| gvSIG desktop 1

/*

 * Created on 30-jun-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: AbstractGeoprocessGridbagPanel.java 7304 2006-09-15 10:44:24Z caballero $

 * $Log$

 * Revision 1.2  2006-09-15 10:42:54  caballero

 * extensibilidad de documentos

 *

 * Revision 1.1  2006/08/11 16:11:38  azabala

 * first version in cvs

 *

 * Revision 1.2  2006/07/04 16:43:18  azabala

 * *** empty log message ***

 *

 * Revision 1.1  2006/07/03 20:28:20  azabala

 * *** empty log message ***

 *

 *

 */

package com.iver.cit.gvsig.geoprocess.core.gui;

import java.awt.BorderLayout;

import java.awt.Component;

import java.awt.GridBagConstraints;

import java.awt.Insets;

import java.awt.Rectangle;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.Arrays;

import javax.swing.BorderFactory;

import javax.swing.DefaultComboBoxModel;

import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JComboBox;

import javax.swing.JFileChooser;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.border.EtchedBorder;

import org.gvsig.gui.beans.swing.GridBagLayoutPanel;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.fmap.DriverException;

import com.iver.cit.gvsig.fmap.drivers.DriverIOException;

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

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

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

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

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

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

import com.iver.cit.gvsig.project.documents.view.legend.CreateSpatialIndexMonitorableTask;

import com.iver.utiles.GenericFileFilter;

import com.iver.utiles.swing.threads.IMonitorableTask;

/**

 * Abstract base panel to easily build GeoprocessPanels

 * (View GUI component with which user could launch a given

 * geoprocess).

 * 

 * All panels that extends this class will have a header 

 * (textual label that describes the geoprocess).

 * 

 * In the next row, they will have a layer combo box, where users could

 * select the input layer of the geoprocess (all geoprocesses at least

 * will work with an input layer), and a check box to specify working only

 * with input layer selection.

 * 

 * Nex, each descendant panels must implement addSpecificDesign()

 * abstract method, to add specific components with which users could

 * introduce the information needed by the geoprocess.

 * 

 * Finally, the last row has a panel to allow users to select where

 * to save the results of the geoprocess.

 * 

 * 

 * 

 * @author azabala

 *

 */

public abstract class AbstractGeoprocessGridbagPanel extends GridBagLayoutPanel implements

IGeoprocessPanel{

        protected final int DEFAULT_FILL = GridBagConstraints.BOTH;

        /**

         * textual description of the associated geoprocess

         */

        protected String titleText;

        /**

         * View's layers showed in TOC

         */

        protected FLayers layers;

        /**

         * Combo box to show layer names to user

         */

        protected JComboBox layersComboBox;

        /**

         * Check box to specify that geoprocess will only process

         * input layer selection 

         */

        protected JCheckBox selectedOnlyCheckBox;

        /**

         * Shows the number of selected features of input layer

         */

        protected JLabel numSelectedLabel;

        /**

         * Text field to show user the full path (or a representative string)

         * of the result layer selection

         */

        protected JTextField resultTf;

        /**

         * Default constructor

         *

         */

        public AbstractGeoprocessGridbagPanel(FLayers layers, String titleText) {

                super();

                this.layers = layers;

                this.titleText = titleText;

                initialize();

        }

        protected void initialize(){

                Insets insets = new Insets(5, 5, 5, 5);

                addComponent(new JLabel(titleText), insets);

                JLabel firstLayerLab = new JLabel(PluginServices.

                                getText(this, "Cobertura_de_entrada")+":");

                JComboBox layersComboBox = getLayersComboBox();

                addComponent(firstLayerLab, layersComboBox, GridBagConstraints.BOTH, insets);

                addComponent(getSelectedOnlyCheckBox(), GridBagConstraints.BOTH, insets);

                String numSelectedText = PluginServices.

                        getText(this, "Numero_de_elementos_seleccionados") + ":";

                numSelectedLabel = new JLabel("00");

                addComponent(numSelectedText, numSelectedLabel, insets);

                addSpecificDesign();

                JPanel aux = new JPanel(new BorderLayout());

                String resultLayerText = PluginServices.

                                getText(this, "Cobertura_de_salida") + ":";

                resultTf = getFileNameResultTextField();

                JButton openButton = getOpenResultButton();

        aux.add(resultTf, BorderLayout.WEST);

        aux.add(new JLabel(" "), BorderLayout.CENTER);

        aux.add(openButton, BorderLayout.EAST);

        addComponent(resultLayerText, aux, GridBagConstraints.HORIZONTAL, insets );

                setBounds(0, 0, 520, 410);

        }

        protected void initSelectedItemsJCheckBox() {

                String selectedLayer = (String) layersComboBox.getSelectedItem();

                FLyrVect inputLayer = (FLyrVect) layers.getLayer(selectedLayer);

                FBitSet fBitSet = null;

                try {

                        fBitSet = inputLayer.getRecordset().getSelection();

                } catch (DriverException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                if (fBitSet.cardinality() == 0) {

                        selectedOnlyCheckBox.setEnabled(false);

                        selectedOnlyCheckBox.setSelected(false);

                } else {

                        selectedOnlyCheckBox.setEnabled(true);

                        selectedOnlyCheckBox.setSelected(true);

                }

                selectedOnlyCheckBox.setSelected(false);

                updateNumSelectedFeaturesLabel();

        }

    protected void updateNumSelectedFeaturesLabel() {

        if (selectedOnlyCheckBox.isSelected()) {

            FLyrVect inputSelectable = (FLyrVect)(layers.getLayer((String)layersComboBox.getSelectedItem()));

            FBitSet fBitSet = null;

                        try {

                                fBitSet = inputSelectable.getRecordset().getSelection();

                        } catch (DriverException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        }

                        numSelectedLabel.setText(new Integer(fBitSet.cardinality()).toString());

        } else {

                ReadableVectorial va = ((SingleLayer)(layers.

                                getLayer((String)layersComboBox.

                                                getSelectedItem()))).

                                                                getSource();

            try {

                    numSelectedLabel.setText(new Integer(va.getShapeCount()).toString());

            } catch (DriverIOException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

        private JButton getOpenResultButton() {

                JButton        openResultButton = new JButton();

                openResultButton.setText(PluginServices.getText(this, "Abrir"));

                openResultButton.addActionListener(new java.awt.event.ActionListener() {

                                public void actionPerformed(java.awt.event.ActionEvent e) {

                                        openResultFile();

                                }

                        }

                );

                return openResultButton;

        }

        /**

         * This method must be overwrited by all descendant classes to

         * add specific desing of each Geoprocess Panel.

         */

        protected abstract void addSpecificDesign();

        /**

         * Returns the layer selected in layer combo box

         * 

         * @return

         */

        public FLyrVect getInputLayer() {

                FLyrVect solution = null;

                String selectedLayer = (String) layersComboBox.getSelectedItem();

                solution = (FLyrVect) layers.getLayer(selectedLayer);

                return solution;

        }

        /**

         * Sets view's layers from the TOC

         * 

         * @param layers

         */

        public void setFLayers(FLayers layers) {

                this.layers = layers;

        }

        /**

         * Returns layers.

         * 

         * @return

         */

        public FLayers getFLayers() {

                return layers;

        }

        /**

         * Filters TOC layers to get only FLyrVect layers.

         * 

         * @param layers

         * @return

         * 

         * FIXME Mover a una utility class

         */

        protected FLyrVect[] getVectorialLayers(FLayers layers) {

                FLyrVect[] solution = null;

                ArrayList list = new ArrayList();

                int numLayers = layers.getLayersCount();

                for (int i = 0; i < numLayers; i++) {

                        FLayer layer = layers.getLayer(i);

                        if (layer instanceof FLyrVect)

                                list.add(layer);

                        else if (layer instanceof FLayers)

                                list.addAll(Arrays.asList(getVectorialLayers((FLayers) layer)));

                }

                solution = new FLyrVect[list.size()];

                list.toArray(solution);

                return solution;

        }

        /**

         * Obtains layer names from FLayers and returns like an array of strings.

         * 

         * @return

         * 

         * TODO Llevar a una utility class

         */

        protected String[] getLayerNames() {

                String[] solution = null;

                int numLayers = layers.getLayersCount();

                if (layers != null && numLayers > 0) {

                        ArrayList list = new ArrayList();

                        for (int i = 0; i < numLayers; i++) {

                                FLayer layer = layers.getLayer(i);

                                if (layer instanceof FLyrVect)

                                        list.add(layer.getName());

                                if (layer instanceof FLayers) {

                                        FLayers layers = (FLayers) layer;

                                        FLyrVect[] vectorials = getVectorialLayers(layers);

                                        for (int j = 0; j < vectorials.length; j++) {

                                                list.add(vectorials[j].getName());

                                        }

                                }

                        }// for

                        solution = new String[list.size()];

                        list.toArray(solution);

                }

                return solution;

        }

        /**

         * Shows to the user a dialog error, whith the title and message body

         * specified as parameters.

         * 

         * @param message

         *            body of the error message

         * @param title

         *            title of the error message

         */

        public void error(String message, String title) {

                JOptionPane.showMessageDialog(this, message, title,

                                JOptionPane.ERROR_MESSAGE);

        }

        /**

         * Asks to the user for the creation of a spatial index for the specified

         * layer. It will be of help for certain geoprocesses.

         * 

         * FLyrVect default spatial index is MapServer quadtree, that hasnt the

         * ability to do nearest neighbour searches.

         * 

         * For those geoprocesses that needs it (NN searches) overwrite this method

         * and use JSI RTree, or SIL RTree.

         * 

         * It returns an IMonitorableTask, a task to build the spatial index in

         * background.

         * 

         * @param layer

         * @return an ITask

         */

        public IMonitorableTask askForSpatialIndexCreation(FLyrVect layer) {

                String title = PluginServices.getText(this, "Crear_Indice");

                String confirmDialogText = PluginServices.getText(this,

                                "Crear_Indice_Pregunta_1")

                                + " "

                                + layer.getName()

                                + " "

                                + PluginServices.getText(this, "Crear_Indice_Pregunta_2");

                int option = JOptionPane.showConfirmDialog(this, confirmDialogText,

                                title, JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE,

                                null);

                if (option == JOptionPane.YES_OPTION) {

                        // Usually we want task like spatial index creation dont block

                        // GUI responses. Now, we dont want to start geoprocess execution

                        // until spatial index creation would finish, to have advantage

                        // of the spatial index

                        try {

                                CreateSpatialIndexMonitorableTask task = new CreateSpatialIndexMonitorableTask(

                                                layer);

                                return task;

                        } catch (DriverIOException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                                return null;

                        } catch (DriverException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                                return null;

                        }

                } else

                        return null;

        }

        /**

         * Confirm overwrite the output file if it allready exist.

         * 

         * 

         * @param outputFile

         * @return answer

         */

        public boolean askForOverwriteOutputFile(File outputFile) {

                String title = PluginServices.getText(this, "Sobreescribir_fichero");

                String confirmDialogText = PluginServices.getText(this,

                                "Sobreescribir_fichero_Pregunta_1")

                                + "\n'"

                                + outputFile.getAbsolutePath()

                                + "'\n"

                                + PluginServices.getText(this,

                                                "Sobreescribir_fichero_Pregunta_2");

                int option = JOptionPane.showConfirmDialog(this, confirmDialogText,

                                title, JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE,

                                null);

                if (option == JOptionPane.YES_OPTION) {

                        return true;

                }

                return false;

        }

        /**

         * Opens a dialog to select where (file, database, etc)

         * to save the result layer.

         *

         */

        public void openResultFile() {

                JFileChooser jfc = new JFileChooser();

                jfc

                                .addChoosableFileFilter(new GenericFileFilter("shp",

                                                "Ficheros SHP"));

                if (jfc.showSaveDialog((Component) PluginServices.getMainFrame()) == JFileChooser.APPROVE_OPTION) {

                        File file = jfc.getSelectedFile();

                        if (!(file.getPath().endsWith(".shp") || file.getPath().endsWith(

                                        ".SHP"))) {

                                file = new File(file.getPath() + ".shp");

                        }

                }// if

                if (jfc.getSelectedFile() != null) {

                        getFileNameResultTextField().setText(

                                        jfc.getSelectedFile().getAbsolutePath());

                }

        }

        protected JTextField getFileNameResultTextField() {

                if(resultTf == null)

                        resultTf = new JTextField(25);

                return resultTf;

        }

        public File getOutputFile() throws FileNotFoundException{

                String fileName = getFileNameResultTextField().getText();

                if(fileName.length() == 0){

                        throw new FileNotFoundException("No se ha seleccionado ningun fichero de salida");

                }

                if(! fileName.endsWith(".shp")){

                        if(! fileName.endsWith("."))

                                fileName += ".";

                        fileName += "shp";

                }

                return new File(fileName);

        }

        protected JComboBox getLayersComboBox() {

                if (layersComboBox == null) {

                        layersComboBox = new JComboBox();

                        DefaultComboBoxModel defaultModel = new DefaultComboBoxModel(

                                        getLayerNames());

                        layersComboBox.setModel(defaultModel);

                        layersComboBox.setBounds(142, 63, 260, 21);

                        layersComboBox.addItemListener(new java.awt.event.ItemListener() {

                                public void itemStateChanged(ItemEvent e) {

                                        if (e.getStateChange() == ItemEvent.SELECTED) {

                                                initSelectedItemsJCheckBox();

                                                updateNumSelectedFeaturesLabel();

                                                processLayerComboBoxStateChange(e);

                                        }

                                }// itemStateChange

                        });

                }

                return layersComboBox;

        }

        protected JCheckBox getSelectedOnlyCheckBox() {

                if (selectedOnlyCheckBox == null) {

                        selectedOnlyCheckBox = new JCheckBox();

                        selectedOnlyCheckBox.addItemListener(new ItemListener(){

                                public void itemStateChanged(ItemEvent arg0) {

                                        updateNumSelectedFeaturesLabel();

                                }});

                        selectedOnlyCheckBox.setText(PluginServices.getText(this, "Usar_solamente_los_elementos_seleccionados"));

                }

                return selectedOnlyCheckBox;

        }

        public boolean isFirstOnlySelected(){

                return getSelectedOnlyCheckBox().isSelected();

        }

        protected abstract void processLayerComboBoxStateChange(ItemEvent e);

}