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"""Color chip megawidget.
This widget is used for displaying a color. It consists of three components:
label -- a Tkinter.Label, this is the chip's label which is displayed
about the color chip
chip -- A Tkinter.Frame, the frame displaying the color
name -- a Tkinter.Label, the name of the color
In addition, the megawidget understands the following options:
color -- the color displayed in the chip and name widgets
When run as a script, this program displays a sample chip.
"""
from Tkinter import *
import Pmw
class ChipWidget(Pmw.MegaWidget):
_WIDTH = 150
_HEIGHT = 80
def __init__(self, parent=None, **kw):
options = (('chip_borderwidth', 2, None),
('chip_width', self._WIDTH, None),
('chip_height', self._HEIGHT, None),
('label_text', 'Color', None),
('color', 'blue', self.__set_color),
)
self.defineoptions(kw, options)
# initialize base class -- after defining options
Pmw.MegaWidget.__init__(self, parent)
interiorarg = (self.interior(),)
# create the label
self.__label = self.createcomponent(
# component name, aliases, group
'label', (), None,
# widget class, widget args
Label, interiorarg)
self.__label.grid(row=0, column=0)
# create the color chip
self.__chip = self.createcomponent(
'chip', (), None,
Frame, interiorarg,
relief=RAISED, borderwidth=2)
self.__chip.grid(row=1, column=0)
# create the color name
self.__name = self.createcomponent(
'name', (), None,
Label, interiorarg,)
self.__name.grid(row=2, column=0)
# Check keywords and initialize options
self.initialiseoptions(ChipWidget)
# called whenever `color' option is set
def __set_color(self):
color = self['color']
self.__chip['background'] = color
self.__name['text'] = color
if __name__ == '__main__':
root = Pmw.initialise(fontScheme='pmw1')
root.title('ChipWidget demonstration')
exitbtn = Button(root, text='Exit', command=root.destroy)
exitbtn.pack(side=BOTTOM)
widget = ChipWidget(root, color='red',
chip_width=200,
label_text='Selected Color')
widget.pack()
root.mainloop()
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