projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 51aad6d3 RD |
1 | |
| 2 | import wx | |
| 3 | import colorsys | |
| 4 | from math import cos, sin, radians | |
| 5 | ||
| 6 | #---------------------------------------------------------------------- | |
| 7 | ||
| 8 | BASE = 80.0 # sizes used in shapes drawn below | |
| 9 | BASE2 = BASE/2 | |
| 10 | BASE4 = BASE/4 | |
| 11 | ||
| 12 | ||
| 13 | class TestPanel(wx.Panel): | |
| 14 | def __init__(self, parent, log): | |
| 15 | self.log = log | |
| 16 | wx.Panel.__init__(self, parent, -1) | |
| 17 | ||
| 18 | self.Bind(wx.EVT_PAINT, self.OnPaint) | |
| 19 | ||
| 20 | def OnPaint(self, evt): | |
| 21 | dc = wx.PaintDC(self) | |
| 22 | gc = wx.GraphicsContext.Create(dc) | |
| 23 | ||
| 24 | font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT) | |
| 25 | font.SetWeight(wx.BOLD) | |
| 26 | gc.SetFont(font) | |
| 27 | ||
| 28 | # make a path that contains a circle and some lines, centered at 0,0 | |
| 29 | path = gc.CreatePath() | |
| 30 | path.AddCircle(0, 0, BASE2) | |
| 31 | path.MoveToPoint(0, -BASE2) | |
| 32 | path.AddLineToPoint(0, BASE2) | |
| 33 | path.MoveToPoint(-BASE2, 0) | |
| 34 | path.AddLineToPoint(BASE2, 0) | |
| 35 | path.CloseSubpath() | |
| 36 | path.AddRectangle(-BASE4, -BASE4/2, BASE2, BASE4) | |
| 37 | ||
| 38 | ||
| 39 | # Now use that path to demonstrate various capbilites of the grpahics context | |
| 40 | gc.PushState() # save current translation/scale/other state | |
| 41 | gc.Translate(60, 75) # reposition the context origin | |
| 42 | ||
| 43 | gc.SetPen(wx.Pen("navy", 1)) | |
| 44 | gc.SetBrush(wx.Brush("pink")) | |
| 45 | gc.SetTextColour("black") | |
| 46 | ||
| 47 | # show the difference between stroking, filling and drawing | |
| 48 | for label, PathFunc in [("StrokePath", gc.StrokePath), | |
| 49 | ("FillPath", gc.FillPath), | |
| 50 | ("DrawPath", gc.DrawPath)]: | |
| 51 | if "wxGTK" in wx.PlatformInfo: | |
| 52 | w, h = dc.GetTextExtent(label) # NYI in Cairo context | |
| 53 | else: | |
| 54 | w, h = gc.GetTextExtent(label) | |
| 55 | ||
| 56 | gc.DrawText(label, -w/2, -BASE2-h) | |
| 57 | PathFunc(path) | |
| 58 | gc.Translate(2*BASE, 0) | |
| 59 | ||
| 60 | ||
| 61 | gc.PopState() # restore saved state | |
| 62 | gc.PushState() # save it again | |
| 63 | gc.Translate(60, 200) # offset to the lower part of the window | |
| 64 | ||
| 65 | gc.DrawText("Scale", 0, -BASE2) | |
| 66 | gc.Translate(0, 20) | |
| 67 | ||
| 68 | gc.SetBrush(wx.Brush(wx.Colour(178, 34, 34, 128))) # 128 == half transparent | |
| 69 | for cnt in range(8): | |
| 70 | gc.Scale(1.08, 1.08) # increase scale by 8% | |
| 71 | gc.Translate(5,5) | |
| 72 | gc.DrawPath(path) | |
| 73 | ||
| 74 | ||
| 75 | gc.PopState() # restore saved state | |
| 76 | gc.PushState() # save it again | |
| 77 | gc.Translate(400, 200) | |
| 78 | gc.DrawText("Rotate", 0, -BASE2) | |
| 79 | ||
| 80 | gc.Translate(0, 75) | |
| 81 | for angle in range(0, 360, 30): | |
| 82 | gc.PushState() # save this new current state so we can pop back to | |
| 83 | # it at the end of the loop | |
| 84 | r, g, b = [int(c * 255) for c in colorsys.hsv_to_rgb(float(angle)/360, 1, 1)] | |
| 85 | gc.SetBrush(wx.Brush(wx.Colour(r, g, b, 64))) | |
| 86 | ||
| 87 | # use translate to artfully reposition each drawn path | |
| 88 | gc.Translate(1.5 * BASE2 * cos(radians(angle)), | |
| 89 | 1.5 * BASE2 * sin(radians(angle))) | |
| 90 | ||
| 91 | # use Rotate to rotate the path | |
| 92 | gc.Rotate(radians(angle)) | |
| 93 | ||
| 94 | # now draw it | |
| 95 | gc.DrawPath(path) | |
| 96 | gc.PopState() | |
| 97 | ||
| 98 | gc.PopState() | |
| 99 | ||
| 100 | ||
| 101 | #---------------------------------------------------------------------- | |
| 102 | ||
| 103 | def runTest(frame, nb, log): | |
| 104 | win = TestPanel(nb, log) | |
| 105 | return win | |
| 106 | ||
| 107 | #---------------------------------------------------------------------- | |
| 108 | ||
| 109 | ||
| 110 | ||
| 111 | overview = """<html><body> | |
| 112 | <h2><center>wx.GraphicsContext and wx.GraphicsPath</center></h2> | |
| 113 | ||
| 114 | The new advanced 2D drawing API is implemented via the | |
| 115 | wx.GraphicsContext and wx.GraphicsPath classes. They wrap GDI+ on | |
| 116 | Windows, Cairo on wxGTK and CoreGraphics on OS X. They allow | |
| 117 | path-based drawing with alpha-blending and anti-aliasing, and use a | |
| 118 | floating point cooridnate system. | |
| 119 | ||
| 120 | <p>When viewing this sample pay attention to how the rounded edges are | |
| 121 | smoothed with anti-aliased drawing, and how the shapes on the lower | |
| 122 | half of the window are partially transparent, allowing you to see what | |
| 123 | was drawn before. | |
| 124 | ||
| 125 | </body></html> | |
| 126 | """ | |
| 127 | ||
| 128 | ||
| 129 | ||
| 130 | if __name__ == '__main__': | |
| 131 | import sys,os | |
| 132 | import run | |
| 133 | run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:]) | |
| 134 |