| gvSIG desktop 1

package com.iver.cit.gvsig.project.documents.view.legend.gui;

import com.iver.andami.PluginServices;

import com.iver.andami.messages.Messages;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.fmap.layers.FLayers;

import com.iver.cit.gvsig.fmap.layers.layerOperations.Classifiable;

import com.iver.cit.gvsig.fmap.rendering.Legend;

import com.iver.cit.gvsig.fmap.rendering.VectorialLegend;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

/**

 * Clase utilizada para reutilizar m?todos.

 *

 * @author Vicente Caballero Navarro

 */

public abstract class AbstractPanel extends JPanel {

        /**

         * Cuando hay varios capas vectoriales seleccionados, devolver? el ?ltimo.

         *

         * @param layers Grupo de layers.

         *

         * @return la primera flayer seleccionada.

         */

        protected FLayer getFirstActiveLayerVect(FLayers layers) {

                // Comprobar en openLegendManager que hay alg?n capa activo!

                FLayer[] activeLyrs = layers.getActives();

                if (activeLyrs.length == 0) {

                        JOptionPane.showMessageDialog(null,

                                Messages.getString("necesita_una_capa_activa"), "",

                                JOptionPane.ERROR_MESSAGE);

                        return null;

                }

                FLayer lyr = null;

                for (int i = 0; i < activeLyrs.length; i++) {

                        if (activeLyrs[i] instanceof FLayers) {

                                lyr = getFirstActiveLayerVect((FLayers) activeLyrs[i]);

                        }

                        if (activeLyrs[i] instanceof Classifiable) {

                                Classifiable auxC = (Classifiable) activeLyrs[i];

                                Legend theLegend = auxC.getLegend();

                                if (theLegend instanceof VectorialLegend) {

                                        lyr = (FLayer) auxC;

                                }

                        }

                }

                if (lyr == null) {

                        System.out.println(PluginServices.getText(this,

                                        "Por_favor_active_la_capa") + ".");

                        JOptionPane.showMessageDialog(null,

                                Messages.getString(PluginServices.getText(this,

                                                "necesita_una_capa_vectorial_activa")), "",

                                JOptionPane.ERROR_MESSAGE);

                        return null;

                }

                return lyr;

        }

}