platform/platform-impl/src/com/intellij/ui/MoveComponentListener.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
  17 package com.intellij.ui;
  18
  19 import com.intellij.ui.awt.RelativePoint;
  20 import com.intellij.ui.popup.AbstractPopup;
  21
  22 import java.awt.*;
  23 import java.awt.event.MouseAdapter;
  24 import java.awt.event.MouseEvent;
  25 import java.awt.event.MouseMotionListener;
  26
  27 /**
  28  * User: anna
  29  * Date: 13-Mar-2006
  30  */
  31 public class MoveComponentListener extends MouseAdapter implements MouseMotionListener {
  32   private final CaptionPanel myComponent;
  33   private Point myStartPoint = null;
  34
  35   public MoveComponentListener(final CaptionPanel component) {
  36     myComponent = component;
  37   }
  38
  39   private void endOperation() {
  40     AbstractPopup.setDefaultCursor(myComponent);
  41     myStartPoint = null;
  42   }
  43
  44   public void mousePressed(MouseEvent e) {
  45     myStartPoint = new RelativePoint(e).getScreenPoint();
  46     final Point titleOffset = RelativePoint.getNorthWestOf(myComponent).getScreenPoint();
  47     myStartPoint.x -= titleOffset.x;
  48     myStartPoint.y -= titleOffset.y;
  49   }
  50
  51   public void mouseClicked(MouseEvent e) {
  52     endOperation();
  53   }
  54
  55   public void mouseReleased(MouseEvent e) {
  56     endOperation();
  57   }
  58
  59   public void mouseMoved(MouseEvent e) {
  60     if (e.isConsumed()) return;
  61     AbstractPopup.setDefaultCursor(myComponent);
  62   }
  63
  64   public void mouseDragged(MouseEvent e) {
  65     if (e.isConsumed()) return;
  66     AbstractPopup.setDefaultCursor(myComponent);
  67     if (myStartPoint != null) {
  68       final Point draggedTo = new RelativePoint(e).getScreenPoint();
  69       draggedTo.x -= myStartPoint.x;
  70       draggedTo.y -= myStartPoint.y;
  71
  72       AbstractPopup.moveTo(myComponent, draggedTo, null);
  73
  74       e.consume();
  75     }
  76   }
  77 }