sascha@422: package de.intevation.gnv.jfreechart;
sascha@422:
sascha@779: import java.awt.BasicStroke;
sascha@422: import java.awt.Color;
sascha@779: import java.awt.Font;
sascha@779: import java.awt.FontMetrics;
sascha@422: import java.awt.Graphics2D;
sascha@422: import java.awt.Paint;
sascha@422: import java.awt.Shape;
sascha@447:
sascha@422: import java.awt.geom.GeneralPath;
sascha@779:
sascha@779: import java.awt.geom.Rectangle2D.Double;
sascha@779:
sascha@422: import java.awt.geom.Rectangle2D;
sascha@779:
sascha@779: import java.util.ArrayList;
sascha@779:
sascha@779: import org.apache.log4j.Logger;
sascha@779:
sascha@779: import org.jfree.chart.axis.ValueAxis;
sascha@422:
sascha@422: import org.jfree.data.Range;
sascha@422:
sascha@779: import org.jfree.text.TextUtilities;
sascha@450:
sascha@450: import org.jfree.ui.RectangleEdge;
sascha@450:
sascha@422: /**
ingo@795: * This renderer is used to draw polygons into a Graphics object.
sascha@803: *
sascha@780: * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
sascha@780: * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
sascha@422: */
sascha@422: public class PolygonRenderer
sascha@422: {
sascha@447: private static Logger log = Logger.getLogger(
sascha@447: PolygonRenderer.class);
sascha@447:
ingo@795: /**
ingo@795: * This interfaces describes a single method to retrieve a Paint object
ingo@795: * for a given index.
ingo@795: */
ingo@795: public interface PaintLookup {
sascha@422:
ingo@795: /**
ingo@795: *
ingo@795: * @param index Index.
ingo@795: * @return Paint
ingo@795: */
ingo@795: Paint getPaint(int index);
sascha@422:
sascha@422: } // interface PaintLookup
sascha@422:
ingo@795: /**
ingo@795: * This class is used to generate labels for a given series.
ingo@795: */
ingo@795: public static class DefaultLabelGenerator
sascha@450: implements PolygonSeriesLabelGenerator
sascha@450: {
ingo@795: /**
ingo@795: * Construts an empty DefaultLabelGenerator.
ingo@795: */
ingo@795: public DefaultLabelGenerator() {
sascha@450: }
sascha@422:
ingo@795: /**
ingo@795: *
ingo@795: * @param series A PolygonSeries.
ingo@795: * @return The label of series.
ingo@795: */
ingo@795: public String generateLabel(PolygonSeries series) {
sascha@450: Object label = series.getAttribute("label");
sascha@450: return label != null
sascha@450: ? toString(label)
sascha@450: : null;
sascha@450: }
sascha@422:
ingo@795: /**
ingo@795: *
ingo@795: * @param label Object
ingo@795: * @return String representaton of label.
ingo@795: */
ingo@795: protected String toString(Object label) {
sascha@450: return label.toString();
sascha@450: }
sascha@450: } // class DefaultLabelGenerator
sascha@422:
ingo@795: /**
ingo@795: * Constructor.
ingo@795: */
ingo@795: public static final PolygonSeriesLabelGenerator
sascha@450: DEFAULT_LABEL_GENERATOR_INSTANCE = new DefaultLabelGenerator();
sascha@450:
ingo@795: protected PaintLookup lookup;
ingo@815:
sascha@450: protected PolygonSeriesLabelGenerator labelGenerator;
sascha@422:
ingo@815:
sascha@422: public PolygonRenderer(PaintLookup lookup) {
sascha@450: this(lookup, null);
sascha@422: }
sascha@422:
ingo@815:
sascha@450: public PolygonRenderer(
sascha@778: PaintLookup lookup,
sascha@450: PolygonSeriesLabelGenerator labelGenerator
sascha@450: ) {
sascha@450: this.lookup = lookup;
sascha@450: this.labelGenerator = labelGenerator;
sascha@422: }
sascha@422:
ingo@795: /**
ingo@795: * This method draws polygons of each series in <code>dataset</code> into
ingo@795: * the given graphics object. If a polygon has no attribute 'fill', we
ingo@795: * expect that it is a line, otherwise the polygon is filled.
ingo@795: *
ingo@795: */
sascha@450: public void drawPolygons(
sascha@422: Graphics2D graphics,
sascha@451: PolygonPlot plot,
sascha@451: Rectangle2D area,
sascha@422: PolygonDataset dataset
sascha@422: ) {
sascha@422: int seriesCount = dataset.getSeriesCount();
sascha@422: for (int i = 0; i < seriesCount; i++) {
sascha@422: PolygonSeries series = dataset.getSeries(i);
sascha@422: Integer colorIdx = (Integer)series.getAttribute("fill");
sascha@422:
sascha@422: if (colorIdx != null) {
sascha@422: Paint paint = lookup.getPaint(colorIdx.intValue());
sascha@422: graphics.setPaint(paint != null ? paint : Color.black);
sascha@451: graphics.fill(constructShape(plot, area, series, true));
sascha@422: }
sascha@422: else {
sascha@447: Number lineWidth = (Number)series.getAttribute("line.width");
sascha@447: BasicStroke stroke = new BasicStroke(
sascha@447: lineWidth != null ? lineWidth.floatValue() : 1f);
sascha@447: graphics.setStroke(stroke);
sascha@422: graphics.setPaint(Color.black);
sascha@451: graphics.draw(constructShape(plot, area, series, false));
sascha@422: }
sascha@422: }
sascha@450: }
sascha@450:
ingo@795: /**
ingo@795: * Draw labels at each item of a series in the given dataset. If the series
ingo@795: * has no label attritue, no label is drawn.
sascha@803: *
ingo@795: */
sascha@450: public void drawLabels(
sascha@450: final Graphics2D graphics,
sascha@450: final PolygonPlot plot,
sascha@450: final Rectangle2D area,
sascha@450: PolygonDataset dataset
sascha@450: ) {
sascha@450: if (labelGenerator == null) {
sascha@450: return;
sascha@450: }
sascha@450:
sascha@450: final ArrayList<Rectangle2D> bboxes = new ArrayList<Rectangle2D>();
sascha@450:
sascha@450: Font font = graphics.getFont();
sascha@450: font = font.deriveFont(Font.PLAIN, Math.max(8, font.getSize()-3));
sascha@450: graphics.setFont(font);
sascha@450: FontMetrics metrics = graphics.getFontMetrics(font);
sascha@450:
sascha@450: for (int i = dataset.getSeriesCount()-1; i >= 0; --i) {
sascha@450: PolygonSeries series = dataset.getSeries(i);
sascha@450:
sascha@450: String label = labelGenerator.generateLabel(series);
sascha@450: if (label == null) {
sascha@450: continue;
sascha@450: }
sascha@450:
sascha@450: final Rectangle2D box = TextUtilities.getTextBounds(
sascha@450: label, graphics, metrics);
sascha@450:
sascha@450: for (int j = series.getItemCount()-1; j >= 0; --j) {
sascha@450: final CompactXYItems ring = series.getItem(j);
sascha@450: LevelOrderIndices loi = new LevelOrderIndices(ring.size()-1);
sascha@450: Rectangle2D r = (Rectangle2D)loi.visit(
sascha@778: new LevelOrderIndices.Visitor()
sascha@450: {
sascha@450: ValueAxis da = plot.getDomainAxis();
sascha@450: ValueAxis ra = plot.getRangeAxis();
sascha@450: RectangleEdge de = plot.getDomainAxisEdge();
sascha@450: RectangleEdge re = plot.getRangeAxisEdge();
sascha@450: Rectangle2D.Double r = new Rectangle2D.Double(
sascha@450: 0d, 0d, box.getWidth(), box.getHeight());
sascha@450:
sascha@450: public Object visit(int index) {
sascha@778: r.x = da.valueToJava2D(ring.getX(index), area, de)
sascha@450: - 0.5*box.getWidth();
sascha@450: r.y = ra.valueToJava2D(ring.getY(index), area, re)
sascha@450: + 0.5*box.getHeight();
sascha@450:
sascha@450: for (Rectangle2D b: bboxes) {
sascha@450: if (b.intersects(r)) {
sascha@450: return null;
sascha@450: }
sascha@450: }
sascha@450: return r;
sascha@450: }
sascha@450: });
sascha@450:
sascha@450: if (r != null) {
sascha@450: bboxes.add(r);
sascha@450: graphics.drawString(
sascha@450: label, (float)r.getX(), (float)r.getY());
sascha@450: }
sascha@450: } // for all items in series
sascha@450: } // for all series
sascha@422: }
sascha@422:
ingo@795: /**
ingo@795: * Creates a shape made up of the CompactXYItems object stored in the given
ingo@795: * series.
ingo@795: *
ingo@795: * @param plot The plot.
ingo@795: * @param area The boundary.
ingo@795: * @param series The series storing the items.
ingo@795: * @param close Specifies if the polygon should be closed or not.
ingo@815: * @return the constructed shape.
ingo@795: */
sascha@451: protected Shape constructShape(
sascha@451: PolygonPlot plot,
sascha@451: Rectangle2D area,
sascha@778: PolygonSeries series,
sascha@451: boolean close
sascha@451: ) {
sascha@451: ValueAxis da = plot.getDomainAxis();
sascha@451: ValueAxis ra = plot.getRangeAxis();
sascha@451: RectangleEdge de = plot.getDomainAxisEdge();
sascha@451: RectangleEdge re = plot.getRangeAxisEdge();
sascha@451:
sascha@422: CompactXYItems [] rings = series.getRings();
sascha@451: GeneralPath path = new GeneralPath();
sascha@451:
sascha@422: for (int i = 0; i < rings.length; ++i) {
sascha@451:
sascha@422: CompactXYItems ring = rings[i];
sascha@451:
sascha@422: double [] data = ring.getData();
sascha@451:
sascha@422: if (data.length >= 2) {
sascha@451: path.moveTo(
sascha@451: (float)da.valueToJava2D(data[0], area, de),
sascha@451: (float)ra.valueToJava2D(data[1], area, re));
sascha@422: }
sascha@422: for (int j = 2; j < data.length;) {
sascha@451: path.lineTo(
sascha@451: (float)da.valueToJava2D(data[j++], area, de),
sascha@451: (float)ra.valueToJava2D(data[j++], area, re));
sascha@422: }
sascha@437: if (close) {
sascha@437: path.closePath();
sascha@437: }
sascha@422: }
sascha@422: return path;
sascha@422: }
sascha@422:
ingo@795: /**
ingo@795: * Retrieves the bounding box of a dataset.
ingo@795: */
sascha@422: public Rectangle2D getBoundingBox(PolygonDataset dataset) {
sascha@422: Rectangle2D bbox = null;
sascha@422:
sascha@422: for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
sascha@422: Range domain = dataset.getSeries(i).getDomainBounds();
sascha@422: Range range = dataset.getSeries(i).getRangeBounds();
sascha@422:
sascha@422: double x = domain.getLowerBound();
sascha@422: double y = range.getLowerBound();
sascha@422: double w = Math.abs(domain.getUpperBound() - x);
sascha@422: double h = Math.abs(range.getUpperBound() - y);
sascha@422:
sascha@422: if (bbox == null) {
sascha@422: bbox = new Rectangle2D.Double(x, y, w, h);
sascha@422: }
sascha@422: else {
sascha@422: bbox.add(new Rectangle2D.Double(x, y, w, h));
sascha@422: }
sascha@422: }
sascha@422:
sascha@422: return bbox;
sascha@422: }
sascha@422:
ingo@795: /**
ingo@795: *
ingo@795: * @return the bounds of a series.
ingo@795: */
sascha@422: public Rectangle2D getBounds(PolygonSeries series) {
sascha@422:
sascha@422: Range domain = series.getDomainBounds();
sascha@422: Range range = series.getRangeBounds();
sascha@422:
sascha@422: return new Rectangle2D.Double(
sascha@422: domain.getLowerBound(), range.getLowerBound(),
sascha@422: domain.getUpperBound(), range.getUpperBound()
sascha@422: );
sascha@422: }
sascha@422: }
sascha@422: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :