ecc0e221ee
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40860 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
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import wx
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#----------------------------------------------------------------------
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class TestPanel(wx.Panel):
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def __init__(self, parent, log):
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self.log = log
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wx.Panel.__init__(self, parent, -1)
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self.Bind(wx.EVT_PAINT, self.OnPaint)
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self.redBmp = self.MakeBitmap(188, 143, 234)
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self.greenBmp = self.MakeBitmap(35, 142, 35)
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self.blueBmp = self.MakeBitmap(50, 153, 204)
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def MakeBitmap(self, red, green, blue, alpha=128):
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bmp = wx.EmptyBitmap(100, 100, 32)
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# Create an object that facilitates access to the bitmap's
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# pixel buffer
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pixelData = wx.AlphaPixelData(bmp)
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if not pixelData:
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raise RuntimeError("Failed to gain raw access to bitmap data.")
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# We have two ways to access each pixel, first we'll use an
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# iterator to set every pixel to the colour and alpha values
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# passed in.
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for pixel in pixelData:
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pixel.Set(red, green, blue, alpha)
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# Next we'll use the pixel accessor to draw a border
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pixels = pixelData.GetPixels()
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for x in xrange(100):
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pixels.MoveTo(pixelData, x, 0)
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pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
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pixels.MoveTo(pixelData, x, 99)
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pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
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for y in xrange(100):
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pixels.MoveTo(pixelData, 0, y)
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pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
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pixels.MoveTo(pixelData, 99, y)
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pixels.Set(red, green, blue, wx.ALPHA_OPAQUE)
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return bmp
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def OnPaint(self, evt):
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dc = wx.PaintDC(self)
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dc.DrawBitmap(self.redBmp, 50, 50, True)
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dc.DrawBitmap(self.greenBmp, 110, 110, True)
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dc.DrawBitmap(self.blueBmp, 170, 50, True)
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#----------------------------------------------------------------------
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def runTest(frame, nb, log):
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win = TestPanel(nb, log)
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return win
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#----------------------------------------------------------------------
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overview = """<html><body>
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<h2><center>Raw Bitmap Access</center></h2>
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wx.NativePixelData and wx.AlphaPixelData provide a cross-platform way
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to access the platform-specific pixel buffer within a wx.Bitmap. They
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provide both a random access method, and an iterator interface.
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</body></html>
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"""
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if __name__ == '__main__':
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import sys,os
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import run
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run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
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