| /******************************************************************************* |
| * Copyright (c) 2006 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.jface.dialogs; |
| |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.graphics.Rectangle; |
| import org.eclipse.swt.widgets.Control; |
| |
| /** |
| * ControlAnimator provides a simple implementation to display or hide a control |
| * at the bottom of the parent composite. Other animations will be written as |
| * subclasses of this class. <p> |
| * Instances of this class can be created using an AnimatorFactory. |
| * |
| * @since 3.2 |
| */ |
| |
| |
| public class ControlAnimator { |
| /** the control that will be displayed or hidden */ |
| protected Control control; |
| |
| /** |
| * Constructs a new ControlAnimator instance and passes along the |
| * control that will be displayed or hidden. |
| * |
| * @param control the control that will be displayed or hidden. |
| */ |
| public ControlAnimator(Control control) { |
| this.control = control; |
| } |
| |
| /** |
| * Displays or hides a control at the bottom of the parent composite |
| * and makes use of the control's SWT visible flag.<p> |
| * Subclasses should override this method.</p> |
| * |
| * @param visible <code>true</code> if the control should be shown, |
| * and <code>false</code> otherwise. |
| */ |
| public void setVisible(boolean visible){ |
| // Using the SWT visible flag to determine if the control has |
| // already been displayed or hidden. Return if already displayed |
| // and visible is true, or if already hidden and visible is false. |
| if (!(control.isVisible() ^ visible)) |
| return; |
| control.setVisible(visible); |
| Rectangle parentBounds = control.getParent().getBounds(); |
| int bottom = parentBounds.height; |
| final int endY = visible ? bottom - control.getBounds().height |
| : bottom; |
| Point loc = control.getLocation(); |
| control.setLocation(loc.x,endY); |
| } |
| |
| } |