import wx #---------------------------------------------------------------------- class TestPanel(wx.Panel): def __init__(self, parent, log): self.log = log wx.Panel.__init__(self, parent, -1) wx.StaticText(self, -1, "On the Mac these squares should be transparent,\n" "if the CoreGrahics option is turned on.", (20, 20)) self.Bind(wx.EVT_PAINT, self.OnPaint) def OnPaint(self, evt): dc = wx.PaintDC(self) rect = wx.Rect(0,0, 100, 100) for RGB, pos in [((178, 34, 34), ( 50, 70)), (( 35, 142, 35), (110, 130)), (( 0, 0, 139), (170, 70)) ]: r, g, b = RGB penclr = wx.Colour(r, g, b, wx.ALPHA_OPAQUE) brushclr = wx.Colour(r, g, b, 128) # half transparent dc.SetPen(wx.Pen(penclr)) dc.SetBrush(wx.Brush(brushclr)) rect.SetPosition(pos) dc.DrawRectangleRect(rect) #---------------------------------------------------------------------- def runTest(frame, nb, log): win = TestPanel(nb, log) return win #---------------------------------------------------------------------- overview = """

Alpha Drawing

The wx.DC on Mac now supports alpha transparent drawing using pens and brushes. This is accomplished by enabling the wx.Colour class to have a fourth component for the alpha value, where 0 is fully transparent, and 255 is fully opaque. """ if __name__ == '__main__': import sys,os import run run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])