Java Tutorial/SWT/Clipboard
<source lang="java">
/*******************************************************************************
* 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 *******************************************************************************/
/*
* 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.SWT; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.dnd.TransferData; import org.eclipse.swt.events.MenuAdapter; import org.eclipse.swt.events.MenuEvent; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class MenuDisableEnableClipBoard {
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(); }
}</source>
Using ClipBoard to copy and paste
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class ClipBoardCopyPaster { public static void main( String[] args) {
Display display = new Display (); final Clipboard cb = new Clipboard(display); final Shell shell = new Shell (display); final Text text = new Text(shell, SWT.BORDER | SWT.SINGLE); text.setBounds(5,5,100,20); Button copy = new Button(shell, SWT.PUSH); copy.setBounds(5,50,100,20); copy.setText("Copy"); copy.addListener (SWT.Selection, new Listener () { public void handleEvent (Event e) { String textData = text.getSelectionText(); if (textData.length() > 0) { TextTransfer textTransfer = TextTransfer.getInstance(); cb.setContents(new Object[]{textData}, new Transfer[]{textTransfer}); } } }); Button paste = new Button(shell, SWT.PUSH); paste.setBounds(5,90,100,20); paste.setText("Paste"); paste.addListener (SWT.Selection, new Listener () { public void handleEvent (Event e) { TextTransfer transfer = TextTransfer.getInstance(); String data = (String)cb.getContents(transfer); if (data != null) { text.insert(data); } } }); shell.setSize(200, 200); shell.open(); while (!shell.isDisposed ()) { if (!display.readAndDispatch ()) display.sleep (); } cb.dispose(); display.dispose();
} }</source>