--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java	Mon Dec 21 16:47:45 2009 +0000
@@ -0,0 +1,129 @@
+package de.intevation.gnv.jfreechart;
+
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.Paint;
+import java.awt.Shape;
+import java.awt.geom.GeneralPath;
+import java.awt.geom.Rectangle2D;
+import java.awt.geom.Rectangle2D.Double;
+
+import org.jfree.data.Range;
+
+/**
+ * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
+ */
+public class PolygonRenderer
+{
+    public static final int AREA           = 1;
+    public static final int LINES          = 2;
+    public static final int AREA_AND_LINES = AREA | LINES;
+
+    public interface PaintLookup {
+
+        Paint getPaint(int index);
+
+    } // interface PaintLookup
+
+    protected int type;
+
+    protected PaintLookup lookup;
+
+    protected PolygonPlot plot;
+
+
+    public PolygonRenderer(PaintLookup lookup) {
+        this(lookup, AREA);
+    }
+
+    public PolygonRenderer(PaintLookup lookup, int type) {
+        this.lookup = lookup;
+        this.type   = type;
+    }
+
+    public void draw(
+        Graphics2D     graphics,
+        Rectangle2D    rectangle,
+        PolygonDataset dataset
+    ) {
+        Rectangle2D bbox = getBoundingBox(dataset);
+
+        double sx = (double)rectangle.getWidth()/bbox.getWidth();
+        double sy = (double)rectangle.getHeight()/bbox.getHeight();
+        double tx = rectangle.getMinX();
+        double ty = rectangle.getMinY();
+
+        graphics.translate(tx, ty);
+        graphics.scale(sx, sy);
+
+        int seriesCount = dataset.getSeriesCount();
+        for (int i = 0; i < seriesCount; i++) {
+            PolygonSeries series   = dataset.getSeries(i);
+            Integer       colorIdx = (Integer)series.getAttribute("fill");
+
+            if (colorIdx != null) {
+                Paint paint = lookup.getPaint(colorIdx.intValue());
+                graphics.setPaint(paint != null ? paint : Color.black);
+                graphics.fill(constructShape(series));
+            }
+            else {
+                graphics.setPaint(Color.black);
+                graphics.draw(constructShape(series));
+            }
+        }
+    }
+
+    protected Shape constructShape(PolygonSeries series) {
+        CompactXYItems [] rings = series.getRings();
+        GeneralPath path = new GeneralPath();
+        for (int i = 0; i < rings.length; ++i) {
+            CompactXYItems ring = rings[i];
+            double [] data = ring.getData();
+            if (data.length >= 2) {
+                path.moveTo((float)data[0], (float)data[1]);
+            }
+            for (int j = 2; j < data.length;) {
+                float x = (float)data[j++];
+                float y = (float)data[j++];
+                path.lineTo(x, y);
+            }
+            path.closePath();
+        }
+        return path;
+    }
+
+    public Rectangle2D getBoundingBox(PolygonDataset dataset) {
+        Rectangle2D bbox = null;
+
+        for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
+            Range domain = dataset.getSeries(i).getDomainBounds();
+            Range range  = dataset.getSeries(i).getRangeBounds();
+
+            double x = domain.getLowerBound();
+            double y = range.getLowerBound();
+            double w = Math.abs(domain.getUpperBound() - x);
+            double h = Math.abs(range.getUpperBound() - y);
+
+            if (bbox == null) {
+                bbox = new Rectangle2D.Double(x, y, w, h);
+            }
+            else {
+                bbox.add(new Rectangle2D.Double(x, y, w, h));
+            }
+        }
+
+        return bbox;
+    }
+
+    public Rectangle2D getBounds(PolygonSeries series) {
+
+        Range domain = series.getDomainBounds();
+        Range range  = series.getRangeBounds();
+
+        return new Rectangle2D.Double(
+            domain.getLowerBound(), range.getLowerBound(),
+            domain.getUpperBound(), range.getUpperBound()
+        );
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :