platform/platform-impl/src/com/intellij/openapi/project/DumbModeIndicator.java

   1 /*
   2  * Copyright 2000-2009 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 package com.intellij.openapi.project;
  17
  18 import com.intellij.openapi.components.AbstractProjectComponent;
  19 import com.intellij.openapi.ui.popup.BalloonHandler;
  20 import com.intellij.util.Alarm;
  21 import org.jetbrains.annotations.NotNull;
  22
  23 /**
  24  * @author peter
  25  */
  26 public class DumbModeIndicator extends AbstractProjectComponent {
  27   private final Alarm myAlarm;
  28
  29   public DumbModeIndicator(Project project) {
  30     super(project);
  31     myAlarm = new Alarm(project);
  32   }
  33
  34   public void projectOpened() {
  35     myProject.getMessageBus().connect().subscribe(DumbService.DUMB_MODE, new DumbService.DumbModeListener() {
  36       BalloonHandler myHandler;
  37
  38       public void enteredDumbMode() {
  39         myAlarm.addRequest(new Runnable() {
  40           public void run() {
  41             myHandler = DumbService.getInstance(myProject).showDumbModeNotification(
  42               "Updating project indices...<br>" +
  43               "Refactorings, usage search and some other features will become available after indexing is complete");
  44           }
  45         }, 1000);
  46       }
  47
  48       public void exitDumbMode() {
  49         myAlarm.cancelAllRequests();
  50         if (myHandler != null) myHandler.hide();
  51         myHandler = null;
  52       }
  53     });
  54   }
  55
  56   @NotNull
  57   public String getComponentName() {
  58     return DumbModeIndicator.class.getSimpleName();
  59   }
  60 }