Richard S. Hall | bad49dc | 2007-07-13 16:08:06 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.apache.felix.example.servicebased.triangle; |
| 20 | |
| 21 | import java.awt.BasicStroke; |
| 22 | import java.awt.Color; |
| 23 | import java.awt.GradientPaint; |
| 24 | import java.awt.Graphics2D; |
| 25 | import java.awt.Point; |
Richard S. Hall | 57376bf | 2012-03-06 19:19:04 +0000 | [diff] [blame] | 26 | import java.awt.geom.GeneralPath; |
| 27 | import java.util.Dictionary; |
Richard S. Hall | bad49dc | 2007-07-13 16:08:06 +0000 | [diff] [blame] | 28 | import java.util.Hashtable; |
| 29 | import javax.swing.ImageIcon; |
| 30 | import org.apache.felix.example.servicebased.host.service.SimpleShape; |
Richard S. Hall | 57376bf | 2012-03-06 19:19:04 +0000 | [diff] [blame] | 31 | import org.osgi.framework.BundleActivator; |
| 32 | import org.osgi.framework.BundleContext; |
Richard S. Hall | bad49dc | 2007-07-13 16:08:06 +0000 | [diff] [blame] | 33 | |
| 34 | /** |
| 35 | * This class implements a simple bundle activator for the triangle |
| 36 | * <tt>SimpleShape</tt> service. This activator simply creates an instance |
| 37 | * of the triangle service object and registers it with the service registry |
| 38 | * along with the service properties indicating the service's name and icon. |
| 39 | **/ |
| 40 | public class Activator implements BundleActivator |
| 41 | { |
| 42 | private BundleContext m_context = null; |
| 43 | |
| 44 | /** |
| 45 | * Implements the <tt>BundleActivator.start()</tt> method, which |
| 46 | * registers the triangle <tt>SimpleShape</tt> service. |
| 47 | * @param context The context for the bundle. |
| 48 | **/ |
| 49 | public void start(BundleContext context) |
| 50 | { |
| 51 | m_context = context; |
Richard S. Hall | 57376bf | 2012-03-06 19:19:04 +0000 | [diff] [blame] | 52 | Dictionary<String, Object> dict = new Hashtable<String, Object>(); |
Richard S. Hall | bad49dc | 2007-07-13 16:08:06 +0000 | [diff] [blame] | 53 | dict.put(SimpleShape.NAME_PROPERTY, "Triangle"); |
| 54 | dict.put(SimpleShape.ICON_PROPERTY, |
| 55 | new ImageIcon(this.getClass().getResource("triangle.png"))); |
| 56 | m_context.registerService( |
| 57 | SimpleShape.class.getName(), new Triangle(), dict); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Implements the <tt>BundleActivator.start()</tt> method, which |
| 62 | * does nothing. |
| 63 | * @param context The context for the bundle. |
| 64 | **/ |
| 65 | public void stop(BundleContext context) |
| 66 | { |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * This inner class implements the triangle <tt>SimpleShape</tt> service. |
| 71 | * It simply provides a <tt>draw()</tt> that paints a triangle. |
| 72 | **/ |
| 73 | public class Triangle implements SimpleShape |
| 74 | { |
| 75 | /** |
| 76 | * Implements the <tt>SimpleShape.draw()</tt> method for painting |
| 77 | * the shape. |
| 78 | * @param g2 The graphics object used for painting. |
| 79 | * @param p The position to paint the triangle. |
| 80 | **/ |
| 81 | public void draw(Graphics2D g2, Point p) |
| 82 | { |
| 83 | int x = p.x - 25; |
| 84 | int y = p.y - 25; |
| 85 | GradientPaint gradient = new GradientPaint( |
| 86 | x, y, Color.GREEN, x + 50, y, Color.WHITE); |
| 87 | g2.setPaint(gradient); |
| 88 | int[] xcoords = { x + 25, x, x + 50 }; |
| 89 | int[] ycoords = { y, y + 50, y + 50 }; |
| 90 | GeneralPath polygon = new GeneralPath(GeneralPath.WIND_EVEN_ODD, xcoords.length); |
| 91 | polygon.moveTo(x + 25, y); |
| 92 | for (int i = 0; i < xcoords.length; i++) |
| 93 | { |
| 94 | polygon.lineTo(xcoords[i], ycoords[i]); |
| 95 | } |
| 96 | polygon.closePath(); |
| 97 | g2.fill(polygon); |
| 98 | BasicStroke wideStroke = new BasicStroke(2.0f); |
| 99 | g2.setColor(Color.black); |
| 100 | g2.setStroke(wideStroke); |
| 101 | g2.draw(polygon); |
| 102 | } |
| 103 | } |
| 104 | } |