Java tutorial
/******************************************************************************* * Copyright (c) 2000-2011 IBM Corporation and others, eBay Inc. * 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 * eBay Inc - modification *******************************************************************************/ package org.eclipse.dltk.mod.ui.browsing; import java.util.Iterator; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.dltk.mod.core.DLTKCore; import org.eclipse.dltk.mod.core.DLTKLanguageManager; import org.eclipse.dltk.mod.core.IDLTKLanguageToolkit; import org.eclipse.dltk.mod.core.IModelElement; import org.eclipse.dltk.mod.core.IProjectFragment; import org.eclipse.dltk.mod.core.IScriptModel; import org.eclipse.dltk.mod.core.IScriptProject; import org.eclipse.dltk.mod.internal.ui.actions.ProjectActionGroup; import org.eclipse.dltk.mod.ui.DLTKUIPlugin; import org.eclipse.dltk.mod.ui.PreferenceConstants; import org.eclipse.dltk.mod.ui.viewsupport.FilterUpdater; import org.eclipse.dltk.mod.ui.viewsupport.ProblemTreeViewer; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IContentProvider; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.IWorkbenchPart; public class ProjectsView extends ScriptBrowsingPart { private FilterUpdater fFilterUpdater; /* * (non-Javadoc) * * @see * org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#createViewer(org * .eclipse.swt.widgets.Composite) */ protected StructuredViewer createViewer(Composite parent) { ProblemTreeViewer result = new ProblemTreeViewer(parent, SWT.MULTI); // ColoredViewersManager.install(result); fFilterUpdater = new FilterUpdater(result); ResourcesPlugin.getWorkspace().addResourceChangeListener(fFilterUpdater); return result; } /* * (non-Javadoc) * * @see org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#dispose() */ public void dispose() { if (fFilterUpdater != null) ResourcesPlugin.getWorkspace().removeResourceChangeListener(fFilterUpdater); super.dispose(); } /* * (non-Javadoc) * * @see * org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#getAdapter(java * .lang.Class) */ public Object getAdapter(Class key) { // if (key == IShowInTargetList.class) { // return new IShowInTargetList() { // public String[] getShowInTargetIds() { // return new String[] { JavaUI.ID_PACKAGES, IPageLayout.ID_RES_NAV }; // } // // }; // } return super.getAdapter(key); } /* * (non-Javadoc) * * @see * org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart#createContentProvider * () */ protected IContentProvider createContentProvider() { return new ProjectAndSourceFolderContentProvider(this, getToolkit()); } /** * Returns the context ID for the Help system. * * @return the string used as ID for the Help context */ protected String getHelpContextId() { return "org.ebayopensource.vjet.eclipse.ui.projects_view_context"; //$NON-NLS-1$ } protected String getLinkToEditorKey() { return PreferenceConstants.LINK_BROWSING_PROJECTS_TO_EDITOR; } /** * Adds additional listeners to this view. */ protected void hookViewerListeners() { super.hookViewerListeners(); getViewer().addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { TreeViewer viewer = (TreeViewer) getViewer(); Object element = ((IStructuredSelection) event.getSelection()).getFirstElement(); if (viewer.isExpandable(element)) viewer.setExpandedState(element, !viewer.getExpandedState(element)); } }); } protected void setInitialInput() { IModelElement root = DLTKCore.create(DLTKUIPlugin.getWorkspace().getRoot()); getViewer().setInput(root); updateTitle(); } /** * Answers if the given <code>element</code> is a valid input for this part. * * @param element * the object to test * @return <true> if the given element is a valid input */ protected boolean isValidInput(Object element) { return element instanceof IScriptModel; } /** * Answers if the given <code>element</code> is a valid element for this * part. * * @param element * the object to test * @return <true> if the given element is a valid element */ protected boolean isValidElement(Object element) { if (!(element instanceof IScriptProject || element instanceof IProjectFragment)) { return false; } IDLTKLanguageToolkit languageToolkit; languageToolkit = DLTKLanguageManager.getLanguageToolkit((IModelElement) element); if (languageToolkit != null) { return languageToolkit.getNatureId().equals(getToolkit().getNatureId()); } return false; } /** * Finds the element which has to be selected in this part. * * @param je * the Java element which has the focus * @return the element to select */ protected IModelElement findElementToSelect(IModelElement je) { if (je == null) return null; switch (je.getElementType()) { case IModelElement.SCRIPT_MODEL: return null; case IModelElement.SCRIPT_PROJECT: return je; case IModelElement.PROJECT_FRAGMENT: if (je.getElementName().equals(IProjectFragment.DEFAULT_PACKAGE_ROOT)) return je.getParent(); else return je; default: return findElementToSelect(je.getParent()); } } /* * @see JavaBrowsingPart#setInput(Object) */ protected void setInput(Object input) { // Don't allow to clear input for this view if (input != null) super.setInput(input); else getViewer().setSelection(null); } protected void createActions() { super.createActions(); fActionGroups.addGroup(new ProjectActionGroup(this)); } /** * Handles selection of LogicalPackage in Packages view. * * @see org.eclipse.ui.ISelectionListener#selectionChanged(org.eclipse.ui.IWorkbenchPart, * org.eclipse.jface.viewers.ISelection) * @since 2.1 */ public void selectionChanged(IWorkbenchPart part, ISelection selection) { if (!needsToProcessSelectionChanged(part, selection)) return; if (selection instanceof IStructuredSelection) { IStructuredSelection sel = (IStructuredSelection) selection; Iterator iter = sel.iterator(); while (iter.hasNext()) { Object selectedElement = iter.next(); if (selectedElement instanceof LogicalPackage) { selection = new StructuredSelection(((LogicalPackage) selectedElement).getScriptProject()); break; } } } super.selectionChanged(part, selection); } }