Issue with wx.dc.DrawText()

wxPython Users
1

I have some code for drawing labels with transparent background:

def OnPaint(self, event):
    dc = wx.PaintDC(self)
    dc.SetBackgroundMode(wx.TRANSPARENT)
    font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
    dc.SetFont(font)
    dc.SetPen(self.pen)
    self.text2+='1'
    print self.text2
    dc.DrawText(self.text2, 0, 50)
    dc.DrawText('test', 0, 100)
    event.Skip()

I have a problem with first DrawText call. It never shows updated
string, just whatever it was on the start. Second one with static
string works as expected.

What I want to do is draw some text with color background behind some
characters but not the others.
Any suggestions much appreciated.

2

Have you verified that there is more than one paint event?

Please make a runnable, small as possible, sample application that demonstrates the problem, and let us know the platform and wx version. MakingSampleApps - wxPyWiki

···

On 3/23/12 12:22 PM, piotr jastrzebski wrote:

I have some code for drawing labels with transparent background:

def OnPaint(self, event):
     dc = wx.PaintDC(self)
     dc.SetBackgroundMode(wx.TRANSPARENT)
     font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
     dc.SetFont(font)
     dc.SetPen(self.pen)
     self.text2+='1'
     print self.text2
     dc.DrawText(self.text2, 0, 50)
     dc.DrawText('test', 0, 100)
     event.Skip()

I have a problem with first DrawText call. It never shows updated
string, just whatever it was on the start. Second one with static
string works as expected.

What I want to do is draw some text with color background behind some
characters but not the others.
Any suggestions much appreciated.

--
Robin Dunn
Software Craftsman