gtk:box, gtk:container, gtk:widget, gtk:buildable, gtk:orientable, gtk:color-chooser, gobject:object, common-lisp:standard-object, common-lisp:t

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The gtk:color-chooser-widget widget lets the user select a color. By default, the chooser presents a prefined palette of colors, plus a small number of settable custom colors. It is also possible to select a different color with the single-color editor. To enter the single-color editing mode, use the context menu of any color of the palette, or use the '+' button to add a new custom color.

The chooser automatically remembers the last selection, as well as custom colors. To change the initially selected color or to get the selected color use the gtk:color-chooser-rgba function.

The gtk:color-chooser-widget widget is used in the gtk:color-chooser-dialog widget to provide a dialog for selecting colors. The gtk:color-chooser-widget class has a single CSS node with name colorchooser. This example shows a color chooser widget in a window. The selected color is output to the console.

(defun example-color-chooser-widget ()
  (gtk:within-main-loop
    (let ((window (make-instance 'gtk:window
                                 :title "Example Color Chooser Widget"
                                 :border-width 12
                                 :default-width 400))
          (color-chooser (make-instance 'gtk:color-chooser-widget)))
        (g:signal-connect window "destroy"
                          (lambda (widget)
                            (declare (ignore widget))
                            (gtk:leave-gtk-main)))
        (g:signal-connect color-chooser "color-activated"
            (lambda (chooser color)
              (declare (ignore chooser))
              (format t "Selected color is ~a~%" (gdk:rgba-to-string color))))
        (gtk:container-add window color-chooser)
        (gtk:widget-show-all window))))