/*******************************************************************************
* Copyright (c) 2009, 2010 Matthew Hall 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:
* Matthew Hall - initial API and implementation (bug 259380)
* Matthew Hall - bug 283204
******************************************************************************/
package org.eclipse.jface.internal.databinding.viewers;
import java.util.Iterator;
import java.util.Set;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.set.IObservableSet;
import org.eclipse.core.databinding.observable.set.SetDiff;
import org.eclipse.core.databinding.property.set.SetProperty;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.viewers.ICheckable;
import org.eclipse.jface.viewers.IElementComparer;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
/**
* @since 3.3
*
*/
public class CheckableCheckedElementsProperty extends SetProperty {
private final Object elementType;
/**
* @param elementType
*/
public CheckableCheckedElementsProperty(Object elementType) {
this.elementType = elementType;
}
public Object getElementType() {
return elementType;
}
protected Set doGetSet(Object source) {
throw new UnsupportedOperationException(
"Cannot query the checked elements on an ICheckable"); //$NON-NLS-1$
}
protected void doSetSet(Object source, Set set) {
throw new UnsupportedOperationException(
"Cannot batch replace the checked elements on an ICheckable. " + //$NON-NLS-1$
"Use updateSet(SetDiff) instead"); //$NON-NLS-1$
}
protected void doUpdateSet(Object source, SetDiff diff) {
ICheckable checkable = (ICheckable) source;
for (Iterator it = diff.getAdditions().iterator(); it.hasNext();)
checkable.setChecked(it.next(), true);
for (Iterator it = diff.getRemovals().iterator(); it.hasNext();)
checkable.setChecked(it.next(), false);
}
public IObservableSet observe(Object source) {
if (source instanceof Viewer) {
return observe(SWTObservables.getRealm(((Viewer) source)
.getControl().getDisplay()), source);
}
return super.observe(source);
}
public IObservableSet observe(Realm realm, Object source) {
IElementComparer comparer = null;
if (source instanceof StructuredViewer)
comparer = ((StructuredViewer) source).getComparer();
Set wrappedSet = ViewerElementSet.withComparer(comparer);
IObservableSet observable = new CheckableCheckedElementsObservableSet(
realm, wrappedSet, elementType, comparer, (ICheckable) source);
if (source instanceof Viewer)
observable = new ViewerObservableSetDecorator(observable,
(Viewer) source);
return observable;
}
}