/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.widget.searchandfilter.client.widget.geometricsearch;
import org.geomajas.geometry.Coordinate;
import org.geomajas.gwt.client.controller.editing.EditController.EditMode;
import org.geomajas.gwt.client.gfx.paintable.GfxGeometry;
import org.geomajas.gwt.client.gfx.style.ShapeStyle;
import org.geomajas.gwt.client.spatial.geometry.GeometryFactory;
import org.geomajas.gwt.client.spatial.geometry.LineString;
import org.geomajas.gwt.client.spatial.geometry.LinearRing;
import org.geomajas.gwt.client.spatial.geometry.Polygon;
import org.geomajas.gwt.client.widget.MapWidget;
import org.geomajas.gwt.client.widget.MapWidget.RenderGroup;
import org.geomajas.gwt.client.widget.MapWidget.RenderStatus;
import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseEvent;
import com.google.gwt.event.dom.client.MouseMoveEvent;
import com.google.gwt.event.dom.client.MouseUpEvent;
import com.google.gwt.user.client.Event;
/**
* Drawing controller for Polygon geometries.
*
* @author Bruce Palmkoeck
*/
public class PolygonDrawController extends AbstractFreeDrawingController {
private GfxGeometry tempLine1;
private GfxGeometry tempLine2;
private GfxGeometry tempLineEnd;
private ShapeStyle drawStyleGood = new ShapeStyle("#FF7F00", 0.3f, "#FF7F00", 1, 2);
private ShapeStyle drawStyleBad = new ShapeStyle("#FF3322", 0.4f, "#FF3322", 1, 2);
// -------------------------------------------------------------------------
// Constructor:
// -------------------------------------------------------------------------
public PolygonDrawController(MapWidget mapWidget, AbstractFreeDrawingController parent) {
super(mapWidget, parent);
factory = new GeometryFactory(mapWidget.getMapModel().getSrid(), mapWidget.getMapModel().getPrecision());
geometry = factory.createPolygon(null, null);
}
// -------------------------------------------------------------------------
// DrawController implementation:
// -------------------------------------------------------------------------
public void cleanup() {
removeTempAll();
}
public boolean isBusy() {
// busy when inserting or dragging has started
return getEditMode() == EditMode.INSERT_MODE || getEditMode() == EditMode.DRAG_MODE;
}
// -------------------------------------------------------------------------
// MapController implementation:
// -------------------------------------------------------------------------
public void onMouseDown(MouseDownEvent event) {
if (event.getNativeButton() != Event.BUTTON_RIGHT) {
createTempLine();
}
}
public void onMouseMove(MouseMoveEvent event) {
updateTempLine(event);
}
public void onMouseUp(MouseUpEvent event) {
if (event.getNativeButton() != Event.BUTTON_RIGHT) {
Coordinate[] oldCoords = null;
Coordinate[] newCoords;
int length = 0;
if (geometry.getCoordinates() != null) {
length = geometry.getCoordinates().length;
oldCoords = geometry.getCoordinates();
}
newCoords = new Coordinate[length + 1];
if (oldCoords != null) {
System.arraycopy(oldCoords, 0, newCoords, 0, length);
}
LinearRing linearRing;
if (newCoords.length < 2) {
newCoords[length] = getWorldPosition(event);
} else {
newCoords[length] = newCoords[length - 1];
newCoords[length - 1] = getWorldPosition(event);
}
linearRing = factory.createLinearRing(newCoords);
geometry = factory.createPolygon(linearRing, null);
Coordinate[] srCoords = new Coordinate[geometry.getCoordinates().length];
Coordinate[] worldCoords = geometry.getCoordinates();
for (int i = 0; i < srCoords.length; i++) {
srCoords[i] = getTransformer().worldToPan(worldCoords[i]);
}
tempLineEnd = new GfxGeometry("LineStringEditController.updateLineEnd");
tempLineEnd.setStyle(new ShapeStyle("#FF3322", 0.5f, "#FF3322", 1, 1));
linearRing = geometry.getGeometryFactory().createLinearRing(srCoords);
Polygon polygon = geometry.getGeometryFactory().createPolygon(linearRing, null);
if (geometry.isValid()) {
tempLineEnd.setStyle(drawStyleGood);
} else {
tempLineEnd.setStyle(drawStyleBad);
}
tempLineEnd.setGeometry(polygon);
mapWidget.render(tempLineEnd, RenderGroup.VECTOR, RenderStatus.ALL);
removeTempLines();
}
}
// Getters and setters:
public void setEditMode(EditMode editMode) {
super.setEditMode(editMode);
if (editMode == EditMode.DRAG_MODE) {
removeTempLines();
}
}
// Private methods:
private void createTempLine() {
if (tempLine1 == null && geometry instanceof Polygon) {
tempLine1 = new GfxGeometry("LineStringEditController.updateLine1");
tempLine2 = new GfxGeometry("LineStringEditController.updateLine2");
if (geometry.isValid()) {
tempLine1.setStyle(drawStyleGood);
tempLine2.setStyle(drawStyleGood);
} else {
tempLine1.setStyle(drawStyleBad);
tempLine2.setStyle(drawStyleBad);
}
}
}
private void updateTempLine(MouseEvent<?> event) {
if (tempLine1 == null) {
createTempLine();
}
Polygon polygon = (Polygon) geometry;
if (polygon != null && polygon.getCoordinates() != null && polygon.getCoordinates().length > 0) {
LinearRing ring = geometry.getGeometryFactory().createLinearRing(polygon.getCoordinates());
if (ring != null && geometry.getCoordinates().length > 0) {
Coordinate[] coordinates = ring.getCoordinates();
Coordinate firstCoordinate = coordinates[0];
Coordinate lastCoordinate = coordinates[coordinates.length - 2];
LineString lineString1 = geometry.getGeometryFactory().createLineString(
new Coordinate[] { getTransformer().worldToPan(lastCoordinate), getPanPosition(event) });
tempLine1.setGeometry(lineString1);
LineString lineString2 = geometry.getGeometryFactory().createLineString(
new Coordinate[] { getTransformer().worldToPan(firstCoordinate), getPanPosition(event) });
tempLine2.setGeometry(lineString2);
mapWidget.render(tempLine1, RenderGroup.VECTOR, RenderStatus.ALL);
mapWidget.render(tempLine2, RenderGroup.VECTOR, RenderStatus.ALL);
}
}
}
private void removeTempLines() {
if (tempLine1 != null) {
mapWidget.render(tempLine1, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLine1 = null;
}
if (tempLine2 != null) {
mapWidget.render(tempLine2, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLine2 = null;
}
}
private void removeTempAll() {
if (tempLine1 != null) {
mapWidget.render(tempLine1, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLine1 = null;
}
if (tempLine2 != null) {
mapWidget.render(tempLine2, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLine2 = null;
}
if (tempLineEnd != null) {
mapWidget.render(tempLineEnd, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLineEnd = null;
}
}
}