| /******************************************************************************* |
| * Copyright 2005-2007, CHISEL Group, University of Victoria, Victoria, BC, |
| * Canada. 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: The Chisel Group, University of Victoria |
| ******************************************************************************/ |
| package org.eclipse.zest.tests.jface; |
| |
| |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.events.SelectionListener; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.zest.core.viewers.EntityConnectionData; |
| import org.eclipse.zest.core.viewers.GraphViewer; |
| import org.eclipse.zest.core.viewers.IGraphEntityContentProvider; |
| import org.eclipse.zest.core.viewers.INestedContentProvider; |
| import org.eclipse.zest.layouts.LayoutStyles; |
| import org.eclipse.zest.layouts.algorithms.SpringLayoutAlgorithm; |
| |
| /** |
| * This snippet shows how to use the INestedGraphContentProvider to create a graph |
| * with Zest. In this example, getElements returns 3 edges: * Rock2Paper * |
| * Paper2Scissors * Scissors2Rock |
| * |
| * And for each of these, the source and destination are returned in getSource |
| * and getDestination. |
| * |
| * A label provider is also used to create the text and icons for the graph. |
| * |
| * @author Ian Bull |
| * |
| */ |
| public class GraphJFaceSnippet6 { |
| |
| static class MyContentProvider implements IGraphEntityContentProvider, INestedContentProvider { |
| |
| public Object[] getConnectedTo(Object entity) { |
| if (entity.equals("First")) { |
| return new Object[] { "Second" }; |
| } |
| if (entity.equals("Second")) { |
| return new Object[] { "Third", "rock" }; |
| } |
| if (entity.equals("Third")) { |
| return new Object[] { "First" }; |
| } |
| if ( entity.equals("rock")) { |
| return new Object[] { "paper" }; |
| } |
| return null; |
| } |
| |
| public Object[] getElements(Object inputElement) { |
| return new String[] { "First", "Second", "Third" }; |
| } |
| |
| public double getWeight(Object entity1, Object entity2) { |
| return 0; |
| } |
| |
| public void dispose() { |
| |
| } |
| |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| |
| } |
| |
| public Object[] getChildren(Object element) { |
| // TODO Auto-generated method stub |
| return new Object[] {"rock", "paper", "scissors"}; |
| } |
| |
| public boolean hasChildren(Object element) { |
| // TODO Auto-generated method stub |
| if ( element.equals("First")) return true; |
| return false; |
| } |
| |
| } |
| |
| static class MyLabelProvider extends LabelProvider { |
| final Image image = Display.getDefault().getSystemImage(SWT.ICON_WARNING); |
| |
| public Image getImage(Object element) { |
| if (element.equals("Rock") || element.equals("Paper") || element.equals("Scissors")) { |
| return image; |
| } |
| return null; |
| } |
| |
| public String getText(Object element) { |
| if ( element instanceof EntityConnectionData ) return ""; |
| return element.toString(); |
| } |
| |
| } |
| |
| static GraphViewer viewer = null; |
| |
| /** |
| * @param args |
| */ |
| public static void main(String[] args) { |
| Display d = new Display(); |
| Shell shell = new Shell(d); |
| shell.setText("GraphJFaceSnippet2"); |
| shell.setLayout(new FillLayout(SWT.VERTICAL)); |
| shell.setSize(400, 400); |
| viewer = new GraphViewer(shell, SWT.NONE); |
| viewer.setContentProvider(new MyContentProvider()); |
| viewer.setLabelProvider(new MyLabelProvider()); |
| viewer.setLayoutAlgorithm(new SpringLayoutAlgorithm(LayoutStyles.NO_LAYOUT_NODE_RESIZING)); |
| viewer.setInput(new Object()); |
| |
| Button button = new Button(shell, SWT.PUSH); |
| button.setText("push"); |
| button.addSelectionListener(new SelectionListener() { |
| |
| public void widgetDefaultSelected(SelectionEvent e) { |
| } |
| |
| public void widgetSelected(SelectionEvent e) { |
| viewer.setInput(new Object()); |
| } |
| |
| }); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| while (!d.readAndDispatch()) { |
| d.sleep(); |
| } |
| } |
| |
| } |
| |
| } |