| /******************************************************************************* |
| * Copyright (c) 2007, 2008 Oracle. 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: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.ui.internal.listeners; |
| |
| import org.eclipse.jpt.utility.model.event.ListChangeEvent; |
| import org.eclipse.jpt.utility.model.listener.ListChangeListener; |
| import org.eclipse.swt.widgets.Display; |
| |
| /** |
| * Wrap another list change listener and forward events to it on the SWT |
| * UI thread. |
| */ |
| public class SWTListChangeListenerWrapper |
| implements ListChangeListener |
| { |
| private final ListChangeListener listener; |
| |
| public SWTListChangeListenerWrapper(ListChangeListener listener) { |
| super(); |
| if (listener == null) { |
| throw new NullPointerException(); |
| } |
| this.listener = listener; |
| } |
| |
| public void itemsAdded(ListChangeEvent event) { |
| if (this.isExecutingUIThread()) { |
| this.itemsAdded_(event); |
| } else { |
| this.executeOnUIThread(this.buildItemsAddedRunnable(event)); |
| } |
| } |
| |
| public void itemsRemoved(ListChangeEvent event) { |
| if (this.isExecutingUIThread()) { |
| this.itemsRemoved_(event); |
| } else { |
| this.executeOnUIThread(this.buildItemsRemovedRunnable(event)); |
| } |
| } |
| |
| public void itemsMoved(ListChangeEvent event) { |
| if (this.isExecutingUIThread()) { |
| this.itemsMoved_(event); |
| } else { |
| this.executeOnUIThread(this.buildItemsMovedRunnable(event)); |
| } |
| } |
| |
| public void itemsReplaced(ListChangeEvent event) { |
| if (this.isExecutingUIThread()) { |
| this.itemsReplaced_(event); |
| } else { |
| this.executeOnUIThread(this.buildItemsReplacedRunnable(event)); |
| } |
| } |
| |
| public void listCleared(ListChangeEvent event) { |
| if (this.isExecutingUIThread()) { |
| this.listCleared_(event); |
| } else { |
| this.executeOnUIThread(this.buildCollectionClearedRunnable(event)); |
| } |
| } |
| |
| public void listChanged(ListChangeEvent event) { |
| if (this.isExecutingUIThread()) { |
| this.listChanged_(event); |
| } else { |
| this.executeOnUIThread(this.buildCollectionChangedRunnable(event)); |
| } |
| } |
| |
| private Runnable buildItemsAddedRunnable(final ListChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| SWTListChangeListenerWrapper.this.itemsAdded_(event); |
| } |
| @Override |
| public String toString() { |
| return "items added"; |
| } |
| }; |
| } |
| |
| private Runnable buildItemsRemovedRunnable(final ListChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| SWTListChangeListenerWrapper.this.itemsRemoved_(event); |
| } |
| @Override |
| public String toString() { |
| return "items removed"; |
| } |
| }; |
| } |
| |
| private Runnable buildItemsMovedRunnable(final ListChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| SWTListChangeListenerWrapper.this.itemsMoved_(event); |
| } |
| @Override |
| public String toString() { |
| return "items moved"; |
| } |
| }; |
| } |
| |
| private Runnable buildItemsReplacedRunnable(final ListChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| SWTListChangeListenerWrapper.this.itemsReplaced_(event); |
| } |
| @Override |
| public String toString() { |
| return "items replaced"; |
| } |
| }; |
| } |
| |
| private Runnable buildCollectionClearedRunnable(final ListChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| SWTListChangeListenerWrapper.this.listCleared_(event); |
| } |
| @Override |
| public String toString() { |
| return "list cleared"; |
| } |
| }; |
| } |
| |
| private Runnable buildCollectionChangedRunnable(final ListChangeEvent event) { |
| return new Runnable() { |
| public void run() { |
| SWTListChangeListenerWrapper.this.listChanged_(event); |
| } |
| @Override |
| public String toString() { |
| return "list changed"; |
| } |
| }; |
| } |
| |
| private boolean isExecutingUIThread() { |
| return Display.getCurrent() != null; |
| } |
| |
| /** |
| * Display#asyncExec(Runnable) seems to work OK; |
| * but using #syncExec(Runnable) can somtimes make things |
| * more predictable when debugging, at the risk of deadlocks. |
| */ |
| private void executeOnUIThread(Runnable r) { |
| Display.getDefault().asyncExec(r); |
| // Display.getDefault().syncExec(r); |
| } |
| |
| void itemsAdded_(ListChangeEvent event) { |
| this.listener.itemsAdded(event); |
| } |
| |
| void itemsRemoved_(ListChangeEvent event) { |
| this.listener.itemsRemoved(event); |
| } |
| |
| void itemsMoved_(ListChangeEvent event) { |
| this.listener.itemsMoved(event); |
| } |
| |
| void itemsReplaced_(ListChangeEvent event) { |
| this.listener.itemsReplaced(event); |
| } |
| |
| void listCleared_(ListChangeEvent event) { |
| this.listener.listCleared(event); |
| } |
| |
| void listChanged_(ListChangeEvent event) { |
| this.listener.listChanged(event); |
| } |
| |
| @Override |
| public String toString() { |
| return "SWT(" + this.listener.toString() + ")"; |
| } |
| |
| } |