openapi/src/com/intellij/util/xml/ui/CommitablePanelUserActivityListener.java

   1 /*
   2  * Copyright 2000-2006 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 package com.intellij.util.xml.ui;
  19
  20 import com.intellij.ui.UserActivityListener;
  21 import com.intellij.openapi.application.ApplicationManager;
  22 import com.intellij.util.ui.update.MergingUpdateQueue;
  23 import com.intellij.util.ui.update.Update;
  24 import com.intellij.util.Alarm;
  25
  26 /**
  27  * User: Sergey.Vasiliev
  28  */
  29 public class CommitablePanelUserActivityListener implements UserActivityListener {
  30   private boolean myResetting;
  31
  32   CommittablePanel myPanel;
  33
  34   private Alarm myAlarm;
  35
  36   public CommitablePanelUserActivityListener() {
  37   }
  38
  39   public CommitablePanelUserActivityListener(final CommittablePanel panel) {
  40     myPanel = panel;
  41     myAlarm = new Alarm();
  42  }
  43
  44   final public void stateChanged() {
  45     myAlarm.cancelAllRequests();
  46     myAlarm.addRequest(new Runnable() {
  47       public void run() {
  48         doActivity();
  49       }
  50     }, 239);
  51
  52   }
  53
  54   protected void doActivity() {
  55     if (!myResetting) {
  56       ApplicationManager.getApplication().invokeLater(new Runnable() {
  57         public void run() {
  58
  59           myResetting = true;
  60           try {
  61             applyChanges();
  62           }
  63           finally {
  64             myResetting = false;
  65           }
  66           doAfterApply();
  67         }
  68       });
  69     }
  70   }
  71
  72   protected void applyChanges() {
  73     if (myPanel != null) {
  74       myPanel.commit();
  75     }
  76   }
  77
  78   protected void doAfterApply() {
  79   }
  80 }