREFRESHRATE = 0.1
    (float) refresh rate in seconds

class lavuelib.motorWatchThread.MotorWatchThread(motor1, motor2, server=None)
    Bases: PyQt5.QtCore.QThread

    constructor

Parameters

•   motor1 (PyTango.DeviceProxy) – first motor device proxy

•   motor2 (PyTango.DeviceProxy) – second motor device proxy

•   mserver (PyTango.DeviceProxy) – door server device proxy

isRunning()
    is datasource source connected

Returns
    if datasource source connected

Return type
    bool

motorStatusSignal
    (pyqtgraph.QtCore.pyqtSignal) signal with motor status

run()
    runner of the fetching thread

stop()
    stops loop

watchingFinished
    (pyqtgraph.QtCore.pyqtSignal) watching finished

  lavuelib.pniwriter

Provides pni file writer

class lavuelib.pniwriter.PNIAttribute(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTAttribute

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close attribute

dtype
    attribute data type

Returns
    attribute data type

Return type
    str

is_valid
    check if attribute is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

read()
    read attribute value

Returns
    python object

Return type
    any

reopen()
    reopen attribute

shape
    attribute shape

Returns
    attribute shape

Return type
    list < int >

write(o)
    write attribute value

Parameters
    o (any) – python object

class lavuelib.pniwriter.PNIAttributeManager(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTAttributeManager

    file tree attribute

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close attribure manager

create(name, dtype, shape=None, overwrite=False)
    create a new attribute

Parameters

•   name (str) – attribute name

•   dtype (str) – attribute type

•   shape (list < int >) – attribute shape

•   overwrite (bool) – overwrite flag

Returns
    attribute object

Return type
    PNIAtribute

is_valid
    check if link is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

reopen()
    reopen field

class lavuelib.pniwriter.PNIDataFilter(h5object=None, tparent=None)
    Bases: lavuelib.filewriter.FTDataFilter

    file tree deflate

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.pniwriter.PNIDeflate(h5object=None, tparent=None)
    Bases: lavuelib.pniwriter.PNIDataFilter

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

class lavuelib.pniwriter.PNIField(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTField

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    PNIAttributeManager

close()
    close field

dtype
    field data type

Returns
    field data type

Return type
    str

grow(dim=0, ext=1)
    grow the field

Parameters

•   dim (int) – growing dimension

•   dim – size of the grow

is_valid
    check if field is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

read()
    read the field value

Returns
    pni object

Return type
    any

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen field

shape
    field shape

Returns
    field shape

Return type
    list < int >

size
    field size

Returns
    field size

Return type
    int

write(o)
    write the field value

Parameters
    o (any) – pni object

class lavuelib.pniwriter.PNIFile(h5object, filename)
    Bases: lavuelib.filewriter.FTFile

    file tree file

    constructor

Parameters

•   h5object (any) – pni object

•   filename (str) – file name

close()
    close file

flush()
    flash the data

is_valid
    check if file is valid

Returns
    valid flag

Return type
    bool

path = None
    (str) object nexus path

readonly
    check if file is readonly

Returns
    readonly flag

Return type
    bool

reopen(readonly=False, swmr=False, _=None)
    reopen file

Parameters

•   readonly (bool) – readonly flag

•   swmr (bool) – swmr flag

•   libver (str) – library version, default: ‘latest’

root()
    root object

Returns
    parent object

Return type
    PNIGroup

class lavuelib.pniwriter.PNIGroup(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTGroup

    file tree group

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – tree parent

class PNIGroupIter(group)
    Bases: object

    constructor

Parameters
    group – group object

next()
    the next attribute

Returns
    attribute object

Return type
    FTAtribute

attributes
    return the attribute manager

Returns
    attribute manager

Return type
    PNIAttributeManager

close()
    close group

create_field(name, type_code, shape=None, chunk=None, dfilter=None)
    open a file tree element

Parameters

•   n (str) – group name

•   type_code (str) – nexus field type

•   shape (list < int >) – shape

•   chunk (list < int >) – chunk

•   dfilter (PNIDataFilter) – filter deflater

Returns
    file tree field

Return type
    PNIField

create_group(n, nxclass='')
    open a file tree element

Parameters

•   n (str) – group name

•   nxclass (str) – group type

Returns
    file tree group

Return type
    PNIGroup

exists(name)
    if child exists

Parameters
    name (str) – child name

Returns
    existing flag

Return type
    bool

is_valid
    check if field is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

names()
    read the child names

Returns
    pni object

Return type
    list <str>

open(name)
    open a file tree element

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

open_link(name)
    open a file tree element as link

Parameters
    name (str) – element name

Returns
    file tree object

Return type
    FTObject

path = None
    (str) object nexus path

reopen()
    reopen group

size
    group size

Returns
    group size

Return type
    int

class lavuelib.pniwriter.PNILink(h5object, tparent=None)
    Bases: lavuelib.filewriter.FTLink

    file tree link

    constructor

Parameters

•   h5object (any) – pni object

•   tparent (FTObject) – treee parent

close()
    close group

is_valid
    check if link is valid

Returns
    valid flag

Return type
    bool

name = None
    (str) object name

path = None
    (str) object nexus path

refresh()
    refresh the field

Returns
    refreshed

Return type
    bool

reopen()
    reopen field

target_path
    target path

Returns
    target path

Return type
    str

lavuelib.pniwriter.create_file(filename, overwrite=False, libver=None)
    create a new file

Parameters

•   filename (str) – file name

•   overwrite (bool) – overwrite flag

•   libver (str) – library version: ‘lastest’ or ‘earliest’

Returns
    file object

Return type
    PNIFile

lavuelib.pniwriter.data_filter()
    create deflate filter

Returns
    deflate filter object

Return type
    PNIDataFilter

lavuelib.pniwriter.deflate_filter()
    create deflate filter

Returns
    deflate filter object

Return type
    PNIDataFilter

lavuelib.pniwriter.get_links(parent)
    get links

Parameters
    parent (FTObject) – parent object

Returns
    list of link objects

Returns
    link object

Return type

obj list <PNILink>

lavuelib.pniwriter.link(target, parent, name)
    create link

Parameters

•   target (str) – file name

•   parent (FTObject) – parent object

•   name (str) – link name

Returns
    link object

Return type
    PNILink

lavuelib.pniwriter.open_file(filename, readonly=False, libver=None)
    open the new file

Parameters

•   filename (str) – file name

•   readonly (bool) – readonly flag

•   libver (str) – library version: ‘lastest’ or ‘earliest’

Returns
    file object

Return type
    PNIFile

  lavuelib.preparationGroupBox module

preparationbox widget

class lavuelib.preparationGroupBox.PreparationGroupBox(parent=None, settings=None)
    Bases: PyQt5.QtWidgets.QGroupBox

    colection of image preperation widgets

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   settings (lavuelib.settings.Settings) – lavue configuration settings

changeView(showmask=None, showsub=None, showtrans=None, showhighvaluemask=None)
    show or hide widgets in the preparation colection

Parameters

•   showmask (bool) – mask widget shown

•   showsub (bool) – subtraction widget shown

•   showtrans (bool) – transformation widget shown

•   showhighvaluemask (bool) – mask widget shown

highValueMaskWidget = None
    (lavuelib.maskWidget.Maskwidget) mask widget

maskWidget = None
    (lavuelib.maskWidget.Maskwidget) mask widget

class lavuelib.preparationGroupBox.QHLine
    Bases: PyQt5.QtWidgets.QFrame

    horizontal line

    constructor

  lavuelib.qtuic module

uic support

  lavuelib.rangeDialog module

detector range widget

class lavuelib.rangeDialog.RangeDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    detector range widget class

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

createGUI()
    create GUI

polend = None
    (float) end position of polar angle

polsize = None
    (int) grid size of polar angle

polstart = None
    (float) start position of polar angle

radqend = None
    (float) end position of radial coordinate

radqsize = None
    (int) grid size of radial coordinate

radqstart = None
    (float) start position of radial coordinate

radthend = None
    (float) end position of radial coordinate

radthsize = None
    (int) grid size of radial coordinate

radthstart = None
    (float) start position of radial coordinate

  lavuelib.release module

release version

  lavuelib.sardanaUtils module

sardana utils

lavuelib.sardanaUtils.PYTANGO = True
    (bool) PyTango imported

class lavuelib.sardanaUtils.SardanaUtils
    Bases: object

    sardanamacro server

    constructor

getDeviceName(cname, db=None)
    finds device of give class

Parameters

•   cname (str) – device class name

•   db (PyTango.Database) – tango database

Returns
    device name if exists

Return type
    str

getElementNames(door, listattr, typefilter=None)
    provides experimental Channels

Parameters

•   door (str) – door device name

•   listattr (str) – pool attribute with list

•   typefilter (list <str>) – pool attribute with list

Returns
    names from given pool listattr

Return type
    list <str>

getError(door)
    stores Scan Environment Data

Parameters
    door (str) – door device

Returns
    error or warning

Return type
    str

getMacroServer(door)
    door macro server device name

Parameters
    door (str) – door device name

Returns
    macroserver device proxy

Return type
    PyTango.DeviceProxy

getPools(door)
    provides pool devices

Parameters
    door (str) – door device name

classmethod getProxies(names)
    provides proxies of given device names

Parameters
    names (list <str>) – given device names

Returns
    list of device DeviceProxies

Return type
    list <PyTango.DeviceProxy>

getScanEnv(door, params=None)
    fetches Scan Environment Data

Parameters
    door (str) – door device

Returns
    JSON String with important variables

Return type
    str

classmethod openProxy(device, counter=1000)
    opens device proxy of the given device

Parameters
    device (str) – device name

Returns
    DeviceProxy of device

Return type
    PyTango.DeviceProxy

runMacro(door, command, wait=True)
    stores Scan Environment Data

Parameters

•   door (str) – door device

•   command (list <str>) – list with the macro name and its parameters

•   wait (bool) – wait till macro is finished

Returns
    result, error or warning

Return type
    [str, str]

setScanEnv(door, jdata)
    stores Scan Environment Data

Parameters

•   door (str) – door device

•   jdata (str) – JSON String with important variables

classmethod toString(obj)
    converts list/dict/object of unicode/string to string object

Parameters
    obj (any) – given unicode/string object

Returns
    string object

Return type
    str

wait(name=None, proxy=None, maxcount=100)
    stores Scan Environment Data

Parameters

•   name (str) – device name

•   proxy (str) – door device proxy

•   maxcount (int) – number of 0.01s to wait

  lavuelib.scalingGroupBox module

scalingGroupBox

class lavuelib.scalingGroupBox.ScalingGroupBox(parent=None)
    Bases: PyQt5.QtWidgets.QGroupBox

    Select how the image intensity is supposed to be scaled.

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

changeView(showscale=False)
    shows or hides the histogram widget

Parameters
    showhistogram (bool) – if histogram should be shown

currentScaling()
    provides the current scaling

Returns
    current scaline

Return type
    str

scalingChanged
    (pyqtgraph.QtCore.pyqtSignal) scaling changed signal

setScaling(scaling)
    sets scaling from string

Parameters
    scaling – scaling name, i.e. linear, log or sqrt

simpleScalingChanged
    (pyqtgraph.QtCore.pyqtSignal) simple scaling changed signal

  lavuelib.settings module

live viewer image display base it on a qt dialog

class lavuelib.settings.Settings
    Bases: object

    lavue configuration settings

    constructor

addrois = None
    (bool) add rois to sardana

analysisdevice = None
    (str) analysis device name

aspectlocked = None
    (bool) image aspect ratio locked

autodownsample = None
    (bool) auto down sample

autozmqtopics = None
    (bool) automatic zmq source topics

bkgimagename = None
    (str) last background image file name

calcvariance = None
    (bool) calculate variance

centerx = None
    (float) x-coordinates of the center of the image

centery = None
    (float) y-coordinates of the center of the image

customGradients()
    sets source display parameters

Returns
    custom gradients

Return type
    dict <str, any>

defdetservers = None
    (bool) use default detector servers

detdistance = None
    (float) detector distance in mm

detservers = None
    (list < str>) hidra detector server list

dirtrans = None
    (str) file name translation json dictionary

distance2mm(distance)
    converts distance to mm units

Parameters
    distance (float or (float, str)) – distance as value in m or tuple with units

Returns
    distance in mm

Return type
    float

distance2pixels(distance, psize)
    converts distance to pixels

Parameters

•   distance (float or (float, str)) – distance as value in pixels or tuple with units

•   psize (float) – pixel size

Returns
    distance in pixels

Return type
    float

distance2um(distance)
    converts distance to um units

Parameters
    distance (float or (float, str)) – distance as value in m or tuple with units

Returns
    distance in um

Return type
    float

doorname = None
    (str) door device name

energy = None
    (float) energy in eV

filters = None
    (str) json list with filters

geometryfromsource = None
    (bool) fetch geometry from source

hidraport = None
    (str) hidra data port

imagename = None
    (str) last image file name

imagesources = None
    (str) json list with image source widget names

interruptonerror = None
    (bool) interrupt on error

keepcoords = None
    (bool) keep original coordinates

lazyimageslider = None
    (bool) lazy image slider

length2ev(length)
    converts length to energy in eV

Parameters
    length (float or (float, str)) – length as value in A or tuple with units

Returns
    energy in eV

Return type
    float

load(settings)
    load settings

Parameters
    settings (pyqtgraph.QtCore.QSettings) – QSettings object

Returns
    error messages list

Return type
    list < (str, str) >

maskimagename = None
    (str) last mask image file name

maxmbuffersize = None
    (int) maximal number of images in memory buffer

nxslast = None
    (bool) nexus file source starts from the last image

nxsopen = None
    (bool) nexus file source keeps the file open

orderrois = None
    (bool) fetch rois order enabled

pixelsize2um(psize)
    converts pixel size to um units

Parameters
    psize (float or (float, str, float, str)) – pixelsize as value in m or tuple with units

Returns
    pixelsize in um

Return type
    (float, float)

pixelsizex = None
    (float) pixel x-size in um

pixelsizey = None
    (float) pixel y-size in um

refreshrate = None
    (float) refresh rate is s

roiscolors = None
    (str) json list with roi colors

sardana = None
    (bool) sardana enabled

secautoport = None
    (bool) search for security stream port automatically

seccontext = None
    (zmq.Context) zmq context

secport = None
    (str) security stream port

secsocket = None
    (zmq.Socket) zmq security stream socket

secsockopt = None
    (bool) security stream options

secstream = None
    (bool) security stream enabled

sendrois = None
    (bool) send rois to LavueController flag

setCustomGradients(gradients)
    sets custom gradients

Parameters
    gradients (dict <str, any>) – custom gradients

setSourceDisplay(source, values)
    sets source display parameters

Parameters

•   source (str) – source name

•   values (dict <str, any>) – display parameter dictionary

showaddhisto = None
    (bool) show intensity hostogram

showallrois = None
    (bool) show all rois flag

showfilters = None
    (bool) show filter widget

showframerate = None
    (bool) show frame rate widget

showhighvaluemask = None
    (bool) show mask widget

showhisto = None
    (bool) show intensity hostogram

showlevels = None
    (bool) show intensity levels widget

showmask = None
    (bool) show mask widget

showmbuffer = None
    (bool) show memory buffer widget

showscale = None
    (bool) show intensity scale widget

showstats = None
    (bool) show mask widget

showsub = None
    (bool) show bakcground subtraction widget

showtrans = None
    (bool) show transformation widget

sourceDisplay(source)
    gets source display parameters

Parameters
    source (str) – source name

Returns
    display parameter dictionary

Return type
    dict <str, any>

sourcedisplay = None
    (bool) store display parameters for specific sources

statswoscaling = None
    (bool) statistics without scaling

store(settings)
    Stores settings in QSettings object

Parameters
    settings (pyqtgraph.QtCore.QSettings) – QSettings object

storegeometry = None
    (bool) store detector geometry

timeout = None
    (int) image source timeout for connection

toolrefreshtime = None
    (float) tool refresh rate time is s

toolwidgets = None
    (str) json list with tool widget names

updateMetaData(**kargs)
    update physical parameters

Parameters
    kargs (dict < str, any>) – physical parameter dictionary

xyposition2pixels(xypos)
    converts xy position to pixel units

Parameters
    xypos (float or (float, str, float, str)) – xy-position a tuple value or tuple with units

Returns
    xy-position in pixels

Return type
    (float, float)

zeromask = None
    (bool) zero mask enabled

zmqtopics = None
    (list < str > ) zmq source topics

  lavuelib.sourceGroupBox module

image source selection

class lavuelib.sourceGroupBox.SourceGroupBox(parent=None, sourcetypes=None, expertmode=False)
    Bases: PyQt5.QtWidgets.QGroupBox

    image source selection

    constructor

Parameters

•   parent (pyqtgraph.QtCore.QObject) – parent object

•   sourcetypes (list <str>) – source type class names

•   expertmode (bool) – expert mode flag

addIconClicked
    (pyqtgraph.QtCore.pyqtSignal) add Icon Clicked

configuration()
    provides configuration for the current image source

Returns
    configuration string

Rtype configuration
    str

configurationChanged
    (pyqtgraph.QtCore.pyqtSignal) source server name signal

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectFailure()
    set connection status off and display connection status

connectSuccess(port=None)
    set connection status on and display connection status

Parameters
    port – zmq port

currentDataSource()
    current data source

Returns
    current datasource class name

Return type
    str

currentDataSourceName()
    current data source name

Returns
    current datasource class name

Return type
    str

emitSourceChanged()
    emits sourceChanged signal

isConnected()
    is datasource source connected

Returns
    if datasource source connected

Return type
    bool

removeIconClicked
    (pyqtgraph.QtCore.pyqtSignal) remove Icon Clicked

setErrorStatus(status='')
    set error status

Parameters
    status (str) – error status

setSourceComboBox(index)
    set source by changing combobox

Parameters
    index (int) – combobox index

setSourceComboBoxByName(name)
    set source by changing combobox by name

Parameters
    name (str) – combobox name

setTargetName(name)
    set target name

Parameters
    name (str) – source name

sourceChanged
    (pyqtgraph.QtCore.pyqtSignal) source state signal

sourceConnected
    (pyqtgraph.QtCore.pyqtSignal) source connected signal

sourceDisconnected
    (pyqtgraph.QtCore.pyqtSignal) source disconnected signal

sourceLabelChanged
    (pyqtgraph.QtCore.pyqtSignal) source label name signal

sourceStateChanged
    (pyqtgraph.QtCore.pyqtSignal) source state signal

start()
    starts viewing if pushButton enable

toggleServerConnection()
    toggles server connection

updateButton(status)
    update slot for test source

updateLayout()
    update source layout

updateMetaData(**kargs)
    update source input parameters

Parameters
    kargs (dict < str, any>) – source widget input parameter dictionary

updateSourceComboBox(sourcenames, name=None)
    set source by changing combobox

Parameters

•   sourcenames (list < str >) – source names

•   index (int) – combobox index

  lavuelib.sourceWidget module

image source selection

class lavuelib.sourceWidget.SourceBaseWidget(parent=None)
    Bases: PyQt5.QtWidgets.QWidget

    general source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

active = None
    (bool) source widget active

addIconClicked
    (pyqtgraph.QtCore.pyqtSignal) add Icon Clicked

alias = 'test'
    (str) source alias

buttonEnabled
    (pyqtgraph.QtCore.pyqtSignal) push button enabled signal

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configurationChanged
    (pyqtgraph.QtCore.pyqtSignal) source server name signal

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'BaseSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventObjectFilter(event, combobox, varname, atdict, atlist)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

expertmode = None
    (bool) expertmode flag

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'Test'
    (str) source name

removeIconClicked
    (pyqtgraph.QtCore.pyqtSignal) remove Icon Clicked

requires = ()
    (tuple <str>) capitalized required packages

sourceLabelChanged
    (pyqtgraph.QtCore.pyqtSignal) source label name signal

sourceStateChanged
    (pyqtgraph.QtCore.pyqtSignal) source state signal

updateButton()
    update slot for test source

updateComboBox()
    abstract updateComboBox

updateMetaData(**kargs)
    update source input parameters

Parameters
    kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

widgets = None
    (list <PyQt5.QtGui.QWidget>) subwidget objects

class lavuelib.sourceWidget.HidraSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'hidra'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'HiDRASource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'Hidra'
    (str) source name

requires = ('HIDRA',)
    (tuple <str>) capitalized required packages

updateButton()
    update slot for Hidra source

updateMetaData(serverdict=None, hidraport=None, **kargs)
    update source input parameters

Parameters

•   serverdict (dict < str, list <str> >) – server dictionary

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.HTTPSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'http'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'HTTPSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'HTTP response'
    (str) source name

requires = ('REQUESTS',)
    (tuple <str>) capitalized required packages

updateButton()
    update slot for HTTP response source

updateComboBox()
    updates ComboBox

updateMetaData(httpurls=None, **kargs)
    update source input parameters

Parameters

•   httpurls (str) – json dictionary with (label, http urls) items

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.TangoAttrSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'tangoattr'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'TangoAttrSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'Tango Attribute'
    (str) source name

requires = ('PYTANGO',)
    (tuple <str>) capitalized required packages

updateButton()
    update slot for Tango attribute source

updateComboBox()
    updates ComboBox

updateMetaData(tangoattrs=None, **kargs)
    update source input parameters

Parameters

•   tangoattrs (str) – json dictionary with (label, tango attribute) items

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.TangoEventsSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'tangoevents'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'TangoEventsSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'Tango Events'
    (str) source name

requires = ('PYTANGO',)
    (tuple <str>) capitalized required packages

updateButton()
    update slot for Tango attribute source

updateComboBox()
    updates ComboBox

updateMetaData(tangoevattrs=None, **kargs)
    update source input parameters

Parameters

•   tangoevattrs (str) – json dictionary with (label, tango attribute) items

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.TangoFileSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'tangofile'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'TangoFileSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'Tango File'
    (str) source name

requires = ('PYTANGO',)
    (tuple <str>) capitalized required packages

updateButton()
    update slot for Tango file source

updateComboBox()
    updates ComboBox

updateMetaData(tangofileattrs=None, tangodirattrs=None, dirtrans=None, **kargs)
    update source input parameters

Parameters

•   tangofileattrs (str) – json dictionary with (label, file tango attribute) items

•   tangodirattrs (str) – json dictionary with (label, dir tango attribute) items

•   dirtrans (str) – json dictionary with directory and file name translation

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.DOOCSPropSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'doocsprop'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'DOOCSPropSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'DOOCS Property'
    (str) source name

requires = ('PYDOOCS',)
    (tuple <str>) capitalized required packages

updateButton()
    update slot for Tango attribute source

updateComboBox()
    updates ComboBox

updateMetaData(doocsprops=None, **kargs)
    update source input parameters

Parameters

•   doocsprops (str) – json dictionary with (label, tango attribute) items

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.ZMQSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'zmqsource'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'ZMQSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'ZMQ Stream'
    (str) source name

updateButton(disconnect=True)
    update slot for ZMQ source

updateComboBox()
    updates ComboBox

updateMetaData(zmqtopics=None, autozmqtopics=None, datasources=None, disconnect=True, zmqservers=None, **kargs)
    update source input parameters

Parameters

•   zmqtopics (list <str> >) – zmq source topics

•   autozmqtopics (bool) – automatic zmq topics enabled

•   datasources (list <str> >) – automatic zmq source topics

•   disconnect (bool) – disconnect on update

•   zmqservers (str) – json dictionary with (label, zmq servers) items

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.NXSFileSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'nxsfile'
    (str) source alias

configuration()
    provides configuration for the current image source

Returns configuration
    configuration string

Rtype configuration
    str

configure(configuration)
    set configuration for the current image source

Parameters
    configuration (str) – configuration string

connectWidget()
    connects widget

datasource = 'NXSFileSource'
    (str) datasource class name

disconnectWidget()
    disconnects widget

eventFilter(obj, event)
    event filter

Parameters

•   obj – qt object

•   event – qt event

Returns
    status flag

Return type
    bool

label()
    return a label of the current detector

Returns
    label of the current detector

Return type
    str

name = 'NeXus File'
    (str) source name

updateButton()
    update slot for Tango file source

updateMetaData(nxsopen=None, nxslast=None, **kargs)
    update source input parameters

Parameters

•   nxsopen (bool) – nexus file source keeps the file open

•   nxslast (bool) – nexus file source starts from the last image

•   kargs (dict < str, any>) – source widget input parameter dictionary

widgetnames = None
    (list <str>) subwidget object names

class lavuelib.sourceWidget.TestSourceWidget(parent=None)
    Bases: lavuelib.sourceWidget.SourceBaseWidget

    test source widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

lavuelib.sourceWidget.swproperties = [{'alias': 'hidra', 'widget': 'HidraSourceWidget', 'requires': ('HIDRA',), 'name': 'Hidra'}, {'alias': 'http', 'widget': 'HTTPSourceWidget', 'requires': ('REQUESTS',), 'name': 'HTTP response'}, {'alias': 'tangoattr', 'widget': 'TangoAttrSourceWidget', 'requires': ('PYTANGO',), 'name': 'Tango Attribute'}, {'alias': 'tangoevents', 'widget': 'TangoEventsSourceWidget', 'requires': ('PYTANGO',), 'name': 'Tango Events'}, {'alias': 'tangofile', 'widget': 'TangoFileSourceWidget', 'requires': ('PYTANGO',), 'name': 'Tango File'}, {'alias': 'doocsprop', 'widget': 'DOOCSPropSourceWidget', 'requires': ('PYDOOCS',), 'name': 'DOOCS Property'}, {'alias': 'zmqsource', 'widget': 'ZMQSourceWidget', 'requires': (), 'name': 'ZMQ Stream'}, {'alias': 'nxsfile', 'widget': 'NXSFileSourceWidget', 'requires': (), 'name': 'NeXus File'}, {'alias': 'test', 'widget': 'TestSourceWidget', 'requires': (), 'name': 'Test'}]
    ( dict < str, any > ) source widget properties

  lavuelib.statisticsGroupBox module

statistics widget

class lavuelib.statisticsGroupBox.StatisticsGroupBox(parent=None)
    Bases: PyQt5.QtWidgets.QGroupBox

    Display some general image statistics.

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

changeView(showstats=False, showvariance=False)
    shows or hides the histogram widget

Parameters
    showhistogram (bool) – if histogram should be shown

updateStatistics(mean, maximum, variance, scaling)
    update image statistic values

Parameters
    meanparent – parent object

  lavuelib.takeMotorsDialog module

motor device widget

lavuelib.takeMotorsDialog.PYTANGO = True
    (bool) PyTango imported

class lavuelib.takeMotorsDialog.TakeMotorsDialog(parent=None)
    Bases: PyQt5.QtWidgets.QDialog

    detector geometry widget class

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

accept()
    updates class variables with the form content

createGUI()
    create GUI

motortips = None
    (list`<:obj:`str>) motortips list

title = None
    (str) group title

xmotordevice = None
    (PyTango.DeviceProxy) x motor device

xmotorname = None
    (str) x motor name

ymotordevice = None
    (PyTango.DeviceProxy) y motor device

ymotorname = None
    (str) y motor name

  lavuelib.toolWidget module

image widget

class lavuelib.toolWidget.IntensityToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    intensity tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

alias = 'intensity'
    (str) tool name alias

name = 'Intensity'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

class lavuelib.toolWidget.ROIToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    roi tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

alias = 'roi'
    (str) tool name alias

applyROIPressed
    (pyqtgraph.QtCore.pyqtSignal) apply ROI pressed signal

disactivate()
    disactivates tool widget

fetchROIPressed
    (pyqtgraph.QtCore.pyqtSignal) fetch ROI pressed signal

name = 'ROI'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

roiInfoChanged
    (pyqtgraph.QtCore.pyqtSignal) roi info Changed signal

setROIsNumber(rid)
    sets a number of rois

Parameters
    rid (int) – number of rois

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

updateApplyTips(rid)
    updates apply tips

Parameters
    rid (int) – current roi id

updateROIButton(enabled)
    enables/disables ROI buttons

Parameters
    enable (bool) – buttons enabled

updateROIDisplayText(text, currentroi, roiVal)
    updates ROI display text

Parameters

•   text (str) – standard display text

•   currentroi (str) – current roi label

•   text – roi sum value

updateROILineEdit(text)
    updates ROI line edit text

Parameters
    text (str) – text to update

class lavuelib.toolWidget.LineCutToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    line-cut tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

afterplot()
    command after plot

alias = 'linecut'
    (str) tool name alias

disactivate()
    activates tool widget

name = 'LineCut'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

class lavuelib.toolWidget.AngleQToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    angle/q tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

alias = 'angle/q'
    (str) tool name alias

beforeplot(array, rawarray)
    command before plot

Parameters

•   array (numpy.ndarray) – 2d image array

•   rawarray (numpy.ndarray) – 2d raw image array

Returns
    2d image array and raw image

Return type
    (numpy.ndarray, numpy.ndarray)

disactivate()
    disactivates tool widget

name = 'Angle/Q'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

updateGeometryTip()
    update geometry tips

updateRangeTip()
    update geometry tips

class lavuelib.toolWidget.MotorsToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    motors tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

alias = 'movemotors'
    (str) tool name alias

name = 'MoveMotors'
    (str) tool name

requires = ('PYTANGO',)
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

class lavuelib.toolWidget.MeshToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    mesh tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

alias = 'meshscan'
    (str) tool name alias

disactivate()
    disactivates tool widget

name = 'MeshScan'
    (str) tool name

requires = ('PYTANGO',)
    (tuple <str>) capitalized required packages

roiInfoChanged
    (pyqtgraph.QtCore.pyqtSignal) roi info Changed signal

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

updateROIDisplayText(text, currentroi, roiVal)
    updates ROI display text

Parameters

•   text (str) – standard display text

•   currentroi (str) – current roi label

•   text – roi sum value

class lavuelib.toolWidget.OneDToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    1d plot tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

afterplot()
    command after plot

alias = '1d-plot'
    (str) tool name alias

beforeplot(array, rawarray)
    command before plot

Parameters

•   array (numpy.ndarray) – 2d image array

•   rawarray (numpy.ndarray) – 2d raw image array

Returns
    2d image array and raw image

Return type
    (numpy.ndarray, numpy.ndarray)

disactivate()
    activates tool widget

name = '1d-Plot'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

class lavuelib.toolWidget.ProjectionToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    Projections tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

afterplot()
    command after plot

alias = 'projections'
    (str) tool name alias

disactivate()
    activates tool widget

name = 'Projections'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

class lavuelib.toolWidget.MaximaToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    angle/q tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

alias = 'maxima'
    (str) tool name alias

beforeplot(array, rawarray)
    command before plot

Parameters

•   array (numpy.ndarray) – 2d image array

•   rawarray (numpy.ndarray) – 2d raw image array

Returns
    2d image array and raw image

Return type
    (numpy.ndarray, numpy.ndarray)

disactivate()
    disactivates tool widget

name = 'Maxima'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

updateGeometryTip()
    update geometry tips

class lavuelib.toolWidget.QROIProjToolWidget(parent=None)
    Bases: lavuelib.toolWidget.ToolBaseWidget

    angle/q +roi + projections tool widget

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

activate()
    activates tool widget

afterplot()
    command after plot

alias = 'q+roi+proj'
    (str) tool name alias

applyROIPressed
    (pyqtgraph.QtCore.pyqtSignal) apply ROI pressed signal

disactivate()
    disactivates tool widget

fetchROIPressed
    (pyqtgraph.QtCore.pyqtSignal) fetch ROI pressed signal

name = 'Q+ROI+Proj'
    (str) tool name

requires = ()
    (tuple <str>) capitalized required packages

roiInfoChanged
    (pyqtgraph.QtCore.pyqtSignal) roi info Changed signal

setROIsNumber(rid)
    sets a number of rois

Parameters
    rid (int) – number of rois

signal2slot = None
    (list < [pyqtgraph.QtCore.pyqtSignal, str] >) list of [signal, slot] object to connect

updateApplyTips(rid)
    updates apply tips

Parameters
    rid (int) – current roi id

updateGeometryTip()
    update geometry tips

updateROIButton(enabled)
    enables/disables ROI buttons

Parameters
    enable (bool) – buttons enabled

updateROIDisplayText(text, currentroi, roiVal)
    updates ROI display text

Parameters

•   text (str) – standard display text

•   currentroi (str) – current roi label

•   text – roi sum value

updateROILineEdit(text)
    updates ROI line edit text

Parameters
    text (str) – text to update

lavuelib.toolWidget.twproperties = [{'alias': 'intensity', 'widget': 'IntensityToolWidget', 'requires': (), 'name': 'Intensity'}, {'alias': 'roi', 'widget': 'ROIToolWidget', 'requires': (), 'name': 'ROI'}, {'alias': 'linecut', 'widget': 'LineCutToolWidget', 'requires': (), 'name': 'LineCut'}, {'alias': 'angle/q', 'widget': 'AngleQToolWidget', 'requires': (), 'name': 'Angle/Q'}, {'alias': 'movemotors', 'widget': 'MotorsToolWidget', 'requires': ('PYTANGO',), 'name': 'MoveMotors'}, {'alias': 'meshscan', 'widget': 'MeshToolWidget', 'requires': ('PYTANGO',), 'name': 'MeshScan'}, {'alias': '1d-plot', 'widget': 'OneDToolWidget', 'requires': (), 'name': '1d-Plot'}, {'alias': 'projections', 'widget': 'ProjectionToolWidget', 'requires': (), 'name': 'Projections'}, {'alias': 'maxima', 'widget': 'MaximaToolWidget', 'requires': (), 'name': 'Maxima'}, {'alias': 'q+roi+proj', 'widget': 'QROIProjToolWidget', 'requires': (), 'name': 'Q+ROI+Proj'}]
    ( dict < str, any > ) tool widget properties

  lavuelib.transformationsWidget module

transformation widget

class lavuelib.transformationsWidget.TransformationsWidget(parent=None)
    Bases: PyQt5.QtWidgets.QWidget

    Select how an image should be transformed.

    constructor

Parameters
    parent (pyqtgraph.QtCore.QObject) – parent object

setEnable(flag)
    disables or enables the combobox

Parameters
    flag (bool) – combobox to be enabled

setKeepCoordsLabel(flag, transpose=False)
    sets keep original coordinates label according to flag

Parameters
    flag (bool) – keep original coordinates flag

setTransformation(tname)
    sets transformation from the string

Parameters
    tname (str) – transfromation name

transformation()
    provides transformation name

Returns
    transfromation name

Return type
    str

transformationChanged
    (pyqtgraph.QtCore.pyqtSignal) transformation changed signal

  Module contents

Live Viewer widgets

•   genindex

•   modindex

•   search

AUTHOR
Author

COPYRIGHT
2017 DESY, Jan Kotanski <jkotan@mail.desy.de>, Christoph Rosemann <christoph.rosemann@desy.de> GNU GENERAL PUBLIC LICENSE, version 2