/*
* 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.internal.rendering.writer.vml;
import java.awt.geom.Rectangle2D;
import org.geomajas.configuration.FeatureStyleInfo;
import org.geomajas.configuration.FontStyleInfo;
import org.geomajas.configuration.LabelStyleInfo;
import org.geomajas.internal.layer.feature.InternalFeatureImpl;
import org.geomajas.internal.layer.tile.InternalTileImpl;
import org.geomajas.internal.rendering.writer.GraphicsWriter;
import org.geomajas.layer.feature.InternalFeature;
import org.geomajas.rendering.GraphicsDocument;
import org.geomajas.rendering.RenderException;
import org.geomajas.service.GeoService;
import org.geomajas.service.TextService;
import org.geotools.geometry.jts.GeometryCoordinateSequenceTransformer;
import org.opengis.referencing.operation.TransformException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
/**
* Writer for tile labels.
*
* @author Jan De Moerloose
* @author Pieter De Graef
*/
public class VmlLabelTileWriter implements GraphicsWriter {
private final Logger log = LoggerFactory.getLogger(VmlLabelTileWriter.class);
private GeometryFactory factory;
private GeometryCoordinateSequenceTransformer transformer;
private int coordWidth;
private int coordHeight;
private LabelStyleInfo labelStyle;
private GeoService geoService;
private TextService textService;
public VmlLabelTileWriter(int coordWidth, int coordHeight, GeometryCoordinateSequenceTransformer transformer,
LabelStyleInfo labelStyle, GeoService geoService, TextService textService) {
this.coordWidth = coordWidth;
this.coordHeight = coordHeight;
this.labelStyle = labelStyle;
this.transformer = transformer;
this.geoService = geoService;
this.textService = textService;
factory = new GeometryFactory();
}
public void writeObject(Object object, GraphicsDocument document, boolean asChild) throws RenderException {
InternalTileImpl tile = (InternalTileImpl) object;
FeatureStyleInfo bgStyle = labelStyle.getBackgroundStyle();
document.writeElement("vml:group", asChild);
document.writeId("labels." + tile.getCode().toString());
document.writeAttribute("coordsize", coordWidth + "," + coordHeight);
document.writeAttribute("style", "WIDTH: " + coordWidth + "; HEIGHT: " + coordHeight);
// the shapetype
document.writeElement("vml:shapetype", true);
document.writeAttribute("id", "labels." + tile.getCode().toString() + ".style");
document.writeAttribute("style", "WIDTH: 100%; HEIGHT: 100%");
document.writeAttribute("style", "VISIBILITY: hidden");
document.writeAttribute("filled", "f");
document.writeAttribute("stroked", "f");
document.writeAttribute("coordsize", coordWidth + "," + coordHeight);
// up to shapetype
document.closeElement();
for (InternalFeature f : tile.getFeatures()) {
InternalFeatureImpl feature = (InternalFeatureImpl) f;
Coordinate pos = geoService.calcDefaultLabelPosition(feature);
if (pos == null) {
continue;
}
com.vividsolutions.jts.geom.Point p = factory.createPoint(pos);
com.vividsolutions.jts.geom.Point labelPos;
try {
labelPos = (com.vividsolutions.jts.geom.Point) transformer.transform(p);
String labelString = feature.getLabel();
// If the attribute has no value, continue with the next:
if (labelString == null || labelString.length() == 0) {
document.closeElement();
continue;
}
// Calculate label width, left and top:
Rectangle2D textBox = textService.getStringBounds(labelString, labelStyle.getFontStyle());
int boxWidth = (int) textBox.getWidth() + 8; // TODO: check why not wide enough !!!
int boxHeight = (int) textBox.getHeight() + 2;
int left = ((int) labelPos.getX()) - boxWidth / 2;
int top = ((int) labelPos.getY()) - boxHeight / 2;
// Group for an individual label (vml:group):
document.writeElement("vml:group", true);
document.writeAttribute("style", "LEFT: " + left + "px; TOP: " + top + "px; WIDTH: " + boxWidth
+ "px; HEIGHT: " + boxHeight + "px; position:absolute;");
document.writeAttribute("coordsize", boxWidth + " " + boxHeight);
// First we draw the rectangle:
document.writeElement("vml:rect", true);
document.writeAttribute("id", feature.getId() + ".label");
document.writeAttribute("style", "WIDTH: " + boxWidth + "px; HEIGHT: " + boxHeight + "px;");
document.writeAttribute("fillcolor", bgStyle.getFillColor());
document.writeAttribute("strokecolor", bgStyle.getStrokeColor());
document.writeAttribute("strokeweight", bgStyle.getStrokeWidth());
// Rect-fill element:
document.writeElement("vml:fill", true);
document.writeAttribute("opacity", Float.toString(bgStyle.getFillOpacity()));
document.closeElement();
// Rect-stroke element:
document.writeElement("vml:stroke", true);
document.writeAttribute("opacity", Float.toString(bgStyle.getStrokeOpacity()));
document.closeElement();
// Then the label-text:
document.writeElement("vml:textbox", true);
document.writeAttribute("id", feature.getId() + ".text");
document.writeAttribute("v-text-anchor", "middle");
document.writeAttribute("inset", "0px, 0px, 0px, 0px");
document.writeAttribute("style", getCssStyle(labelStyle.getFontStyle())
+ "; text-align:center; WIDTH: " + boxWidth + "px; HEIGHT: " + boxHeight + "px;");
document.writeAttribute("fillcolor", labelStyle.getFontStyle().getColor());
if (labelStyle.getFontStyle().getOpacity() > 0) {
document.writeElement("vml:fill", true);
document.writeAttribute("opacity", Float.toString(labelStyle.getFontStyle().getOpacity()));
document.closeElement();
}
// document.writeTextNode(labelString.replaceAll(" ", " "));
document.writeTextNode(labelString);
document.closeElement();
// Close the vml:rect
document.closeElement();
// Close the individual label group (vml:group):
document.closeElement();
} catch (TransformException e) {
log.warn("Label for " + feature.getId() + " could not be written!");
}
}
document.closeElement();
}
private String getCssStyle(FontStyleInfo style) {
StringBuilder css = new StringBuilder();
if (style.getColor() != null && !"".equals(style.getColor())) {
css.append("color:");
css.append(style.getColor());
css.append(";");
}
if (style.getFamily() != null && !"".equals(style.getFamily())) {
css.append("font-family:");
css.append(style.getFamily());
css.append(";");
}
if (style.getStyle() != null && !"".equals(style.getStyle())) {
css.append("font-style:");
css.append(style.getStyle());
css.append(";");
}
if (style.getWeight() != null && !"".equals(style.getWeight())) {
css.append("font-weight:");
css.append(style.getWeight());
css.append(";");
}
if (style.getSize() >= 0) {
css.append("font-size:");
css.append(style.getSize());
css.append("px;");
}
return css.toString();
}
}