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.

 * 

 */

package org.gvsig.editing.gui.cad.tools;

import java.awt.Color;

import java.awt.event.InputEvent;

import java.awt.geom.Point2D;

import java.util.ArrayList;

import org.cresques.cts.ICoordTrans;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.editing.CADExtension;

import org.gvsig.editing.IEditionManager;

import org.gvsig.editing.gui.cad.CADTool;

import org.gvsig.editing.gui.cad.DefaultCADTool;

import org.gvsig.editing.gui.cad.exception.CommandException;

import org.gvsig.editing.gui.cad.tools.smc.SelectionCADToolContext;

import org.gvsig.editing.gui.cad.tools.smc.SelectionCADToolContext.SelectionCADToolState;

import org.gvsig.editing.layers.VectorialLayerEdited;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.dal.feature.EditableFeature;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.exception.NeedEditingModeException;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.handler.Handler;

import org.gvsig.fmap.geom.primitive.Curve;

import org.gvsig.fmap.geom.type.GeometryType;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.fmap.mapcontrol.MapControlDrawer;

import org.gvsig.tools.dispose.DisposableIterator;

/**

 * DOCUMENT ME!

 * 

 * @author Vicente Caballero Navarro

 */

public class SelectionCADTool extends DefaultCADTool {

    private static final Logger LOG = LoggerFactory

        .getLogger(SelectionCADTool.class);

    protected SelectionCADToolContext _fsm;

    protected Point2D firstPoint;

    protected String nextState;

    // These two arrays are used to save the current selected features and

    // geometries. The selected geometries contains an instance of the

    // geometry that can be reprojected.

    protected ArrayList selectedGeometries = new ArrayList();

    protected ArrayList selectedFeatures = new ArrayList(); 

    protected String type = PluginServices.getText(this, "simple");

    protected boolean multipleSelection = false;

    /**

     * M?todo de incio, para poner el c?digo de todo lo que se requiera de una

     * carga previa a la utilizaci?n de la herramienta.

     */

    public void init() {

        _fsm = new SelectionCADToolContext(this);

        setNextTool("selection");

        setType(PluginServices.getText(this, "simple"));

    }

    public void transition(double x, double y, InputEvent event) {

        LOG.debug("TRANSICION DESDE ESTADO {}", _fsm.getState() + " x= " + x

            + " y=" + y);

        try {

            _fsm.addPoint(x, y, event);

        } catch (Exception e) {

            init();

            PluginServices.getMDIManager().restoreCursor();

        }

        LOG.debug("ESTADO ACTUAL: ", getStatus());

    }

    public void transition(double d) {

        _fsm.addValue(d);

    }

    public void transition(String s) throws CommandException {

        if (!super.changeCommand(s)) {

            _fsm.addOption(s);

        }

    }

    public String getNextState() {

        return nextState;

    }

    protected void pointDoubleClick(MapContext map) throws ReadException {

        FLayer[] actives = map.getLayers().getActives();

    }

    /**

     * Equivale al transition del prototipo pero sin pasarle como par? metro el

     * editableFeatureSource que ya estar? creado.

     * 

     * @param selection

     *            Bitset con las geometr?as que est?n seleccionadas.

     * @param x

     *            par?metro x del punto que se pase en esta transici?n.

     * @param y

     *            par?metro y del punto que se pase en esta transici?n.

     */

    public void addPoint(double x, double y, InputEvent event) {

        SelectionCADToolState actualState =

            (SelectionCADToolState) _fsm.getPreviousState();

        String status = actualState.getName();

        LOG.debug("PREVIOUSSTATE = {}", status);

        VectorialLayerEdited vle = getVLE();

        try {

            LOG.debug("STATUS ACTUAL = {}", _fsm.getTransition());

            if (status.equals("Selection.FirstPoint")) {

                firstPoint = new Point2D.Double(x, y);

            } else

                if (status.equals("Selection.SecondPoint")) {

                } else

                    if (status.equals("Selection.WithFeatures")) {

                    } else

                        if (status.equals("Selection.WithHandlers")) {

                            addPointWithHandlers(x, y, vle.getFeatureStore(),

                                vle.getSelectedHandler());

                        }

        } catch (DataException e) {

            LOG.error("Error reding the store", e);

        }

    }

    /**

     * AddPoint method for the WithHandlers option

     * 

     * @param x

     *            selected x coordinate.

     * @param y

     *            selected y coordinate.

     * @param featureStore

     *            the selected feature store.

     * @param selectedHandlers

     *            the selected handlers

     */

    protected void addPointWithHandlers(double x, double y,

        FeatureStore featureStore, ArrayList selectedHandlers) {

        String description = PluginServices.getText(this, "move_handlers");

        DisposableIterator iterator = null;

        IEditionManager ed_man = this.getEditionManager();

        try {

            featureStore.beginEditingGroup(description);

            ICoordTrans coordTrans = getVLE().getLayer().getCoordTrans();

            for (int i=0 ; i<selectedFeatures.size() ; i++){

                Feature feature = (Feature) selectedFeatures.get(i);

                Geometry changing_geometry = (Geometry)selectedGeometries.get(i);

                Geometry old_geometry = changing_geometry.cloneGeometry();

                // Draw the moved geometry. It has been reprojected in the

                // select handler method

                for (int k = 0; k < selectedHandlers.size(); k++) {

                    Handler h = (Handler) selectedHandlers.get(k);

                    h.set(x, y);

                }                            

                //If the layer is reprojected, It is necessary

                //to reproject the geometry

                if (coordTrans != null) {

                    changing_geometry = changing_geometry.cloneGeometry();

                    changing_geometry.reProject(coordTrans.getInverted());

                    // ==========================

                    // this is already an independent clone

                    old_geometry.reProject(coordTrans.getInverted());

                }              

                // restore old geometry in feature

                // this is because selectedGeometries and

                // selectedFeature point

                // at the same geometries at least sometimes

                EditableFeature eFeature = feature.getEditable();

                eFeature.setDefaultGeometry(old_geometry);

                Feature old_geom_feature = eFeature.getNotEditableCopy();

                // set new (old remains as source for undoing)

                eFeature = old_geom_feature.getEditable();

                eFeature.setDefaultGeometry(changing_geometry);

                ed_man.updateFeature(featureStore, eFeature);

            }

            firstPoint = new Point2D.Double(x, y);

            featureStore.endEditingGroup();

        } catch (DataException e1) {

            LOG.error("Error reading the store", e1);

        } finally {

            if (iterator != null) {

                iterator.dispose();

            }

        }

    }

    /**

     * Receives second point

     * 

     * @param x

     * @param y

     * @return numFeatures selected

     */

    public long selectWithSecondPoint(double x, double y, InputEvent event) {

        VectorialLayerEdited vle = getVLE();

        PluginServices.getMDIManager().setWaitCursor();

        vle.selectWithSecondPoint(x, y);

        FeatureSet selection = null;

        try {

            selection = (FeatureSet) vle.getFeatureStore().getSelection();

            PluginServices.getMDIManager().restoreCursor();

            long countSel = selection.getSize();

            if (countSel > 0) {

                nextState = "Selection.WithSelectedFeatures";

            } else {

                nextState = "Selection.FirstPoint";

            }

            return countSel;

        } catch (ReadException e) {

            e.printStackTrace();

            return 0;

        } catch (DataException e) {

            e.printStackTrace();

            return 0;

        }

    }

    /**

     * M?todo para dibujar la lo necesario para el estado en el que nos

     * encontremos.

     * 

     * @param g

     *            Graphics sobre el que dibujar.

     * @param selectedGeometries

     *            BitSet con las geometr?as seleccionadas.

     * @param x

     *            par?metro x del punto que se pase para dibujar.

     * @param y

     *            par?metro x del punto que se pase para dibujar.

     */

    public void drawOperation(MapControlDrawer renderer, double x, double y) {

        SelectionCADToolState actualState = _fsm.getState();

        String status = actualState.getName();

        VectorialLayerEdited vle = getVLE();

        if (vle == null) {

            return;

        }

        ArrayList selectedHandler = vle.getSelectedHandler();

        ViewPort vp = vle.getLayer().getMapContext().getViewPort();

        if (status.equals("Selection.SecondPoint")) {

            // Dibuja el rect?ngulo de selecci?n

            Curve curve = createCurve();

            curve.addMoveToVertex(createPoint(firstPoint.getX(),

                firstPoint.getY()));

            curve.addVertex(createPoint(x, firstPoint.getY()));

            curve.addVertex(createPoint(x, y));

            curve.addVertex(createPoint(firstPoint.getX(), y));

            curve.addVertex(createPoint(firstPoint.getX(), firstPoint.getY()));

            renderer

                .draw(curve, mapControlManager.getGeometrySelectionSymbol());

            return;

        } else

            //If there is a handler to move...

            if (status.equals("Selection.WithHandlers")) {

                drawWithHandlers(renderer, x, y, selectedHandler);

            }

    }

    /**

     * Draw method to draw a geometry with handlers

     * 

     * @param mapControlDrawer

     *            object used to draw.

     * @param x

     *            selected x coordinate.

     * @param y

     *            selected y coordinate.

     * @param selectedHandlers

     *            the selected handlers

     */

    protected void drawWithHandlers(MapControlDrawer mapControlDrawer, double x,

        double y, ArrayList selectedHandlers) {

        // Moving the handlers that have been selected

        // in the selectHandlers method

        double xPrev = 0;

        double yPrev = 0;

        for (int k = 0; k < selectedHandlers.size(); k++) {

            Handler h = (Handler) selectedHandlers.get(k);

            xPrev = h.getPoint().getX();

            yPrev = h.getPoint().getY();

            h.set(x, y);

        }

        // Draw the moved geometry. It has been reprojected in the

        // select handler method

        for (int i = 0; i < selectedGeometries.size(); i++) {

            Geometry geom = (Geometry) selectedGeometries.get(i);

            mapControlDrawer.setColor(Color.gray);

            mapControlDrawer.draw(geom,

                mapControlManager.getAxisReferenceSymbol());

        }

        for (int k = 0; k < selectedHandlers.size(); k++) {

            Handler h = (Handler) selectedHandlers.get(k);

            h.set(xPrev, yPrev);

        } 

    }

    /**

     * Add a diferent option.

     * 

     * @param sel

     *            DOCUMENT ME!

     * @param s

     *            Diferent option.

     */

    public void addOption(String s) {

        SelectionCADToolState actualState =

            (SelectionCADToolState) _fsm.getPreviousState();

        String status = actualState.getName();

        LOG.debug("PREVIOUSSTATE = {}", status);

        LOG.debug("STATUS ACTUAL = {}", _fsm.getTransition());

        if (s.equals(PluginServices.getText(this, "cancel"))) {

            init();

            return;

        }

        if (status.equals("Selection.FirstPoint")) {

            setType(s);

            return;

        }

        init();

    }

    /*

     * (non-Javadoc)

     * 

     * @see com.iver.cit.gvsig.gui.cad.CADTool#addvalue(double)

     */

    public void addValue(double d) {

    }

    public String getStatus() {

        try {

            SelectionCADToolState actualState =

                (SelectionCADToolState) _fsm.getPreviousState();

            String status = actualState.getName();

            return status;

        } catch (NullPointerException e) {

            return "Selection.FirstPoint";

        }

    }

    public void end() {

        if (!getNextTool().equals("selection")) {

            CADExtension.setCADTool(getNextTool(), false);

        }

    }

    public String getName() {

        return PluginServices.getText(this, "selection_");

    }

    public boolean selectFeatures(double x, double y, InputEvent event) {

        SelectionCADToolState actualState = _fsm.getState();

        String status = actualState.getName();

        VectorialLayerEdited vle = getVLE();

        multipleSelection = event.isControlDown();

        if ((status.equals("Selection.FirstPoint"))

            || (status.equals("Selection.WithSelectedFeatures"))) {

            PluginServices.getMDIManager().setWaitCursor();

            firstPoint = new Point2D.Double(x, y);

            try {

                vle.getFeatureStore().beginEditingGroup(getName());

                vle.selectWithPoint(x, y, multipleSelection);

                vle.getFeatureStore().endEditingGroup();

            } catch (NeedEditingModeException e) {

                NotificationManager.showMessageError(getName(), e);

            } catch (ReadException e) {

                NotificationManager.showMessageError(getName(), e);

            }

            PluginServices.getMDIManager().restoreCursor();

        }

        FeatureSet selection = null;

        try {

            selection = (FeatureSet) vle.getFeatureStore().getSelection();

            long countSel = selection.getSize();

            if (countSel > 0) {

                nextState = "Selection.WithSelectedFeatures";

                return true;

            } else {

                {

                    nextState = "Selection.SecondPoint";

                    return true;

                }

            }

        } catch (ReadException e) {

            LOG.error("Error selecting the features", e);

            return false;

        } catch (DataException e) {

            LOG.error("Error selecting the features", e);

            return false;

        }

    }

    public int selectHandlers(double x, double y, InputEvent event) {

        Point2D auxPoint = new Point2D.Double(x, y);

        VectorialLayerEdited vle = getVLE();

        //Gets the current selected handlers 

        ArrayList selectedHandler = vle.getSelectedHandler();

        FeatureSet selection = null;

        DisposableIterator iterator = null;

        try {

            selection = (FeatureSet) vle.getFeatureStore().getSelection();

            long countSel = selection.getSize();

            LOG.debug("DENTRO DE selectHandlers. selectedRow.size = {}",

                countSel);

            selectedHandler.clear();

            //Clear the previous selection

            clearCurrentSelection();

            // Se comprueba si se pincha en una gemometr?a

            PluginServices.getMDIManager().setWaitCursor();

            double tam =

                getCadToolAdapter().getMapControl().getViewPort()

                    .toMapDistance(mapControlManager.getTolerance());

            Handler[] handlers = null;

            selectedGeometries.clear();

            iterator = selection.fastIterator();

            ICoordTrans coordTrans = getVLE().getLayer().getCoordTrans();

            while (iterator.hasNext()) {

                Feature feature = (Feature) iterator.next();

                //If the layer is reprojected, the tolerance is not applicable. It is necessary

                //to reproject the geometry

                Geometry geometry = feature.getDefaultGeometry();

                if (coordTrans != null){

                    geometry = geometry.cloneGeometry();

                    geometry.reProject(coordTrans);

                }

                handlers = geometry.getHandlers(Geometry.SELECTHANDLER);

                // y miramos los handlers de cada entidad seleccionada

                double min = tam;

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

                    Point2D handlerPoint = handlers[j].getPoint();

                    double distance = auxPoint.distance(handlerPoint);

                    if (distance <= min) {

                        min = distance;

                        selectedHandler.add(handlers[j]);

                        selectedGeometries.add(geometry);

                        selectedFeatures.add(feature);

                    }

                }

            }

            PluginServices.getMDIManager().restoreCursor();

        } catch (DataException e) {

            LOG.error("Error reading the store", e);

        } finally {

            if (iterator != null) {

                iterator.dispose();

            }

        }

        return selectedHandler.size();

    }

    protected void clearCurrentSelection(){

        selectedFeatures.clear();

        selectedGeometries.clear();

    }

    public String getType() {

        return type;

    }

    public void setType(String type) {

        if (type.equals("S") || type.equals("s")) {

            this.type = PluginServices.getText(this, "simple");

        } else {

            this.type = type;

        }

    }

    public String toString() {

        return "_selection";

    }

    public void multipleSelection(boolean b) {

        multipleSelection = b;

    }

    @Override

    public boolean isApplicable(GeometryType geometryType) {

        return true;

    }

    @Override

    protected int[] getSupportedGeometryTypes() {

        return null;

    }

    /**

     * Tells whether the tool provided is an instance of this class

     * 

     * @param tool

     * @param exactly_this requires that the object is an instance of

     * this class and not an instance of a subclass

     *  

     * @return 

     */

    public static boolean isInstance(CADTool tool, boolean exactly_this) {

        if (exactly_this) {

            return tool.getClass() == SelectionCADTool.class;

        } else {

            return (tool instanceof SelectionCADTool);

        }

    }

}