/*
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org
This file is part of GeoGebra.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation.
*/
package org.geogebra.common.kernel.advanced;
import org.geogebra.common.kernel.Construction;
import org.geogebra.common.kernel.algos.AlgoElement;
import org.geogebra.common.kernel.commands.Commands;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoList;
import org.geogebra.common.kernel.geos.GeoNumeric;
/**
* Selected index of a GeoList object.
*
*/
public class AlgoSelectedIndex extends AlgoElement {
private GeoList geoList; // input
private GeoNumeric index; // output
/**
* Creates new selected index algo
*
* @param cons
* construction
* @param label
* output label
* @param geoList
* list
*/
public AlgoSelectedIndex(Construction cons, String label, GeoList geoList) {
super(cons);
this.geoList = geoList;
index = new GeoNumeric(cons);
setInputOutput();
compute();
index.setLabel(label);
}
@Override
public Commands getClassName() {
return Commands.SelectedIndex;
}
@Override
protected void setInputOutput() {
input = new GeoElement[1];
input[0] = geoList;
setOutputLength(1);
setOutput(0, index);
setDependencies(); // done by AlgoElement
}
/**
* Returns the selected index
*
* @return the selected index
*/
public GeoElement getElement() {
return index;
}
@Override
public final void compute() {
if (!geoList.isDefined()) {
index.setUndefined();
return;
}
index.setValue(geoList.getSelectedIndex() + 1);
}
}