/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2014, Geomatys
*
* 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.javafx.render2d.tool;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LinearRing;
import java.awt.geom.AffineTransform;
import java.awt.geom.NoninvertibleTransformException;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Cursor;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.Label;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.ScrollEvent;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.paint.Color;
import javax.measure.Unit;
import org.apache.sis.internal.referencing.j2d.AffineTransform2D;
import org.geotoolkit.display.MeasureUtilities;
import org.geotoolkit.geometry.jts.JTS;
import org.geotoolkit.gui.javafx.render2d.AbstractNavigationHandler;
import org.geotoolkit.gui.javafx.render2d.FXGridDecoration;
import org.geotoolkit.gui.javafx.render2d.FXMap;
import org.geotoolkit.gui.javafx.render2d.FXPanMouseListen;
import org.geotoolkit.gui.javafx.render2d.shape.FXGeometryLayer;
import org.geotoolkit.internal.Loggers;
import org.apache.sis.measure.Units;
/**
* Map tool to calculate areas.
*
* @author Johann Sorel (Geomatys)
*/
public class FXMesureAreaHandler extends AbstractNavigationHandler {
private static final GeometryFactory GEOMETRY_FACTORY = new GeometryFactory();
private final MouseListen mouseInputListener = new MouseListen();
private final List<Coordinate> coords = new ArrayList<>();
private final FXGeometryLayer layer = new FXGeometryLayer();
private final FXGridDecoration deco = new FXGridDecoration();
private final Label uiArea = new Label();
private final ChoiceBox<Unit> uiUnit = new ChoiceBox<>();
private final HBox pane = new HBox(10,uiArea,uiUnit);
public FXMesureAreaHandler() {
super();
uiArea.setMaxHeight(Double.MAX_VALUE);
uiUnit.setItems(FXCollections.observableArrayList(Units.valueOf("km2"), Units.SQUARE_METRE));
uiUnit.getSelectionModel().selectFirst();
pane.setAlignment(Pos.CENTER);
pane.setBackground(new Background(new BackgroundFill(Color.WHITE, new CornerRadii(10), Insets.EMPTY)));
pane.setPadding(new Insets(10, 10, 10, 10));
deco.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);
deco.getColumnConstraints().add(new ColumnConstraints(0,HBox.USE_COMPUTED_SIZE,Double.MAX_VALUE,Priority.ALWAYS,HPos.CENTER,true));
deco.getColumnConstraints().add(new ColumnConstraints(0,HBox.USE_COMPUTED_SIZE,Double.MAX_VALUE,Priority.NEVER,HPos.CENTER,true));
deco.getColumnConstraints().add(new ColumnConstraints(0,HBox.USE_COMPUTED_SIZE,Double.MAX_VALUE,Priority.ALWAYS,HPos.CENTER,true));
uiUnit.valueProperty().addListener((ObservableValue<? extends Unit> observable, Unit oldValue, Unit newValue) -> {
updateGeometry();
});
deco.add(pane, 1, 0);
}
/**
* {@inheritDoc }
*/
@Override
public void install(final FXMap component) {
super.install(component);
component.addEventHandler(MouseEvent.ANY, mouseInputListener);
component.addEventHandler(ScrollEvent.ANY, mouseInputListener);
map.setCursor(Cursor.CROSSHAIR);
map.addDecoration(layer);
map.addDecoration(deco);
}
/**
* {@inheritDoc }
*/
@Override
public boolean uninstall(final FXMap component) {
component.removeEventHandler(MouseEvent.ANY, mouseInputListener);
component.removeEventHandler(ScrollEvent.ANY, mouseInputListener);
map.removeDecoration(layer);
map.removeDecoration(deco);
super.uninstall(component);
return true;
}
private void updateGeometry(){
final List<Geometry> geoms = new ArrayList<>();
if(coords.size() == 1){
//single point
final Geometry geom = GEOMETRY_FACTORY.createPoint(coords.get(0));
JTS.setCRS(geom, map.getCanvas().getObjectiveCRS2D());
geoms.add(geom);
}else if(coords.size() == 2){
//line
final Geometry geom = GEOMETRY_FACTORY.createLineString(coords.toArray(new Coordinate[coords.size()]));
JTS.setCRS(geom, map.getCanvas().getObjectiveCRS2D());
geoms.add(geom);
}else if(coords.size() > 2){
//polygon
final Coordinate[] ringCoords = coords.toArray(new Coordinate[coords.size()+1]);
ringCoords[coords.size()] = coords.get(0);
final LinearRing ring = GEOMETRY_FACTORY.createLinearRing(ringCoords);
final Geometry geom = GEOMETRY_FACTORY.createPolygon(ring, new LinearRing[0]);
JTS.setCRS(geom, map.getCanvas().getObjectiveCRS2D());
geoms.add(geom);
}
layer.getGeometries().setAll(geoms);
if(geoms.isEmpty()){
uiArea.setText("-");
}else{
uiArea.setText(NumberFormat.getNumberInstance().format(
MeasureUtilities.calculateArea(geoms.get(0),
map.getCanvas().getObjectiveCRS2D(), uiUnit.getValue())));
}
}
private class MouseListen extends FXPanMouseListen {
public MouseListen() {
super(FXMesureAreaHandler.this);
}
@Override
public void mouseClicked(final MouseEvent e) {
if (mousebutton == MouseButton.PRIMARY) {
//add a coordinate
final AffineTransform2D trs = map.getCanvas().getObjectiveToDisplay();
try {
final AffineTransform dispToObj = trs.createInverse();
final double[] crds = new double[]{e.getX(),e.getY()};
dispToObj.transform(crds, 0, crds, 0, 1);
coords.add(new Coordinate(crds[0], crds[1]));
updateGeometry();
} catch (NoninvertibleTransformException ex) {
Loggers.JAVAFX.log(Level.WARNING, null, ex);
}
} else if (mousebutton == MouseButton.SECONDARY) {
//erase coordiantes
coords.clear();
updateGeometry();
}
}
}
}