Java example source code file (bug6989617.java)

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Java - Java tags/keywords

awt, gridbaglayout, gui, hello, jbutton, jframe, jpanel, mypanel, rectangle, runnable, runtimeexception, suntoolkit, swing

The bug6989617.java Java example source code

/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* @test
   @bug 6989617
   @summary Enable JComponent to control repaintings of its children
   @author Alexander Potochkin
   @run main bug6989617
*/

import sun.awt.SunToolkit;

import javax.swing.*;
import java.awt.*;

public class bug6989617 {
    private static MyPanel panel;
    private static JButton button;

    public static void main(String... args) throws Exception {
        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                JFrame frame = new JFrame();
                frame. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                panel = new MyPanel();

                button = new JButton("Hello");
                panel.add(button);
                frame.add(panel);

                frame.setSize(200, 300);
                frame.setVisible(true);
            }
        });
        // Testing the panel as a painting origin,
        // the panel.paintImmediately() must be triggered
        // when button.repaint() is called
        toolkit.realSync();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                panel.resetPaintRectangle();
                button.repaint();
            }
        });
        toolkit.realSync();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                Rectangle pr = panel.getPaintRectangle();
                if (!pr.getSize().equals(button.getSize())) {
                    throw new RuntimeException("wrong size of the dirty area");
                }
                if (!pr.getLocation().equals(button.getLocation())) {
                    throw new RuntimeException("wrong location of the dirty area");
                }
            }
        });
        // Testing the panel as NOT a painting origin
        // the panel.paintImmediately() must NOT be triggered
        // when button.repaint() is called
        toolkit.realSync();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                panel.resetPaintRectangle();
                panel.setPaintingOrigin(false);
                if (panel.getPaintRectangle() != null) {
                    throw new RuntimeException("paint rectangle is not null");
                }
                button.repaint();
            }
        });
        toolkit.realSync();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                if(panel.getPaintRectangle() != null) {
                    throw new RuntimeException("paint rectangle is not null");
                }
                System.out.println("Test passed...");
            }
        });
    }

    static class MyPanel extends JPanel {
        private boolean isPaintingOrigin = true;
        private Rectangle paintRectangle;

        {
            setLayout(new GridBagLayout());
        }

        public boolean isPaintingOrigin() {
            return isPaintingOrigin;
        }

        public void setPaintingOrigin(boolean paintingOrigin) {
            isPaintingOrigin = paintingOrigin;
        }

        public void paintImmediately(int x, int y, int w, int h) {
            super.paintImmediately(x, y, w, h);
            paintRectangle = new Rectangle(x, y, w, h);
        }

        public Rectangle getPaintRectangle() {
            return paintRectangle == null? null: new Rectangle(paintRectangle);
        }

        public void resetPaintRectangle() {
            this.paintRectangle = null;
        }
    }
}