MyCellEditorList.java example

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geogebra-master
package org.geogebra.desktop.gui.view.spreadsheet;

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultCellEditor;
import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JTable;

import org.geogebra.common.kernel.StringTemplate;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoList;

/**
 * Cell editor for GeoBoolean.
 * 
 * @author G.Sturr 2010-6-4
 *
 */
public class MyCellEditorList extends DefaultCellEditor
		implements ActionListener {
	private static final long serialVersionUID = 1L;
	private GeoList editGeo;
	private JComboBox comboBox;
	private DefaultComboBoxModel model;

	public MyCellEditorList() {

		super(new JComboBox());
		comboBox = (JComboBox) editorComponent;
		comboBox.setRenderer(new MyListCellRenderer());
		model = new DefaultComboBoxModel();
		comboBox.addActionListener(this);

	}

	@Override
	public void actionPerformed(ActionEvent e) {
		try {
			editGeo.setSelectedIndex(comboBox.getSelectedIndex(), false);
			editGeo.updateCascade();
			editGeo.getKernel().notifyRepaint();
			editGeo.getKernel().storeUndoInfo();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	@Override
	public Component getTableCellEditorComponent(JTable table, Object value,
			boolean isSelected, int row, int column) {

		comboBox.removeActionListener(this);
		editGeo = (GeoList) value;
		model.removeAllElements();
		for (int i = 0; i < editGeo.size(); i++) {
			model.addElement(editGeo.get(i));
		}
		comboBox.setModel(model);
		comboBox.setSelectedIndex(editGeo.getSelectedIndex());
		comboBox.addActionListener(this);
		return editorComponent;

	}

	@Override
	public Object getCellEditorValue() {
		return editGeo;
	}

	public boolean isEditing() {
		return false;
	}

	// ======================================================
	// ComboBox Cell Renderer
	// ======================================================

	/**
	 * Custom cell renderer that displays GeoElement descriptions.
	 */
	static private class MyListCellRenderer extends DefaultListCellRenderer {
		private static final long serialVersionUID = 1L;

		@Override
		public Component getListCellRendererComponent(JList list, Object value,
				int index, boolean isSelected, boolean hasFocus) {

			setBackground(Color.WHITE);
			JLabel lbl = (JLabel) super.getListCellRendererComponent(list,
					value, index, isSelected, hasFocus);
			lbl.setHorizontalAlignment(LEFT);

			if (value != null) {
				GeoElement geo = (GeoElement) value;
				if (geo.isGeoText()) {
					setText(geo.toValueString(StringTemplate.defaultTemplate));
				} else {
					setText(geo.getLabel(StringTemplate.defaultTemplate));
				}
			} else {
				setText(" ");
			}

			return lbl;
		}

	}

}