/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 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.components.list;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.component.FillPrepareResult;
import net.sf.jasperreports.engine.fill.JRFillObjectFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Vertical fill list component implementation.
*
* @author Lucian Chirita (lucianc@users.sourceforge.net)
* @version $Id: VerticalFillList.java 3237 2009-12-28 14:22:06Z lucianc $
*/
public class VerticalFillList extends BaseFillList
{
private static final Log log = LogFactory.getLog(VerticalFillList.class);
private final FillListContents listContents;
public VerticalFillList(ListComponent component, JRFillObjectFactory factory) throws JRException
{
super(component, factory);
JRFillObjectFactory datasetFactory = new JRFillObjectFactory(factory,
createDatasetExpressionEvaluator());
this.listContents = new FillListContents(component.getContents(), datasetFactory);
}
public FillPrepareResult prepare(int availableHeight)
{
createPrintFrame();
try
{
boolean hadData = false;
boolean overflow = false;
if (filling)
{
// continuing after an overflow
if (log.isDebugEnabled())
{
log.debug("Continuing list after overflow");
}
hadData = true;
overflow = fillContents(availableHeight);
}
else
{
if (log.isDebugEnabled())
{
log.debug("Starting list rendering");
}
if (fillStarted)
{
// if already started and finished, rewind the data source
if (log.isDebugEnabled())
{
log.debug("List reprinted, rewinding data source");
}
datasetRun.rewind();
}
datasetRun.start();
fillStarted = true;
}
while(!overflow && datasetRun.next())
{
hadData = true;
listContents.evaluateContents();
overflow = fillContents(availableHeight);
}
if (overflow)
{
if (log.isDebugEnabled())
{
log.debug("List has overflowed");
}
// set the filling flag so that we know that we are continuing
filling = true;
return FillPrepareResult.printStretch(availableHeight, overflow);
}
else
{
// list has completed;
if (log.isDebugEnabled())
{
log.debug("List has completed rendering");
}
filling = false;
datasetRun.end();
if (!hadData)
{
//if no data, set as no print
return FillPrepareResult.NO_PRINT_NO_OVERFLOW;
}
return FillPrepareResult.printStretch(printFrame.getHeight(), false);
}
}
catch (JRException e)
{
throw new JRRuntimeException(e);
}
}
protected boolean fillContents(int availableHeight) throws JRException
{
boolean overflow;
int contentsAvailableHeight = availableHeight - printFrame.getHeight();
if (contentsAvailableHeight < listContents.getHeight())
{
overflow = true;
}
else
{
listContents.prepare(contentsAvailableHeight);
listContents.finalizeElementPositions();
listContents.fillElements(
new AppendingPrintElementContainer(printFrame));
overflow = listContents.willOverflow();
}
return overflow;
}
}