X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8b9a4190f70909de9568f45389e7aa3ecbc66b8a..eb3efe0d4b8a0964cd0504a69c0e9540c18e390c:/wxPython/wx/lib/colourchooser/pypalette.py?ds=sidebyside diff --git a/wxPython/wx/lib/colourchooser/pypalette.py b/wxPython/wx/lib/colourchooser/pypalette.py index 46981f1a7e..1004783845 100644 --- a/wxPython/wx/lib/colourchooser/pypalette.py +++ b/wxPython/wx/lib/colourchooser/pypalette.py @@ -1,8 +1,234 @@ +""" +PyColourChooser +Copyright (C) 2002 Michael Gilfix -"""Renamer stub: provides a way to drop the wx prefix from wxPython objects.""" +This file is part of PyColourChooser. -from wx import _rename -from wxPython.lib.colourchooser import pypalette -_rename(globals(), pypalette.__dict__, modulename='lib.colourchooser.pypalette') -del pypalette -del _rename +You should have received a file COPYING containing license terms +along with this program; if not, write to Michael Gilfix +(mgilfix@eecs.tufts.edu) for a copy. + +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\ +\xe4\xb2r9\x8c\xe5\x12e\xc9\xda\x88\x9a\xb4\x83\xcet\xa1N\xae\x85\xe3\xb2\ 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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 . + + 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)