Terrain-profile adapter

src/gov/nasa/worldwind/util/measure/TerrainProfileAdapter.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2012 United States Government as represented by the Administrator of the
+ * National Aeronautics and Space Administration.
+ * All Rights Reserved.
+ */
+package gov.nasa.worldwind.util.measure;
+
+import gov.nasa.worldwind.WorldWindow;
+import gov.nasa.worldwind.geom.LatLon;
+import gov.nasa.worldwind.layers.TerrainProfileLayer;
+import gov.nasa.worldwind.util.Logging;
+
+import java.beans.*;
+import java.util.ArrayList;
+
+/**
+ * Adapter that forwards control-point position changes from a {@link MeasureTool}
+ * to a {@link TerrainProfileLayer} so that the height-data along the measured
+ * path can be visualized.
+ * 
+ * @author Wiehann Matthysen
+ */
+public class TerrainProfileAdapter implements PropertyChangeListener
+{
+    protected WorldWindow wwd;
+    protected TerrainProfileLayer profileLayer;
+
+    /**
+     * Construct an adapter for the specified <code>WorldWindow</code> and <code>TerrainProfileLayer</code>.
+     *
+     * @param wwd the <code>WorldWindow</code> the specified layer is associated with.
+     * @param layer the layer to forward control-point events to.
+     */
+    public TerrainProfileAdapter(WorldWindow wwd, TerrainProfileLayer layer)
+    {
+        if (wwd == null)
+        {
+            String msg = Logging.getMessage("nullValue.WorldWindow");
+            Logging.logger().severe(msg);
+            throw new IllegalArgumentException(msg);
+        }
+        if (layer == null)
+        {
+            String msg = Logging.getMessage("nullValue.LayerIsNull");
+            Logging.logger().severe(msg);
+            throw new IllegalArgumentException(msg);
+        }
+
+        this.wwd = wwd;
+        this.profileLayer = layer;
+    }
+
+    @Override
+    public void propertyChange(PropertyChangeEvent event)
+    {
+        MeasureTool measureTool = (MeasureTool)event.getSource();
+        // Measure shape position list changed - update terrain profile
+        if (event.getPropertyName().equals(MeasureTool.EVENT_POSITION_ADD)
+                || event.getPropertyName().equals(MeasureTool.EVENT_POSITION_REMOVE)
+                || event.getPropertyName().equals(MeasureTool.EVENT_POSITION_REPLACE))
+        {
+            ArrayList<? extends LatLon> positions = measureTool.getPositions();
+            if (positions != null && positions.size() > 1)
+            {
+                this.profileLayer.setPathPositions(positions);
+                this.profileLayer.setEnabled(true);
+            } else
+            {
+                this.profileLayer.setEnabled(false);
+            }
+            this.wwd.redraw();
+        }
+    }
+}