| /******************************************************************************* |
| * 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.graphics; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class StarPolyTab extends GraphicsTab { |
| int[] radial; |
| static final int POINTS = 11; |
| |
| Combo fillRuleCb; |
| |
| public StarPolyTab(GraphicsExample example) { |
| super(example); |
| radial = new int[POINTS * 2]; |
| } |
| |
| public void createControlPanel(Composite parent) { |
| new Label(parent, SWT.NONE).setText(GraphicsExample.getResourceString("FillRule")); //$NON-NLS-1$ |
| fillRuleCb = new Combo(parent, SWT.DROP_DOWN); |
| fillRuleCb.add("FILL_EVEN_ODD"); |
| fillRuleCb.add("FILL_WINDING"); |
| fillRuleCb.select(0); |
| fillRuleCb.addListener(SWT.Selection, example.getRedrawListener()); |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Polygons"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("StarPolygon"); //$NON-NLS-1$ |
| } |
| |
| public void paint(GC gc, int width, int height) { |
| int centerX = width / 2; |
| int centerY = height / 2; |
| int pos = 0; |
| for (int i = 0; i < POINTS; ++i) { |
| double r = Math.PI*2 * pos/POINTS; |
| radial[i*2] = (int)((1+Math.cos(r))*centerX); |
| radial[i*2+1] = (int)((1+Math.sin(r))*centerY); |
| pos = (pos + POINTS/2) % POINTS; |
| } |
| Display display = Display.getCurrent(); |
| gc.setFillRule(fillRuleCb.getSelectionIndex() != 0 ? SWT.FILL_WINDING : SWT.FILL_EVEN_ODD); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_WHITE)); |
| gc.fillPolygon(radial); |
| gc.drawPolygon(radial); |
| } |
| } |