| /******************************************************************************* |
| * Copyright (c) 2007, 2008 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.e4.ui.internal.workbench.swt; |
| |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.graphics.Rectangle; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| |
| /** |
| * Creates an animation effect where the Shell's image is captured and |
| * over-lain (in its own shell) on top of the real one. This image |
| * masks the changes to the 'real' shell and then the covering image |
| * fades to transparent, revealing the new state. |
| * |
| * This provides a nice cross-fade effect for operations like a |
| * perspective change (where the overall effect on the shell is large. |
| * |
| * @since 3.3 |
| * |
| */ |
| public class FaderAnimationFeedback extends AnimationFeedbackBase { |
| private Image backingStore; |
| |
| public FaderAnimationFeedback(Shell parentShell) { |
| super(parentShell); |
| } |
| |
| public void dispose() { |
| super.dispose(); |
| |
| if (!backingStore.isDisposed()) |
| backingStore.dispose(); |
| } |
| |
| public void initialize(AnimationEngine engine) { |
| Rectangle psRect = getBaseShell().getBounds(); |
| getAnimationShell().setBounds(psRect); |
| |
| // Capture the background image |
| Display display = getBaseShell().getDisplay(); |
| backingStore = new Image(display, psRect); |
| GC gc = new GC(display); |
| // gc.copyArea(backingStore, psRect.x, psRect.y); |
| gc.copyArea(backingStore, psRect.x, psRect.y); |
| gc.dispose(); |
| |
| getAnimationShell().setAlpha(254); |
| getAnimationShell().setBackgroundImage(backingStore); |
| getAnimationShell().setVisible(true); |
| } |
| |
| public void renderStep(AnimationEngine engine) { |
| getAnimationShell().setAlpha((int) (255 - (engine.amount()*255))); |
| } |
| |
| } |