Help in wxpython

[Mike Driscoll]

On Dec 2, 10:05 pm, Krishnakant <hackin... at gmail.com> wrote:
> On Wed, 2009-12-02 at 00:20 -0800, madhura vadvalkar wrote:
> > Hi
>
> > I am trying to write an  PAINT like application where on the mouse
> > click a circle is drawn on canvas. I am new to python and using
> > wxpython to create this.
>
> > here is the code:
>
> > import wx
>
> > class SketchWindow(wx.Window):
>
> >     def __init__ (self, parent,ID):
>
> >         wx.Window.__init__(self, parent, ID)
>
> >         self.panel =wx.Panel(self, size= (350,350))
> >         self.pen=wx.Pen( 'blue',4)
> >         self.pos=(0,0)
> >         self.InitBuffer()
> >         self.Bind(wx.EVT_LEFT_DOWN,self.OnLeftDown)
>
> >     def InitBuffer(self):
>
> >         size=self.GetClientSize()
> >         self.Buffer=wx.EmptyBitmap(size.width,size.height)
> >         dc=wx.BufferedDC(None,self.buffer)
> >         dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
> >         dc.Clear()
> >         self.Drawcircle(dc)
> >         self.reInitBuffer=False
>
> >     def OnLeftDown(self,event):
> >         self.pos=event.GetPositionTuple()
> >         self.CaptureMouse()
>
> >     def Drawcircle(self,dc):
> >         pen=wx.Pen(colour,thickness,wx.SOLID)
> >         dc.SetPen(pen)
> >         dc.DrawCircle(self.pos.x,self.pos.y,r)
>
> > class SketchFrame(wx.Frame):
> >     def __init__(self, parent):
>
> >         wx.Frame.__init__(self, parent, -1, "Sketch Frame",size=(800,600))
> >         self.sketch = SketchWindow(self, -1)
>
> > if __name__=='__main__':
> >     app=wx.PySimpleApp()
> >     frame=SketchFrame(None)
> >     frame.Show(True)
> >     app.MainLoop()
>
> > I am getting the following error:
>
> > Traceback (most recent call last):
> >   File "C:/Python26/circle.py", line 42, in <module>
> >     frame=SketchFrame(None)
> >   File "C:/Python26/circle.py", line 38, in __init__
> >     self.sketch = SketchWindow(self, -1)
> >   File "C:/Python26/circle.py", line 12, in __init__
> >     self.InitBuffer()
> >   File "C:/Python26/circle.py", line 19, in InitBuffer
> >     dc=wx.BufferedDC(None,self.buffer)
> > AttributeError: 'SketchWindow' object has no attribute 'buffer'
>
> > Please tell me what I am doing wrong.
>
> > Thanks
>
> Madhura, Sorry to be a bit off-topic, but, I would really recommend you
> to use pygtk instead of wx.
> For one thing, the developers at pygtk are very active (they have their
> mailing list as well ) and it comes by default with python on almost all
> linux distros.  You can also easily install it on windows.


wxPython has some very active developers as well, but the core isn't
released all that often. I think this may be caused somewhat by the
slow release cycle of wx itself though.


>
> Most important, the api for pygtk is closely similar to wx.
> Not to mention the quick responses you will get with pygtk related
> problems.


The wxPython mailing list has very fast responses to questions as well
(most of the time)

-------------------
Mike Driscoll

Blog:   http://blog.pythonlibrary.org