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  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
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  23 
  24 /* @test
  25    @bug 6989617
  26    @summary Enable JComponent to control repaintings of its children
  27    @author Alexander Potochkin
  28    @run main bug6989617
  29 */
  30 
  31 import sun.awt.SunToolkit;
  32 
  33 import javax.swing.*;
  34 import java.awt.*;
  35 
  36 public class bug6989617 {
  37     private static MyPanel panel;
  38     private static JButton button;
  39 
  40     public static void main(String... args) throws Exception {
  41         SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
  42         SwingUtilities.invokeAndWait(new Runnable() {
  43             public void run() {
  44                 JFrame frame = new JFrame();
  45                 frame. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  46                 panel = new MyPanel();
  47 
  48                 button = new JButton("Hello");
  49                 panel.add(button);
  50                 frame.add(panel);
  51 
  52                 frame.setSize(200, 300);
  53                 frame.setVisible(true);
  54             }
  55         });
  56         // Testing the panel as a painting origin,
  57         // the panel.paintImmediately() must be triggered
  58         // when button.repaint() is called
  59         toolkit.realSync();
  60         SwingUtilities.invokeAndWait(new Runnable() {
  61             public void run() {
  62                 panel.resetPaintRectangle();
  63                 button.repaint();
  64             }
  65         });
  66         toolkit.realSync();
  67         SwingUtilities.invokeAndWait(new Runnable() {
  68             public void run() {
  69                 Rectangle pr = panel.getPaintRectangle();
  70                 if (!pr.getSize().equals(button.getSize())) {
  71                     throw new RuntimeException("wrong size of the dirty area");
  72                 }
  73                 if (!pr.getLocation().equals(button.getLocation())) {
  74                     throw new RuntimeException("wrong location of the dirty area");
  75                 }
  76             }
  77         });
  78         // Testing the panel as NOT a painting origin
  79         // the panel.paintImmediately() must NOT be triggered
  80         // when button.repaint() is called
  81         toolkit.realSync();
  82         SwingUtilities.invokeAndWait(new Runnable() {
  83             public void run() {
  84                 panel.resetPaintRectangle();
  85                 panel.setPaintingOrigin(false);
  86                 if (panel.getPaintRectangle() != null) {
  87                     throw new RuntimeException("paint rectangle is not null");
  88                 }
  89                 button.repaint();
  90             }
  91         });
  92         toolkit.realSync();
  93         SwingUtilities.invokeAndWait(new Runnable() {
  94             public void run() {
  95                 if(panel.getPaintRectangle() != null) {
  96                     throw new RuntimeException("paint rectangle is not null");
  97                 }
  98                 System.out.println("Test passed...");
  99             }
 100         });
 101     }
 102 
 103     static class MyPanel extends JPanel {
 104         private boolean isPaintingOrigin = true;
 105         private Rectangle paintRectangle;
 106 
 107         {
 108             setLayout(new GridBagLayout());
 109         }
 110 
 111         public boolean isPaintingOrigin() {
 112             return isPaintingOrigin;
 113         }
 114 
 115         public void setPaintingOrigin(boolean paintingOrigin) {
 116             isPaintingOrigin = paintingOrigin;
 117         }
 118 
 119         public void paintImmediately(int x, int y, int w, int h) {
 120             super.paintImmediately(x, y, w, h);
 121             paintRectangle = new Rectangle(x, y, w, h);
 122         }
 123 
 124         public Rectangle getPaintRectangle() {
 125             return paintRectangle == null? null: new Rectangle(paintRectangle);
 126         }
 127 
 128         public void resetPaintRectangle() {
 129             this.paintRectangle = null;
 130         }
 131     }
 132 }