wxPython/tests/test_gc.py

   1 import wx
   2
   3 class TestPanel(wx.Panel):
   4     def __init__(self, *args, **kw):
   5         wx.Panel.__init__(self, *args, **kw)
   6         self.Bind(wx.EVT_PAINT, self.OnPaint)
   7
   8     def OnPaint(self, evt):
   9         gc = wx.GraphicsContext.Create(wx.PaintDC(self))
  10
  11         pen = wx.Pen("navy", 2)
  12         gc.SetPen(pen)
  13         brush = wx.Brush((255,32,32,128))
  14         gc.SetBrush(brush)
  15         gc.PushState()
  16
  17         path = gc.CreatePath()
  18         path.MoveToPoint(50, 50)
  19         path.AddLineToPoint(25,25)
  20         path.AddLineToPoint(50,25)
  21         path.AddLineToPoint(50,50)
  22         path.CloseSubpath()
  23
  24         gc.DrawPath(path)
  25
  26         gc.Scale(2,2)
  27         gc.Translate(10,5)
  28         gc.DrawPath(path)
  29
  30         gc.Translate(50,0)
  31         gc.FillPath(path)
  32         gc.Translate(0,5)
  33         gc.StrokePath(path)
  34         gc.Translate(0,5)
  35
  36         brush = wx.Brush((32,32,255,128))
  37         gc.SetBrush(brush)
  38
  39         gc.FillPath(path)
  40         gc.Translate(50,0)
  41         gc.DrawPath(path)
  42
  43         gc.PopState()
  44
  45         points = [ (5.2, 5.9),
  46                    (50, 50),
  47                    (35, 50),
  48                    (25,40),
  49                    wx.Point2D(20.5,50.9),
  50                    wx.Point2D(5,25),
  51                    (5,6)
  52                    ]
  53
  54         gc.Translate(0, 150)
  55         gc.DrawLines(points)
  56         gc.Translate(75, 0)
  57         gc.StrokeLines(points)
  58
  59
  60         begin = [ (0,0),
  61                   (0,10),
  62                   (0,20),
  63                   (0,30),
  64                   (0,40),
  65                   (0,50),
  66                   ]
  67
  68         end   = [ (50,0),
  69                   (50,10),
  70                   (50,20),
  71                   (50,30),
  72                   (50,40),
  73                   (50,50),
  74                   ]
  75
  76         # in a floating point coordinate system the center of the
  77         # pixel is actually at x+0.5, y+0.5, so with anti-aliasing
  78         # turned on we'll get a crisper line by positioning our line
  79         # segments at the 0.5 offset.  For this test we'll just let
  80         # the GC do the translation for us.
  81         gc.Translate(0.5, 0.5)
  82
  83         pen = wx.Pen("purple", 1)
  84         gc.SetPen(pen)
  85
  86         gc.Translate(75, 0)
  87         gc.StrokeLineSegements(begin, end)
  88
  89         gc.Translate(75, 0)
  90         gc.Scale(2,2)
  91         gc.StrokeLineSegements(begin, end)
  92         gc.DrawLines(points)
  93
  94         del path
  95
  96
  97 app = wx.App(False)
  98 frm = wx.Frame(None)
  99 pnl = TestPanel(frm)
 100 frm.Show()
 101 app.MainLoop()