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;;; -*- Mode: Lisp; Package: CLIM-INTERNALS -*-

;;;  (c) copyright 1998,1999,2000 by Michael McDonald (mikemac@mikemac.com), 
;;;  (c) copyright 2000 by 
;;;           Iban Hatchondo (hatchond@emi.u-bordeaux.fr)
;;;           Julien Boninfante (boninfan@emi.u-bordeaux.fr)
;;;           Robert Strandh (strandh@labri.u-bordeaux.fr)

;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the 
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
;;; Boston, MA  02111-1307  USA.



;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; The Repaint Protocol

(in-package :clim-internals)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; repaint protocol functions

(defmethod queue-repaint ((sheet basic-sheet) (event window-repaint-event))
  (queue-event sheet event))

(defmethod handle-repaint ((sheet basic-sheet) region)    
  (declare (ignore region))
  nil)

(defmethod repaint-sheet ((sheet basic-sheet) region)
  (map-over-sheets-overlapping-region #'(lambda (s)
					  (handle-repaint s region))
				      sheet
				      region))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; repaint protocol classes

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; standard repainting mixin

(defclass standard-repainting-mixin () ())

(defmethod dispatch-event
    ((sheet standard-repainting-mixin) (event window-repaint-event)) 
  (queue-repaint sheet event))

(defmethod dispatch-repaint ((sheet standard-repainting-mixin) region)
  (when (sheet-mirror sheet)            ;only dispatch repaints, when the sheet has a mirror
    (queue-repaint sheet (make-instance 'window-repaint-event
                                        :sheet sheet
                                        :region (transform-region
                                                 (sheet-native-transformation sheet)
                                                 region)))))

(defmethod handle-event ((sheet standard-repainting-mixin)
			 (event window-repaint-event))
  (handle-repaint sheet (window-event-region event)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; immediate repainting mixin

(defclass immediate-repainting-mixin () ())

(defmethod dispatch-event
    ((sheet immediate-repainting-mixin) (event window-repaint-event))
  (handle-repaint sheet (window-event-region event)))

(defmethod dispatch-repaint ((sheet immediate-repainting-mixin) region)
  (handle-repaint sheet region))

(defmethod handle-event ((sheet immediate-repainting-mixin)
			 (event window-repaint-event))
  (handle-repaint sheet (window-event-region event)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; sheet mute repainting mixin

(defclass sheet-mute-repainting-mixin () ())

(defmethod dispatch-repaint ((sheet sheet-mute-repainting-mixin) region)
  (when (sheet-mirror sheet)            ;only dispatch repaints, when the sheet has a mirror
    (queue-repaint sheet (make-instance 'window-repaint-event
                                        :sheet sheet
                                        :region (transform-region
                                                 (sheet-native-transformation sheet)
                                                 region)))))

;;; I know what the spec says about sheet-mute-repainting-mixin, but I don't
;;; think it's right; "repaint-sheet that does nothing" makes no sense.
;;; -- moore
#+nil
(defmethod repaint-sheet ((sheet sheet-mute-repainting-mixin) region)
  (declare (ignorable sheet region))
  (format *trace-output* "repaint ~S~%" sheet)
  (values))

(defmethod handle-repaint ((sheet sheet-mute-repainting-mixin) region)
  (declare (ignore region))
  nil)

(defclass clim-repainting-mixin
    (#+clim-mp standard-repainting-mixin #-clim-mp immediate-repainting-mixin)
  ()
  (:documentation "Internal class that implements repainting protocol based on
  whether or not multiprocessing is supported."))