126 lines
4.0 KiB
Java
126 lines
4.0 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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/*
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* @test
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* @bug 4221201
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* @summary Test where the gradient drawn should remain in sync with the
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* rotating rectangle.
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* @library /java/awt/regtesthelpers
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* @build PassFailJFrame
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* @run main/manual JerkyGradient
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*/
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import java.awt.Color;
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import java.awt.Frame;
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import java.awt.GradientPaint;
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import java.awt.Graphics;
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import java.awt.Graphics2D;
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import java.awt.Paint;
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import java.awt.Panel;
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import java.awt.RenderingHints;
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import java.awt.Shape;
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import java.awt.geom.Rectangle2D;
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import java.awt.image.BufferedImage;
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public class JerkyGradient extends Panel implements Runnable {
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protected static Shape mShape;
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protected static Paint mPaint;
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protected static double mTheta;
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static Thread animatorThread;
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static BufferedImage mImg;
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public static void main(String[] args) throws Exception {
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String INSTRUCTIONS = """
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Watch at least one full rotation of the rectangle. Check that
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the gradient drawn remains in sync with the rotating
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rectangle. If so, pass this test. Otherwise, fail this test.
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""";
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PassFailJFrame.builder()
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.title("Test Instructions")
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.instructions(INSTRUCTIONS)
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.columns(35)
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.testUI(JerkyGradient::createUI)
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.build()
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.awaitAndCheck();
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}
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public static Frame createUI() {
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Frame f = new Frame("Rotating Gradient Test");
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JerkyGradient jg = new JerkyGradient();
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f.add(jg);
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f.setSize(200, 200);
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return f;
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}
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public JerkyGradient() {
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mShape = new Rectangle2D.Double(60, 50, 80, 100);
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mPaint = new GradientPaint(0, 0, Color.red,
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25, 25, Color.yellow,
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true);
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mImg = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
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animatorThread = new Thread(this);
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animatorThread.setPriority(Thread.MIN_PRIORITY);
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animatorThread.start();
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}
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public synchronized void run() {
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Thread me = Thread.currentThread();
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double increment = Math.PI / 36;
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double twoPI = Math.PI * 2;
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while (animatorThread == me) {
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mTheta = (mTheta + increment) % twoPI;
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repaint();
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try {
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wait(50);
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} catch (InterruptedException ie) {
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break;
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}
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}
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}
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public void update(Graphics g) {
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Graphics2D g2 = mImg.createGraphics();
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g2.setColor(getBackground());
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g2.fillRect(0, 0, 200, 200);
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g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
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RenderingHints.VALUE_ANTIALIAS_ON);
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g2.rotate(mTheta, 100, 100);
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g2.setPaint(Color.black);
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g2.drawLine(100, 30, 100, 55);
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g2.setPaint(mPaint);
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g2.fill(mShape);
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g2.setPaint(Color.black);
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g2.draw(mShape);
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paint(g);
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g2.dispose();
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}
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public void paint(Graphics g) {
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g.drawImage(mImg, 0, 0, null);
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}
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}
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