| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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 org.eclipse.swt.snippets; |
| |
| /* |
| * Clipboard example snippet: enable/disable menu depending on clipboard content availability |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.0 |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.dnd.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet122 { |
| |
| public static void main(String[] args) { |
| Display display = new Display(); |
| final Clipboard cb = new Clipboard(display); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| final Text text = new Text(shell, SWT.BORDER | SWT.MULTI | SWT.WRAP); |
| Menu menu = new Menu(shell, SWT.POP_UP); |
| final MenuItem copyItem = new MenuItem(menu, SWT.PUSH); |
| copyItem.setText("Copy"); |
| copyItem.addSelectionListener(new SelectionAdapter(){ |
| public void widgetSelected(SelectionEvent e) { |
| String selection = text.getSelectionText(); |
| if (selection.length() == 0) return; |
| Object[] data = new Object[]{selection}; |
| Transfer[] types = new Transfer[] {TextTransfer.getInstance()}; |
| cb.setContents(data, types); |
| } |
| }); |
| final MenuItem pasteItem = new MenuItem(menu, SWT.PUSH); |
| pasteItem.setText ("Paste"); |
| pasteItem.addSelectionListener(new SelectionAdapter(){ |
| public void widgetSelected(SelectionEvent e) { |
| String string = (String)(cb.getContents(TextTransfer.getInstance())); |
| if (string != null) text.insert(string); |
| } |
| }); |
| menu.addMenuListener(new MenuAdapter() { |
| public void menuShown(MenuEvent e) { |
| // is copy valid? |
| String selection = text.getSelectionText(); |
| copyItem.setEnabled(selection.length() > 0); |
| // is paste valid? |
| TransferData[] available = cb.getAvailableTypes(); |
| boolean enabled = false; |
| for (int i = 0; i < available.length; i++) { |
| if (TextTransfer.getInstance().isSupportedType(available[i])) { |
| enabled = true; |
| break; |
| } |
| } |
| pasteItem.setEnabled(enabled); |
| } |
| }); |
| text.setMenu (menu); |
| |
| shell.setSize(200, 200); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| cb.dispose(); |
| display.dispose(); |
| } |
| } |