The method chooseColor is implemented as a perl wrapper
on the core tk ``command'' tk_chooseColor, and $widget
is passed as the argument to the hidden -parent option.
The implementation of internal tk_chooseColor is platform
specific, on Win32 it is a native dialog, and on UNIX/X it is implemented
in terms of Tk::ColorEditor.
The chooseColor method pops up a dialog box for the
user to select a color. The following option-value pairs are
possible as command line arguments:
-initialcolor=>color
Specifies the color to display in the color dialog when it pops
up. color must be in a form acceptable to the Tk_GetColor
function.
-parent=>$widget
Makes $widget the logical parent of the color dialog. The color
dialog is displayed on top of its parent window.
-title=>titleString
Specifies a string to display as the title of the dialog box. If this
option is not specified, then a default title will be displayed.
If the user selects a color, tk_chooseColor will return the
name of the color in a form acceptable to Tk_GetColor. If the
user cancels the operation, the command will return undef.
