wxpython: adding panel to wx.Frame disables/conflicts with wx.Frame's OnPaint?!
- by sdaau
Hi all,
I just encountered this strange situation: I found an example, where wx.Frame's OnPaint is overridden, and a circle is drawn. Funnily, as soon as I add even a single panel to the frame, the circle is not drawn anymore - in fact, OnPaint is not called at all anymore !
Can anyone explain me if this is the expected behavior, and how to correctly handle a wx.Frame's OnPaint, if the wx.Frame has child panels ? Small code example is below..
Thanks in advance for any answers,
Cheers!
The code:
#!/usr/bin/env python
# http://www.linuxquestions.org/questions/programming-9/wxwidgets-wxpython-drawing-problems-with-onpaint-event-703946/
import wx
class MainWindow(wx.Frame):
def __init__(self, parent, title, size=wx.DefaultSize):
wx.Frame.__init__(self, parent, wx.ID_ANY, title, wx.DefaultPosition, size)
self.circles = list()
self.displaceX = 30
self.displaceY = 30
circlePos = (self.displaceX, self.displaceY)
self.circles.append(circlePos)
## uncommenting either only first, or both of
## the commands below, causes OnPaint *not* to be called anymore!
#~ self.panel = wx.Panel(self, wx.ID_ANY)
#~ self.mpanelA = wx.Panel(self.panel, -1, size=(200,50))
self.Bind(wx.EVT_PAINT, self.OnPaint)
def OnPaint(self, e):
print "OnPaint called"
dc = wx.PaintDC(self)
dc.SetPen(wx.Pen(wx.BLUE))
dc.SetBrush(wx.Brush(wx.BLUE))
# Go through the list of circles to draw all of them
for circle in self.circles:
dc.DrawCircle(circle[0], circle[1], 10)
def main():
app = wx.App()
win = MainWindow(None, "Draw delayed circles", size=(620,460))
win.Show()
app.MainLoop()
if __name__ == "__main__":
main()
