1 /*
   2  * Copyright (c) 2011, 2013, 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 package com.sun.glass.ui.lens;
  27 
  28 import com.sun.glass.ui.Timer;
  29 
  30 /**
  31  * Lens implementation class for Timer.
  32  */
  33 final class LensTimer extends Timer {
  34     static java.util.Timer timer;
  35     private java.util.TimerTask task;
  36 
  37     protected LensTimer(final Runnable runnable) {
  38         super(runnable);
  39     }
  40 
  41     static int getMinPeriod_impl() {
  42         return 0;
  43     }
  44 
  45     static int getMaxPeriod_impl() {
  46         return 1000000;
  47     }
  48 
  49     @Override protected long _start(final Runnable runnable, int period) {
  50         if (timer == null) {
  51             timer = new java.util.Timer(true);
  52         }
  53 
  54         task = new java.util.TimerTask() {
  55 
  56             @Override
  57             public void run() {
  58                 runnable.run();
  59             }
  60         };
  61 
  62         timer.schedule(task, 0, (long)period);
  63         return 1; // need something non-zero to denote success.
  64     }
  65 
  66     @Override protected long _start(Runnable runnable) {
  67         throw new RuntimeException("vsync timer not supported");
  68     }
  69 
  70     @Override protected void _stop(long timer) {
  71         if (task != null) {
  72             task.cancel();
  73             task = null;
  74         }
  75     }
  76 }
  77