Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2009 Spring IDE Developers * 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: * Spring IDE Developers - initial API and implementation *******************************************************************************/ package org.springframework.ide.eclipse.beans.ui.graph; import java.net.MalformedURLException; import java.net.URL; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.eclipse.jface.action.IAction; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.resource.ImageRegistry; import org.eclipse.swt.graphics.Image; /** * @author Christian Dupuis */ public class BeansGraphImages { private static final String ICON_PATH_PREFIX = "icons/full/"; private static final String NAME_PREFIX = BeansGraphPlugin.PLUGIN_ID + '.'; private static final int NAME_PREFIX_LENGTH = NAME_PREFIX.length(); /* Declare Common paths */ private static URL ICON_BASE_URL = null; static { try { ICON_BASE_URL = new URL(BeansGraphPlugin.getDefault().getBundle().getEntry("/"), ICON_PATH_PREFIX); } catch (MalformedURLException e) { BeansGraphPlugin.log(e); } } /** * A table of all the <code>ImageDescriptor</code>s. */ private static Map imageDescriptors; /** * The image registry containing <code>Image</code>s. */ private static ImageRegistry imageRegistry; /* * Available cached Images in the Java plugin image registry. */ public static final String IMG_OBJS_EXPORT_ENABLED = NAME_PREFIX + "export_wiz_obj.gif"; public static final String IMG_OBJS_EXPORT_DISABLED = NAME_PREFIX + "export_wiz.gif"; public static final String IMG_OBJS_BEANS_GRAPH = NAME_PREFIX + "beans_graph_obj.gif"; // Use IPath and toOSString to build the names to ensure they have the // slashes correct // private final static String CTOOL = "ctool16/"; //basic colors - size // 16x16 // private final static String LOCALTOOL = "clcl16/"; //basic colors - size // 16x16 // private final static String DLCL = "dlcl16/"; //disabled - size 16x16 // private final static String ELCL = "elcl16/"; //enabled - size 16x16 private final static String OBJECT = "obj16/"; // basic colors - size // 16x16 // private final static String WIZBAN = "wizban/"; //basic colors - size // 16x16 // private final static String OVR = "ovr16/"; //basic colors - size 7x8 // private final static String VIEW= "cview16/"; // views //$NON-NLS-1$ public static final ImageDescriptor DESC_OBJS_EXPORT_ENABLED = createManaged(OBJECT, IMG_OBJS_EXPORT_ENABLED); public static final ImageDescriptor DESC_OBJS_EXPORT_DISABLED = createManaged(OBJECT, IMG_OBJS_EXPORT_DISABLED); public static final ImageDescriptor DESC_OBJS_BEANS_GPRAH = createManaged(OBJECT, IMG_OBJS_BEANS_GRAPH); /** * Returns the <code>Image<code> identified by the given key, * or <code>null</code> if it does not exist. * * @param key * * @return */ public static Image getImage(String key) { return getImageRegistry().get(key); } /** * Sets the three image descriptors for enabled, disabled, and hovered to an action. The actions are retrieved from * the *tool16 folders. * * @param action * @param iconName */ public static void setToolImageDescriptors(IAction action, String iconName) { setImageDescriptors(action, "tool16", iconName); } /** * Sets the three image descriptors for enabled, disabled, and hovered to an action. The actions are retrieved from * the *lcl16 folders. * * @param action * @param iconName */ public static void setLocalImageDescriptors(IAction action, String iconName) { setImageDescriptors(action, "lcl16", iconName); } /* * Helper method to access the image registry from the JavaPlugin class. */ public static ImageRegistry getImageRegistry() { if (imageRegistry == null) { imageRegistry = new ImageRegistry(); for (Iterator iter = imageDescriptors.keySet().iterator(); iter.hasNext();) { String key = (String) iter.next(); imageRegistry.put(key, (ImageDescriptor) imageDescriptors.get(key)); } imageDescriptors = null; } return imageRegistry; } // ---- Helper methods to access icons on the file system // ------------------- private static void setImageDescriptors(IAction action, String type, String relPath) { try { ImageDescriptor id = ImageDescriptor.createFromURL(makeIconFileURL("d" + type, relPath)); if (id != null) { action.setDisabledImageDescriptor(id); } } catch (MalformedURLException e) { BeansGraphPlugin.log(e); } /* * try { ImageDescriptor id = ImageDescriptor.createFromURL(makeIconFileURL( "c" + type, relPath)); if (id != * null) { action.setHoverImageDescriptor(id); } } catch (MalformedURLException e) { BeansGraphPlugin.log(e); } */ action.setImageDescriptor(create("e" + type, relPath)); } @SuppressWarnings("unchecked") private static ImageDescriptor createManaged(String prefix, String name) { try { ImageDescriptor result = ImageDescriptor .createFromURL(makeIconFileURL(prefix, name.substring(NAME_PREFIX_LENGTH))); if (imageDescriptors == null) { imageDescriptors = new HashMap(); } imageDescriptors.put(name, result); if (imageRegistry != null) { BeansGraphPlugin.log("Image registry already defined", null); } return result; } catch (MalformedURLException e) { BeansGraphPlugin.log(e); return ImageDescriptor.getMissingImageDescriptor(); } } private static ImageDescriptor create(String prefix, String name) { try { return ImageDescriptor.createFromURL(makeIconFileURL(prefix, name)); } catch (MalformedURLException e) { BeansGraphPlugin.log(e); return ImageDescriptor.getMissingImageDescriptor(); } } private static URL makeIconFileURL(String prefix, String name) throws MalformedURLException { if (ICON_BASE_URL == null) { throw new MalformedURLException(); } StringBuffer buffer = new StringBuffer(prefix); buffer.append('/'); buffer.append(name); return new URL(ICON_BASE_URL, buffer.toString()); } }