wxPython/demo/ImageAlpha.py

   1
   2 import wx                  # This module uses the new wx namespace
   3 from Main import opj
   4
   5
   6 #----------------------------------------------------------------------
   7
   8 msg = "This is some text that will appear behind the image..."
   9
  10 class TestPanel(wx.Panel):
  11     def __init__(self, parent, log):
  12         self.log = log
  13         wx.Panel.__init__(self, parent, -1)
  14
  15         self.Bind(wx.EVT_PAINT, self.OnPaint)
  16
  17
  18     def OnPaint(self, evt):
  19         dc = wx.PaintDC(self)
  20         dc.SetBackground(wx.Brush("WHITE"))
  21         dc.Clear()
  22
  23         dc.SetFont(wx.Font(16, wx.SWISS, wx.NORMAL, wx.BOLD, True))
  24         dc.DrawText("Bitmap alpha blending (on wxMSW and wxMac)",
  25                     (25,25))
  26
  27         bmp = wx.Bitmap(opj('bitmaps/toucan.png'))
  28         dc.DrawBitmap(bmp, (25,100), True)
  29
  30         dc.SetFont(self.GetFont())
  31         y = 75
  32         for line in range(10):
  33             y += dc.GetCharHeight() + 5
  34             dc.DrawText(msg, (200, y))
  35         dc.DrawBitmap(bmp, (250,100), True)
  36
  37
  38
  39 #----------------------------------------------------------------------
  40
  41 def runTest(frame, nb, log):
  42     win = TestPanel(nb, log)
  43     return win
  44
  45 #----------------------------------------------------------------------
  46
  47
  48
  49 overview = """<html><body>
  50 <h2><center>Images with Alpha</center></h2>
  51
  52 wxMSW and wxMac now support alpha channels of supported image
  53 types, and will properly blend that chennel when drawing a
  54 bitmap.  It is not supported yet on wxGTK, (if you would like to
  55 change that please submit a patch!)
  56
  57 </body></html>
  58 """
  59
  60
  61
  62 if __name__ == '__main__':
  63     import sys,os
  64     import run
  65     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
  66