/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2013 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.crosstabs;

import java.awt.Color;

import net.sf.jasperreports.engine.JRBoxContainer;
import net.sf.jasperreports.engine.JRElementGroup;
import net.sf.jasperreports.engine.JRPropertiesHolder;
import net.sf.jasperreports.engine.JRPropertiesUtil;
import net.sf.jasperreports.engine.JRStyleContainer;
import net.sf.jasperreports.engine.type.ModeEnum;

/**
 * Crosstab cell contents interface.
 * <p>
 * This interface is used for both crosstab row/column headers and data cells.
 * <p>
 * There are some restrictions/rules regarding crosstab cells:
 * <ul>
 * 	<li>subreports, crosstabs and charts are not allowed</li>
 * 	<li>delayed evaluation for text fields and images is not allowed</li>
 * 	<li>cells cannot split on multiple pages</li>
 * </ul>
 * 
 * @author Lucian Chirita (lucianc@users.sourceforge.net)
 * @version $Id: JRCellContents.java 6874 2014-02-07 11:24:22Z lucianc $
 */
public interface JRCellContents extends JRElementGroup, JRStyleContainer, JRBoxContainer, JRPropertiesHolder
{

	/**
	 * Width or height value indicating that the value has not been computed.
	 */
	public static final int NOT_CALCULATED = Integer.MIN_VALUE;
	
	
	/**
	 * A prefix used for properties that are set on frames generated by crosstab cells.
	 * 
	 * @see net.sf.jasperreports.engine.JRPrintFrame
	 */
	public static final String PROPERTIES_PREFIX = JRPropertiesUtil.PROPERTY_PREFIX + "crosstab.cell.";
	
	/**
	 * A property that provides the type of the cell that generated a print frame.
	 * 
	 * <p>
	 * The property value is one of
	 * <ul>
	 * 	<li>{@link #TYPE_CROSSTAB_HEADER}</li>
	 * 	<li>{@link #TYPE_COLUMN_HEADER}</li>
	 * 	<li>{@link #TYPE_ROW_HEADER}</li>
	 * 	<li>{@link #TYPE_DATA}</li>
	 * 	<li>{@link #TYPE_NO_DATA_CELL}</li>
	 * </ul>
	 */
	public static final String PROPERTY_TYPE = PROPERTIES_PREFIX + "type";
	
	/**
	 * A property that provides the crosstab row span of a print frame.
	 */
	public static final String PROPERTY_ROW_SPAN = PROPERTIES_PREFIX + "row.span";
	
	/**
	 * A property that provides the crosstab column span of a print frame.
	 */
	public static final String PROPERTY_COLUMN_SPAN = PROPERTIES_PREFIX + "column.span";
	
	/**
	 * Type used by the {@link JRCrosstab#getTitleCell() crosstab title cell}.
	 * 
	 * @see #PROPERTY_TYPE
	 */
	public static final String TYPE_CROSSTAB_TITLE = "CrosstabTitle";
	
	/**
	 * Type used by the {@link JRCrosstab#getHeaderCell() crosstab header cell}.
	 * 
	 * @see #PROPERTY_TYPE
	 */
	public static final String TYPE_CROSSTAB_HEADER = "CrosstabHeader";
	
	/**
	 * Type used by the row header cells.
	 * 
	 * @see JRCrosstabRowGroup#getHeader()
	 * @see JRCrosstabRowGroup#getTotalHeader()
	 * @see #PROPERTY_TYPE
	 */
	public static final String TYPE_ROW_HEADER = "RowHeader";
	
	/**
	 * Type used by the column header cells.
	 * 
	 * @see JRCrosstabColumnGroup#getHeader()
	 * @see JRCrosstabColumnGroup#getTotalHeader()
	 * @see #PROPERTY_TYPE
	 */
	public static final String TYPE_COLUMN_HEADER = "ColumnHeader";
	
	/**
	 * Type used by the {@link JRCrosstab#getCells() crosstab data cells}.
	 * 
	 * @see #PROPERTY_TYPE
	 */
	public static final String TYPE_DATA = "Data";
	
	/**
	 * Type used by the {@link JRCrosstab#getWhenNoDataCell() crosstab "no data" cell}.
	 * 
	 * @see #PROPERTY_TYPE
	 */
	public static final String TYPE_NO_DATA_CELL = "NoDataCell";
	
	
	/**
	 * Returns the cell background color.
	 * <p>
	 * The cell is filled with the background color only if the cell has opaque mode.
	 * 
	 * @return the cell backcolor
	 */
	public Color getBackcolor();
	
	
	/**
	 * Returns the computed cell width.
	 * 
	 * @return the computed cell width
	 * @see #NOT_CALCULATED
	 */
	public int getWidth();
	
		
	/**
	 * Returns the computed cell height.
	 * 
	 * @return the computed cell height
	 * @see #NOT_CALCULATED
	 */
	public int getHeight();
	
	
	/**
	 * Returns the cell transparency mode.
	 * 
	 * @return {@link ModeEnum#OPAQUE}
	 * or {@link ModeEnum#TRANSPARENT}
	 */
	public ModeEnum getModeValue();
}