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# tk common color 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

from tkinter.commondialog import Dialog

__all__ = ["Chooser", "askcolor"]

class Chooser(Dialog):

"""Create a dialog for the tk_chooseColor command.

Args:

master: The master widget for this dialog. If not provided,

defaults to options['parent'] (if defined).

options: Dictionary of options for the tk_chooseColor call.

initialcolor: Specifies the selected color when the

dialog is first displayed. This can be a tk color

string or a 3-tuple of ints in the range (0, 255)

for an RGB triplet.

parent: The parent window of the color dialog. The

color dialog is displayed on top of this.

title: A string for the title of the dialog box.

"""

command = "tk_chooseColor"

def _fixoptions(self):

"""Ensure initialcolor is a tk color string.

Convert initialcolor from a RGB triplet to a color string.

"""

try:

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):

"""Adjust result returned from call to tk_chooseColor.

Return both an RGB tuple of ints in the range (0, 255) and the

tk color string in the form #rrggbb.

"""

# Result can be many things: an empty tuple, an empty string, or

# a _tkinter.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):

"""Display dialog window for selection of a color.

Convenience wrapper for the Chooser class. Displays the color

chooser dialog with color as the initial value.

"""

if color:

options = options.copy()

options["initialcolor"] = color

return Chooser(**options).show()

# --------------------------------------------------------------------

# test stuff

if __name__ == "__main__":

print("color", askcolor())

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