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run either as a standalone application (by running pynche or
pynche.pyw), or as a modal dialog inside another application. This
can be done by importing pyColorChooser and running askcolor(). The
API for this is the same as the tkColorChooser.askcolor() API, namely:
When `Okay' is hit, askcolor() returns ((r, g, b), "name"). When
`Cancel' is hit, askcolor() returns (None, None).
Note the following differences:
1. pyColorChooser.askcolor() takes an optional keyword `master'
which if set tells Pynche to run as a modal dialog. `master'
is a Tkinter parent window. Without the `master' keyword
Pynche runs standalone.
2. in pyColorChooser.askcolor() will return a Tk/X11 color name as
"name" if there is an exact match, otherwise it will return a
color spec, e.g. "#rrggbb". tkColorChooser can't return a
color name.
There are also some UI differences when running standalone vs. modal.
When modal, there is no "File" menu, but instead there are "Okay" and
"Cancel" buttons.
The implementation of all this is a bit of a hack, but it seems to
work moderately well. I'm not guaranteeing the pyColorChooser.Chooser
class has the same semantics as the tkColorChooser.Chooser class.
107 lines
3.9 KiB
Python
107 lines
3.9 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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master = 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(master, 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(master, 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(master, 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, master=None):
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self.__sb = switchboard
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self.__frame = Frame(master, relief=RAISED, borderwidth=1)
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self.__frame.grid(row=3, column=0, ipadx=5)
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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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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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