org.vclipse.configscan.views.JobAwareTreeViewer.java Source code

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Here is the source code for org.vclipse.configscan.views.JobAwareTreeViewer.java

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/*******************************************************************************
 * Copyright (c) 2010 - 2013 webXcerpt Software GmbH.
 * 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:
 *        webXcerpt Software GmbH - initial creator
 *       www.webxcerpt.com
 ******************************************************************************/
package org.vclipse.configscan.views;

import java.util.List;

import org.eclipse.core.runtime.jobs.IJobChangeEvent;
import org.eclipse.core.runtime.jobs.IJobChangeListener;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Composite;

import com.google.common.collect.Lists;

public class JobAwareTreeViewer extends TreeViewer implements IJobChangeListener {

    public class TreeViewerLockEvent {

        private TreeViewer treeViewer;

        public TreeViewerLockEvent(TreeViewer treeViewer) {
            this.treeViewer = treeViewer;
        }

        public TreeViewer getViewer() {
            return treeViewer;
        }
    }

    public interface ITreeViewerLockListener {

        public void available(TreeViewerLockEvent event);

        public void locked(TreeViewerLockEvent event);
    }

    private List<ITreeViewerLockListener> listener;

    public JobAwareTreeViewer(Composite parent, int style) {
        super(parent, style);
        listener = Lists.newArrayList();
    }

    public void addTreeViewerLockListener(ITreeViewerLockListener lockListener) {
        listener.add(lockListener);
    }

    public void removeTreeViewerLockListener(ITreeViewerLockListener lockListener) {
        listener.remove(lockListener);
    }

    public void aboutToRun(IJobChangeEvent event) {
        for (ITreeViewerLockListener lockListener : listener) {
            lockListener.locked(new TreeViewerLockEvent(this));
        }
    }

    @Override
    public void awake(IJobChangeEvent event) {

    }

    @Override
    public void done(IJobChangeEvent event) {
        for (ITreeViewerLockListener lockListener : listener) {
            lockListener.available(new TreeViewerLockEvent(this));
        }
    }

    @Override
    public void running(IJobChangeEvent event) {
        for (ITreeViewerLockListener lockListener : listener) {
            lockListener.locked(new TreeViewerLockEvent(this));
        }
    }

    @Override
    public void scheduled(IJobChangeEvent event) {

    }

    @Override
    public void sleeping(IJobChangeEvent event) {

    }
}