wxPython/wx/lib/colourchooser/pypalette.py

   1 """
   2 PyColourChooser
   3 Copyright (C) 2002 Michael Gilfix
   4
   5 This file is part of PyColourChooser.
   6
   7 You should have received a file COPYING containing license terms
   8 along with this program; if not, write to Michael Gilfix
   9 (mgilfix@eecs.tufts.edu) for a copy.
  10
  11 This version of PyColourChooser is open source; you can redistribute it and/or
  12 modify it under the terms listed in the file COPYING.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17 """
  18 # 12/14/2003 - Jeff Grimmett (grimmtooth@softhome.net)
  19 #
  20 # o 2.5 compatability update.
  21 #
  22 # 12/21/2003 - Jeff Grimmett (grimmtooth@softhome.net)
  23 #
  24 # o wxPyColorChooser -> PyColorChooser
  25 # o wxPyColourChooser -> PyColourChooser
  26 # o Commented out wx.InitAllImageHandlers() (see comments at that
  27 #   point for explanation
  28 #
  29
  30 import  cStringIO
  31 import  zlib
  32
  33 import  wx
  34
  35 import  canvas
  36 import  colorsys
  37
  38
  39 # Bitmap functions generated from img2py
  40 def getData():
  41     return zlib.decompress(
  42 'x\xdaUV{<\x93{\x18\x1f:\xe3\xc8Xj\xa3a\xe6R\x9db*B.3\x93\xeb\xe9\x1c\xb7\
  43 \xe4\xb2r9\x8c\xe5\x12e\xc9\xda\x88\x9a\xb4\x83\xcet\xa1N\xae\x85\xe3\xb2\
  44 \xe1,\xb7\xc2\x8a\xd0\x99D\xc8t\xdc\x86r\x1f\x96\\\x16k:\xebC\xe78\xef\xe7\
  45 \xf3\xbe\xbf?\xde\xf7\xf9=\xcf\xf3\xbd<\xbf\xf7WgG;\x90,L\x16\x00\x00\x80\
  46 \x1c\xec\xad]\xc5+[|7\xc8\x00\xc5O\xccv\xddE\xf1\xb2\x8d`\xe5\xe0&#\xbebdpT\
  47 \x00`\xbb\x94\x835\xc6\x8d\x989\x97\xd5N\xca\xb3\x05\xdb\xdc\x9c[\xd0\xf4\
  48 \xd2\xe6\x7f\xb9\xd3\xaa\xe9\x85\xd3\xd5\xd9\xbe]\xa7\xf2\xf1\xf2\x1b\xef\
  49 \x1b\xe6\xb7\tF\xca\t`\xef\xf9\xb5\xa2\x87\xe1\x8d\xd3\x8ft\xef\x06z\xa5\x8f\
  50 \xd7\x04\xf6y\xaf\xfbT\x0e\xad~\xce\xf1E\xa7\xc7\xe9\r\x8c\xab\xb7\xad_\xe4/\
  51 r\xf9\xb1\xbe\x97[\xb3\x88\xfcx\xd6\\\xdf\x15\x88\xca\xcc\xc0\xb0\x10\xef\
  52 \x81B\x9a\xf3Xzq\x1c\xb9\xa2E\xb2\xd3v\x80\xfd90@Ju[\xc3H\xe0\xea\xca\xdc\
  53 \xfbr\xde\xbb\xf0U\xcd\xf4\xd7\xfe\xabc\xbaN\xc2\xe3\xcc>T\xa6)(\xaa\x9f\xe7\
  54 \n\xaa\xe9\x00gcz\xa8Y\xb4\x8a\xc4\x0fr\x9a\x89\xe4\x9eJ\xe7\xa6z\xaf\xf7\
  55 \xcc\xc4\x11YI\xbfx\n@y\x04\x01\x00\nL\xd8\xb3#\xfa\x0e\'\xb7\xc1n\x98\xd3h\
  56 \xd5\x14\xd50\xeaA\x0bd\x8a\x16\x07\x96\xa0#\x13/!\xbf\xf1\xe5\x94)\xd5\xc3\
  57 \xfe\x9ej\x0c<\x8b<8\x89\x98\xcb\x9ek\x18X^\xf9\xa9\xffJ\r/\xd93\xda\xc2\xfd\
  58 \xfa\tt\xb9\xa3\x07\xe8u1\xc5\\O\xe9w\x94\xd6\n\x1e\xe8\xb1Q#@Z\xe2\x10\xd1\
  59 \xcb\xc7\x17\xbd\x9e\x94\x14~\xf9\xd6\xe0\xb1\xb3\xe8\xd8\x07E\xe4\xa6F\x87\
  60 \xbe6:K\xf8\xfanrn\x8b\xa4=e\xb3\x98\xf3\xc8\xde|\x0b\xf0\xb5\xb7\xfb\x0e\
  61 \xf5\x83:m3\xcbs\xfe*T\xc7\x89\xe1\x1a\xc8X=\xbfZ\xc4#\xd0\xee\x93d\xb6lL\
  62 \x15\xe4\xe3\xf7\xd8w\r\x1eK\xe0\xce\xad-`\x19g\xe6\x1f\xc8}\xcc}\xee\xecF\
  63 \x19_\xa6PUq\xee\xa2\x80\x1d\xbc\xf5\x14g\xe04\xa4\xc0EZB\xe6[\x1al\xb2!,\
  64 \xac\xa4\xf3O\x83\xa5y\x96(\xa7\xdd\xc61\x1aX\xa4X\xa8\x96\xdf2\x93\x067\x1c\
  65 \xf0\xed\x10\xaa\xe3\xe9\x96\xac\'l\x14\xb7\xc1\x0ed\x85\x96\xb1\x84m&d\x872\
  66 \x1f)\xe6wt\xd6\tV\xbe\xd4\xbe\xeaE\xcf\xaca\x92f4*Z\xce\xf8\xa0\xd9\x97\xa2\
  67 +\xcc\x90$\xbb\xac8\x0b\xf7\x93\xfa\xb6\xf2\x92\x9d\xa0M\xec\xc6\xaa<\x17\
  68 \xad\x8d\'\xc29\xd1uQjcU}\x8a\x1c\xbf\x9fg\x12\x9c\x1f\\4RZ8\xe2\xf5s@J\t\
  69 \xc5\rU\x92\xab\xf6B\xb3\x97\x8f^\xb8\xa5_\xd0\x98tQ\xa6KA\x12\x0c\x14gl\xc0\
  70 \x00\xe4f*=\xa3\x1ef\x0c\rU<\xb1sO\xaa\x0c\x82;\r)\xc8\x9c\xc0\x1f9CMch\xd4\
  71 \x9fn\xde/g\xc3C\xb0\xb0\x8cuS6\xf3;\x8d2q\x7fG7\x88;\xb4~9\xd5e\xa1}\x7f\
  72 \xd5\xa9Z\x88\x99\xaft+\xeca?\xa2qh\xaf\x8af\xbf\x82\xfe%\xac\xf6\nC_\xc6D\
  73 \xc6Ry\xb3\xb7N\x11"\xcfU\xbb@m\x86AY\na\xfa;\xa1\x93\x96\xf2i\xd0\x04S\x90~\
  74 \x1b\xb8z[1C\xde\x15w\xed\x0b\xd8\xd0\xbe\\\x19\x84\x84\xfe\x1bE\re\xda\x1az\
  75 6\xe6\xbe!+\x86V\xbd\xfb\xc3\xfb\xd9[\xff\xc0\x8c\xc5\nH<\x82U#2S\t\xc8\x1en\
  76 \xa7\xb5E\xde\x14W\xd2w\xe3\xf0\x18\x02\xa0\xf7\xad\xb6\xb2\x96\xfb\xbbH\x02\
  77 \x0b\x85P\xb7\xe4\x02!\xe6a\xc4d\xe8]\x17\xa4\x8bk2G\xaf\xa2p\\\x8e\xd0\x8e\
  78 \t\nf\xce\xf0\x10}O\xc1\x95\x9e\x80\xa6\x91\x8d\xae0\xcf\xa0\xc7\x97-h\xc3\
  79 \x1f\xb8"l\x14\xcaz9\xffYl\x15.l|\xc4\x94\xdd&\x9c\x9f\xf8\xb8f7\x08cA\x1e\
  80 \x85\x11,\xb0\xba\xf1\x87639\xfbJ\xef~e\xf3\xdbK\xd4\xe7\xec\xa5\x92\x17\xf7\
  81 \x1aO\xe3*\xd5\xf3\xcbA\xef\xf4\xa4[\x1d\xaf\xd7>M-\xf1\xb9@\xea\x96x\xd9(\
  82 \x06Z\xec+J\xed\xe5\xd45\x95\xe1\xba\xeb\xf4\xa4\xa3i\xbb\x82}\xd0\xf6Lh\xe8\
  83 E4;0\x9aPk\x0emo~G\x04\xb6&u\xb31\x80\xdao\x01\xf5P\x1d\xd8\x05\x92qmV\xf6R\
  84 \x17\x89\x1a-\xf4\x15P*\xf9?|\xcea\xa9\x8f\x99~6\x92^\xf8\x03s\x11;v\xe2D\
  85 \xc4^\x1c>Q\xbfY\xd0n\xbaE\xc0b=\x91\x0c=[U\x86\xfb\x06\xb52\x92\x19M1uz<\
  86 \xb1\xa4r~4\x83E\xe2y\x08\x0f\nQ\x84\xe8\xfa\xfa\xea\x13\x0e\xd4\x95\x91\\\
  87 \x7f\xf6)\x08`\xb6\x89\xc5\x95^\xff\xe2\\\x03X\xe4\xbe\x88x\x8f\xe34\xb7\xe6\
  88 \xbe\t\xf8\\w\x9c\xd3\x1a\xee\x98\xeeW\x92\xad\x83\x99\xb6B\xcb\x8f\xbdD\x86\
  89 \xc6\xe3\xab\x1b\xb2\xdf\x08:9\xbc\x9e\xf3\xf9h\xd1\xec\xd98\xc8%\x0b\x87c\
  90 \xb8\xbc\x0f\xad\x89\xca\xa5\x94J\xa9\x88j\x1ddo\x91u\x84\xf3\xcd\xea\xc5\
  91 \xf6\x99\xab\xe0\xd7-\x92\xff:\xe6)T\x07\x0bd\x1b\xa9+9\xa4\x86\xec2F\xa1\
  92 \xa6\x7f\xbc\xd1C\x9e\xf4=D\x12\xa2\x07\x94\t\xb1\xe8\xb5\xfb\x94\x14q~R\xa1\
  93 \xe6Y<\xad\xcb\x94j\xbc\xb3##\x0f\xd0 \xbf\xc9\x01\xf8\xad\xb8V\x82sdO7\xbd\
  94 \xbe\xd5Bd\x9f\xc0m#\xd4h<j\xf5*\x84\x86VKt\x0c4\xc1QkD\xbd\xee\xd0\xdc\xcc\
  95 \xad\xc5bN\'\x8f\x1b\x92\x95\x8e\xdf,\xb1\xfa\xe0\xc7f\xd5\xc7\x95\xd1&\xe06\
  96 \xcb\xb4t/\xa0KTj\xd0\xe2\xfb\xd2\xc3!\xf1\xcb?\r7_\x14K$xs(\xfa}~\xe2\xd9\
  97 \xe5gP\xd4\xfaq\x97\xb1\x0b\xd2]\xe5|\x19o2(Vm\xfe>\xe5\x13jZ\xdan\x98\xf3\
  98 \xe4:\x1ep\x93B\xec6?\tO\x0eaB\x99>\xc6Zkr\xcf!\x1b\x84|\xb5\xdb\x8b*O\xb4\
  99 \xe7\x14Ko\xa0\x93\xecmq\xd7\xf0\xbd\x12\x07\x8d\x95\xd7\x7f\xf5&\xb8bmj\xda\
 100 /&`>e\xeb\xfc\x14a\x19\x94S\x7f\xd2\xb5:\x8c\x04\x8f\x91\x03\xc2Q\x0e\xff{\
 101 \x93\xc7\xea\xd6\xbb\x1b\x0e7\xe7E\xa6\xae\x9d\xc6\x85%\x9e\xfbnc\xe3\xff\
 102 \xd4\xa2`9\x13\xa3\x97\x9e\xa4\x9b\x06\xa5\x9f\xec\x9f\x1a\x0c\xf0\xfe\xcd\
 103 \x021\x9b\x0cM\xc06\xfd u:\xe7:g\x02\xc1r\x926\x9b\x7f\xe2\xf9\xe3\xed\xf1qU\
 104 \xbe\xbf\xe8\x91\t\x0c0\xfb-\xe5%d\xef\x19v\x966\xec\xaaB\xe2`N[\x8c\xda\x98\
 105 \xf4\xb4\x83\x13\xcc\x8a\x83\x81\xa3\x91%\xdb\xad\xab\xff\x87\xe1\xba\xda\
 106 \xb5\xdb\xf0\x17\xfd\xf4F\x18KTNH\xf5J\xbc\x97\xdfB:\xa7\x96\xdf/k\x1c\xeaF_\
 107 \x8c\xfc\xdfap\x1e\x99\xae8\x94b\xa1t<\xb54.3c\xd9\xe8y=u9FM;D\xa6\xc0\xea~\
 108 \x0f"O\xee\x81\xdc\xa3\xb2\x1a\xa0\xa7\x02\xb9\x7f>\xfdg\x974\xc8\x0b\xbaU6P\
 109 \xe7\x14\xd8\xd5 \x90\xbc\x0b\xf0\xb7\xc4\x7f\x08\xfaPl\xf5\xa7\x96\xac\xc2\
 110 \x0f*\x05\xf3\x83\xe8\xce\xa7\xc4\x8c\xdbX\xa4U\x9b\xeeW\xe9\xf1\xbf\xa4Q#\
 111 \xcbDQ\x18h\x02\xca\'\xca\xee),1"\x8d\xfb<\x15\xafl\xb8\xb3z\x18\x18\xaf\xb6\
 112 I$\xa2\xbc\xe5\xe5J\xbe\x00\r\x08&<\x0eK\x98\x0e.[\xd1\xea`\xa9\xe2\x96\xae-\
 113 d9%\xc0 \x85\xc5{c_\x03x\xaf\x8f\x98P= 0\x8e\xff\xaa\xf5>7\xfeO\x7f\x1b\xcbm\
 114 \xb1W\xa7\t\x9b\xe1w\x02\xc5\xb5\x9fM/\x8d\xab\xe4u\r\x06\xa0\xd6\xc9\xb5\
 115 \xf2\xb7J\x01\xda<\r\x9f\xd1\x06\x03\xea>\xab\x9d\xe6\xde\xb4\xbb\xb1\xc6\
 116 \xa3EP\x1e\x17\x16\xf2\x1c\xa7\x823\xa7\xcc~\xd1\xdb\xb2\xcb\xbd\xe1\xdb\xf0\
 117 W(,\xe9XD)3I\xc4\x15z_\x98\x8b\xb2v\xdb\x13\xd0\xb8\xf3U"\xb713\xaf\xa0\x1dC\
 118 j\x0b\xb0\xf9\xfd\xef\x0ex\xd7l\xa5\xc1\xf7Z\xd2\x12\x1f\xbe\r\x87Shjm\xe3\
 119 \x1c\x92\xbc\xc7^\x9e\xe5\x84\xf9\xb8\xcb\x88+\x12\xb4M\xee\xb0\xbb\xcd\xc4\
 120 \x9c\xc7V\x1f\xde\x1b\x02\xb0!\x0c\xbeY&\xf6\xe9\xdd[u:0\x0f)(\xc5g\n\xd5\
 121 \xb6\xcc\xf0st\n\x113\x81Q\xcc\xef\xaa\x1b\x9a#\xad|\x12\x98\xd8\xf7"\xa2\
 122 \xa2\xd7\xdbwz+\x08\xb8\x0c\x9d&mZ\\-<\xbaG6j\x9cy@\x8ah\x10@\x8e\xd9\x12\
 123 \x9dK\x00\xf3\xabdo\x1f\x8b\x80\x9c\xf7i^#\xc1X\x7f-\x13R](\x17\xa0\x89p\x9c\
 124 L\x1a\xc5\x9c\x88U\xde\xc7\x9d\xd04\x04\x8en\x11\x8112\xbd\xf6J\x96wP\x06\
 125 \xcd\xa9x\x08\xf7\xc3\xfc\x0e\xceE\xef\xf9j\xd50\x19~\x02~\xf7C\x13\xae\xd8\
 126 \xea\x8e\xc9\x8c\xafpU\xc8\x8d\xaa\xe5\x88Q\xfan\x93\xf7\xf0(\xb0\x93\xf5NH\
 127 \x1f\xae\xc5\xf8\xaa\x97F4\x19;\x19\xe4=\x89\xe0\xae\x15\xc9\xb6\xfe\xe2\xce\
 128 \x1e\xca\xe6\x1a\n<\t\xa9].x\x03\xfd\x1c\x86Fd?\xbd\x17|z\x03\xa8\xafX[N"|\
 129 \x16\xa3#\x0e\x92\xf0h{^+K\x04/!\x8f\xac\xf4\xe4\xbbH\xa9.\x85q\xdd\x93\xc7\
 130 \xbb`\x96\xbb\xb5\xefQ\xdc\x9ch+G\xf8\xbf\xf6b\xdc\xfbww\xcf\xc7\x85\xf7\n@\
 131 \x8d[\xdc\x1b\x8e\xd5\x85\x1c\xf0@JG\x08\xc9;\n\xfb\x9dX\xc5\x8e\t\\\xb3g#\
 132 \xa0\xa2\xb7`\n\x96\x116?\xda\x83\xea\xa1\x7f.Y\x9f\xcb\xda_\x8c\xe9\x01s\
 133 \x0f\xf6\x03\xb7:\xa0\xc6\x94\xaat\xc4\x96r\x1c\x12\x06\x1dZ\xf7\x10V\xd5\
 134 \x088\x02N\xc6\xcc\x05y\xd7\xc0T\x07,c\xea\xb2\xcf\xc7=>y\x87M_\x9a\x86\x12\
 135 \xa5\x92\x83\n_"\x84\xff\x8b7\x95\xfeu\x02\x9c\xf7\xe4\xfacQyo\xda\xbb\t\xed\
 136 \xdeS\xd3\xb7\x04/j\xdb\x96\xae\xec\xd3\x01\xb8P\x8ap\x8c7\x88\xc2\xa8\xfd\
 137 \x1d\xd5\xd1=\xab$*\x8c\x9dd\xacu\x07\xe3\xa6X\xed\x1d\xb9eHd@\x8f\xb7\xd4V\
 138 \xdc\x95\x0f\xa91\xba\xe3s?\n\x12\xf2\x97\xefh\xf4\x1d\x89\x04\xccC)\x8f\x83\
 139 \xbf\x84\xd5\xe0A\xb7\xccC\xf9\xc3fGA\x92\xe4\x12\x89\x03\x14bb\xdfe\xd9\x7f\
 140 \x0f\x86\xc6R\xf9wC\x114\xe0\xdd\xae9\xc9ef\x92\xb6\x12\x1eU\'ZW\xa2\xe9\xa7\
 141 4\x15\xfdb\nr\x17\xf1\xe15IkA\xe5\x12aM[&\x93T\x16\xa5\x92x\xf8\xc3\xd4\xca\
 142 \xd8[\x96]wPNO\t!5\xaf&\xfarlLC\xdd\x00\xdd\x8e\x13qc\xea&]nAb\x8b1>)9\x047\
 143 \xc5\x8e\x1a\xd5\x84\x8b\x7f\x8f\x01\x0e6\x8e\xd6eV~W\xff\x01[x\x1b=' )
 144
 145 def getBitmap():
 146     return wx.BitmapFromImage(getImage())
 147
 148 def getImage():
 149     stream = cStringIO.StringIO(getData())
 150     return wx.ImageFromStream(stream)
 151
 152 class PyPalette(canvas.Canvas):
 153     """The Pure-Python Palette
 154
 155     The PyPalette is a pure python implementation of a colour palette. The
 156     palette implementation here imitates the palette layout used by MS
 157     Windows and Adobe Photoshop.
 158
 159     The actual palette image has been embedded as an XPM for speed. The
 160     actual reverse-engineered drawing algorithm is provided in the
 161     GeneratePaletteBMP() method. The algorithm is tweakable by supplying
 162     the granularity factor to improve speed at the cost of display
 163     beauty. Since the generator isn't used in real time, no one will
 164     likely care :) But if you need it for some sort of unforeseen realtime
 165     application, it's there.
 166     """
 167
 168     HORIZONTAL_STEP = 2
 169     VERTICAL_STEP   = 4
 170
 171     def __init__(self, parent, id):
 172         """Creates a palette object."""
 173         # Load the pre-generated palette XPM
 174
 175         # Leaving this in causes warning messages in some cases.
 176         # It is the responsibility of the app to init the image
 177         # handlers, IAW RD
 178         #wx.InitAllImageHandlers()
 179
 180         self.palette = getBitmap ()
 181         canvas.Canvas.__init__ (self, parent, id, size=(200, 192))
 182
 183     def GetValue(self, x, y):
 184         """Returns a colour value at a specific x, y coordinate pair. This
 185         is useful for determining the colour found a specific mouse click
 186         in an external event handler."""
 187         return self.buffer.GetPixel((x, y))
 188
 189     def DrawBuffer(self):
 190         """Draws the palette XPM into the memory buffer."""
 191         #self.GeneratePaletteBMP ("foo.bmp")
 192         self.buffer.DrawBitmap(self.palette, (0, 0), 0)
 193
 194     def HighlightPoint(self, x, y):
 195         """Highlights an area of the palette with a little circle around
 196         the coordinate point"""
 197         colour = wx.Colour(0, 0, 0)
 198         self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
 199         self.buffer.SetBrush(wx.Brush(colour, wx.TRANSPARENT))
 200         self.buffer.DrawCircle((x, y), 3)
 201         self.Refresh()
 202
 203     def GeneratePaletteBMP(self, file_name, granularity=1):
 204         """The actual palette drawing algorithm.
 205
 206         This used to be 100% reverse engineered by looking at the
 207         values on the MS map, but has since been redone Correctly(tm)
 208         according to the HSV (hue, saturation, value) colour model by
 209         Charl P. Botha <http://cpbotha.net/>.
 210
 211         Speed is tweakable by changing the granularity factor, but
 212         that affects how nice the output looks (makes the vertical
 213         blocks bigger. This method was used to generate the embedded
 214         XPM data."""
 215         self.vertical_step = self.VERTICAL_STEP * granularity
 216         width, height = self.GetSize ()
 217
 218         # simply iterate over hue (horizontal) and saturation (vertical)
 219         value = 1.0
 220         for y in range(0, height, self.vertical_step):
 221             saturation = 1.0 - float(y) / float(height)
 222             for x in range(0, width, self.HORIZONTAL_STEP):
 223                 hue = float(x) / float(width)
 224                 r,g,b = colorsys.hsv_to_rgb(hue, saturation, value)
 225                 colour = wx.Colour(int(r * 255.0), int(g * 255.0), int(b * 255.0))
 226                 self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
 227                 self.buffer.SetBrush(wx.Brush(colour, wx.SOLID))
 228                 self.buffer.DrawRectangle((x, y),
 229                                           (self.HORIZONTAL_STEP, self.vertical_step))
 230
 231         # this code is now simpler (and works)
 232         bitmap = self.buffer.GetBitmap()
 233         image = wx.ImageFromBitmap(bitmap)
 234         image.SaveFile (file_name, wx.BITMAP_TYPE_XPM)