russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
100 lines
3.1 KiB
Java
100 lines
3.1 KiB
Java
/*
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* Copyright (c) 2015, 2025, 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 8077409
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* @summary Drawing deviates when validate() is invoked on java.awt.ScrollPane
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* @run main bug8077409Test
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*/
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import java.awt.AWTException;
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import java.awt.BorderLayout;
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import java.awt.Canvas;
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import java.awt.Color;
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import java.awt.Dimension;
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import java.awt.Frame;
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import java.awt.Graphics;
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import java.awt.Point;
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import java.awt.ScrollPane;
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import java.awt.event.KeyEvent;
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public class bug8077409Test extends Frame {
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ScrollPane pane;
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MyCanvas myCanvas;
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public bug8077409Test() {
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super();
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setLayout(new BorderLayout());
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pane = new ScrollPane();
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myCanvas = new MyCanvas();
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pane.add(myCanvas);
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add(pane, BorderLayout.CENTER);
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setSize(320, 480);
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}
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public static void main(String[] args) throws AWTException, InterruptedException {
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final bug8077409Test obj = new bug8077409Test();
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try {
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obj.setLocationRelativeTo(null);
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obj.setVisible(true);
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Point scrollPosition = obj.pane.getScrollPosition();
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scrollPosition.translate(0, 1);
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obj.pane.setScrollPosition(scrollPosition);
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int y = obj.pane.getComponent(0).getLocation().y;
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obj.pane.validate();
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if (y != obj.pane.getComponent(0).getLocation().y) {
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throw new RuntimeException("Wrong position of component in ScrollPane");
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}
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} finally {
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obj.dispose();
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}
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}
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@Override
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protected void processKeyEvent(KeyEvent e) {
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super.processKeyEvent(e);
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}
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class MyCanvas extends Canvas {
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@Override
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public Dimension getPreferredSize() {
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return new Dimension(400, 800);
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}
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@Override
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public void paint(Graphics g) {
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g.setColor(Color.BLACK);
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g.drawLine(0, 0, 399, 0);
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g.setColor(Color.RED);
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g.drawLine(0, 1, 399, 1);
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g.setColor(Color.BLUE);
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g.drawLine(0, 2, 399, 2);
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g.setColor(Color.GREEN);
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g.drawLine(0, 3, 399, 3);
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}
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}
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}
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