altoslib: Create display-independent map support code

[fw/altos] / altoslib / AltosMapPath.java

diff --git a/altoslib/AltosMapPath.java b/altoslib/AltosMapPath.java
new file mode 100644 (file)
index 0000000..272a431
--- /dev/null
+++ b/altoslib/AltosMapPath.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright © 2014 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_6;
+
+import java.io.*;
+import java.lang.Math;
+import java.util.*;
+import java.util.concurrent.*;
+
+class PathPoint {
+       AltosLatLon     lat_lon;
+       int             state;
+
+       public PathPoint(AltosLatLon lat_lon, int state) {
+               this.lat_lon = lat_lon;
+               this.state = state;
+       }
+
+       public boolean equals(PathPoint other) {
+               if (other == null)
+                       return false;
+
+               return lat_lon.equals(other.lat_lon) && state == other.state;
+       }
+}
+
+public abstract class AltosMapPath {
+
+       LinkedList<PathPoint>   points = new LinkedList<PathPoint>();
+       PathPoint               last_point = null;
+
+       static public int stroke_width = 6;
+
+       public abstract void paint(AltosMapTransform t);
+
+       public AltosMapRectangle add(double lat, double lon, int state) {
+               PathPoint               point = new PathPoint(new AltosLatLon (lat, lon), state);
+               AltosMapRectangle       rect = null;
+
+               if (!point.equals(last_point)) {
+                       if (last_point != null)
+                               rect = new AltosMapRectangle(last_point.lat_lon, point.lat_lon);
+                       points.add (point);
+                       last_point = point;
+               }
+               return rect;
+       }
+
+       public void clear () {
+               points = new LinkedList<PathPoint>();
+       }
+}