diff options
Diffstat (limited to 'plugins/infra/ui/org.eclipse.papyrus.infra.widgets.toolbox/src/org/eclipse/papyrus/infra/widgets/toolbox/SwtUtil.java')
-rw-r--r-- | plugins/infra/ui/org.eclipse.papyrus.infra.widgets.toolbox/src/org/eclipse/papyrus/infra/widgets/toolbox/SwtUtil.java | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/plugins/infra/ui/org.eclipse.papyrus.infra.widgets.toolbox/src/org/eclipse/papyrus/infra/widgets/toolbox/SwtUtil.java b/plugins/infra/ui/org.eclipse.papyrus.infra.widgets.toolbox/src/org/eclipse/papyrus/infra/widgets/toolbox/SwtUtil.java new file mode 100644 index 00000000000..f7ea106c770 --- /dev/null +++ b/plugins/infra/ui/org.eclipse.papyrus.infra.widgets.toolbox/src/org/eclipse/papyrus/infra/widgets/toolbox/SwtUtil.java @@ -0,0 +1,167 @@ +/***************************************************************************** + * Copyright (c) Eclipse. + * + * 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: + * Mik Kersten + * Steffen Pingel + *****************************************************************************/ +package org.eclipse.papyrus.infra.widgets.toolbox; + +import java.util.Set; + +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.swt.widgets.TreeItem; + +/** + * @author Mik Kersten + * @author Steffen Pingel + */ +public class SwtUtil { + + 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 void collectItemData(TreeItem[] items, Set<Object> allVisible) { + for (TreeItem item : items) { + allVisible.add(item.getData()); + collectItemData(item.getItems(), allVisible); + } + } + + public static FadeJob fastFadeIn(Shell shell, SwtUtil.IFadeListener listener) { + return new FadeJob(shell, 2 * FADE_IN_INCREMENT, FADE_RESCHEDULE_DELAY, listener); + } + + public static FadeJob fadeIn(Shell shell, SwtUtil.IFadeListener listener) { + return new FadeJob(shell, FADE_IN_INCREMENT, FADE_RESCHEDULE_DELAY, listener); + } + + public static FadeJob fadeOut(Shell shell, SwtUtil.IFadeListener listener) { + return new FadeJob(shell, FADE_OUT_INCREMENT, FADE_RESCHEDULE_DELAY, listener); + } + + public static class FadeJob extends Job { + + private final Shell shell; + + private final int increment; + + private volatile boolean stopped; + + private volatile int currentAlpha; + + private final long delay; + + private final IFadeListener fadeListener; + + public FadeJob(Shell shell, int increment, long delay, IFadeListener fadeListener) { + super("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() { + + 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() { + + 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; + } + + private int getLastAlpha() { + return (increment < 0) ? 0 : 255; + } + + } + + public static interface IFadeListener { + + public void faded(Shell shell, int alpha); + } + +} |