| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.swt.examples.paint; |
| |
| |
| import java.util.Random; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * An airbrush tool. |
| */ |
| public class AirbrushTool extends ContinuousPaintSession implements PaintTool { |
| private ToolSettings settings; |
| private Random random; |
| private int cachedRadiusSquared; |
| private int cachedNumPoints; |
| |
| /** |
| * Constructs a Tool. |
| * |
| * @param toolSettings the new tool settings |
| * @param paintSurface the PaintSurface we will render on. |
| */ |
| public AirbrushTool(ToolSettings toolSettings, PaintSurface paintSurface) { |
| super(paintSurface); |
| random = new Random(); |
| setRetriggerTimer(10); |
| set(toolSettings); |
| } |
| |
| /** |
| * Sets the tool's settings. |
| * |
| * @param toolSettings the new tool settings |
| */ |
| public void set(ToolSettings toolSettings) { |
| // compute things we need to know for drawing |
| settings = toolSettings; |
| cachedRadiusSquared = settings.airbrushRadius * settings.airbrushRadius; |
| cachedNumPoints = 314 * settings.airbrushIntensity * cachedRadiusSquared / 250000; |
| if (cachedNumPoints == 0 && settings.airbrushIntensity != 0) |
| cachedNumPoints = 1; |
| } |
| |
| /** |
| * Returns the name associated with this tool. |
| * |
| * @return the localized name of this tool |
| */ |
| public String getDisplayName() { |
| return PaintExample.getResourceString("tool.Airbrush.label"); |
| } |
| |
| /* |
| * Template method for drawing |
| */ |
| protected void render(Point point) { |
| // Draws a bunch (cachedNumPoints) of random pixels within a specified circle (cachedRadiusSquared). |
| ContainerFigure cfig = new ContainerFigure(); |
| |
| for (int i = 0; i < cachedNumPoints; ++i) { |
| int randX, randY; |
| do { |
| randX = (int) ((random.nextDouble() - 0.5) * settings.airbrushRadius * 2.0); |
| randY = (int) ((random.nextDouble() - 0.5) * settings.airbrushRadius * 2.0); |
| } while (randX * randX + randY * randY > cachedRadiusSquared); |
| cfig.add(new PointFigure(settings.commonForegroundColor, point.x + randX, point.y + randY)); |
| } |
| getPaintSurface().drawFigure(cfig); |
| } |
| } |