894ffb098c
Reviewed-by: dholmes
87 lines
2.5 KiB
Java
87 lines
2.5 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @key headful
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* @bug 8275715
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* @summary Tests that paint method is not called twice
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* @run main/othervm MultiPaintEventTest
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*/
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import java.awt.*;
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public class MultiPaintEventTest extends Canvas {
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private int count = 0;
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private final Object lock = new Object();
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public void paint(Graphics g) {
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synchronized(lock) {
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count++;
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}
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int w = getWidth();
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int h = getHeight();
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Graphics2D g2d = (Graphics2D)g;
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if (count % 2 == 1) {
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g2d.setColor(Color.green);
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} else {
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g2d.setColor(Color.red);
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}
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g2d.fillRect(0, 0, w, h);
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}
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public int getCount() {
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synchronized(lock) {
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return count;
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}
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}
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public Dimension getPreferredSize() {
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return new Dimension(400, 400);
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}
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public static void main(String[] args) {
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MultiPaintEventTest test = new MultiPaintEventTest();
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Frame frame = new Frame();
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frame.setUndecorated(true);
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frame.add(test);
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frame.pack();
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frame.setLocationRelativeTo(null);
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frame.setVisible(true);
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try {
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Thread.sleep(2000);
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if (test.getCount() > 1) {
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throw new RuntimeException("Processed unnecessary paint().");
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}
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} catch (InterruptedException ex) {
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throw new RuntimeException("Failed: Interrupted");
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} finally {
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frame.dispose();
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}
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}
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}
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