#! /usr/env/python

"""
AppShell provides a GUI application framework.

This is a streamlined adaptation of GuiAppD.py, originally
created by Doug Hellmann (doughellmann@mindspring.com).

Pmw copyright

Copyright 1997-1999 Telstra Corporation Limited,
Australia Copyright 2000-2002 Really Good Software Pty Ltd, Australia

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

"""
from __future__ import absolute_import


from future import standard_library
standard_library.install_aliases()
from tkinter import *
try:
    from . import Pmw
    from . import ProgressBar
except:
    import Pmw
    import ProgressBar
import sys, string


class AppShell(Pmw.MegaWidget):
    appversion      = '1.0'
    appname         = 'ANUGA pmesh graphical editor'
    copyright       = 'Copyright ANU and Geoscience Australia. All Rights Reserved'
    contactname     = 'Stephen Roberts'
    contactphone    = '+61 2 6125 4445'
    contactemail    = 'stephen.roberts@anu.edu.au'

    frameWidth      = 450
    frameHeight     = 320
    padx            = 5
    pady            = 5
    usecommandarea  = 0
    balloonhelp     = 1

    busyCursor = 'watch'

    def __init__(self, **kw):
        optiondefs = (
            ('padx',           1,                   Pmw.INITOPT),
            ('pady',           1,                   Pmw.INITOPT),
            ('framewidth',     1,                   Pmw.INITOPT),
            ('frameheight',    1,                   Pmw.INITOPT),
            ('usecommandarea', self.usecommandarea, Pmw.INITOPT))
        self.defineoptions(kw, optiondefs)

        self.root = Tk()
        self.initializeTk(self.root)
        Pmw.initialise(self.root)
        self.root.title(self.appname)
        self.root.geometry('%dx%d' % (self.frameWidth, self.frameHeight))

        # Initialize the base class
        Pmw.MegaWidget.__init__(self, parent=self.root)

        # initialize the application
        self.appInit()

        # create the interface
        self.__createInterface()

        # create a table to hold the cursors for
        # widgets which get changed when we go busy
        self.preBusyCursors = None

        # pack the container and set focus
        # to ourselves
        self._hull.pack(side=TOP, fill=BOTH, expand=YES)
        self.focus_set()

        # initialize our options
        self.initialiseoptions(AppShell)

    def appInit(self):
        # Called before interface is created (should be overridden).
        pass

    def initializeTk(self, root):
        # Initialize platform-specific options
        if sys.platform == 'mac':
            self.__initializeTk_mac(root)
        elif sys.platform == 'win32':
            self.__initializeTk_win32(root)
        else:
            self.__initializeTk_unix(root)

    def __initializeTk_colors_common(self, root):
        root.option_add('*background', 'grey85')
        root.option_add('*foreground', 'black')
        root.option_add('*EntryField.Entry.background', 'white')
        root.option_add('*Entry.background', 'white')
        root.option_add('*MessageBar.Entry.background', 'gray85')
        root.option_add('*Listbox*background', 'white')
        root.option_add('*Listbox*selectBackground', 'dark slate blue')
        root.option_add('*Listbox*selectForeground', 'white')

    def __initializeTk_win32(self, root):
        self.__initializeTk_colors_common(root)
        root.option_add('*Font', 'Verdana 10 bold')
        root.option_add('*EntryField.Entry.Font', 'Courier 10')
        root.option_add('*Listbox*Font', 'Courier 10')

    def __initializeTk_mac(self, root):
        self.__initializeTk_colors_common(root)

    def __initializeTk_unix(self, root):
        self.__initializeTk_colors_common(root)

    def busyStart(self, newcursor=None):
        if not newcursor:
            newcursor = self.busyCursor
        newPreBusyCursors = {}
        for component in self.busyWidgets:
            newPreBusyCursors[component] = component['cursor']
            component.configure(cursor=newcursor)
            component.update_idletasks()
        self.preBusyCursors = (newPreBusyCursors, self.preBusyCursors)

    def busyEnd(self):
        if not self.preBusyCursors:
            return
        oldPreBusyCursors = self.preBusyCursors[0]
        self.preBusyCursors = self.preBusyCursors[1]
        for component in self.busyWidgets:
            try:
                component.configure(cursor=oldPreBusyCursors[component])
            except KeyError:
                pass
            component.update_idletasks()

    def __createAboutBox(self):
        Pmw.aboutversion(self.appversion)
        Pmw.aboutcopyright(self.copyright)
        Pmw.aboutcontact(
          'For more information, contact:\n %s\n Phone: %s\n Email: %s' %\
                      (self.contactname, self.contactphone,
                       self.contactemail))
        self.about = Pmw.AboutDialog(self._hull,
                                     applicationname=self.appname)
        self.about.withdraw()
        return None

    def showAbout(self):
        # Create the dialog to display about and contact information.
        self.about.show()
        self.about.focus_set()

    def toggleBalloon(self):
        if self.toggleBalloonVar.get():
            self.__balloon.configure(state = 'both')
        else:
            self.__balloon.configure(state = 'status')

    def __createMenuBar(self):
        self.menuBar = self.createcomponent('menubar', (), None,
                                            Pmw.MenuBar,
                                            (self._hull,),
                                            hull_relief=RAISED,
                                            hull_borderwidth=1,
                                            balloon=self.balloon())

        self.menuBar.pack(fill=X)
        self.menuBar.addmenu('Help', 'About %s' % self.appname, side='right')
        self.menuBar.addmenu('File', 'File commands and Quit')

    def createMenuBar(self):
        self.menuBar.addmenuitem('Help', 'command',
                                 'Get information on application',
                                 label='About...', command=self.showAbout)
        self.toggleBalloonVar = IntVar()
        self.toggleBalloonVar.set(1)
        self.menuBar.addmenuitem('Help', 'checkbutton',
                                 'Toggle balloon help',
                                 label='Balloon help',
                                 variable = self.toggleBalloonVar,
                                 command=self.toggleBalloon)

        self.menuBar.addmenuitem('File', 'command', 'Quit this application',
                                label='Quit',
                                command=self.quit)

    def __createBalloon(self):
        # Create the balloon help manager for the frame.
        # Create the manager for the balloon help
        self.__balloon = self.createcomponent('balloon', (), None,
                                              Pmw.Balloon, (self._hull,))

    def balloon(self):
        return self.__balloon

    def __createDataArea(self):
        # Create data area where data entry widgets are placed.
        self.dataArea = self.createcomponent('dataarea',
                                             (), None,
                                             Frame, (self._hull,),
                                             relief=GROOVE,
                                             bd=1)
        self.dataArea.pack(side=TOP, fill=BOTH, expand=YES,
                           padx=self['padx'], pady=self['pady'])

    def __createCommandArea(self):
        # Create a command area for application-wide buttons.
        self.__commandFrame = self.createcomponent('commandframe', (), None,
                                                   Frame,
                                                   (self._hull,),
                                                   relief=SUNKEN,
                                                   bd=1)
        self.__buttonBox = self.createcomponent('buttonbox', (), None,
                                                Pmw.ButtonBox,
                                                (self.__commandFrame,),
                                                padx=0, pady=0)
        self.__buttonBox.pack(side=TOP, expand=NO, fill=X)
        if self['usecommandarea']:
            self.__commandFrame.pack(side=TOP,
                                     expand=NO,
                                     fill=X,
                                     padx=self['padx'],
                                     pady=self['pady'])


    def __createMessageBar(self):
        # Create the message bar area for help and status messages.
        frame = self.createcomponent('bottomtray', (), None,
                                     Frame,(self._hull,), relief=SUNKEN)
        self.__messageBar = self.createcomponent('messagebar',
                                                  (), None,
                                                 Pmw.MessageBar,
                                                 (frame,),
                                                 #entry_width = 40,
                                                 entry_relief=SUNKEN,
                                                 entry_bd=1,
                                                 labelpos=None)
        self.__messageBar.pack(side=LEFT, expand=YES, fill=X)

        self.__progressBar = ProgressBar.ProgressBar(frame,
                                                fillColor='slateblue',
                                                doLabel=1,
                                                width=150)
        self.__progressBar.frame.pack(side=LEFT, expand=NO, fill=NONE)

        self.updateProgress(0)
        frame.pack(side=BOTTOM, expand=NO, fill=X)

        self.__balloon.configure(statuscommand = \
                                 self.__messageBar.helpmessage)

    def messageBar(self):
        return self.__messageBar

    def updateProgress(self, newValue=0, newMax=0):
        self.__progressBar.updateProgress(newValue, newMax)

    def bind(self, child, balloonHelpMsg, statusHelpMsg=None):
        # Bind a help message and/or status message to a widget.
        self.__balloon.bind(child, balloonHelpMsg, statusHelpMsg)

    def interior(self):
        # Retrieve the interior site where widgets should go.
        return self.dataArea

    def buttonBox(self):
        # Retrieve the button box.
        return self.__buttonBox

    def buttonAdd(self, buttonName, helpMessage=None,
                  statusMessage=None, **kw):
        # Add a button to the button box.
        newBtn = self.__buttonBox.add(buttonName)
        newBtn.configure(kw)
        if helpMessage:
             self.bind(newBtn, helpMessage, statusMessage)
        return newBtn

    def __createInterface(self):
        self.__createBalloon()
        self.__createMenuBar()
        self.__createDataArea()
        self.__createCommandArea()
        self.__createMessageBar()
        self.__createAboutBox()
        #
        # Create the parts of the interface
        # which can be modified by subclasses
        #
        self.busyWidgets = ( self.root, )
        self.createMenuBar()
        self.createInterface()

    def createInterface(self):
        # Override this method to create the interface for the app.
        pass

    def main(self):
        # This method should be left intact!
        self.pack()
        self.mainloop()

    def run(self):
        self.main()

class TestAppShell(AppShell):
        usecommandarea=1

        def createButtons(self):
                self.buttonAdd('Ok',
                        helpMessage='Exit',
                        statusMessage='Exit',
                        command=self.quit)

        def createMain(self):
                self.label = self.createcomponent('label', (), None,
                                        Label,
                                        (self.interior(),),
                                        text='Data Area')
                self.label.pack()
                self.bind(self.label, 'Space taker')

        def createInterface(self):
                AppShell.createInterface(self)
                self.createButtons()
                self.createMain()

if __name__ == '__main__':
        test = TestAppShell(balloon_state='both')
        test.run()
