com.nokia.tools.vct.confml.editor.view.viewers.ViewTreeViewer.java Source code

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Here is the source code for com.nokia.tools.vct.confml.editor.view.viewers.ViewTreeViewer.java

Source

/*
 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of "Eclipse Public License v1.0"
 * which accompanies this distribution, and is available
 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
 * 
 * Initial Contributors:
 * Nokia Corporation - Initial contribution
 * 
 * Contributors:
 * 
 * Description: This file is part of com.nokia.tools.vct.confml.editor.view component.
 */

package com.nokia.tools.vct.confml.editor.view.viewers;

import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseTrackAdapter;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.TreeItem;

import com.nokia.tools.vct.confml.editor.view.vemodel.EDescriptionContainer;

/**
 * This ViewTreeViewer has 4 nodes. The ROOT node of tree is VIEW element.
 * Second node is GROUP element. Third node is SUBGROUP and fourth node is SETTING. Tree is 
 * created in the {@link CreateViewPage2} and it provides VIEW, which will be created.  
 * into ViewTreeViewer
 * 
 */

public class ViewTreeViewer extends TreeViewer {

    public ViewTreeViewer(Composite parent, int style) {
        super(parent, style);

        getTree().addMouseTrackListener(new MouseTrackAdapter() {
            @Override
            public void mouseEnter(MouseEvent e) {
                updateTooltip(e.x, e.y);
            }

            @Override
            public void mouseExit(MouseEvent e) {
                getTree().setToolTipText(null);
            }

            @Override
            public void mouseHover(MouseEvent e) {
                updateTooltip(e.x, e.y);
            }
        });
    }

    protected void updateTooltip(int x, int y) {
        TreeItem item = getTree().getItem(new Point(x, y));
        String text = null;
        if (item != null) {
            Object data = item.getData();
            if (data instanceof EDescriptionContainer) {
                text = ((EDescriptionContainer) data).getDescriptionText();
            }
        }
        getTree().setToolTipText(text);
    }

}