Java tutorial
/* * NodeCheckboxTreeViewer.java * * This file is part of the STS-Tool project. * Copyright (c) 2011-2012 "University of Trento - DISI" All rights reserved. * * Is strictly forbidden to remove this copyright notice from this source code. * * Disclaimer of Warranty: * STS-Tool (this software) is provided "as-is" and without warranty of any kind, * express, implied or otherwise, including without limitation, any warranty of * merchantability or fitness for a particular purpose. * In no event shall the copyright holder or contributors be liable for any direct, * indirect, incidental, special, exemplary, or consequential damages * including, but not limited to, procurement of substitute goods or services; * loss of use, data, or profits; or business interruption) however caused and on * any theory of liability, whether in contract, strict liability, or tort (including * negligence or otherwise) arising in any way out of the use of this software, even * if advised of the possibility of such damage. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * "University of Trento - DISI","University of Trento - DISI" DISCLAIMS THE * WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. * * See the GNU Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License * along with this program; if not, see http://www.gnu.org/licenses or write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA, 02110-1301 USA, or download the license from the following URL: * http://www.sts-tool.eu/License.php * * For more information, please contact STS-Tool group at this * address: ststool@disi.unitn.it * */ package eu.aniketos.wp1.ststool.report.wizard; import java.util.ArrayList; import java.util.List; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTreeViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.ICheckStateProvider; import org.eclipse.jface.viewers.IColorProvider; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Tree; public class NodeCheckboxTreeViewer { final CheckboxTreeViewer checkboxTreeViewer; public NodeCheckboxTreeViewer(Composite parent) { checkboxTreeViewer = new CheckboxTreeViewer(parent, SWT.BORDER); checkboxTreeViewer.setContentProvider(new TreeProvider()); checkboxTreeViewer.setLabelProvider(new TreeProvider()); checkboxTreeViewer.setCheckStateProvider(new TreeProvider()); checkboxTreeViewer.expandAll(); checkboxTreeViewer.addCheckStateListener(new ICheckStateListener() { public void checkStateChanged(CheckStateChangedEvent event) { Node n = (Node) event.getElement(); boolean checked = event.getChecked(); if (!n.isModificable()) { event.getCheckable().setChecked(n, !checked); return; } else { n.setCheked(checked); for (Node ch : n.getChildren()) { ch.setCheked(checked); } checkboxTreeViewer.setSubtreeChecked(event.getElement(), checked); if (n.getParent() != null) { checkboxTreeViewer.setChecked(n.getParent(), true); n.getParent().setCheked(true); } } } }); checkboxTreeViewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { IStructuredSelection s = (IStructuredSelection) event.getSelection(); if (s.getFirstElement() != null && !((Node) s.getFirstElement()).isModificable()) checkboxTreeViewer.setSelection(StructuredSelection.EMPTY); } }); } public Tree getTree() { return checkboxTreeViewer.getTree(); } public void setInputNode(Node n) { checkboxTreeViewer.setInput(n); checkboxTreeViewer.expandAll(); } public List<Node> getSelected() { List<Node> result = new ArrayList<Node>(); for (Object o : checkboxTreeViewer.getCheckedElements()) result.add((Node) o); return result; } private class TreeProvider implements ITreeContentProvider, ILabelProvider, IColorProvider, ICheckStateProvider { public Object[] getChildren(Object element) { if (element instanceof Node) { return ((Node) element).getChildren().toArray(); } else return new Object[0]; } public Object getParent(Object element) { if (element instanceof Node && !((Node) element).isRoot()) { return ((Node) element).getParent(); } else return null; } public boolean hasChildren(Object element) { if (element instanceof Node) { return ((Node) element).hasCildren(); } else return false; } public Object[] getElements(Object element) { if (element instanceof Node && ((Node) element).isRoot()) { return ((Node) element).getChildren().toArray(); } else return new Object[0]; } @Override public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } public Image getImage(Object element) { return null; } public String getText(Object element) { if (element instanceof Node) { return ((Node) element).getData(); } else return ""; } public void addListener(ILabelProviderListener element) { } public void dispose() { } public boolean isLabelProperty(Object element, String arg1) { return false; } public void removeListener(ILabelProviderListener arg0) { } Color c = new Color(Display.getDefault(), 130, 130, 130); @Override public Color getForeground(Object element) { if (element instanceof Node && !((Node) element).isModificable()) { return c; } return null; } @Override public Color getBackground(Object element) { // TODO Auto-generated method stub return null; } @Override public boolean isChecked(Object element) { if (element instanceof Node) { return ((Node) element).isChecked(); } else return false; } @Override public boolean isGrayed(Object element) { return false; } } }