[Pythoncard-users] Added MDI support to Pythoncard (was MDI - childwindows within a window)

[John H. <ec...@ya...>]

I am happy to let you know that I succeeded in adding MDI support to Pythoncard 
with only a few lines of modifications to the Background class in model.py

I made the Background class into a BackgroundBase class, and have the Background 
class subclass from the BackgroundBase class.  

Then I added a MDIParentBackground and MDIChildBackground which simply force 
Background to subclass from wxMDIParentFrame and wxMDIChildFrame respectively, 
instead of the wx.Frame class.   Once I've done that, wxPython does the rest of 
the work.

################ mod to model.py ######################

from wxPython.wx import wxMDIParentFrame, wxMDIChildFrame

# Used to say:
# class BackgroundBase(Scriptable, wx.Frame,  event.EventSource):
class BackgroundBase(Scriptable, event.EventSource):
    """
    A window that contains Widgets.
    """
    def __init__(self, aParent, aBgRsrc, frameclass=wx.Frame):
    ...<original code>...
#Changed original code from invoking wx.Frame here to a method passed down
        # First, call the base class' __init__ method to create the frame
        frameclass.__init__(self, aParent,
                            self.id, 
                            #self.name,
                            aBgRsrc.title,
                            position,
                            aBgRsrc.size,
                            style | wx.NO_FULL_REPAINT_ON_RESIZE,
                            aBgRsrc.name)
   ...<rest of original code>...


class Background(BackgroundBase, wx.Frame):
    def __init__(self, aParent, aBgRsrc):
        return BackgroundBase.__init__(self, aParent, aBgRsrc, 
frameclass=wx.Frame)

class MDIParentBackground(BackgroundBase, wxMDIParentFrame):
    def __init__(self, aParent, aBgRsrc):
        return BackgroundBase.__init__(self, aParent, aBgRsrc, 
frameclass=wxMDIParentFrame)

class MDIChildBackground(BackgroundBase, wxMDIChildFrame):
    def __init__(self, aParent, aBgRsrc):
        return BackgroundBase.__init__(self, aParent, aBgRsrc, 
frameclass=wxMDIChildFrame)
       
############## end of mod to model.py #########################

To use these two new classes, the code is remarkably unremarkable.  The parent 
code:

############# Parent ######################
#!/usr/bin/python

"""
__version__ = "$Revision: 1.5 $"
__date__ = "$Date: 2004/04/30 16:26:12 $"
"""

from PythonCard import model

MDI_rsrc=\
{'application':{'type':'Application',
          'name':'Template',
    'backgrounds': [
    {'type':'Background',
          'name':'bgTemplate',
          'title':'Testing MDI Controls',
          'size':(400, 300),
          'style':['resizeable'],

        'menubar': {'type':'MenuBar',
         'menus': [
             {'type':'Menu',
             'name':'menuFile',
             'label':'&File',
             'items': [
                  {'type':'MenuItem',
                   'name':'menuFileExit',
                   'label':'E&xit',
                   'command':'exit',
                  },
              ]
             },
             {'type':'Menu',
             'name':'menuOptions',
             'label':'Options',
             'items': [
                  {'type':'MenuItem',
                   'name':'menuOptionsOpenNew',
                   'label':'Open New\tAlt+N',
                   'command':'openNew',
                  },
              ]
             },
         ]
     },
         'components': [

] # end components
} # end background
] # end backgrounds
} }

MyCW_rsrc=\
{'application':{'type':'Application',
          'name':'Template',
    'backgrounds': [
    {'type':'Background',
          'name':'bgTemplate',
          'title':'Standard Template with File->Exit menu',
          'size':(698, 517),
          'style':['resizeable'],

        'menubar': {'type':'MenuBar',
         'menus': [
             {'type':'Menu',
             'name':'menuFile',
             'label':'&File',
             'items': [
                  {'type':'MenuItem',
                   'name':'menuFileExit',
                   'label':'E&xit',
                   'command':'exit',
                  },
              ]
             },
             {'type':'Menu',
             'name':'menuOptions',
             'label':'Options',
             'items': [
                  {'type':'MenuItem',
                   'name':'menuOptionsOpenNew',
                   'label':'Open New\tAlt+N',
                   'command':'openNew',
                  },
              ]
             },
         ]
     },
         'components': [

{'type':'TextArea', 
    'name':'TextArea1', 
    'position':(20, 20), 
    'size':(651, 333), 
    },

{'type':'Button', 
    'name':'Button1', 
    'position':(559, 376), 
    'label':'Button1', 
    },

] # end components
} # end background
] # end backgrounds
} }

class MyBackground(model.MDIParentBackground):

def on_initialize(self, event):
# if you have any initialization
# including sizer setup, do it here
#MDI.on_initialize(self, event)
pass
def on_openNew_command ( self, event ):
# Create a child window
child = model.childWindow(self, MyCW, rsrc=MyCW_rsrc)

if __name__ == '__main__':
app = model.Application(MyBackground, None, MDI_rsrc)
app.MainLoop()
############# End of Parent ######################

############# Child ######################
class MyCW(model.MDIChildBackground):

   def on_initialize(self, event):
      self.parent = self.getParent()
      self.components.TextArea1.text='I am only a child.'
   def on_openNew_command ( self, event ):
      return self.parent.on_openNew_command ( event )
############# End of Child ######################

That's it!!!  

Now I have to play around with resizer to see how that would work here.

 --
John Henry