altoslib: Create display-independent map support code

This takes the swing-specific map code and creates a generic version.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/altoslib/AltosMapLine.java b/altoslib/AltosMapLine.java
new file mode 100644
index 00000000..83de47f9
--- /dev/null
+++ b/altoslib/AltosMapLine.java
@@ -0,0 +1,83 @@
+/*
+ * 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.*;
+
+public abstract class AltosMapLine implements AltosFontListener {
+	AltosLatLon	start, end;
+
+	static public int stroke_width = 6;
+
+	public abstract void font_size_changed(int font_size);
+
+	private AltosLatLon lat_lon(AltosPointDouble pt, AltosMapTransform t) {
+		return t.screen_lat_lon(pt);
+	}
+
+	public void dragged(AltosPointDouble pt, AltosMapTransform t) {
+		end = lat_lon(pt, t);
+	}
+
+	public void pressed(AltosPointDouble pt, AltosMapTransform t) {
+		start = lat_lon(pt, t);
+		end = null;
+	}
+
+	private String line_dist() {
+		String	format;
+		AltosGreatCircle	g = new AltosGreatCircle(start.lat, start.lon,
+								 end.lat, end.lon);
+		double	distance = g.distance;
+
+		if (AltosConvert.imperial_units) {
+			distance = AltosConvert.meters_to_feet(distance);
+			if (distance < 10000) {
+				format = "%4.0fft";
+			} else {
+				distance /= 5280;
+				if (distance < 10)
+					format = "%5.3fmi";
+				else if (distance < 100)
+					format = "%5.2fmi";
+				else if (distance < 1000)
+					format = "%5.1fmi";
+				else
+					format = "%5.0fmi";
+			}
+		} else {
+			if (distance < 10000) {
+				format = "%4.0fm";
+			} else {
+				distance /= 1000;
+				if (distance < 100)
+					format = "%5.2fkm";
+				else if (distance < 1000)
+					format = "%5.1fkm";
+				else
+					format = "%5.0fkm";
+			}
+		}
+		return String.format(format, distance);
+	}
+
+	public abstract void paint(AltosMapTransform t);
+}