plugins/ui-designer/src/com/intellij/uiDesigner/designSurface/DragLayer.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.uiDesigner.designSurface;
  17
  18 import com.intellij.uiDesigner.radComponents.RadComponent;
  19
  20 import javax.swing.*;
  21 import java.awt.*;
  22
  23 /**
  24  * @author Anton Katilin
  25  * @author Vladimir Kondratyev
  26  */
  27 final class DragLayer extends PassiveDecorationLayer {
  28   public DragLayer(final GuiEditor editor) {
  29     super(editor);
  30   }
  31
  32   public void paint(final Graphics g){
  33     ((Graphics2D)g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.3f));
  34
  35     // Paint passive decoration of dragged components
  36     for(int i = getComponentCount() - 1; i >= 0; i--){
  37       final Component child = getComponent(i);
  38       if(child instanceof JComponent){
  39         final Object prop = ((JComponent)child).getClientProperty(RadComponent.CLIENT_PROP_RAD_COMPONENT);
  40         if(prop != null){
  41           final RadComponent radComponent = (RadComponent)prop;
  42           paintPassiveDecoration(radComponent, g);
  43         }
  44       }
  45     }
  46
  47     // Paint selection rectangle
  48     paintChildren(g);
  49   }
  50 }