/*
 *    Geotoolkit - An Open Source Java GIS Toolkit
 *    http://www.geotoolkit.org
 *
 *    (C) 2007 - 2008, Open Source Geospatial Foundation (OSGeo)
 *    (C) 2008 - 2009, Johann Sorel
 *
 *    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.geotoolkit.gui.swing.propertyedit;


import java.awt.Image;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;

import org.geotoolkit.gui.swing.resource.IconBundle;
import org.geotoolkit.gui.swing.resource.MessageBundle;
import org.geotoolkit.map.CoverageMapLayer;
import org.geotoolkit.map.FeatureMapLayer;
import org.geotoolkit.map.MapBuilder;
import org.geotoolkit.map.MapLayer;
import org.geotoolkit.style.MutableStyle;
import org.geotoolkit.style.visitor.CopyStyleVisitor;

/**
 * layer style panel
 *
 * @author  Johann Sorel (Puzzle-GIS)
 * @module
 */
public class LayerStylePropertyPanel extends MultiPropertyPanel {

    private Object target = null;
    
    //store a copy of the layer and it's style
    //we do this to handle properly the apply and reset actions
    private MapLayer mimicLayer = null;

    /** Creates new form DefaultMapContextCRSEditPanel */
    public LayerStylePropertyPanel() {
        super();
    }

    @Override
    public void setTarget(Object target) {
        this.target = target;
        this.mimicLayer = createMimic(target);
        super.setTarget((mimicLayer!=null)?mimicLayer:target);
    }

    @Override
    public void apply() {
        super.apply();
        if(target instanceof MapLayer && mimicLayer!=null){
            final MutableStyle newSyle = CopyStyleVisitor.INSTANCE.visit(mimicLayer.getStyle(),null);
            ((MapLayer)target).setStyle(newSyle);
        }
    }

    @Override
    public void reset() {
        setTarget(target);
    }
    
    private MapLayer createMimic(Object target){
        if(target instanceof MapLayer){
            final MapLayer origLayer = (MapLayer) target;
            final MapLayer mimic;
            if(target instanceof CoverageMapLayer){
                final CoverageMapLayer original = (CoverageMapLayer) target;
                mimic = MapBuilder.createCoverageLayer(original.getCoverageReference());
            }else if(target instanceof FeatureMapLayer){
                final FeatureMapLayer original = (FeatureMapLayer) target;
                mimic = MapBuilder.createFeatureLayer(original.getCollection(), origLayer.getStyle());
            }else{
                mimic = MapBuilder.createEmptyMapLayer();
            }
            mimic.setStyle(CopyStyleVisitor.INSTANCE.visit(origLayer.getStyle(),null));
            return mimic;
        }
        //could not mimic it, not a maplayer
        return null;
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        GroupLayout layout = new GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(Alignment.LEADING)
            .addGap(0, 0, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(Alignment.LEADING)
            .addGap(0, 0, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables

    @Override
    public String getTitle() {
        return MessageBundle.format("property_style");
    }

    @Override
    public ImageIcon getIcon() {
        return IconBundle.EMPTY_ICON;
    }

    @Override
    public Image getPreview() {
        return null;
    }
    
    @Override
    public String getToolTip() {
        return MessageBundle.format("property_style");
    }

    @Override
    public boolean canHandle(Object target) {
        return true;
    }
    
}