AWESOME!! Got it, there is a world of difference in performance now!
Thank you very much Alex.
-Cole
Cole Harris
Enterasys Networks
Phone: 978-684-1652
Email: coharris@enterasys.com
www. http://www.enterasys.com
···
-----Original Message-----
From: Alex Tweedly [mailto:alex@tweedly.net]
Sent: Thursday, September 01, 2005 4:22 PM
To: wxPython-users@lists.wxwidgets.org
Subject: Re: [wxPython-users] draw a line to cursor
Harris, Cole wrote:
Alex,
Thanks for the help, I added your code but it is not working properly.
I can see that it somewhat erases the lines but many are still drawn
just opaquely. Does that make sense? I pretty much just added your
code.
Doesn't really make sense to me. It sounds like maybe you're not
undrawing it properly; you need to be sure that on each movement, if you
have a previously drawn line, that you "undraw" it with the old co-ords,
then draw (and remember) the new line to the new mouse coords.
Here's some sample code (unfortunately, in PythonCard rather than raw
wxPython - it would take me a while to convert it to raw wxPython, but
hopefully it is clear enough ...)
class MyBackground(model.Background):
def on_initialize(self, event):
self.rootX, self.rootY = None, None
dc = wx.ClientDC(self.components.BitmapCanvas1)
dc.SetPen(wx.Pen('black', 1, wx.DOT))
dc.SetBrush(wx.TRANSPARENT_BRUSH)
dc.SetLogicalFunction(wx.INVERT)
self.dc = dc
self.banding = False
def on_BitmapCanvas1_mouseUp(self, event):
print event.x, event.y
self.rootX, self.rootY = event.x, event.y
self.lastX, self.lastY = self.rootX, self.rootY
self.banding = True
def on_BitmapCanvas1_mouseMove(self, event):
if self.banding:
if self.lastX <> self.rootX or self.lastY <> self.rootY:
# undraw last one
self.dc.DrawLine(self.rootX, self.rootY, self.lastX,
self.lastY)
self.lastX, self.lastY = event.x, event.y
self.dc.DrawLine(self.rootX, self.rootY, self.lastX,
self.lastY)
--
Alex Tweedly http://www.tweedly.net
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