/**
 * Action.
 *
 * @param arg0
 * @return
 */
private boolean actionCellSelected(CellSelectionEvent arg0) {

    // Reset
    this.selectedColumn = null;
    this.selectedRow = null;
    
    // Set
    int column = arg0.getColumnPosition();
    int row = arg0.getRowPosition();
    if (column>=0 && row>=0 && row<dataProviderBody.getRowCount() && column<dataProviderBody.getColumnCount()){
        this.selectedColumn = column;
        this.selectedRow = row;
        fireSelectionEvent();
        return true;
    } else {
        return false;
    }
}
 

/**
 * Adds a selection listener.
 *
 * @param layer
 */
private void addSelectionListener(final SelectionLayer layer) {
    layer.addLayerListener(new ILayerListener(){
        @Override
        public void handleLayerEvent(ILayerEvent arg0) {
            if (arg0 instanceof CellSelectionEvent) {
                if (!actionCellSelected((CellSelectionEvent)arg0)){
                    layer.clear(true);
                }
            } else if (arg0 instanceof ColumnSelectionEvent) {
                if (!actionColumnSelected((ColumnSelectionEvent)arg0)){
                    layer.clear(true);
                }
            } else if (arg0 instanceof RowSelectionEvent) {
                if (!actionRowSelected((RowSelectionEvent)arg0)) {
                    layer.clear(true);
                }
            }
        }
    });

}
 

/**
 * Cell selection event.
 *
 * @param arg1
 */
protected void actionCellSelected(CellSelectionEvent arg1){
    if (model != null) {
        int column = arg1.getColumnPosition() - 1;
        if (column>=0) actionColumnSelected(column);
    }
}
 

@Override
protected void actionCellSelected(CellSelectionEvent arg1) {
	super.actionCellSelected(arg1);
}
 

/**
 * 
 * Creates a new data view.
 *
 * @param parent
 * @param controller
 * @param title
 * @param helpid
 */
public ViewData(final Composite parent,
                final Controller controller,
                final String helpid,
                final String title) {

    // Register
    controller.addListener(ModelPart.ATTRIBUTE_TYPE, this);
    controller.addListener(ModelPart.ATTRIBUTE_TYPE_BULK_UPDATE, this);
    controller.addListener(ModelPart.SELECTED_ATTRIBUTE, this);
    controller.addListener(ModelPart.MODEL, this);
    controller.addListener(ModelPart.OUTPUT, this);
    controller.addListener(ModelPart.SELECTED_VIEW_CONFIG, this);
    controller.addListener(ModelPart.INPUT, this);
    
    // Store
    this.controller = controller;
    
    // Load images
    IMAGE_ASCENDING         = controller.getResources().getManagedImage("sort_ascending.png"); //$NON-NLS-1$
    IMAGE_DESCENDING        = controller.getResources().getManagedImage("sort_descending.png");//$NON-NLS-1$

    // Create title bar
    ComponentTitledFolderButtonBar bar = new ComponentTitledFolderButtonBar(helpid, helpids); //$NON-NLS-1$
    bar.add(Resources.getMessage("DataView.1"), //$NON-NLS-1$ 
            IMAGE_ASCENDING,
            new Runnable() {
                @Override
                public void run() {
                    model.getViewConfig().setSortOrder(true);
                    actionSort();
                }
            });
    bar.add(Resources.getMessage("DataView.4"), //$NON-NLS-1$ 
            IMAGE_DESCENDING,
            new Runnable() {
                @Override
                public void run() {
                    model.getViewConfig().setSortOrder(false);
                    actionSort();
                }
            });
    bar.add(Resources.getMessage("DataView.2"), //$NON-NLS-1$ 
            controller.getResources().getManagedImage("sort_groups.png"), //$NON-NLS-1$
            new Runnable() {
                @Override
                public void run() {
                    controller.actionDataShowGroups();
                }
            });
    bar.add(Resources.getMessage("DataView.3"), //$NON-NLS-1$ 
            controller.getResources().getManagedImage("sort_subset.png"), //$NON-NLS-1$
            true,
            new Runnable() {
                @Override
                public void run() {
                    controller.actionDataToggleSubset();
                }
            });
    
    // Build border
    folder = new ComponentTitledFolder(parent, controller, bar, null);
    folder.setLayoutData(SWTUtil.createFillGridData());
    Composite c = folder.createItem(title, null);
    folder.setSelection(0);
    GridLayout l = new GridLayout();
    l.numColumns = 1;
    c.setLayout(l);
    
    // Build table
    table = new ComponentDataTable(controller, c);
    table.addSelectionLayerListener(new ILayerListener(){
        @Override
        public void handleLayerEvent(ILayerEvent arg0) {
            if (arg0 instanceof CellSelectionEvent) {
                actionCellSelected((CellSelectionEvent)arg0);
            } else if (arg0 instanceof ColumnSelectionEvent) {
                actionColumnSelected((ColumnSelectionEvent)arg0);
            }
        }
    });
    
    // Build buttons
    this.groupsButton = folder.getButtonItem(Resources.getMessage("DataView.2")); //$NON-NLS-1$
    this.groupsButton.setEnabled(false);
    this.subsetButton = folder.getButtonItem(Resources.getMessage("DataView.3")); //$NON-NLS-1$
    this.subsetButton.setEnabled(false);
    this.ascendingButton = folder.getButtonItem(Resources.getMessage("DataView.1")); //$NON-NLS-1$
    this.ascendingButton.setEnabled(false);
    this.descendingButton = folder.getButtonItem(Resources.getMessage("DataView.4")); //$NON-NLS-1$
    this.descendingButton.setEnabled(false);
}