/*******************************************************************************
* Copyright (c) 2011, 2016 Mentor Graphics 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:
* Vladimir Prus (Mentor Graphics) - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.dsf.gdb.internal.ui.osview;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.graphics.Image;
/** Helper class to change table and label provider of a TreeViewer in an atomic fashion.
*
* Suppose we want to change both content and label provider of existing TreeViewer. Right now,
* if we set either, TreeViewer will try a refresh, using one new provider and one old. This
* is obviously nonsensical -- for example if we set set new content provider, then old label provider
* will be asked to provide labels for elements it has no idea what to do with, or for columns beyond
* its range, etc.
*
* This class is wrapping our real content provider, and can be retargeted in one call -- after which
* refresh of TreeViewer sees consistent data.
*
* @since 2.4
* */
public class ContentLabelProviderWrapper<U extends ITableLabelProvider & IStructuredContentProvider>
implements ITableLabelProvider, IStructuredContentProvider
{
public ContentLabelProviderWrapper(U realProvider)
{
this.realProvider = realProvider;
}
public void setData(U realProvider)
{
this.realProvider = realProvider;
}
public U getData()
{
return realProvider;
}
@Override
public Image getColumnImage(Object obj, int index) {
return realProvider.getColumnImage(obj, index);
}
@Override
public void addListener(ILabelProviderListener listener) {
realProvider.addListener(listener);
}
@Override
public boolean isLabelProperty(Object element, String property) {
return realProvider.isLabelProperty(element, property);
}
@Override
public void removeListener(ILabelProviderListener listener) {
realProvider.removeListener(listener);
}
@Override
public String getColumnText(Object obj, int index) {
return realProvider.getColumnText(obj, index);
}
@Override
public void inputChanged(Viewer v, Object oldInput, Object newInput) {
realProvider.inputChanged(v, oldInput, newInput);
}
@Override
public void dispose() {
realProvider.dispose();
}
@Override
public Object[] getElements(Object parent) {
return realProvider.getElements(parent);
}
private U realProvider;
}