Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2005 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 com.idega.app.eplatform; import java.util.ArrayList; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.part.*; import org.eclipse.jface.viewers.*; import org.eclipse.swt.graphics.Image; import org.eclipse.jface.action.*; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.ui.*; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.SWT; import org.eclipse.core.runtime.IAdaptable; /** * Mockup of a browser history view. * For now, it's just the sample view generated by PDE. */ public class HistoryView extends ViewPart implements ISecondaryPart { private TreeViewer viewer; private DrillDownAdapter drillDownAdapter; private Action action1; private Action action2; private Action doubleClickAction; /* * The content provider class is responsible for * providing objects to the view. It can wrap * existing objects in adapters or simply return * objects as-is. These objects may be sensitive * to the current input of the view, or ignore * it and always show the same content * (like Task List, for example). */ class TreeObject implements IAdaptable { private String name; private TreeParent parent; public TreeObject(String name) { this.name = name; } public String getName() { return name; } public void setParent(TreeParent parent) { this.parent = parent; } public TreeParent getParent() { return parent; } public String toString() { return getName(); } public Object getAdapter(Class key) { return null; } } class TreeParent extends TreeObject { private ArrayList children; public TreeParent(String name) { super(name); children = new ArrayList(); } public void addChild(TreeObject child) { children.add(child); child.setParent(this); } public void removeChild(TreeObject child) { children.remove(child); child.setParent(null); } public TreeObject[] getChildren() { return (TreeObject[]) children.toArray(new TreeObject[children.size()]); } public boolean hasChildren() { return children.size() > 0; } } class ViewContentProvider implements IStructuredContentProvider, ITreeContentProvider { private TreeParent invisibleRoot; public void inputChanged(Viewer v, Object oldInput, Object newInput) { } public void dispose() { } public Object[] getElements(Object parent) { if (parent.equals(getViewSite())) { if (invisibleRoot == null) initialize(); return getChildren(invisibleRoot); } return getChildren(parent); } public Object getParent(Object child) { if (child instanceof TreeObject) { return ((TreeObject) child).getParent(); } return null; } public Object[] getChildren(Object parent) { if (parent instanceof TreeParent) { return ((TreeParent) parent).getChildren(); } return new Object[0]; } public boolean hasChildren(Object parent) { if (parent instanceof TreeParent) return ((TreeParent) parent).hasChildren(); return false; } /* * We will set up a dummy model to initialize tree heararchy. * In a real code, you will connect to a real model and * expose its hierarchy. */ private void initialize() { TreeObject to1 = new TreeObject("Leaf 1"); TreeObject to2 = new TreeObject("Leaf 2"); TreeObject to3 = new TreeObject("Leaf 3"); TreeParent p1 = new TreeParent("Parent 1"); p1.addChild(to1); p1.addChild(to2); p1.addChild(to3); TreeObject to4 = new TreeObject("Leaf 4"); TreeParent p2 = new TreeParent("Parent 2"); p2.addChild(to4); TreeParent root = new TreeParent("Root"); root.addChild(p1); root.addChild(p2); invisibleRoot = new TreeParent(""); invisibleRoot.addChild(root); } } class ViewLabelProvider extends LabelProvider { public String getText(Object obj) { return obj.toString(); } public Image getImage(Object obj) { String imageKey = ISharedImages.IMG_OBJ_ELEMENT; if (obj instanceof TreeParent) imageKey = ISharedImages.IMG_OBJ_FOLDER; return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey); } } /** * The constructor. */ public HistoryView() { } /** * This is a callback that will allow us * to create the viewer and initialize it. */ public void createPartControl(Composite parent) { viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); drillDownAdapter = new DrillDownAdapter(viewer); viewer.setContentProvider(new ViewContentProvider()); viewer.setLabelProvider(new ViewLabelProvider()); viewer.setInput(getViewSite()); makeActions(); hookContextMenu(); hookDoubleClickAction(); } private void hookContextMenu() { MenuManager menuMgr = new MenuManager("#PopupMenu"); menuMgr.setRemoveAllWhenShown(true); menuMgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { HistoryView.this.fillContextMenu(manager); } }); Menu menu = menuMgr.createContextMenu(viewer.getControl()); viewer.getControl().setMenu(menu); getSite().registerContextMenu(menuMgr, viewer); } private void fillContextMenu(IMenuManager manager) { manager.add(action1); manager.add(action2); manager.add(new Separator()); drillDownAdapter.addNavigationActions(manager); // Other plug-ins can contribute there actions here manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } private void makeActions() { action1 = new Action() { public void run() { showMessage("Action 1 executed"); } }; action1.setText("Action 1"); action1.setToolTipText("Action 1 tooltip"); action1.setImageDescriptor( PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_OBJS_INFO_TSK)); action2 = new Action() { public void run() { showMessage("Action 2 executed"); } }; action2.setText("Action 2"); action2.setToolTipText("Action 2 tooltip"); action2.setImageDescriptor( PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_OBJS_INFO_TSK)); doubleClickAction = new Action() { public void run() { ISelection selection = viewer.getSelection(); Object obj = ((IStructuredSelection) selection).getFirstElement(); showMessage("Double-click detected on " + obj.toString()); } }; } private void hookDoubleClickAction() { viewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { doubleClickAction.run(); } }); } private void showMessage(String message) { MessageDialog.openInformation(viewer.getControl().getShell(), "History", message); } /** * Passing the focus request to the viewer's control. */ public void setFocus() { viewer.getControl().setFocus(); } }