/*******************************************************************************
* Copyright (c) 2005, 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
* Matthew Hall - bug 223123
*******************************************************************************/
package org.eclipse.jface.internal.databinding.provisional.viewers;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.core.databinding.util.Policy;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IViewerLabelProvider;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.jface.viewers.ViewerLabel;
import org.eclipse.swt.graphics.Image;
/**
* NON-API - Generic viewer label provider.
* @since 1.1
*
*/
public class ViewerLabelProvider implements IViewerLabelProvider,
ILabelProvider {
private List listeners = new ArrayList();
/**
* Subclasses should override this method. They should not call the base
* class implementation.
*/
public void updateLabel(ViewerLabel label, Object element) {
label.setText(element.toString());
}
protected final void fireChangeEvent(Collection changes) {
final LabelProviderChangedEvent event = new LabelProviderChangedEvent(
this, changes.toArray());
ILabelProviderListener[] listenerArray = (ILabelProviderListener[]) listeners
.toArray(new ILabelProviderListener[listeners.size()]);
for (int i = 0; i < listenerArray.length; i++) {
ILabelProviderListener listener = listenerArray[i];
try {
listener.labelProviderChanged(event);
} catch (Exception e) {
Policy.getLog().log(
new Status(IStatus.ERROR, Policy.JFACE_DATABINDING, e
.getLocalizedMessage(), e));
}
}
}
public final Image getImage(Object element) {
ViewerLabel label = new ViewerLabel("", null); //$NON-NLS-1$
updateLabel(label, element);
return label.getImage();
}
public final String getText(Object element) {
ViewerLabel label = new ViewerLabel("", null); //$NON-NLS-1$
updateLabel(label, element);
return label.getText();
}
public void addListener(ILabelProviderListener listener) {
listeners.add(listener);
}
public void dispose() {
listeners.clear();
}
public final boolean isLabelProperty(Object element, String property) {
return true;
}
public void removeListener(ILabelProviderListener listener) {
listeners.remove(listener);
}
}