wxPython/demo/Mask.py

   1
   2 import  wx
   3
   4 #----------------------------------------------------------------------
   5
   6 logicList = [
   7     ('wx.AND', wx.AND),
   8     ('wx.AND_INVERT', wx.AND_INVERT),
   9     ('wx.AND_REVERSE', wx.AND_REVERSE),
  10     ('wx.CLEAR', wx.CLEAR),
  11     ('wx.COPY', wx.COPY),
  12     ('wx.EQUIV', wx.EQUIV),
  13     ('wx.INVERT', wx.INVERT),
  14     ('wx.NAND', wx.NAND),
  15
  16     # this one causes an assert on wxGTK, and doesn't seem to
  17     # do much on MSW anyway, so I'll just take it out....
  18     #('wxNOR', wxNOR),
  19
  20     ('wx.NO_OP', wx.NO_OP),
  21     ('wx.OR', wx.OR),
  22     ('wx.OR_INVERT', wx.OR_INVERT),
  23     ('wx.OR_REVERSE', wx.OR_REVERSE),
  24     ('wx.SET', wx.SET),
  25     ('wx.SRC_INVERT', wx.SRC_INVERT),
  26     ('wx.XOR', wx.XOR),
  27 ]
  28
  29 import images
  30
  31 class TestMaskWindow(wx.ScrolledWindow):
  32     def __init__(self, parent):
  33         wx.ScrolledWindow.__init__(self, parent, -1)
  34         self.SetBackgroundColour(wx.Colour(0,128,0))
  35
  36         # A reference bitmap that we won't mask
  37         self.bmp_nomask  = images.getTestStar2Bitmap()
  38
  39         # One that we will
  40         self.bmp_withmask  = images.getTestStar2Bitmap()
  41
  42         # this mask comes from a monochrome bitmap
  43         self.bmp_themask = wx.BitmapFromImage(images.getTestMaskImage(), 1)
  44         mask = wx.Mask(self.bmp_themask)
  45
  46         # set the mask on our bitmap
  47         self.bmp_withmask.SetMask(mask)
  48
  49         # Now we'll create a mask in a bit of an easier way, by picking a
  50         # colour in the image that is to be the transparent colour.
  51         self.bmp_withcolourmask  = images.getTestStar2Bitmap()
  52         mask = wx.MaskColour(self.bmp_withcolourmask, wx.WHITE)
  53         self.bmp_withcolourmask.SetMask(mask)
  54
  55         self.SetScrollbars(20, 20, 700/20, 460/20)
  56
  57         self.Bind(wx.EVT_PAINT, self.OnPaint)
  58
  59
  60     def OnPaint (self, e):
  61         dc = wx.PaintDC(self)
  62         self.PrepareDC(dc)
  63         dc.SetTextForeground(wx.WHITE)
  64
  65         # make an interesting background...
  66         dc.SetPen(wx.MEDIUM_GREY_PEN)
  67         for i in range(100):
  68             dc.DrawLine((0,i*10), (i*10,0))
  69
  70         # draw raw image, mask, and masked images
  71         dc.DrawText('original image', (0,0))
  72         dc.DrawBitmap(self.bmp_nomask, (0,20), 0)
  73         dc.DrawText('with colour mask', (0,100))
  74         dc.DrawBitmap(self.bmp_withcolourmask, (0,120), 1)
  75         dc.DrawText('the mask image', (0,200))
  76         dc.DrawBitmap(self.bmp_themask, (0,220), 0)
  77         dc.DrawText('masked image', (0,300))
  78         dc.DrawBitmap(self.bmp_withmask, (0,320), 1)
  79
  80         cx,cy = self.bmp_themask.GetWidth(), self.bmp_themask.GetHeight()
  81
  82         # draw array of assorted blit operations
  83         mdc = wx.MemoryDC()
  84         i = 0
  85
  86         for text, code in logicList:
  87             x,y = 120+150*(i%4), 20+100*(i/4)
  88             dc.DrawText(text, (x, y-20))
  89             mdc.SelectObject(self.bmp_withcolourmask)
  90             dc.Blit((x,y), (cx,cy), mdc, (0,0), code, True)
  91             i = i + 1
  92
  93
  94 # On wxGTK there needs to be a panel under wx.ScrolledWindows if they are
  95 # going to be in a wxNotebook...
  96 class TestPanel(wx.Panel):
  97     def __init__(self, parent, ID):
  98         wx.Panel.__init__(self, parent, ID)
  99         self.win = TestMaskWindow(self)
 100         self.Bind(wx.EVT_SIZE, self.OnSize)
 101
 102     def OnSize(self, evt):
 103         self.win.SetSize(evt.GetSize())
 104
 105
 106 #----------------------------------------------------------------------
 107
 108 def runTest(frame, nb, log):
 109     win = TestPanel(nb, -1)
 110     return win
 111
 112 #----------------------------------------------------------------------
 113
 114
 115 overview = """\
 116 This class encapsulates a monochrome mask bitmap, where the masked area is black
 117 and the unmasked area is white. When associated with a bitmap and drawn in a device
 118 context, the unmasked area of the bitmap will be drawn, and the masked area will
 119 not be drawn.
 120
 121 This example shows not only how to create a Mask, but the effects of the Device
 122 Context (dc) <code>Blit()</code> method's logic codes.
 123 """
 124
 125
 126
 127 if __name__ == '__main__':
 128     import sys,os
 129     import run
 130     run.main(['', os.path.basename(sys.argv[0])])
 131