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/*******************************************************************************
* Copyright (c) 2004, 2013 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
* Wind River Systems - Extracted from o.e.mylyn.commons and adapted for Target Explorer
*******************************************************************************/
package org.eclipse.tcf.te.ui.notifications.internal.popup;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.tcf.te.ui.notifications.nls.Messages;
/**
* @author Mik Kersten
* @author Steffen Pingel
*/
public class AnimationUtil {
public static final long FADE_RESCHEDULE_DELAY = 80;
public static final int FADE_IN_INCREMENT = 15;
public static final int FADE_OUT_INCREMENT = -20;
public static FadeJob fastFadeIn(Shell shell, IFadeListener listener) {
return new FadeJob(shell, 2 * FADE_IN_INCREMENT, FADE_RESCHEDULE_DELAY, listener);
}
public static FadeJob fadeIn(Shell shell, IFadeListener listener) {
return new FadeJob(shell, FADE_IN_INCREMENT, FADE_RESCHEDULE_DELAY, listener);
}
public static FadeJob fadeOut(Shell shell, IFadeListener listener) {
return new FadeJob(shell, FADE_OUT_INCREMENT, FADE_RESCHEDULE_DELAY, listener);
}
public static class FadeJob extends Job {
/* default */ final Shell shell;
private final int increment;
/* default */ volatile boolean stopped;
/* default */ volatile int currentAlpha;
private final long delay;
/* default */ final IFadeListener fadeListener;
public FadeJob(Shell shell, int increment, long delay, IFadeListener fadeListener) {
super(Messages.SwtUtil_Fading);
if (increment < -255 || increment == 0 || increment > 255) {
throw new IllegalArgumentException("-255 <= increment <= 255 && increment != 0"); //$NON-NLS-1$
}
if (delay < 1) {
throw new IllegalArgumentException("delay must be > 0"); //$NON-NLS-1$
}
this.currentAlpha = shell.getAlpha();
this.shell = shell;
this.increment = increment;
this.delay = delay;
this.fadeListener = fadeListener;
setSystem(true);
schedule(delay);
}
@Override
protected void canceling() {
stopped = true;
}
private void reschedule() {
if (stopped) {
return;
}
schedule(delay);
}
public void cancelAndWait(final boolean setAlpha) {
if (stopped) {
return;
}
cancel();
Display.getDefault().syncExec(new Runnable() {
@Override
public void run() {
if (setAlpha) {
shell.setAlpha(getLastAlpha());
}
}
});
}
@Override
protected IStatus run(IProgressMonitor monitor) {
if (stopped) {
return Status.OK_STATUS;
}
currentAlpha += increment;
if (currentAlpha <= 0) {
currentAlpha = 0;
} else if (currentAlpha >= 255) {
currentAlpha = 255;
}
Display.getDefault().syncExec(new Runnable() {
@Override
public void run() {
if (stopped) {
return;
}
if (shell.isDisposed()) {
stopped = true;
return;
}
shell.setAlpha(currentAlpha);
if (fadeListener != null) {
fadeListener.faded(shell, currentAlpha);
}
}
});
if (currentAlpha == 0 || currentAlpha == 255) {
stopped = true;
}
reschedule();
return Status.OK_STATUS;
}
/* default */ int getLastAlpha() {
return (increment < 0) ? 0 : 255;
}
}
public static interface IFadeListener {
public void faded(Shell shell, int alpha);
}
}
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