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Advanced grid components for Apache Wicket

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package com.inmethod.grid.toolbar.paging;

import org.apache.wicket.Component;
import org.apache.wicket.extensions.markup.html.repeater.data.table.DataTable;

import com.inmethod.grid.IDataSource;
import com.inmethod.grid.datagrid.DataGrid;
import com.inmethod.grid.toolbar.AbstractToolbar;

/**
 * Toolbar that displays a paging navigator and a label with message about which rows are being
 * displayed and their total number in the data table.
 * 
 * This toolbar can only be added to {@link DataTable}
 * 
 * @param 
 *            datasource model object type = grid type
 * @param 
 *            row/item model object type
 * 
 * @author Matej Knopp
 */
public class PagingToolbar, T, S> extends AbstractToolbar
{

	private static final long serialVersionUID = 1L;

	/**
	 * Returns the {@link DataGrid} to which this toolbar belongs.
	 * 
	 * @return data grid
	 */
	public DataGrid getDataGrid()
	{
		return (DataGrid)super.getGrid();
	}

	/**
	 * Constructor
	 * 
	 * @param grid
	 *            data grid
	 */
	public PagingToolbar(DataGrid grid)
	{
		super(grid, null);

		add(newPagingNavigator("navigator"));
		add(newNavigationLabel("navigationLabel"));
	}

	protected Component newNavigationLabel(String id)
	{
		return new NavigatorLabel(id, getDataGrid());
	}

	protected Component newPagingNavigator(String id)
	{
		return new PagingNavigator(id, getDataGrid());
	}

	/**
	 * Important to prevent early initialization of QueryResult at AbstractPageableView. The
	 * isVisible method can be called during an early step in the form process and the QuertyResult
	 * initialization can fail if it depend upon form components
	 */
	@Override
	protected void onConfigure()
	{
		super.onConfigure();
		setVisible(getDataGrid().getTotalRowCount() != 0);
	}
}