altoslib: Add units converters for latitude and longitude

[fw/altos] / altoslib / AltosLocation.java

diff --git a/altoslib/AltosLocation.java b/altoslib/AltosLocation.java
new file mode 100644 (file)
index 0000000..725a02b
--- /dev/null
+++ b/altoslib/AltosLocation.java
@@ -0,0 +1,66 @@
+/*
+ * 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_4;
+
+public abstract class AltosLocation extends AltosUnits {
+
+       public abstract String pos();
+       public abstract String neg();
+
+       public double value(double v, boolean imperial_units) {
+               return v;
+       }
+
+       public double inverse(double v, boolean imperial_units) {
+               return v;
+       }
+
+       public String show_units(boolean imperial_units) {
+               return "°";
+       }
+
+       public String say_units(boolean imperial_units) {
+               return "degrees";
+       }
+
+       public int show_fraction(int width, boolean imperial_units) {
+               return 2;
+       }
+
+       public String show(int width, double v, boolean imperial_units) {
+               String  h = pos();
+               if (v < 0) {
+                       h = neg();
+                       v = -v;
+               }
+               int deg = (int) Math.floor(v);
+               double min = (v - Math.floor(v)) * 60.0;
+               return String.format("%s %4d° %9.6f", h, deg, min);
+       }
+
+       public String say(double v, boolean imperial_units) {
+               String  h = pos();
+               if (v < 0) {
+                       h = neg();
+                       v = -v;
+               }
+               int deg = (int) Math.floor(v);
+               double min = (v - Math.floor(v)) * 60.0;
+               return String.format("%s %d degrees %d", h, deg, (int) Math.floor(min + 0.5));
+       }
+}