[Python.NET] Problem with toolbar

[Brian Lloyd]

Glad you're enjoying it :)

What you're seeing is almost always due to an exception being raised in the
Python callback (which has nowhere good to go in a windows app - need to
think about what to do there).

The first thing to try is replacing the body of your callback with just
'pass' or 'return'. Now, if you can click the thing that calls it w/o
getting
an error, you've verified that theres some prob with the Python code.

If so, 'the debugger is your friend', as Jim always tells me :) Put a
  import pdb
  pdb.set_trace()

...at the top of the callback method code and go from there.

Given the one-liner in your example, the only thing I can think of is
if MessageBox hasn't been defined as a name (maybe you need to
use the fully-qualified name or import that name explicitly?)

Hope this helps,



Brian Lloyd        brian at zope.com
V.P. Engineering   540.361.1716
Zope Corporation   http://www.zope.com


  -----Original Message-----
  From: pythondotnet-bounces at python.org
[mailto:pythondotnet-bounces at python.org]On Behalf Of Thane
  Sent: Thursday, January 08, 2004 6:21 PM
  To: pythondotnet at python.org
  Subject: [Python.NET] Problem with toolbar


  I think there's a bug in the toolbar event handler.  Here's the relevant
code:

  #-------------------------------------------------------
  class KtIde(WinForms.Form):
      """A simple Integrated Development Environment for Python.NET
      from Kokopelli Technology."""

      def __init__(self):
          # a bunch of stuff...

          # Add a toolbar
          self.toolBar1 = WinForms.ToolBar()
          self.imageList1 = WinForms.ImageList(self.components)
          self.toolBarButton1 = WinForms.ToolBarButton()
          self.toolBar1.Buttons.Add(self.toolBarButton1)
          self.toolBar1.ImageList = self.imageList1
          self.toolBar1.Location = Point(0, 30)
          self.toolBar1.Name = "toolBar1"
          self.toolBar1.ShowToolTips = True
          self.toolBar1.Size = Size(632, 28)
          self.toolBar1.TabIndex = 0
          #
          # Image list
          #
          self.imageList1.ImageSize = Size(16, 16)
          self.imageList1.TransparentColor = Color.Transparent
          fname = "ARW01RT.ICO"
          self.imageList1.Images.Add(Image.FromFile(fname))

          # toolBarButtons
          self.toolBarButton1.ImageIndex = 0

          ######################  PROBLEM  ########################
          self.toolBar1.ButtonClick += self.toolBar1_ButtonClick
          # Or is it...?
          #self.toolBar1.ButtonClick +=
WinForms.ToolBarButtonClickEventHandler(self.toolBar1_ButtonClick)
          ##########################################################

          # more stuff....

      def toolBar1_ButtonClick(self, sender, args):
          '''The toolbar event handler'''
          MessageBox.Show(args.ToString())
          #~ if args.Button == self.toolBarButton1:
              #~ MessageBox.Show("Hey, it works!")

  #-------------------------------------------------------

  This bombs every time I press the toolbar button -- unhandled exception.
Message is:
  ************** Exception Text **************
  Python.Runtime.PythonException: Exception of type
Python.Runtime.PythonException was thrown.
     at Python.Runtime.Dispatcher.Dispatch(ArrayList args)
     at
__System_Windows_Forms_ToolBarButtonClickEventHandlerDispatcher.Invoke(Objec
t , ToolBarButtonClickEventArgs )
     at
System.Windows.Forms.ToolBar.OnButtonClick(ToolBarButtonClickEventArgs e)
     at System.Windows.Forms.ToolBar.WmReflectCommand(Message& m)
     at System.Windows.Forms.ToolBar.WndProc(Message& m)
     at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
     at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
     at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)


  Any clues?

  Also, this is the most fun I've had programming in a LONG time.  MFC is
out the window.  Brian -- my hat is off to you.  Many thanks for your
efforts.

  Cheers,

  --Thane

  Thane Plummer
  CEO Magna Capital


  "La perfection est atteinte non quand il ne reste rien à ajouter, mais
quand il ne reste rien à enlever"
  Antoine de St. Exupery from The Little Prince  (perfection is reached not
when there's nothing left to add, but when there's nothing left to remove)

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