/*
* 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.gwt.client.gfx.painter;
import org.geomajas.geometry.Coordinate;
import org.geomajas.gwt.client.gfx.GraphicsContext;
import org.geomajas.gwt.client.gfx.MapContext;
import org.geomajas.gwt.client.gfx.Paintable;
import org.geomajas.gwt.client.gfx.Painter;
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.spatial.geometry.MultiLineString;
import org.geomajas.gwt.client.spatial.geometry.MultiPoint;
import org.geomajas.gwt.client.spatial.geometry.MultiPolygon;
import org.geomajas.gwt.client.spatial.geometry.Point;
import org.geomajas.gwt.client.spatial.geometry.Polygon;
/**
* <p>
* Painter implementation for geometries.
* </p>
*
* @author Pieter De Graef
* @author Jan De Moerloose
*/
public class GeometryPainter implements Painter {
/**
* Return the class-name of the type of object this painter can paint.
*
* @return Return the class-name as a string.
*/
public String getPaintableClassName() {
return GfxGeometry.class.getName();
}
/**
* The actual painting function. Draws the circles with the object's id.
*
* @param paintable
* A {@link org.geomajas.gwt.client.gfx.paintable.Text} object.
* @param group
* The group where the object resides in (optional).
* @param context
* A MapContext object, responsible for actual drawing.
*/
public void paint(Paintable paintable, Object group, MapContext context) {
if (paintable != null) {
GfxGeometry gfxGeometry = (GfxGeometry) paintable;
Geometry geometry = gfxGeometry.getGeometry();
ShapeStyle shapeStyle = gfxGeometry.getStyle();
if (geometry instanceof LineString) {
context.getVectorContext().drawLine(group, gfxGeometry.getId(), (LineString) geometry, shapeStyle);
} else if (geometry instanceof MultiLineString) {
MultiLineString m = (MultiLineString) geometry;
String gfxId = gfxGeometry.getId();
GraphicsContext gc = context.getVectorContext();
for (int i = 0; i < m.getNumGeometries(); i++) {
gc.drawLine(group, gfxId + "." + i, (LineString) m.getGeometryN(i), shapeStyle);
}
} else if (geometry instanceof Polygon) {
context.getVectorContext().drawPolygon(group, gfxGeometry.getId(), (Polygon) geometry, shapeStyle);
} else if (geometry instanceof MultiPolygon) {
MultiPolygon m = (MultiPolygon) geometry;
String gfxId = gfxGeometry.getId();
GraphicsContext gc = context.getVectorContext();
for (int i = 0; i < m.getNumGeometries(); i++) {
gc.drawPolygon(group, gfxId + "." + i, (Polygon) m.getGeometryN(i), shapeStyle);
}
} else if (geometry instanceof Point) {
context.getVectorContext().drawSymbolDefinition(group, gfxGeometry.getId() + ".def",
gfxGeometry.getSymbolInfo(), shapeStyle, null);
context.getVectorContext().drawSymbol(group, gfxGeometry.getId(), geometry.getCoordinate(), shapeStyle,
gfxGeometry.getId() + ".def");
} else if (geometry instanceof MultiPoint) {
Coordinate[] coordinates = geometry.getCoordinates();
String gfxId = gfxGeometry.getId();
GraphicsContext gc = context.getVectorContext();
String styleTypeDef = gfxGeometry.getId() + ".def";
context.getVectorContext().drawSymbolDefinition(group, styleTypeDef, gfxGeometry.getSymbolInfo(),
shapeStyle, null);
for (int i = 0; i < coordinates.length; i++) {
gc.drawSymbol(group, gfxId + "." + i, coordinates[i], shapeStyle, styleTypeDef);
}
}
}
}
/**
* Delete a {@link Paintable} object from the given {@link MapContext}. It
* the object does not exist, nothing will be done.
*
* @param paintable
* The object to be painted.
* @param group
* The group where the object resides in (optional).
* @param context
* The context to paint on.
*/
public void deleteShape(Paintable paintable, Object group, MapContext context) {
GfxGeometry gfxGeometry = (GfxGeometry) paintable;
Geometry geom = gfxGeometry.getGeometry();
if (geom instanceof Point || geom instanceof MultiPoint) {
context.getVectorContext().deleteElement(group, gfxGeometry.getId() + ".def");
}
if (geom instanceof MultiPolygon || geom instanceof MultiLineString || geom instanceof MultiPoint) {
GraphicsContext gc = context.getVectorContext();
String gfxId = gfxGeometry.getId();
for (int i = 0; i < geom.getNumGeometries(); i++) {
gc.deleteElement(group, gfxId + "." + i);
}
} else {
context.getVectorContext().deleteElement(group, gfxGeometry.getId());
}
}
}