/*
* 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.Geometry;
import org.geomajas.gwt.client.spatial.geometry.LineString;
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 LineString geometries.
*
* @author Bruce Palmkoeck
*/
public class LineStringDrawController extends AbstractFreeDrawingController {
private GfxGeometry tempLine;
private GfxGeometry tempLineEnd;
private ShapeStyle drawStyle = new ShapeStyle("#FF7F00", 0f, "#FF7F00", 1, 2);
// -------------------------------------------------------------------------
// Constructor:
// -------------------------------------------------------------------------
public LineStringDrawController(MapWidget mapWidget, AbstractFreeDrawingController parent) {
super(mapWidget, parent);
geometry = factory.createLineString(new Coordinate[0]);
}
// -------------------------------------------------------------------------
// DrawController implementation:
// -------------------------------------------------------------------------
public void cleanup() {
removeTempLine();
}
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(geometry);
}
}
public void onMouseMove(MouseMoveEvent event) {
updateTempLine(geometry, event);
}
public void onMouseUp(MouseUpEvent event) {
if (event.getNativeButton() != Event.BUTTON_RIGHT) {
Coordinate[] newCoords;
int length;
length = geometry.getCoordinates().length;
Coordinate[] oldCoords = geometry.getCoordinates();
newCoords = new Coordinate[length + 1];
System.arraycopy(oldCoords, 0, newCoords, 0, length);
newCoords[length] = getWorldPosition(event);
geometry = factory.createLineString(newCoords);
createTempLine(geometry);
}
}
// Getters and setters:
public void setEditMode(EditMode editMode) {
super.setEditMode(editMode);
if (editMode == EditMode.DRAG_MODE) {
removeTempLine();
}
}
// Private methods:
private void createTempLine(Geometry geometry) {
if (tempLine == null) {
tempLine = new GfxGeometry("LineStringDrawController.updateLine");
tempLine.setStyle(drawStyle);
tempLineEnd = new GfxGeometry("LineStringDrawController.updateLine");
tempLineEnd.setStyle(drawStyle);
}
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]);
}
LineString lineString = geometry.getGeometryFactory().createLineString(srCoords);
tempLine.setGeometry(lineString);
}
private void updateTempLine(Geometry geometry, MouseEvent<?> event) {
if (tempLine == null) {
createTempLine(geometry);
}
Coordinate[] oldCoords = tempLine.getGeometry().getCoordinates();
if (oldCoords != null && oldCoords.length > 0) {
Coordinate[] newCoords = new Coordinate[oldCoords.length + 1];
System.arraycopy(oldCoords, 0, newCoords, 0, oldCoords.length);
newCoords[oldCoords.length] = getPanPosition(event);
LineString lineString = geometry.getGeometryFactory().createLineString(newCoords);
tempLineEnd.setGeometry(lineString);
mapWidget.render(tempLineEnd, RenderGroup.VECTOR, RenderStatus.UPDATE);
}
}
private void removeTempLine() {
if (tempLine != null) {
mapWidget.render(tempLine, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLine = null;
}
if (tempLineEnd != null) {
mapWidget.render(tempLineEnd, RenderGroup.VECTOR, RenderStatus.DELETE);
tempLineEnd = null;
}
}
}