RE: [Boa Constr] newbie question -- using Boa for creating a drawing canvas

[John B. <joh...@om...>]

Hello Riaan, John, and all.  The wraparound for the wxShapeCanvas widget
still seems to have one problem in it.  I created the custom canvas, as we
discussed, but it does not seem to handle mouse events.  Using wxBell() as a
test, I can get a mousedown event to ring the bell on a regular wxPanel, but
on the new canvas it causes python to crash.  No message is given, just a
python crash.  The applicable code is:

class wxBoaShapeCanvas(wxShapeCanvas):
    def __init__(self, parent=NULL, id=-1, pos=wxPoint(224, 16),
          size=wxSize(200, 304), style=wxBORDER, name='shapecanvas'):

        wxShapeCanvas.__init__(self, parent, id, pos, size, style)
        self.SetName(name)
-------------------------------

class wxFrame1(wxFrame):
    _custom_classes = {'wxScrolledWindow': ['wxBoaShapeCanvas']}

    def _init_ctrls(self, prnt):
        wxFrame.__init__(self, id = wxID_WXFRAME1, name = '', parent = prnt,
pos = wxPoint(353, 110), size = wxSize(484, 424), style =
wxDEFAULT_FRAME_STYLE, title = 'wxFrame1')
        self._init_utils()
        self.SetClientSize(wxSize(476, 397))

        self.panel1 = wxPanel(id = wxID_WXFRAME1PANEL1, name = 'panel1',
parent = self, pos = wxPoint(8, 0), size = wxSize(176, 384), style =
wxTAB_TRAVERSAL)
        self.panel1.SetForegroundColour(wxColour(255, 128, 255))
        self.panel1.SetBackgroundColour(wxColour(0, 255, 0))
        EVT_LEFT_DOWN(self.panel1, self.OnPanel1LeftDown)

        self.scrolledWindow1 = wxBoaShapeCanvas(id =
wxID_WXFRAME1SCROLLEDWINDOW1, name = 'scrolledWindow1', parent = self, pos =
wxPoint(216, 16), size = wxSize(232, 368), style = wxTAB_TRAVERSAL)
        self.scrolledWindow1.SetForegroundColour(wxColour(128, 0, 255))
        self.scrolledWindow1.SetBackgroundColour(wxColour(0, 0, 255))
        EVT_LEFT_DOWN(self.scrolledWindow1, self.OnScrolledwindow1LeftDown)

-----------------------------------
    def OnScrolledwindow1LeftDown(self, event):
        wxBell()
------------------------------

Actually, the bell goes off and then Python crashes.  Again, I am using Win
XP.  Any ideas as to why this might be occuring?  I am stumped.  I can,
however, place a static bitmap on the canvas.  That seems to work just fine.

John

John Boik
Oregon Medical Press
www.ompress.com
joh...@om...