d4b73b1b8e
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24965 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
235 lines
12 KiB
Python
235 lines
12 KiB
Python
"""
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PyColourChooser
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Copyright (C) 2002 Michael Gilfix
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This file is part of PyColourChooser.
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You should have received a file COPYING containing license terms
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along with this program; if not, write to Michael Gilfix
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(mgilfix@eecs.tufts.edu) for a copy.
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This version of PyColourChooser is open source; you can redistribute it and/or
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modify it under the terms listed in the file COPYING.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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"""
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# 12/14/2003 - Jeff Grimmett (grimmtooth@softhome.net)
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#
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# o 2.5 compatability update.
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#
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# 12/21/2003 - Jeff Grimmett (grimmtooth@softhome.net)
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#
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# o wxPyColorChooser -> PyColorChooser
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# o wxPyColourChooser -> PyColourChooser
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# o Commented out wx.InitAllImageHandlers() (see comments at that
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# point for explanation
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#
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import cStringIO
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import zlib
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import wx
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import canvas
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import colorsys
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# Bitmap functions generated from img2py
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def getData():
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return zlib.decompress(
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'x\xdaUV{<\x93{\x18\x1f:\xe3\xc8Xj\xa3a\xe6R\x9db*B.3\x93\xeb\xe9\x1c\xb7\
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\xe4\xb2r9\x8c\xe5\x12e\xc9\xda\x88\x9a\xb4\x83\xcet\xa1N\xae\x85\xe3\xb2\
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\xe1,\xb7\xc2\x8a\xd0\x99D\xc8t\xdc\x86r\x1f\x96\\\x16k:\xebC\xe78\xef\xe7\
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\xc5\x8e\x1a\xd5\x84\x8b\x7f\x8f\x01\x0e6\x8e\xd6eV~W\xff\x01[x\x1b=' )
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def getBitmap():
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return wx.BitmapFromImage(getImage())
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def getImage():
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stream = cStringIO.StringIO(getData())
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return wx.ImageFromStream(stream)
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class PyPalette(canvas.Canvas):
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"""The Pure-Python Palette
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The PyPalette is a pure python implementation of a colour palette. The
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palette implementation here imitates the palette layout used by MS
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Windows and Adobe Photoshop.
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The actual palette image has been embedded as an XPM for speed. The
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actual reverse-engineered drawing algorithm is provided in the
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GeneratePaletteBMP() method. The algorithm is tweakable by supplying
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the granularity factor to improve speed at the cost of display
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beauty. Since the generator isn't used in real time, no one will
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likely care :) But if you need it for some sort of unforeseen realtime
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application, it's there.
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"""
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HORIZONTAL_STEP = 2
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VERTICAL_STEP = 4
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def __init__(self, parent, id):
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"""Creates a palette object."""
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# Load the pre-generated palette XPM
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# Leaving this in causes warning messages in some cases.
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# It is the responsibility of the app to init the image
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# handlers, IAW RD
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#wx.InitAllImageHandlers()
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self.palette = getBitmap ()
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canvas.Canvas.__init__ (self, parent, id, size=(200, 192))
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def GetValue(self, x, y):
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"""Returns a colour value at a specific x, y coordinate pair. This
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is useful for determining the colour found a specific mouse click
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in an external event handler."""
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return self.buffer.GetPixel((x, y))
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def DrawBuffer(self):
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"""Draws the palette XPM into the memory buffer."""
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#self.GeneratePaletteBMP ("foo.bmp")
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self.buffer.DrawBitmap(self.palette, (0, 0), 0)
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def HighlightPoint(self, x, y):
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"""Highlights an area of the palette with a little circle around
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the coordinate point"""
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colour = wx.Colour(0, 0, 0)
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self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
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self.buffer.SetBrush(wx.Brush(colour, wx.TRANSPARENT))
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self.buffer.DrawCircle((x, y), 3)
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self.Refresh()
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def GeneratePaletteBMP(self, file_name, granularity=1):
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"""The actual palette drawing algorithm.
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This used to be 100% reverse engineered by looking at the
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values on the MS map, but has since been redone Correctly(tm)
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according to the HSV (hue, saturation, value) colour model by
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Charl P. Botha <http://cpbotha.net/>.
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Speed is tweakable by changing the granularity factor, but
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that affects how nice the output looks (makes the vertical
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blocks bigger. This method was used to generate the embedded
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XPM data."""
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self.vertical_step = self.VERTICAL_STEP * granularity
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width, height = self.GetSize ()
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# simply iterate over hue (horizontal) and saturation (vertical)
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value = 1.0
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for y in range(0, height, self.vertical_step):
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saturation = 1.0 - float(y) / float(height)
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for x in range(0, width, self.HORIZONTAL_STEP):
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hue = float(x) / float(width)
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r,g,b = colorsys.hsv_to_rgb(hue, saturation, value)
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colour = wx.Colour(int(r * 255.0), int(g * 255.0), int(b * 255.0))
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self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
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self.buffer.SetBrush(wx.Brush(colour, wx.SOLID))
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self.buffer.DrawRectangle((x, y),
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(self.HORIZONTAL_STEP, self.vertical_step))
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# this code is now simpler (and works)
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bitmap = self.buffer.GetBitmap()
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image = wx.ImageFromBitmap(bitmap)
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image.SaveFile (file_name, wx.BITMAP_TYPE_XPM)
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