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/*
* Oreka -- A media capture and retrieval platform
*
* Copyright (C) 2005, orecx LLC
*
* http://www.orecx.com
*
* This program is free software, distributed under the terms of
* the GNU General Public License.
* Please refer to http://www.gnu.org/copyleft/gpl.html
*
*/
/**
*
*/
package net.sf.oreka.tapestry;
import java.util.*;
import org.apache.log4j.*;
import org.apache.tapestry.*;
public abstract class TablePaging extends BaseComponent {
static Logger logger = Logger.getLogger(TablePaging.class);
public abstract TableState getTableState();
public abstract void setTableState(TableState state);
Integer sliderPosition;
public void firstPageAction(IRequestCycle cycle) {
getTableState().setNumResults(0);
setTableState(getTableState()); // persist !
}
public void previousPageAction(IRequestCycle cycle) {
TableState ps = getTableState();
if ( (ps.getCurrentOffset() - ps.getResultsPerPage()) >= 0 ) {
ps.setCurrentOffset(ps.getCurrentOffset() - ps.getResultsPerPage());
}
setTableState(getTableState()); // persist !
}
public void nextPageAction(IRequestCycle cycle) {
//logger.log(Level.INFO, "before:" + getPagingState().getCurrentPage());
//getPagingState().setCurrentPage(getPagingState().getCurrentPage()+1);
//logger.log(Level.INFO, "after:" + getPagingState().getCurrentPage());
TableState ps = getTableState();
if ( (ps.getCurrentOffset() + ps.getResultsPerPage()) < ps.getNumResults() ) {
ps.setCurrentOffset(ps.getCurrentOffset() + ps.getResultsPerPage());
}
setTableState(getTableState()); // persist !
}
public void lastPageAction(IRequestCycle cycle) {
TableState ps = getTableState();
double numPages = (double)ps.getNumResults() / ps.getResultsPerPage();
numPages = java.lang.Math.ceil(numPages);
//int numWholePages = ps.getNumResults() / ps.getResultsPerPage();
//int remainder = ps.getNumResults() % ps.getResultsPerPage();
//int lastPageOffset = 0;
//if (remainder > 0) {
// lastPageOffset = numWholePages * ps.getResultsPerPage();
//}
//else if (numWholePages > 0){
// lastPageOffset = (numWholePages - 1) * ps.getResultsPerPage();
//}
int lastPageOffset = 0;
if (numPages >= 1) {
lastPageOffset = (int)(numPages-1) * ps.getResultsPerPage();
}
ps.setCurrentOffset(lastPageOffset);
setTableState(getTableState()); // persist !
}
public void sliderClickAction(IRequestCycle cycle) {
Object[] parameters = cycle.getServiceParameters();
Integer sliderPosition = (Integer)parameters[0];
TableState ts = getTableState();
ts.setSliderPosition(sliderPosition);
double newOffset = ((double)ts.getNumResults() / getSliderPositions().size()) * sliderPosition.intValue();
ts.setCurrentOffset((int)newOffset);
logger.log(Level.INFO, "Slider: pos:" + sliderPosition.intValue() + " offset:" + newOffset);
setTableState(getTableState()); // persist !
}
/**
* @return Returns the sliderPositions.
*/
public List getSliderPositions() {
ArrayList sliderPositions = new ArrayList();
int numPositions = java.lang.Math.min(getTableState().getNumPages(), 20);
for(int i=0;i<numPositions;i++) {
sliderPositions.add(new Integer(i));
}
return sliderPositions;
}
}
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