| /******************************************************************************* |
| * Copyright (c) 2000, 2007 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.ui.internal.dialogs; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.ui.IWorkbenchPropertyPage; |
| import org.eclipse.ui.internal.WorkbenchMessages; |
| import org.eclipse.ui.internal.misc.StatusUtil; |
| import org.eclipse.ui.internal.preferences.WorkbenchPreferenceExtensionNode; |
| import org.eclipse.ui.statushandlers.StatusManager; |
| |
| /** |
| * Property page node allows us to achieve presence in the property page dialog |
| * without loading the page itself, thus loading the contributing plugin. |
| * Only when the user selects the page will it be loaded. |
| */ |
| public class PropertyPageNode extends WorkbenchPreferenceExtensionNode { |
| private RegistryPageContributor contributor; |
| |
| private IWorkbenchPropertyPage page; |
| |
| private Image icon; |
| |
| private Object element; |
| |
| /** |
| * Create a new instance of the receiver. |
| * @param contributor |
| * @param element |
| */ |
| public PropertyPageNode(RegistryPageContributor contributor, |
| Object element) { |
| super(contributor.getPageId(), contributor.getConfigurationElement()); |
| this.contributor = contributor; |
| this.element = element; |
| } |
| |
| /** |
| * Creates the preference page this node stands for. If the page is null, |
| * it will be created by loading the class. If loading fails, |
| * empty filler page will be created instead. |
| */ |
| public void createPage() { |
| try { |
| page = contributor.createPage(element); |
| } catch (CoreException e) { |
| // Just inform the user about the error. The details are |
| // written to the log by now. |
| IStatus errStatus = StatusUtil.newStatus(e.getStatus(), WorkbenchMessages.PropertyPageNode_errorMessage); |
| StatusManager.getManager().handle(errStatus, StatusManager.SHOW); |
| page = new EmptyPropertyPage(); |
| } |
| setPage(page); |
| } |
| |
| /** (non-Javadoc) |
| * Method declared on IPreferenceNode. |
| */ |
| public void disposeResources() { |
| |
| if (page != null) { |
| page.dispose(); |
| page = null; |
| } |
| if (icon != null) { |
| icon.dispose(); |
| icon = null; |
| } |
| } |
| |
| /** |
| * Returns page icon, if defined. |
| */ |
| public Image getLabelImage() { |
| if (icon == null) { |
| ImageDescriptor desc = contributor.getPageIcon(); |
| if (desc != null) { |
| icon = desc.createImage(); |
| } |
| } |
| return icon; |
| } |
| |
| /** |
| * Returns page label as defined in the registry. |
| */ |
| public String getLabelText() { |
| return contributor.getPageName(); |
| } |
| } |