1 /*
   2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 
  27 package sun.awt.X11;
  28 
  29 import java.awt.Component;
  30 import java.awt.Graphics;
  31 
  32 import sun.awt.AWTAccessor;
  33 import sun.awt.RepaintArea;
  34 
  35 /**
  36  * The <code>RepaintArea</code> is a geometric construct created for the
  37  * purpose of holding the geometry of several coalesced paint events.
  38  * This geometry is accessed synchronously, although it is written such
  39  * that painting may still be executed asynchronously.
  40  *
  41  * @author      Eric Hawkes
  42  */
  43 final class XRepaintArea extends RepaintArea {
  44 
  45     /**
  46      * Calls <code>Component.update(Graphics)</code> with given Graphics.
  47      */
  48     protected void updateComponent(Component comp, Graphics g) {
  49         if (comp != null) {
  50             // We don't call peer.paintPeer() here, because we shouldn't paint
  51             // native component when processing UPDATE events.
  52             super.updateComponent(comp, g);
  53         }
  54     }
  55 
  56     /**
  57      * Calls <code>Component.paint(Graphics)</code> with given Graphics.
  58      */
  59     protected void paintComponent(Component comp, Graphics g) {
  60         if (comp != null) {
  61             final XComponentPeer peer = AWTAccessor.getComponentAccessor()
  62                                                    .getPeer(comp);
  63             if (peer != null) {
  64                 peer.paintPeer(g);
  65             }
  66             super.paintComponent(comp, g);
  67         }
  68     }
  69 }