| /******************************************************************************* |
| * Copyright (c) 2004, 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.tests.performance.layout; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.ui.WorkbenchException; |
| import org.eclipse.ui.tests.performance.BasicPerformanceTest; |
| |
| /** |
| * Measures the performance of a widget's computeSize method |
| * |
| * @since 3.1 |
| */ |
| public class ComputeSizeTest extends BasicPerformanceTest { |
| |
| private TestWidgetFactory widgetFactory; |
| private int xIterations = 10; |
| private int yIterations = 10; |
| |
| /** |
| * @param testName |
| */ |
| public ComputeSizeTest(TestWidgetFactory widgetFactory) { |
| super(widgetFactory.getName() + " computeSize"); |
| |
| this.widgetFactory = widgetFactory; |
| } |
| |
| /** |
| * Run the test |
| */ |
| protected void runTest() throws CoreException, WorkbenchException { |
| |
| widgetFactory.init(); |
| final Composite widget = widgetFactory.getControl(); |
| //Rectangle initialBounds = widget.getBounds(); |
| final Point maxSize = widgetFactory.getMaxSize(); |
| |
| // Iteration counter. We increment this each pass through the loop in order to |
| // generate slightly different test data each time |
| final int[] counter = new int[] {0}; |
| |
| for (int j = 0; j < 100; j++) { |
| // This counter determines whether we're computing a width, |
| // height, or fixed |
| // size and whether or not we flush the cache. |
| |
| // We do things this way to avoid calling computeSize with the same (or |
| // similar) values |
| // twice in a row, which would be too easy to cache. |
| int count = counter[0]; |
| |
| startMeasuring(); |
| for (int i = 0; i < 200; i++) { |
| |
| for (int xIteration = 0; xIteration < xIterations; xIteration++) { |
| |
| for (int yIteration = 0; yIteration < yIterations; yIteration++) { |
| // Avoid giving the same x value twice in a row in order to make it hard to cache |
| int xSize = maxSize.x * ((xIteration + yIteration) % xIterations) / xIterations; |
| int ySize = maxSize.y * yIteration / yIterations; |
| |
| // Alternate between flushing and not flushing the cache |
| boolean flushState = (count % 2) != 0; |
| |
| // Alternate between width, height, and fixed, and default size queries |
| // (note: we need to alternate in order to make the result hard to cache) |
| switch(count % 4) { |
| case 0: widget.computeSize(xSize, SWT.DEFAULT, flushState); break; |
| case 1: widget.computeSize(SWT.DEFAULT, ySize, flushState); break; |
| case 2: widget.computeSize(xSize, ySize, flushState); break; |
| case 3: widget.computeSize(SWT.DEFAULT, SWT.DEFAULT, flushState); break; |
| } |
| |
| count++; |
| } |
| } |
| |
| } |
| stopMeasuring(); |
| processEvents(); |
| counter[0]++; |
| } |
| |
| commitMeasurements(); |
| assertPerformance(); |
| widgetFactory.done(); |
| } |
| } |