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/*
* Copyright (c) 2016, 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.
*/
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.JSlider;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.plaf.metal.MetalLookAndFeel;
/*
* @test
* @bug 8162856
* @summary Bad rendering of Swing UI controls with Metal L&F on HiDPI display
* @run main MetalHiDPISliderThumbTest
*/
public class MetalHiDPISliderThumbTest {
public static void main(String[] args) throws Exception {
SwingUtilities.invokeAndWait(() -> {
try {
UIManager.setLookAndFeel(new MetalLookAndFeel());
} catch (Exception e) {
throw new RuntimeException(e);
}
if (!testSliderThumb(true)) {
throw new RuntimeException("Horizontal Slider Thumb is not scaled!");
}
if (!testSliderThumb(false)) {
throw new RuntimeException("Vertical Slider Thumb is not scaled!");
}
});
}
private static boolean testSliderThumb(boolean horizontal) {
int scale = 3;
int w = horizontal ? 100 : 20;
int h = horizontal ? 20 : 100;
JSlider testSlider = new JSlider();
testSlider.setSize(w, h);
Dimension size = new Dimension(w, h);
testSlider.setPreferredSize(size);
testSlider.setMinimumSize(size);
testSlider.setMaximumSize(size);
testSlider.setOrientation(horizontal ? JSlider.HORIZONTAL : JSlider.VERTICAL);
int sw = scale * w;
int sh = scale * h;
final BufferedImage img = new BufferedImage(sw, sh, BufferedImage.TYPE_INT_RGB);
Graphics2D g = img.createGraphics();
g.scale(scale, scale);
testSlider.paint(g);
g.dispose();
if (horizontal) {
int y = sh / 2;
int xMin = 0;
int rgb = img.getRGB(xMin, y);
for (int i = 0; i < sw; i++) {
if (img.getRGB(i, y) != rgb) {
xMin = i;
break;
}
}
int xMax = sw - 1;
rgb = img.getRGB(xMax, y);
for (int i = sw - 1; i > 0; i--) {
if (img.getRGB(i, y) != rgb) {
xMax = i;
break;
}
}
int d = 3 * scale;
int xc = (xMin + xMax) / 2 - d;
rgb = img.getRGB(xc, y);
for (int x = xMin + d; x < xc; x++) {
if (img.getRGB(x, y) != rgb) {
return true;
}
}
} else {
int x = sw / 2;
int yMin = 0;
int rgb = img.getRGB(x, yMin);
for (int i = 0; i < sh; i++) {
if (img.getRGB(x, i) != rgb) {
yMin = i;
break;
}
}
int yMax = sh - 1;
rgb = img.getRGB(x, yMax);
for (int i = sh - 1; i > 0; i--) {
if (img.getRGB(x, i) != rgb) {
yMax = i;
break;
}
}
int d = 3 * scale;
int yc = (yMin + yMax) / 2 - d;
rgb = img.getRGB(x, yc);
for (int y = yMin + d; y < yc; y++) {
if (img.getRGB(x, y) != rgb) {
return true;
}
}
}
return false;
}
}
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