100 lines
3.2 KiB
Java
100 lines
3.2 KiB
Java
/*
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* Copyright (c) 1999, 2024, 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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import java.awt.Color;
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import java.awt.Dimension;
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import java.awt.EventQueue;
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import java.awt.Frame;
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import java.awt.Point;
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import java.awt.Rectangle;
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import java.awt.Robot;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.IOException;
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import javax.imageio.ImageIO;
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/*
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* @test
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* @bug 4237529
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* @key headful
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* @summary Test repainting of an empty frame
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* @run main EmptyFrameTest
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*/
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public class EmptyFrameTest {
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private static Frame f;
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private static Robot robot;
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private static volatile Point p;
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private static volatile Dimension d;
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private static final int TOLERANCE = 5;
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public static void main(String[] args) throws Exception {
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robot = new Robot();
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robot.setAutoDelay(100);
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try {
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EventQueue.invokeAndWait(() -> {
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createAndShowUI();
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});
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robot.delay(1000);
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f.setSize(50, 50);
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robot.delay(500);
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EventQueue.invokeAndWait(() -> {
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p = f.getLocation();
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d = f.getSize();
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});
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Rectangle rect = new Rectangle(p, d);
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BufferedImage img = robot.createScreenCapture(rect);
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if (chkImgBackgroundColor(img)) {
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try {
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ImageIO.write(img, "png", new File("Frame.png"));
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} catch (IOException ignored) {}
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throw new RuntimeException("Frame doesn't repaint itself on resize");
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}
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} finally {
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EventQueue.invokeAndWait(() -> {
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if (f != null) {
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f.dispose();
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}
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});
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}
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}
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private static void createAndShowUI() {
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f = new Frame("EmptyFrameTest");
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f.setUndecorated(true);
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f.setBackground(Color.RED);
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f.setVisible(true);
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}
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private static boolean chkImgBackgroundColor(BufferedImage img) {
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for (int x = 1; x < img.getWidth() - 1; ++x) {
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for (int y = 1; y < img.getHeight() - 1; ++y) {
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Color c = new Color(img.getRGB(x, y));
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if ((c.getRed() - Color.RED.getRed()) > TOLERANCE) {
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return true;
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}
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}
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}
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return false;
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}
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}
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