| | 1 | |
| | 2 | import wx |
| | 3 | |
| | 4 | #---------------------------------------------------------------------- |
| | 5 | |
| | 6 | class TestPanel(wx.Panel): |
| | 7 | def __init__(self, parent, log): |
| | 8 | self.log = log |
| | 9 | wx.Panel.__init__(self, parent, -1) |
| | 10 | self.Bind(wx.EVT_PAINT, self.OnPaint) |
| | 11 | |
| | 12 | txt = """\ |
| | 13 | If this build of wxPython includes the new wx.GCDC class (which |
| | 14 | provides the wx.DC API on top of the new wx.GraphicsContext class) |
| | 15 | then these squares should be transparent. |
| | 16 | """ |
| | 17 | wx.StaticText(self, -1, txt, (20, 20)) |
| | 18 | |
| | 19 | |
| | 20 | def OnPaint(self, evt): |
| | 21 | pdc = wx.PaintDC(self) |
| | 22 | try: |
| | 23 | dc = wx.GCDC(pdc) |
| | 24 | except: |
| | 25 | dc = pdc |
| | 26 | rect = wx.Rect(0,0, 100, 100) |
| | 27 | for RGB, pos in [((178, 34, 34), ( 50, 90)), |
| | 28 | (( 35, 142, 35), (110, 150)), |
| | 29 | (( 0, 0, 139), (170, 90)) |
| | 30 | ]: |
| | 31 | r, g, b = RGB |
| | 32 | penclr = wx.Colour(r, g, b, wx.ALPHA_OPAQUE) |
| | 33 | brushclr = wx.Colour(r, g, b, 128) # half transparent |
| | 34 | dc.SetPen(wx.Pen(penclr)) |
| | 35 | dc.SetBrush(wx.Brush(brushclr)) |
| | 36 | rect.SetPosition(pos) |
| | 37 | dc.DrawRoundedRectangleRect(rect, 8) |
| | 38 | |
| | 39 | # some additional testing stuff |
| | 40 | #dc.SetPen(wx.Pen(wx.Colour(0,0,255, 196))) |
| | 41 | #dc.SetBrush(wx.Brush(wx.Colour(0,0,255, 64))) |
| | 42 | #dc.DrawCircle(50, 275, 25) |
| | 43 | #dc.DrawEllipse(100, 275, 75, 50) |
| | 44 | |
| | 45 | |
| | 46 | #---------------------------------------------------------------------- |
| | 47 | |
| | 48 | def runTest(frame, nb, log): |
| | 49 | win = TestPanel(nb, log) |
| | 50 | return win |
| | 51 | |
| | 52 | #---------------------------------------------------------------------- |
| | 53 | |
| | 54 | |
| | 55 | |
| | 56 | overview = """<html><body> |
| | 57 | <h2><center>Alpha Drawing</center></h2> |
| | 58 | |
| | 59 | The wx.GCDC class is a class that implemented the wx.DC API using the |
| | 60 | new wx.GraphicsContext class, and so it supports anti-aliased drawing |
| | 61 | using pens and brushes, that can optionally also be drawn using an |
| | 62 | alpha transparency. (On the Mac all the DC classes are using this new |
| | 63 | implementation.) This is accomplished by enabling the wx.Colour class |
| | 64 | to have a fourth component for the alpha value, where 0 is fully |
| | 65 | transparent, and 255 is fully opaque. |
| | 66 | |
| | 67 | </body></html> |
| | 68 | """ |
| | 69 | |
| | 70 | |
| | 71 | |
| | 72 | if __name__ == '__main__': |
| | 73 | import sys,os |
| | 74 | import run |
| | 75 | run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:]) |
| | 76 | |
projects / wxWidgets.git / blame_incremental