+This version of PyColourChooser is open source; you can redistribute it and/or
+modify it under the terms listed in the file COPYING.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+"""
+# 12/14/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o 2.5 compatability update.
+#
+# 12/21/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o wxPyColorChooser -> PyColorChooser
+# o wxPyColourChooser -> PyColourChooser
+# o Commented out wx.InitAllImageHandlers() (see comments at that
+# point for explanation
+#
+
+import cStringIO
+import zlib
+
+import wx
+
+import canvas
+import colorsys
+
+
+# Bitmap functions generated from img2py
+def getData():
+ return zlib.decompress(
+'x\xdaUV{<\x93{\x18\x1f:\xe3\xc8Xj\xa3a\xe6R\x9db*B.3\x93\xeb\xe9\x1c\xb7\
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+\xe1,\xb7\xc2\x8a\xd0\x99D\xc8t\xdc\x86r\x1f\x96\\\x16k:\xebC\xe78\xef\xe7\
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+\x1b\xe6\xb7\tF\xca\t`\xef\xf9\xb5\xa2\x87\xe1\x8d\xd3\x8ft\xef\x06z\xa5\x8f\
+\xd7\x04\xf6y\xaf\xfbT\x0e\xad~\xce\xf1E\xa7\xc7\xe9\r\x8c\xab\xb7\xad_\xe4/\
+r\xf9\xb1\xbe\x97[\xb3\x88\xfcx\xd6\\\xdf\x15\x88\xca\xcc\xc0\xb0\x10\xef\
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+\xcc\xc4\x11YI\xbfx\n@y\x04\x01\x00\nL\xd8\xb3#\xfa\x0e\'\xb7\xc1n\x98\xd3h\
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+\xc5\x8e\x1a\xd5\x84\x8b\x7f\x8f\x01\x0e6\x8e\xd6eV~W\xff\x01[x\x1b=' )
+
+def getBitmap():
+ return wx.BitmapFromImage(getImage())
+
+def getImage():
+ stream = cStringIO.StringIO(getData())
+ return wx.ImageFromStream(stream)
+
+class PyPalette(canvas.Canvas):
+ """The Pure-Python Palette
+
+ The PyPalette is a pure python implementation of a colour palette. The
+ palette implementation here imitates the palette layout used by MS
+ Windows and Adobe Photoshop.
+
+ The actual palette image has been embedded as an XPM for speed. The
+ actual reverse-engineered drawing algorithm is provided in the
+ GeneratePaletteBMP() method. The algorithm is tweakable by supplying
+ the granularity factor to improve speed at the cost of display
+ beauty. Since the generator isn't used in real time, no one will
+ likely care :) But if you need it for some sort of unforeseen realtime
+ application, it's there.
+ """
+
+ HORIZONTAL_STEP = 2
+ VERTICAL_STEP = 4
+
+ def __init__(self, parent, id):
+ """Creates a palette object."""
+ # Load the pre-generated palette XPM
+
+ # Leaving this in causes warning messages in some cases.
+ # It is the responsibility of the app to init the image
+ # handlers, IAW RD
+ #wx.InitAllImageHandlers()
+
+ self.palette = getBitmap ()
+ canvas.Canvas.__init__ (self, parent, id, size=(200, 192))
+
+ def GetValue(self, x, y):
+ """Returns a colour value at a specific x, y coordinate pair. This
+ is useful for determining the colour found a specific mouse click
+ in an external event handler."""
+ return self.buffer.GetPixel(x, y)
+
+ def DrawBuffer(self):
+ """Draws the palette XPM into the memory buffer."""
+ #self.GeneratePaletteBMP ("foo.bmp")
+ self.buffer.DrawBitmap(self.palette, 0, 0, 0)
+
+ def HighlightPoint(self, x, y):
+ """Highlights an area of the palette with a little circle around
+ the coordinate point"""
+ colour = wx.Colour(0, 0, 0)
+ self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
+ self.buffer.SetBrush(wx.Brush(colour, wx.TRANSPARENT))
+ self.buffer.DrawCircle(x, y, 3)
+ self.Refresh()
+
+ def GeneratePaletteBMP(self, file_name, granularity=1):
+ """The actual palette drawing algorithm.
+
+ This used to be 100% reverse engineered by looking at the
+ values on the MS map, but has since been redone Correctly(tm)
+ according to the HSV (hue, saturation, value) colour model by
+ Charl P. Botha <http://cpbotha.net/>.
+
+ Speed is tweakable by changing the granularity factor, but
+ that affects how nice the output looks (makes the vertical
+ blocks bigger. This method was used to generate the embedded
+ XPM data."""
+ self.vertical_step = self.VERTICAL_STEP * granularity
+ width, height = self.GetSize ()
+
+ # simply iterate over hue (horizontal) and saturation (vertical)
+ value = 1.0
+ for y in range(0, height, self.vertical_step):
+ saturation = 1.0 - float(y) / float(height)
+ for x in range(0, width, self.HORIZONTAL_STEP):
+ hue = float(x) / float(width)
+ r,g,b = colorsys.hsv_to_rgb(hue, saturation, value)
+ colour = wx.Colour(int(r * 255.0), int(g * 255.0), int(b * 255.0))
+ self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
+ self.buffer.SetBrush(wx.Brush(colour, wx.SOLID))
+ self.buffer.DrawRectangle(x, y,
+ self.HORIZONTAL_STEP, self.vertical_step)
+
+ # this code is now simpler (and works)
+ bitmap = self.buffer.GetBitmap()
+ image = wx.ImageFromBitmap(bitmap)
+ image.SaveFile (file_name, wx.BITMAP_TYPE_XPM)
projects / wxWidgets.git / blobdiff