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