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/*******************************************************************************
* Copyright (c) 2014 Wind River Systems, Inc. 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.te.tcf.filesystem.ui.internal.pages;
import java.util.EventObject;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.tcf.te.core.interfaces.IConnectable;
import org.eclipse.tcf.te.runtime.events.ChangeEvent;
import org.eclipse.tcf.te.runtime.events.EventManager;
import org.eclipse.tcf.te.tcf.filesystem.core.interfaces.runtime.IRuntimeModel;
import org.eclipse.tcf.te.tcf.filesystem.core.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.model.ModelManager;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerNode;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerNodeProperties;
import org.eclipse.tcf.te.ui.events.AbstractEventListener;
import org.eclipse.tcf.te.ui.trees.TreeControl;
/**
* Filesystem page event listener implementation.
*/
public class FSExplorerEventListener extends AbstractEventListener {
// Reference to the parent tree control
/* default */ final TreeControl treeControl;
/**
* Constructor.
*
* @param treeControl The parent tree control. Must not be <code>null</code>.
*/
public FSExplorerEventListener(TreeControl treeControl) {
Assert.isNotNull(treeControl);
this.treeControl = treeControl;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.interfaces.events.IEventListener#eventFired(java.util.EventObject)
*/
@Override
public void eventFired(EventObject event) {
if (event instanceof ChangeEvent) {
final ChangeEvent changeEvent = (ChangeEvent)event;
final Object source = changeEvent.getSource();
if (treeControl.getViewer() != null) {
if (treeControl.getViewer().getControl() == null || treeControl.getViewer().getControl().isDisposed()) {
EventManager.getInstance().removeEventListener(this);
return;
}
// Property changes for the runtime model refreshes the whole tree.
if (source instanceof IRuntimeModel) {
treeControl.getViewer().refresh();
}
// Property changes for individual context nodes refreshes the node only
else if (source instanceof FSTreeNode) {
if ("expanded".equals(changeEvent.getEventId())) { //$NON-NLS-1$
// Expansion state of the node changed.
boolean expanded = ((Boolean)changeEvent.getNewValue()).booleanValue();
// Update the nodes expansion state
((TreeViewer)treeControl.getViewer()).setExpandedState(source, expanded);
} else {
((TreeViewer)treeControl.getViewer()).refresh(source, true);
}
}
else if (source instanceof IPeerNode && source == getPeerNode()) {
if (IPeerNodeProperties.PROPERTY_CONNECT_STATE.equals(changeEvent.getEventId())) {
// Peer node connect state changed to connected
if (changeEvent.getNewValue().equals(Integer.valueOf(IConnectable.STATE_CONNECTED))) {
// Get the new runtime model
final IRuntimeModel model = ModelManager.getRuntimeModel(getPeerNode());
// Update the tree viewer input element
treeControl.getViewer().setInput(model.getRoot());
}
// Trigger a refresh on the whole viewer to show the "Please connect ..." text
treeControl.getViewer().refresh();
}
}
}
}
}
protected IPeerNode getPeerNode() {
Object element = treeControl.getViewer().getInput();
IPeerNode peerNode = element instanceof IPeerNode ? (IPeerNode)element : null;
if (peerNode == null && element instanceof IAdaptable) {
peerNode = (IPeerNode)((IAdaptable)element).getAdapter(IPeerNode.class);
}
return peerNode;
}
}
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