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/*******************************************************************************
* Copyright (c) 2009, 2014 Wind River Systems 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.debug.test;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerInputRequestor;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerInputUpdate;
import org.eclipse.debug.internal.ui.viewers.model.provisional.PresentationContext;
import org.eclipse.debug.internal.ui.viewers.model.provisional.ViewerInputService;
import org.eclipse.debug.internal.ui.viewers.model.provisional.VirtualTreeModelViewer;
import org.eclipse.debug.ui.contexts.DebugContextEvent;
import org.eclipse.debug.ui.contexts.IDebugContextListener;
import org.eclipse.debug.ui.contexts.IDebugContextProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
/**
*
*/
@SuppressWarnings("restriction")
public class VariablesVirtualTreeModelViewer extends VirtualTreeModelViewer implements IDebugContextListener {
private IDebugContextProvider fDebugContextProvider;
private ViewerInputService fInputService;
private boolean fActive = false;
public VariablesVirtualTreeModelViewer(String contextId, IDebugContextProvider debugContextProvider) {
this(new PresentationContext(contextId), debugContextProvider);
}
public VariablesVirtualTreeModelViewer(IPresentationContext context, IDebugContextProvider debugContextProvider) {
super(Display.getDefault(), SWT.NONE, context);
fInputService = new ViewerInputService(this, new IViewerInputRequestor() {
public void viewerInputComplete(IViewerInputUpdate update) {
if (!update.isCanceled()) {
setInput(update.getInputElement());
}
}
});
fDebugContextProvider = debugContextProvider;
debugContextProvider.addDebugContextListener(this);
}
public void setActive(boolean active) {
if (fActive == active) {
return;
}
fActive = active;
if (fActive) {
setActiveContext(fDebugContextProvider.getActiveContext());
} else {
fInputService.resolveViewerInput(ViewerInputService.NULL_INPUT);
}
}
@Override
public void dispose() {
fDebugContextProvider.removeDebugContextListener(this);
fInputService.dispose();
super.dispose();
}
public void debugContextChanged(DebugContextEvent event) {
if (fActive && (event.getFlags() & DebugContextEvent.ACTIVATED) != 0) {
setActiveContext(event.getContext());
}
}
private void setActiveContext(ISelection selection) {
if (selection instanceof IStructuredSelection) {
fInputService.resolveViewerInput(((IStructuredSelection)selection).getFirstElement());
}
}
}
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