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112 lines
4.1 KiB
Python
112 lines
4.1 KiB
Python
"""Chip viewer and widget.
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In the lower left corner of the main Pynche window, you will see two
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ChipWidgets, one for the selected color and one for the nearest color. The
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selected color is the actual RGB value expressed as an X11 #COLOR name. The
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nearest color is the named color from the X11 database that is closest to the
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selected color in 3D space. There may be other colors equally close, but the
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nearest one is the first one found.
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Clicking on the nearest color chip selects that named color.
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The ChipViewer class includes the entire lower left quandrant; i.e. both the
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selected and nearest ChipWidgets.
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"""
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from types import StringType
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from Tkinter import *
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import ColorDB
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class ChipWidget:
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_WIDTH = 150
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_HEIGHT = 80
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def __init__(self,
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parent = None,
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width = _WIDTH,
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height = _HEIGHT,
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text = 'Color',
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initialcolor = 'blue',
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presscmd = None,
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releasecmd = None):
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# create the text label
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self.__label = Label(parent, text=text)
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self.__label.grid(row=0, column=0)
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# create the color chip, implemented as a frame
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self.__chip = Frame(parent, relief=RAISED, borderwidth=2,
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width=width,
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height=height,
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background=initialcolor)
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self.__chip.grid(row=1, column=0)
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# create the color name, ctor argument must be a string
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self.__name = Label(parent, text=initialcolor)
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self.__name.grid(row=2, column=0)
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#
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# set bindings
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if presscmd:
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self.__chip.bind('<ButtonPress-1>', presscmd)
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if releasecmd:
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self.__chip.bind('<ButtonRelease-1>', releasecmd)
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def set_color(self, color):
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self.__chip.config(background=color)
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self.__name.config(text=color)
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def get_color(self):
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return self.__chip['background']
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def press(self):
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self.__chip.configure(relief=SUNKEN)
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def release(self):
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self.__chip.configure(relief=RAISED)
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class ChipViewer:
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def __init__(self, switchboard, parent=None):
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self.__sb = switchboard
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self.__frame = Frame(parent) #, relief=GROOVE, borderwidth=2)
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self.__frame.grid(row=3, column=0)
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# create the chip that will display the currently selected color
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# exactly
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self.__sframe = Frame(self.__frame)
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self.__sframe.grid(row=0, column=0)
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self.__selected = ChipWidget(self.__sframe, text='Selected')
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# create the chip that will display the nearest real X11 color
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# database color name
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self.__nframe = Frame(self.__frame)
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self.__nframe.grid(row=0, column=1)
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self.__nearest = ChipWidget(self.__nframe, text='Nearest',
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presscmd = self.__buttonpress,
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releasecmd = self.__buttonrelease)
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self.__div = Frame(self.__frame,
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width=2,
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borderwidth=2,
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relief=RAISED)
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self.__div.grid(row=0, column=2, sticky='NS', padx=5)
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def update_yourself(self, red, green, blue):
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# TBD: should exactname default to X11 color name if their is an exact
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# match for the rgb triplet? Part of me says it's nice to see both
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# names for the color, the other part says that it's better to
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# feedback the exact match.
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rgbtuple = (red, green, blue)
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try:
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allcolors = self.__sb.colordb().find_byrgb(rgbtuple)
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exactname = allcolors[0]
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except ColorDB.BadColor:
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exactname = ColorDB.triplet_to_rrggbb(rgbtuple)
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nearest = self.__sb.colordb().nearest(red, green, blue)
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self.__selected.set_color(exactname)
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self.__nearest.set_color(nearest)
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def __buttonpress(self, event=None):
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self.__nearest.press()
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def __buttonrelease(self, event=None):
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self.__nearest.release()
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colorname = self.__nearest.get_color()
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red, green, blue = self.__sb.colordb().find_byname(colorname)
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self.__sb.update_views(red, green, blue)
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