diff options
Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/listeners/SWTPropertyChangeListenerWrapper.java')
-rw-r--r-- | common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/listeners/SWTPropertyChangeListenerWrapper.java | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/listeners/SWTPropertyChangeListenerWrapper.java b/common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/listeners/SWTPropertyChangeListenerWrapper.java deleted file mode 100644 index f95fbe6005..0000000000 --- a/common/plugins/org.eclipse.jpt.common.ui/src/org/eclipse/jpt/common/ui/internal/listeners/SWTPropertyChangeListenerWrapper.java +++ /dev/null @@ -1,82 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2007, 2010 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.common.ui.internal.listeners; - -import org.eclipse.jpt.common.utility.model.event.PropertyChangeEvent; -import org.eclipse.jpt.common.utility.model.listener.PropertyChangeListener; -import org.eclipse.swt.widgets.Display; - -/** - * Wrap another property change listener and forward events to it on the SWT - * UI thread, asynchronously if necessary. If the event arrived on the UI - * thread that is probably because it was initiated by a UI widget; as a - * result, we want to loop back synchronously so the events can be - * short-circuited. (Typically, the adapter(s) between a <em>property</em> and - * its corresponding UI widget are read-write; as opposed to the adapter(s) - * between a <em>collection</em> (or <em>list</em>) and its UI widget, which - * is read-only.) - */ -public class SWTPropertyChangeListenerWrapper - implements PropertyChangeListener -{ - private final PropertyChangeListener listener; - - public SWTPropertyChangeListenerWrapper(PropertyChangeListener listener) { - super(); - if (listener == null) { - throw new NullPointerException(); - } - this.listener = listener; - } - - public void propertyChanged(PropertyChangeEvent event) { - if (this.isExecutingOnUIThread()) { - this.propertyChanged_(event); - } else { - this.executeOnUIThread(this.buildPropertyChangedRunnable(event)); - } - } - - private Runnable buildPropertyChangedRunnable(final PropertyChangeEvent event) { - return new Runnable() { - public void run() { - SWTPropertyChangeListenerWrapper.this.propertyChanged_(event); - } - @Override - public String toString() { - return "property changed runnable"; //$NON-NLS-1$ - } - }; - } - - private boolean isExecutingOnUIThread() { - return Display.getCurrent() != null; - } - - /** - * {@link Display#asyncExec(Runnable)} seems to work OK; - * but using {@link Display#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 propertyChanged_(PropertyChangeEvent event) { - this.listener.propertyChanged(event); - } - - @Override - public String toString() { - return "SWT(" + this.listener.toString() + ')'; //$NON-NLS-1$ - } - -} |