mirror of https://github.com/python/cpython
Un PMW-ified
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Barry Warsaw
parent
63c9e9851e
commit
dc492e6738
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@ -1,79 +1,92 @@
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"""Color chip megawidget.
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This widget is used for displaying a color. It consists of three components:
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label -- a Tkinter.Label, this is the chip's label which is displayed
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about the color chip
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chip -- A Tkinter.Frame, the frame displaying the color
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name -- a Tkinter.Label, the name of the color
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In addition, the megawidget understands the following options:
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color -- the color displayed in the chip and name widgets
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When run as a script, this program displays a sample chip.
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"""
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from types import StringType
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from Tkinter import *
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import Pmw
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import ColorDB
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class ChipWidget(Pmw.MegaWidget):
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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, parent=None, **kw):
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options = (('chip_borderwidth', 2, None),
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('chip_width', self._WIDTH, None),
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('chip_height', self._HEIGHT, None),
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('label_text', 'Color', None),
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('color', 'blue', self.__set_color),
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)
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self.defineoptions(kw, options)
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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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# initialize base class -- after defining options
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Pmw.MegaWidget.__init__(self, parent)
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interiorarg = (self.interior(),)
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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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# create the label
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self.__label = self.createcomponent(
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# component name, aliases, group
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'label', (), None,
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# widget class, widget args
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Label, interiorarg)
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self.__label.grid(row=0, column=0)
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def get_color(self):
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return self.__chip['background']
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# create the color chip
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self.__chip = self.createcomponent(
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'chip', (), None,
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Frame, interiorarg,
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relief=RAISED, borderwidth=2)
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self.__chip.grid(row=1, column=0)
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def press(self):
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self.__chip.configure(relief=SUNKEN)
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# create the color name
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self.__name = self.createcomponent(
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'name', (), None,
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Label, interiorarg,)
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self.__name.grid(row=2, column=0)
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# Check keywords and initialize options
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self.initialiseoptions(ChipWidget)
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# called whenever `color' option is set
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def __set_color(self):
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color = self['color']
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self.__chip['background'] = color
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self.__name['text'] = color
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def release(self):
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self.__chip.configure(relief=RAISED)
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if __name__ == '__main__':
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root = Pmw.initialise(fontScheme='pmw1')
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root.title('ChipWidget demonstration')
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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)
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self.__frame.pack()
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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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exitbtn = Button(root, text='Exit', command=root.destroy)
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exitbtn.pack(side=BOTTOM)
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widget = ChipWidget(root, color='red',
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chip_width=200,
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label_text='Selected Color')
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widget.pack()
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root.mainloop()
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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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