snippet124.java

Eclipse JAVA开发软件中SWT各控件范例源码

/*******************************************************************************
 * 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;
 
/*
 * TableEditor example snippet: edit a cell in a table (in place, fancy)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.custom.*;

public class Snippet124 {
public static void main (String[] args) {
	Display display = new Display ();
	Shell shell = new Shell (display);
	shell.setLayout (new FillLayout ());
	final Table table = new Table(shell, SWT.BORDER | SWT.MULTI);
	table.setLinesVisible (true);
	for (int i=0; i<3; i++) {
		TableColumn column = new TableColumn (table, SWT.NONE);
		column.setWidth(100);
	}
	for (int i=0; i<3; i++) {
		TableItem item = new TableItem (table, SWT.NONE);
		item.setText(new String [] {"" + i, "" + i , "" + i});
	}
	final TableEditor editor = new TableEditor (table);
	editor.horizontalAlignment = SWT.LEFT;
	editor.grabHorizontal = true;
	table.addListener (SWT.MouseDown, new Listener () {
		public void handleEvent (Event event) {
			Rectangle clientArea = table.getClientArea ();
			Point pt = new Point (event.x, event.y);
			int index = table.getTopIndex ();
			while (index < table.getItemCount ()) {
				boolean visible = false;
				final TableItem item = table.getItem (index);
				for (int i=0; i<table.getColumnCount (); i++) {
					Rectangle rect = item.getBounds (i);
					if (rect.contains (pt)) {
						final int column = i;
						final Text text = new Text (table, SWT.NONE);
						Listener textListener = new Listener () {
							public void handleEvent (final Event e) {
								switch (e.type) {
									case SWT.FocusOut:
										item.setText (column, text.getText ());
										text.dispose ();
										break;
									case SWT.Traverse:
										switch (e.detail) {
											case SWT.TRAVERSE_RETURN:
												item.setText (column, text.getText ());
												//FALL THROUGH
											case SWT.TRAVERSE_ESCAPE:
												text.dispose ();
												e.doit = false;
										}
										break;
								}
							}
						};
						text.addListener (SWT.FocusOut, textListener);
						text.addListener (SWT.Traverse, textListener);
						editor.setEditor (text, item, i);
						text.setText (item.getText (i));
						text.selectAll ();
						text.setFocus ();
						return;
					}
					if (!visible && rect.intersects (clientArea)) {
						visible = true;
					}
				}
				if (!visible) return;
				index++;
			}
		}
	});
	shell.pack ();
	shell.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}