This function initiates a color choice operation by presenting a color chooser dialog to the user.
The callback will be called when the dialog is dismissed. It should call gtk.color_dialog.ColorDialog.chooseRgbaFinish to obtain the result.
the parent gtk.window.Window
the color to select initially
a gio.cancellable.Cancellable to cancel the operation
a callback to call when the operation is complete
This function initiates a color choice operation by presenting a color chooser dialog to the user.
The callback will be called when the dialog is dismissed. It should call gtk.color_dialog.ColorDialog.chooseRgbaFinish to obtain the result.