# HG changeset patch
# User Felix Wolfsteller <felix.wolfsteller@intevation.de>
# Date 1327065637 0
# Node ID c4ceade9d50e00c89f45b65246e532a5667683cb
# Parent  4e0878695c5f1e9dccb0c699aaa9ada1bc704aea
Added new Annotation class that prevents collisions (to replace StickyAxisAnnotation).

flys-artifacts/trunk@3742 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r 4e0878695c5f -r c4ceade9d50e flys-artifacts/ChangeLog
--- a/flys-artifacts/ChangeLog	Fri Jan 20 10:23:27 2012 +0000
+++ b/flys-artifacts/ChangeLog	Fri Jan 20 13:20:37 2012 +0000
@@ -1,3 +1,8 @@
+2012-01-20  Felix Wolfsteller	<felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java:
+	  New. Candidate to replace StickyAxisAnnotation eventually.
+
 2012-01-20  Felix Wolfsteller	<felix.wolfsteller@intevation.de>
 
 	* src/main/java/de/intevation/flys/exports/StyledSeriesBuilder.java:
diff -r 4e0878695c5f -r c4ceade9d50e flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java	Fri Jan 20 13:20:37 2012 +0000
@@ -0,0 +1,142 @@
+package de.intevation.flys.jfree;
+
+import org.apache.log4j.Logger;
+
+import java.util.Iterator;
+
+import java.awt.Shape;
+import java.awt.geom.Rectangle2D;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.BasicStroke;
+
+import org.jfree.chart.annotations.XYTextAnnotation;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.PlotOrientation;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.entity.XYAnnotationEntity;
+import org.jfree.chart.plot.PlotRenderingInfo;
+import org.jfree.chart.plot.Plot;
+
+import org.jfree.text.TextUtilities;
+
+import org.jfree.ui.RectangleEdge;
+
+import de.intevation.flys.utils.ThemeAccess;
+
+/**
+ * Custom Annotations class that is drawn only if no collisions with other
+ * already drawn CustomAnnotations in current plot are found.
+ */
+public class CollisionFreeXYTextAnnotation extends XYTextAnnotation {
+
+    /** Logger for this class. */
+    private static Logger logger =
+        Logger.getLogger(CollisionFreeXYTextAnnotation.class);
+
+    public CollisionFreeXYTextAnnotation(String text, float x, double y) {
+        super(text, x, y);
+    }
+
+
+    /**
+     * Draw the Annotation only if it does not collide with other
+     * already drawn Annotations- texts.
+     *
+     * @param g2            the graphics device.
+     * @param plot          the plot.
+     * @param dataArea      the data area.
+     * @param domainAxis    the domain axis.
+     * @param rangeAxis     the range axis.
+     * @param rendererIndex the render index.
+     * @param info          state information, escpecially collects info about
+     *                      already drawn shapes (and thus annotations), used
+     *                      for collision detection.
+     */
+    @Override
+    public void draw(
+        java.awt.Graphics2D g2,
+        XYPlot plot,
+        java.awt.geom.Rectangle2D dataArea,
+        ValueAxis domainAxis,
+        ValueAxis rangeAxis,
+        int rendererIndex,
+        PlotRenderingInfo info
+    ) {
+        // From superclass, adjusted access only.
+        PlotOrientation orientation = plot.getOrientation();
+        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
+                plot.getDomainAxisLocation(), orientation);
+        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
+                plot.getRangeAxisLocation(), orientation);
+
+        float anchorX = (float) domainAxis.valueToJava2D(
+                this.getX(), dataArea, domainEdge);
+        float anchorY = (float) rangeAxis.valueToJava2D(
+                this.getY(), dataArea, rangeEdge);
+
+        if (orientation == PlotOrientation.HORIZONTAL) {
+            float tempAnchor = anchorX;
+            anchorX = anchorY;
+            anchorY = tempAnchor;
+        }
+
+        g2.setFont(getFont());
+        Shape hotspot = TextUtilities.calculateRotatedStringBounds(
+                getText(), g2, anchorX, anchorY, getTextAnchor(),
+                getRotationAngle(), getRotationAnchor());
+
+        // Deviation from superclass: prevent collision.
+        Rectangle2D hotspotBox = hotspot.getBounds2D();
+        for (Iterator i = info.getOwner().getEntityCollection().iterator();
+                i.hasNext(); ) {
+            Object next = i.next();
+            // Collision with other stuff than XYAnnotations are okay.
+            if (next instanceof XYAnnotationEntity) {
+                XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
+                if (drawnShape.getArea().intersects(hotspotBox)) {
+                    // Found collision, early stop.
+                    return;
+                }
+            }
+        }
+
+        if (this.getBackgroundPaint() != null) {
+            g2.setPaint(this.getBackgroundPaint());
+            g2.fill(hotspot);
+        }
+        g2.setPaint(getPaint());
+        TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
+                getTextAnchor(), getRotationAngle(), getRotationAnchor());
+        if (this.isOutlineVisible()) {
+            g2.setStroke(this.getOutlineStroke());
+            g2.setPaint(this.getOutlinePaint());
+            g2.draw(hotspot);
+        }
+
+        String toolTip = getToolTipText();
+        String url = getURL();
+        if (toolTip != null || url != null) {
+            addEntity(info, hotspot, rendererIndex, toolTip, url);
+        }
+        else {
+            addEntity(info, hotspot, rendererIndex,
+                "CollisionFreeXYTextAnnotation",
+                "CollisionFreeXYTextAnnotation");
+        }
+    }
+
+
+    /*
+    public void applyTheme(ThemeAccess ta) {
+        lineWidth       = ta.parseLineWidth();
+        lineColor       = ta.parseLineColorField();
+        textColor       = ta.parseTextColor();
+        font            = ta.parseTextFont();
+        textOrientation = ta.parseTextOrientation();
+        textBackground  = ta.parseTextBackground();
+        showBackground  = ta.parseShowTextBackground();
+    }
+    */
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :