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# tk common colour chooser dialogue
#
# this module provides an interface to the native color dialogue
# available in Tk 4.2 and newer.
#
# written by Fredrik Lundh, May 1997
#
# fixed initialcolor handling in August 1998
#
#
# options (all have default values):
#
# - initialcolor: colour to mark as selected when dialog is displayed
# (given as an RGB triplet or a Tk color string)
#
# - parent: which window to place the dialog on top of
#
# - title: dialog title
#
from tkinter.commondialog import Dialog
#
# color chooser class
class Chooser(Dialog):
"Ask for a color"
command = "tk_chooseColor"
def _fixoptions(self):
try:
# make sure initialcolor is a tk color string
color = self.options["initialcolor"]
if isinstance(color, tuple):
# assume an RGB triplet
self.options["initialcolor"] = "#%02x%02x%02x" % color
except KeyError:
pass
def _fixresult(self, widget, result):
# result can be somethings: an empty tuple, an empty string or
# a Tcl_Obj, so this somewhat weird check handles that
if not result or not str(result):
return None, None # canceled
# to simplify application code, the color chooser returns
# an RGB tuple together with the Tk color string
r, g, b = widget.winfo_rgb(result)
return (r/256, g/256, b/256), str(result)
#
# convenience stuff
def askcolor(color = None, **options):
"Ask for a color"
if color:
options = options.copy()
options["initialcolor"] = color
return Chooser(**options).show()
# --------------------------------------------------------------------
# test stuff
if __name__ == "__main__":
print("color", askcolor())
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