Moved source into separate src directory due to popular request

[GpsPrune.git] / src / tim / prune / gui / colour / AltitudeColourer.java

diff --git a/src/tim/prune/gui/colour/AltitudeColourer.java b/src/tim/prune/gui/colour/AltitudeColourer.java
new file mode 100644 (file)
index 0000000..5ab79db
--- /dev/null
+++ b/src/tim/prune/gui/colour/AltitudeColourer.java
@@ -0,0 +1,70 @@
+package tim.prune.gui.colour;
+
+import java.awt.Color;
+
+import tim.prune.data.DataPoint;
+import tim.prune.data.Track;
+import tim.prune.data.TrackInfo;
+
+/**
+ * Colourer based on altitude values
+ */
+public class AltitudeColourer extends ContinuousPointColourer
+{
+       /**
+        * Constructor
+        * @param inStartColour start colour
+        * @param inEndColour end colour
+        */
+       public AltitudeColourer(Color inStartColour, Color inEndColour)
+       {
+               super(inStartColour, inEndColour);
+       }
+
+       @Override
+       public void calculateColours(TrackInfo inTrackInfo)
+       {
+               Track track = inTrackInfo == null ? null : inTrackInfo.getTrack();
+               final int numPoints = track == null ? 0 : track.getNumPoints();
+               DataPoint point = null;
+
+               // Figure out altitude range
+               double minAltitude = 0.0;
+               double maxAltitude = 0.0;
+               boolean altFound = false;
+               for (int i=0; i<numPoints; i++)
+               {
+                       point = track.getPoint(i);
+                       if (point != null && point.hasAltitude())
+                       {
+                               double altValue = point.getAltitude().getMetricValue();
+                               if (altValue < minAltitude || !altFound) {minAltitude = altValue;}
+                               if (altValue > maxAltitude || !altFound) {maxAltitude = altValue;}
+                               altFound = true;
+                       }
+               }
+
+               if ((maxAltitude - minAltitude) < 1.0)
+               {
+                       // not enough altitude range, set all to null
+                       init(0);
+               }
+               else
+               {
+                       // initialise the array to the right size
+                       init(numPoints);
+                       // loop over track points to calculate colours
+                       for (int i=0; i<numPoints; i++)
+                       {
+                               point = track.getPoint(i);
+                               if (point != null && point.hasAltitude() && !point.isWaypoint())
+                               {
+                                       double altValue = point.getAltitude().getMetricValue();
+                                       double fraction = (altValue - minAltitude) / (maxAltitude - minAltitude);
+                                       setColour(i, mixColour((float) fraction));
+                               }
+                               else setColour(i, null);
+                       }
+               }
+       }
+}