--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/jfree/DoubleBounds.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,85 @@
+package org.dive4elements.river.jfree;
+
+
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.axis.LogarithmicAxis;
+import org.jfree.data.Range;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DoubleBounds implements Bounds {
+
+    protected double lower;
+    protected double upper;
+
+
+    /**
+     * Default constructor. <b>A DoubleBounds has always set lower &lt;
+     * upper!</b>
+     */
+    public DoubleBounds(double lower, double upper) {
+        this.lower = Math.min(lower, upper);
+        this.upper = Math.max(lower, upper);
+    }
+
+
+    @Override
+    public Number getLower() {
+        return Double.valueOf(lower);
+    }
+
+
+    @Override
+    public Number getUpper() {
+        return Double.valueOf(upper);
+    }
+
+
+    @Override
+    public void applyBounds(ValueAxis axis) {
+        axis.setRange(new Range(lower, upper));
+    }
+
+
+    /**
+     * Set extended range to ValueAxis.
+     * @param percent how many percent to extend (in each direction,
+     *        thus 10 percent on [0,100] -> [-10,110].
+     */
+    @Override
+    public void applyBounds(ValueAxis axis, int percent) {
+        double space = (upper - lower) / 100 * percent;
+        if (axis instanceof LogarithmicAxis) {
+            axis.setRange(new Range(Math.max(lower-space, 0.0001),
+                        Math.max(upper+space, 0.0002)));
+        } else {
+            axis.setRange(new Range(lower-space, upper+space));
+        }
+    }
+
+
+    @Override
+    public Bounds combine(Bounds bounds) {
+        if (bounds == null) {
+            return this;
+        }
+
+        DoubleBounds other = (DoubleBounds) bounds;
+
+        double otherLower = other.getLower().doubleValue();
+        double otherUpper = other.getUpper().doubleValue();
+
+        return new DoubleBounds(
+            otherLower < lower ? otherLower : lower,
+            otherUpper > upper ? otherUpper : upper);
+    }
+
+
+    @Override
+    public String toString() {
+        return "DoubleBounds=[" + lower + " ; " + upper + "]";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :