wxPython/wx/lib/colourchooser/pypalette.py

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