/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 * 
 *    (C) 2006-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library 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;
 *    version 2.1 of the License.
 *
 *    This library 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.
 */
package org.geotools.gui.swing.map.map2d.stream.control;

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.BorderFactory;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.border.Border;

import org.geotools.gui.swing.map.map2d.Map2D;
import org.geotools.gui.swing.map.map2d.stream.SelectableMap2D;
import org.geotools.gui.swing.map.map2d.stream.event.SelectionEvent;
import org.geotools.gui.swing.map.map2d.stream.handler.DefaultSelectionHandler;
import org.geotools.gui.swing.map.map2d.stream.handler.LasoSelectionHandler;
import org.geotools.gui.swing.map.map2d.stream.handler.SelectionHandler;
import org.geotools.gui.swing.map.map2d.stream.listener.SelectionListener;

/**
 * Handler chooser
 * 
 * @author Johann Sorel
 *
 * @source $URL$
 */
public class SelectHandlerChooser extends JComboBox {

    private Map2D map = null;
    private ItemListener listListener = new ItemListener() {

        public void itemStateChanged(ItemEvent e) {

            if (map != null && map instanceof SelectableMap2D) {
                SelectableMap2D editmap = (SelectableMap2D) map;
                editmap.setSelectionHandler((SelectionHandler) getSelectedItem());
            }
        }
    };
    private SelectionListener selectionListener = new SelectionListener() {

        public void selectionChanged(SelectionEvent event) {
        }

        public void selectionFilterChanged(SelectionEvent event) {
        }

        public void selectionHandlerChanged(SelectionEvent event) {
            removeItemListener(listListener);
            if (event.getHandler() != getSelectedItem()) {
                if (event.getHandler() instanceof DefaultSelectionHandler) {
                    setSelectedItem(defaultHandler);
                } else if (event.getHandler() instanceof LasoSelectionHandler) {
                    setSelectedItem(lasoHandler);
                } else {

                }
            }
            addItemListener(listListener);
        }
    };
    private final DefaultSelectionHandler defaultHandler = new DefaultSelectionHandler();
    private final LasoSelectionHandler lasoHandler = new LasoSelectionHandler();

    public SelectHandlerChooser() {
        setRenderer(new listRenderer());

        addItem(defaultHandler);
        addItem(lasoHandler);

        addItemListener(listListener);

        initComboBox();
        
        setOpaque(false);
        setBorder(null);
    }

    private void initComboBox() {

        removeItemListener(listListener);

        if (map != null && map instanceof SelectableMap2D) {
            setEnabled(true);
            SelectableMap2D select = (SelectableMap2D) map;

            if (select.getSelectionHandler() instanceof DefaultSelectionHandler) {
                setSelectedItem(defaultHandler);
            } else if (select.getSelectionHandler() instanceof LasoSelectionHandler) {
                setSelectedItem(lasoHandler);
            } else {

            }

        } else {
            setEnabled(false);
        }

        addItemListener(listListener);
    }

    public Map2D getMap() {
        return map;
    }

    public void setMap(Map2D map2d) {

        if (map != null) {
            if (map instanceof SelectableMap2D) {
                ((SelectableMap2D) map).removeSelectableMap2DListener(selectionListener);
            }
        }

        map = map2d;

        if (map != null) {
            if (map instanceof SelectableMap2D) {
                ((SelectableMap2D) map).addSelectableMap2DListener(selectionListener);
            }
        }

        initComboBox();
    }

    //----------------private classes-------------------------------------------
    private class listRenderer extends DefaultListCellRenderer {

        private JLabel lbl = new JLabel();
        private final Border border = BorderFactory.createLineBorder(Color.LIGHT_GRAY, 1);
        private final Border nullborder = BorderFactory.createEmptyBorder(1, 1, 1, 1);

        @Override
        public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
            if (value instanceof SelectionHandler) {
                lbl.setIcon(((SelectionHandler) value).getIcon());
                lbl.setText(((SelectionHandler) value).getTitle());
            } else {
                lbl.setIcon(null);
                lbl.setText(value.toString());
            }

            if (isSelected) {
                lbl.setBorder(border);
            } else {
                lbl.setBorder(nullborder);
            }

            return lbl;
        }
    }
}