Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {DiSiD Technologies}  {{Task}}

 */

package org.gvsig.fmap.mapcontrol.dal.feature.swing.table;

import java.awt.Component;

import java.awt.event.ActionEvent;

import java.awt.event.ItemEvent;

import java.util.EventObject;

import javax.swing.DefaultCellEditor;

import javax.swing.JOptionPane;

import javax.swing.JTable;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.i18n.Messages;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Editor for cells of type Geometry in WKT format.

 * <p>

 * If the WKT to represent a Geometry is too big, editing is not allowed, as the

 * rendering of that big text is too slow.

 * </p>

 * 

 * @author <a href="mailto:cordin@disid.com">C�sar Ordi�ana</a>

 */

public class GeometryWKTCellEditor extends TextAreaCellEditor {

        private static final GeometryManager geomManager = GeometryLocator.getGeometryManager();

        private static final Logger logger = LoggerFactory.getLogger(GeometryWKTCellEditor.class);

    public static final int DEFAULT_MAX_WKT_LENGTH = 10000;

    private static final long serialVersionUID = -2296004227902843851L;

    private Geometry nullGeometry = null;

    private int maxRowHeight;

    /**

     * Creates a new editor for Geometries in WKT format.

     */

    public GeometryWKTCellEditor() {

        this(DEFAULT_MAX_WKT_LENGTH, 160);

    }

    /**

     * Creates a new editor for Geometries in WKT format.

     * 

     * @param maxWKTLength

     *            the maximum WTK length allowed to be edited.

     * @param maxRowHeight

     *            the maximum row height for the rows with cells rendered with

     *            this component

     */

    public GeometryWKTCellEditor(int maxWKTLength, int maxRowHeight) {

        super();

        delegate = new GeometryToWKTDelegate(delegate, maxWKTLength);

        this.maxRowHeight = maxRowHeight;

        try {

                        nullGeometry = geomManager.createNullGeometry(SUBTYPES.GEOM2D);

                } catch (CreateGeometryException e) {

                        logger.error("Error creating a null geometry", e);

                }

    }

    @Override

    public Object getCellEditorValue() {

        String wkt = (String) super.getCellEditorValue();

        try {

                return geomManager.createFrom(wkt);

        } catch (Exception ex) {

            throw new WKTToGeometryException(wkt, ex);

        }

    }

    @Override

    public Component getTableCellEditorComponent(JTable table, Object value,

            boolean isSelected, int row, int column) {

        delegate.setValue(value);

        if (((GeometryToWKTDelegate) delegate).isWtkTextTooLong()) {

            JOptionPane

                    .showMessageDialog(

                            table.getParent(),

                            Messages

                    .getText("Geometria_no_editable_WKT"), Messages

                    .getText("Error_editar_geometria"),

                            JOptionPane.ERROR_MESSAGE);

            return null;

        } else {

            int height_wanted = (int) getTextArea().getPreferredSize()

                    .getHeight();

            height_wanted = height_wanted > maxRowHeight ? maxRowHeight

                    : height_wanted;

            if (height_wanted > table.getRowHeight(row)) {

                table.setRowHeight(row, height_wanted);

            }

            return editorComponent;

        }

    }

    @SuppressWarnings("serial")

    private class GeometryToWKTDelegate extends

            DefaultCellEditor.EditorDelegate {

        private DefaultCellEditor.EditorDelegate delegate;

        private boolean wtkTextTooLong = false;

        private int maxWKTLength;

        public GeometryToWKTDelegate(DefaultCellEditor.EditorDelegate delegate,

                int maxWKTLength) {

            this.delegate = delegate;

            this.maxWKTLength = maxWKTLength;

        }

        /**

         * @return the wtkTextTooLong

         */

        public boolean isWtkTextTooLong() {

            return wtkTextTooLong;

        }

        public void setValue(Object value) {

            wtkTextTooLong = false;

            String strValue = "";

            if (value != null) {

                try {

                    Geometry geometry = (Geometry) value;

                    strValue = geometry.convertToWKT();

                    if (strValue.length() > maxWKTLength) {

                        wtkTextTooLong = true;

                        delegate.setValue(null);

                    } else {

                        delegate.setValue(strValue);

                    }

                } catch (Exception ex) {

                    throw new GeometryToWKTException(ex);

                }

            }

        }

        public Object getCellEditorValue() {

            if (wtkTextTooLong) {

                return null;

            } else {

                return delegate.getCellEditorValue();

            }

        }

        public void actionPerformed(ActionEvent e) {

            delegate.actionPerformed(e);

        }

        public void cancelCellEditing() {

            delegate.cancelCellEditing();

        }

        public boolean equals(Object obj) {

            return delegate.equals(obj);

        }

        public int hashCode() {

            return delegate.hashCode();

        }

        public boolean isCellEditable(EventObject anEvent) {

            return delegate.isCellEditable(anEvent);

        }

        public void itemStateChanged(ItemEvent e) {

            delegate.itemStateChanged(e);

        }

        public boolean shouldSelectCell(EventObject anEvent) {

            return delegate.shouldSelectCell(anEvent);

        }

        public boolean startCellEditing(EventObject anEvent) {

            return delegate.startCellEditing(anEvent);

        }

        public boolean stopCellEditing() {

            return delegate.stopCellEditing();

        }

        public String toString() {

            return delegate.toString();

        }

    }

}