/*******************************************************************************
 * Copyright (c) 2008 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.debug.internal.ui.viewers.model.provisional;

import org.eclipse.debug.internal.ui.viewers.model.InternalVirtualTreeModelViewer;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.ViewerLabel;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IMemento;

/**
 * A virtual tree model viewer.  This viewer does not have a user 
 * interface.  Instead, clients configure and access the viewer's data through
 * its public methods.
 * <p>
 * Style flags supported by this viewer are:
 * <ul>
 * <li>SWT.VIRTUAL - Indicates that the viewer should be in lazy mode: 
 * retrieving only elements that are requested.</li>
 * <li>SWT.POP_UP - Indicates that the viewer should ignore requests from the 
 * model to select, expand, or collapse tree elements.</li>
 * </ul>
 * </p>
 * @since 3.5
 * @noextend
 */
public class VirtualTreeModelViewer extends InternalVirtualTreeModelViewer {
    

    public VirtualTreeModelViewer(Display display, int style, IPresentationContext context) {
        super(display, style, context);
    }
    

    /**
     * Returns this viewer's presentation context.
     * 
     * @return presentation context
     */
    public IPresentationContext getPresentationContext() {
        return super.getPresentationContext();
    }   

    /**
     * Registers the given listener for model delta notification.
     * 
     * @param listener model delta listener
     */
    public void addModelChangedListener(IModelChangedListener listener) {
        super.addModelChangedListener(listener); 
    }
    
    /**
     * Unregisters the given listener from model delta notification.
     * 
     * @param listener model delta listener
     */
    public void removeModelChangedListener(IModelChangedListener listener) {
        super.removeModelChangedListener(listener);
    }   
    
    /**
     * Registers the specified listener for view update notifications.
     * 
     * @param listener listener
     */
    public void addViewerUpdateListener(IViewerUpdateListener listener) {
        super.addViewerUpdateListener(listener);
    }

    /**
     * Removes the specified listener from update notifications.
     * 
     * @param listener listener
     */
    public void removeViewerUpdateListener(IViewerUpdateListener listener) {
        super.removeViewerUpdateListener(listener);
    }
        
    /**
     * Returns whether columns can be toggled on/off for this viewer's current
     * input element.
     * 
     * @return whether columns can be toggled on/off
     */
    public boolean canToggleColumns() {
        return super.canToggleColumns();
    }   
    
    /**
     * Returns the current column presentation for this viewer, or <code>null</code>
     * if none.
     * 
     * @return column presentation or <code>null</code>
     */
    public IColumnPresentation getColumnPresentation() {
        return super.getColumnPresentation();
    }   
    
    /**
     * Returns identifiers of the visible columns in this viewer, or <code>null</code>
     * if there are currently no columns.
     *  
     * @return visible columns identifiers or <code>null</code>
     */
    public String[] getVisibleColumns() {
        return super.getVisibleColumns();
    }   
    
    /**
     * Initializes viewer state from the memento
     * 
     * @param memento
     */
    public void initState(IMemento memento) {
        super.initState(memento);
    }
    
    /**
     * Save viewer state into the given memento.
     * 
     * @param memento
     */
    public void saveState(IMemento memento) {
        super.saveState(memento);
    }
    
    /**
     * Returns whether columns are being displayed currently.
     * 
     * @return
     */
    public boolean isShowColumns() {
        return super.isShowColumns();
    }   
    
    /**
     * Toggles columns on/off for the current column presentation, if any.
     * 
     * @param show whether to show columns if the current input supports
     *  columns
     */
    public void setShowColumns(boolean show) {
        super.setShowColumns(show);
    }   
    
    /**
     * Sets the visible columns for this viewer. Id's correspond to 
     * column identifiers from a column presentation. Use <code>null</code>
     * or an empty collection to display default columns for the current
     * column presentation. Only effects the current column presentation.
     * 
     * @param ids column identifiers or <code>null</code>
     */
    public void setVisibleColumns(String[] ids) {
        super.setVisibleColumns(ids);
    }       

    public void updateViewer(IModelDelta delta) {
        super.updateViewer(delta);
    }
    
    public ViewerLabel getElementLabel(TreePath path, String columnId) {
        return super.getElementLabel(path, columnId);
    }
}