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/*******************************************************************************
 * 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. 

* Instances of this class can be created using an AnimatorFactory. * * @since 1.0 */ 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.

* Subclasses should override this method.

* * @param visible true if the control should be shown, * and false 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); } }




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