| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.custom.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| /* |
| * Scroll a widget into view on focus in |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.0 |
| */ |
| |
| public class Snippet188 { |
| |
| public static void main (String [] args) { |
| Display display = new Display (); |
| Shell shell = new Shell (display); |
| shell.setLayout(new GridLayout()); |
| final ScrolledComposite sc = new ScrolledComposite(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL); |
| sc.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); |
| Composite c = new Composite(sc, SWT.NONE); |
| c.setLayout(new GridLayout(10, true)); |
| for (int i = 0 ; i < 300; i++) { |
| Button b = new Button(c, SWT.PUSH); |
| b.setText("Button "+i); |
| } |
| sc.setContent(c); |
| sc.setExpandHorizontal(true); |
| sc.setExpandVertical(true); |
| sc.setMinSize(c.computeSize(SWT.DEFAULT, SWT.DEFAULT)); |
| |
| Listener listener = new Listener() { |
| public void handleEvent(Event e) { |
| Control child = (Control)e.widget; |
| Rectangle bounds = child.getBounds(); |
| Rectangle area = sc.getClientArea(); |
| Point origin = sc.getOrigin(); |
| if (origin.x > bounds.x) origin.x = Math.max(0, bounds.x); |
| if (origin.y > bounds.y) origin.y = Math.max(0, bounds.y); |
| if (origin.x + area.width < bounds.x + bounds.width) origin.x = Math.max(0, bounds.x + bounds.width - area.width); |
| if (origin.y + area.height < bounds.y + bounds.height) origin.y = Math.max(0, bounds.y + bounds.height - area.height); |
| sc.setOrigin(origin); |
| } |
| }; |
| Control[] controls = c.getChildren(); |
| for (int i = 0; i < controls.length; i++) { |
| controls[i].addListener(SWT.Activate, listener); |
| } |
| |
| shell.setSize(300, 500); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| display.dispose (); |
| } |
| } |