Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2011 Wind River Systems, Inc. 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: * Wind River Systems - initial API and implementation *******************************************************************************/ package org.eclipse.tm.internal.tcf.debug.ui; import java.net.URL; import java.util.HashMap; import java.util.Map; import org.eclipse.core.runtime.FileLocator; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Platform; import org.eclipse.jface.resource.CompositeImageDescriptor; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.Point; import org.eclipse.ui.PlatformUI; import org.osgi.framework.Bundle; public class ImageCache { public static final String IMG_TCF = "icons/tcf.gif", IMG_TARGET_TAB = "icons/target_tab.gif", IMG_TARGET_WIZARD = "icons/full/wizban/debug_wiz.png", IMG_ARGUMENTS_TAB = "icons/arguments_tab.gif", IMG_ATTRIBUTE = "icons/attribute.gif", IMG_PATH = "icons/path.gif", IMG_THREAD_TERMINATED = "icons/full/obj16/threadt_obj.gif", IMG_THREAD_SUSPENDED = "icons/full/obj16/threads_obj.gif", IMG_THREAD_RUNNNIG = "icons/full/obj16/thread_obj.gif", IMG_THREAD_NOT_ACTIVE = "icons/thread_not_active.gif", IMG_THREAD_UNKNOWN_STATE = "icons/thread_not_active.gif", IMG_PROCESS_TERMINATED = "icons/full/obj16/debugtt_obj.gif", IMG_PROCESS_SUSPENDED = "icons/full/obj16/debugts_obj.gif", IMG_PROCESS_RUNNING = "icons/full/obj16/debugt_obj.gif", IMG_REGISTER = "icons/full/obj16/genericregister_obj.gif", IMG_VARIABLE = "icons/var_simple.gif", IMG_VARIABLE_POINTER = "icons/var_pointer.gif", IMG_VARIABLE_AGGREGATE = "icons/var_aggr.gif", IMG_SIGNALS = "icons/signals.gif", IMG_MEMORY_MAP = "icons/memory-map.gif", IMG_ARRAY_PARTITION = "icons/full/obj16/arraypartition_obj.gif", IMG_STACK_FRAME_SUSPENDED = "icons/full/obj16/stckframe_obj.gif", IMG_STACK_FRAME_RUNNING = "icons/full/obj16/stckframe_running_obj.gif", IMG_BREAKPOINT_ENABLED = "icons/full/obj16/brkp_obj.gif", IMG_BREAKPOINT_DISABLED = "icons/full/obj16/brkpd_obj.gif", IMG_BREAKPOINT_INSTALLED = "icons/ovr16/installed_ovr.gif", IMG_BREAKPOINT_CONDITIONAL = "icons/ovr16/conditional_ovr.gif", IMG_BREAKPOINT_WARNING = "icons/ovr16/warning_ovr.gif", IMG_BREAKPOINT_ERROR = "icons/ovr16/error_ovr.gif", IMG_BREAKPOINT_OVERLAY = "icons/brkp_ovr.gif"; private static final Map<String, ImageDescriptor> desc_cache = new HashMap<String, ImageDescriptor>(); private static final Map<ImageDescriptor, Image> image_cache = new HashMap<ImageDescriptor, Image>(); private static final Map<String, Map<ImageDescriptor, ImageDescriptor>> overlay_cache = new HashMap<String, Map<ImageDescriptor, ImageDescriptor>>(); public static synchronized ImageDescriptor getImageDescriptor(String name) { if (name == null) return null; ImageDescriptor descriptor = desc_cache.get(name); if (descriptor == null) { Bundle bundle = Platform.getBundle(Activator.PLUGIN_ID); if (bundle != null) { URL url = FileLocator.find(bundle, new Path(name), null); if (url != null) descriptor = ImageDescriptor.createFromURL(url); } if (descriptor == null) { bundle = Platform.getBundle("org.eclipse.debug.ui"); if (bundle != null) { URL url = FileLocator.find(bundle, new Path(name), null); if (url != null) descriptor = ImageDescriptor.createFromURL(url); } } if (descriptor == null) { bundle = Platform.getBundle("org.eclipse.cdt.debug.ui"); if (bundle != null) { URL url = FileLocator.find(bundle, new Path(name), null); if (url != null) descriptor = ImageDescriptor.createFromURL(url); } } if (descriptor == null) { descriptor = PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(name); } if (descriptor == null) { descriptor = ImageDescriptor.getMissingImageDescriptor(); } desc_cache.put(name, descriptor); } return descriptor; } public static synchronized ImageDescriptor addOverlay(ImageDescriptor descriptor, String name) { return addOverlay(descriptor, name, 0, 0); } public static synchronized ImageDescriptor addOverlay(ImageDescriptor descriptor, String name, final int x, final int y) { if (descriptor == null || name == null) return descriptor; String key = name + ':' + x + ':' + y; Map<ImageDescriptor, ImageDescriptor> map = overlay_cache.get(key); if (map == null) overlay_cache.put(key, map = new HashMap<ImageDescriptor, ImageDescriptor>()); ImageDescriptor res = map.get(descriptor); if (res != null) return res; final ImageData base = descriptor.getImageData(); final ImageData overlay = getImageDescriptor(name).getImageData(); res = new CompositeImageDescriptor() { @Override protected void drawCompositeImage(int width, int height) { drawImage(base, 0, 0); drawImage(overlay, x, y); } @Override protected Point getSize() { return new Point(base.width, base.height); } }; map.put(descriptor, res); return res; } public static synchronized Image getImage(ImageDescriptor desc) { Image image = image_cache.get(desc); if (image == null) { image = desc.createImage(); image_cache.put(desc, image); } return image; } public static synchronized Image getImage(String name) { return getImage(getImageDescriptor(name)); } }