| /******************************************************************************* |
| * Copyright (c) 2006 - 2015 Tom Schindl and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation |
| * Lars Vogel <Lars.Vogel@vogella.com> - Bug 414565, 442278, 475361 |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.snippets.viewers; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.action.MenuManager; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.TreeColumn; |
| |
| /** |
| * Customized context menu based on TreeItem-Selection |
| * |
| */ |
| public class Snippet005TreeCustomMenu { |
| private class MyContentProvider implements ITreeContentProvider { |
| |
| @Override |
| public Object[] getElements(Object inputElement) { |
| return ((MyModel) inputElement).child.toArray(); |
| } |
| |
| @Override |
| public void dispose() { |
| |
| } |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| |
| } |
| |
| @Override |
| public Object[] getChildren(Object parentElement) { |
| return getElements(parentElement); |
| } |
| |
| @Override |
| public Object getParent(Object element) { |
| if (element == null) { |
| return null; |
| } |
| |
| return ((MyModel) element).parent; |
| } |
| |
| @Override |
| public boolean hasChildren(Object element) { |
| return ((MyModel) element).child.size() > 0; |
| } |
| |
| } |
| |
| public class MyModel { |
| public MyModel parent; |
| |
| public List<MyModel> child = new ArrayList<>(); |
| |
| public int counter; |
| |
| public MyModel(int counter, MyModel parent) { |
| this.parent = parent; |
| this.counter = counter; |
| } |
| |
| @Override |
| public String toString() { |
| String rv = "Item "; |
| if (parent != null) { |
| rv = parent + "."; |
| } |
| |
| rv += counter; |
| |
| return rv; |
| } |
| } |
| |
| public Snippet005TreeCustomMenu(Shell shell) { |
| final TreeViewer v = new TreeViewer(shell); |
| v.setLabelProvider(new LabelProvider()); |
| v.setContentProvider(new MyContentProvider()); |
| v.setInput(createModel()); |
| createColumn(v.getTree(), "Values"); |
| |
| final Action a = new Action("") { |
| }; |
| final MenuManager mgr = new MenuManager(); |
| mgr.setRemoveAllWhenShown(true); |
| |
| mgr.addMenuListener(manager -> { |
| IStructuredSelection selection = v.getStructuredSelection(); |
| if (!selection.isEmpty()) { |
| a.setText("Action for " + selection.getFirstElement()); |
| mgr.add(a); |
| } |
| }); |
| v.getControl().setMenu(mgr.createContextMenu(v.getControl())); |
| } |
| |
| public void createColumn(Tree tr, String text) { |
| TreeColumn column = new TreeColumn(tr, SWT.NONE); |
| column.setWidth(100); |
| column.setText(text); |
| tr.setHeaderVisible(true); |
| } |
| |
| private MyModel createModel() { |
| |
| MyModel root = new MyModel(0, null); |
| root.counter = 0; |
| |
| MyModel tmp; |
| for (int i = 1; i < 10; i++) { |
| tmp = new MyModel(i, root); |
| root.child.add(tmp); |
| for (int j = 1; j < i; j++) { |
| tmp.child.add(new MyModel(j, tmp)); |
| } |
| } |
| |
| return root; |
| } |
| |
| public static void main(String[] args) { |
| Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| new Snippet005TreeCustomMenu(shell); |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| |
| display.dispose(); |
| } |
| } |