d4b73b1b8e
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@24965 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
93 lines
3.0 KiB
Python
93 lines
3.0 KiB
Python
"""
|
|
PyColourChooser
|
|
Copyright (C) 2002 Michael Gilfix
|
|
|
|
This file is part of PyColourChooser.
|
|
|
|
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
|
|
#
|
|
|
|
import wx
|
|
|
|
import canvas
|
|
import colorsys
|
|
|
|
class PyColourSlider(canvas.Canvas):
|
|
"""A Pure-Python Colour Slider
|
|
|
|
The colour slider displays transitions from value 0 to value 1 in
|
|
HSV, allowing the user to select a colour within the transition
|
|
spectrum.
|
|
|
|
This class is best accompanying by a wxSlider that allows the user
|
|
to select a particular colour shade.
|
|
"""
|
|
|
|
HEIGHT = 172
|
|
WIDTH = 12
|
|
|
|
def __init__(self, parent, id, colour=None):
|
|
"""Creates a blank slider instance. A colour must be set before the
|
|
slider will be filled in."""
|
|
# Set the base colour first since our base class calls the buffer
|
|
# drawing function
|
|
self.SetBaseColour(colour)
|
|
|
|
canvas.Canvas.__init__(self, parent, id, size=(self.WIDTH, self.HEIGHT))
|
|
|
|
def SetBaseColour(self, colour):
|
|
"""Sets the base, or target colour, to use as the central colour
|
|
when calculating colour transitions."""
|
|
self.base_colour = colour
|
|
|
|
def GetBaseColour(self):
|
|
"""Return the current colour used as a colour base for filling out
|
|
the slider."""
|
|
return self.base_colour
|
|
|
|
def GetValue(self, pos):
|
|
"""Returns the colour value for a position on the slider. The position
|
|
must be within the valid height of the slider, or results can be
|
|
unpredictable."""
|
|
return self.buffer.GetPixel((0, pos))
|
|
|
|
def DrawBuffer(self):
|
|
"""Actual implementation of the widget's drawing. We simply draw
|
|
from value 0.0 to value 1.0 in HSV."""
|
|
if self.base_colour is None:
|
|
return
|
|
|
|
target_red = self.base_colour.Red()
|
|
target_green = self.base_colour.Green()
|
|
target_blue = self.base_colour.Blue()
|
|
|
|
h,s,v = colorsys.rgb_to_hsv(target_red / 255.0, target_green / 255.0,
|
|
target_blue / 255.0)
|
|
v = 1.0
|
|
vstep = 1.0 / self.HEIGHT
|
|
for y_pos in range(0, self.HEIGHT):
|
|
r,g,b = [c * 255.0 for c in colorsys.hsv_to_rgb(h,s,v)]
|
|
colour = wx.Colour(int(r), int(g), int(b))
|
|
self.buffer.SetPen(wx.Pen(colour, 1, wx.SOLID))
|
|
self.buffer.DrawRectangle((0, y_pos), (15, 1))
|
|
v = v - vstep
|