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multi zoom level support for pattern for win32
This commit contributes to multi zoom level support of pattern using a map of zoom levels with relevant patterns. Contributes to #62 and #131
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71
...g.eclipse.swt.tests.win32/ManualTests/org/eclipse/swt/widgets/PatternWin32ManualTest.java
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| /******************************************************************************* | ||
| * Copyright (c) 2024 Yatta Solutions | ||
| * | ||
| * This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License 2.0 | ||
| * which accompanies this distribution, and is available at | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Yatta Solutions - initial API and implementation | ||
| *******************************************************************************/ | ||
| package org.eclipse.swt.widgets; | ||
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| import org.eclipse.swt.graphics.Color; | ||
| import org.eclipse.swt.graphics.Pattern; | ||
| import org.eclipse.swt.internal.DPIUtil; | ||
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|
||
| /* | ||
| * This Snippet tests a pattern at multiple zoom levels. | ||
| * | ||
| * It is difficult to test the pattern at multiple zoom level automatically since we also need | ||
| * to test the visual behavior. It is important to make sure that the pattern looks the same | ||
| * regardless of its size as per the zoom level. On the execution, 2 shells are | ||
| * opened at 2 different zoom levels. The pattern is a gradient of 2 colors. On both the | ||
| * shells, the pattern should be uniformly drawn and the size difference of both the patterns | ||
| * should be clearly visible without any visual difference except for the size. The size | ||
| * difference should be equal to the scalingFactor in the snippet. | ||
| * | ||
| */ | ||
| public class PatternWin32ManualTest { | ||
| private static Display display = Display.getDefault(); | ||
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|
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| public static void main (String [] args) { | ||
| int zoom = DPIUtil.getDeviceZoom(); | ||
| int scalingFactor = 3; | ||
| int scaledZoom = zoom * scalingFactor; | ||
| int width = 400; | ||
| int height = 300; | ||
| final Pattern pat = new Pattern(display, 0, 0, width, height, new Color(null, 200, 200, 200), 0, new Color(null, 255, 0, 0), 255); | ||
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| Shell shell1 = createShellWithPattern(width, height, pat, zoom); | ||
| Shell shell2 = createShellWithPattern(width, height, pat, scaledZoom); | ||
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| while (!shell1.isDisposed() || !shell2.isDisposed()) { | ||
| if (!display.readAndDispatch()) { | ||
| display.sleep(); | ||
| } | ||
| } | ||
| pat.dispose(); | ||
| shell1.dispose(); | ||
| shell2.dispose(); | ||
| } | ||
|
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| private static Shell createShellWithPattern(int width, int height, final Pattern pat, int nativeZoom) { | ||
| Shell shell = new Shell(display); | ||
| shell.nativeZoom = nativeZoom; | ||
| shell.setText("Unscaled shell"); | ||
| shell.setSize(width, height); | ||
| shell.addPaintListener(e -> { | ||
| e.gc.setBackground(new Color(null, 100, 200, 0)); | ||
| e.gc.fillRectangle(0, 0, shell.getBounds().width, shell.getBounds().height); | ||
| e.gc.setBackground(new Color(null, 255, 0, 0)); | ||
| e.gc.setBackgroundPattern(pat); | ||
| e.gc.fillRectangle(0, 0, shell.getBounds().width, shell.getBounds().height); | ||
| }); | ||
| shell.open(); | ||
| return shell; | ||
| } | ||
| } |