1 files changed, 116 insertions, 0 deletions
diff --git a/altosuilib/AltosUIMapLine.java b/altosuilib/AltosUIMapLine.java
new file mode 100644
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+++ b/altosuilib/AltosUIMapLine.java
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+/*
+ * 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.altosuilib_2;
+
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+import java.io.*;
+import java.lang.Math;
+import java.awt.geom.*;
+import java.util.*;
+import java.util.concurrent.*;
+import org.altusmetrum.altoslib_4.*;
+
+public class AltosUIMapLine {
+	AltosUILatLon	start, end;
+
+	private Font	font = null;
+
+	public void set_font(Font font) {
+		this.font = font;
+	}
+
+	private AltosUILatLon lat_lon(MouseEvent e, AltosUIMapTransform t) {
+		return t.screen_lat_lon(e.getPoint());
+	}
+
+	public void dragged(MouseEvent e, AltosUIMapTransform t) {
+		end = lat_lon(e, t);
+	}
+
+	public void pressed(MouseEvent e, AltosUIMapTransform t) {
+		start = lat_lon(e, 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 void paint(Graphics2D g, AltosUIMapTransform t) {
+		g.setColor(Color.BLUE);
+
+		if (start == null || end == null)
+			return;
+
+		Line2D.Double line = new Line2D.Double(t.screen(start),
+						       t.screen(end));
+
+		g.draw(line);
+
+		String	message = line_dist();
+		g.setFont(font);
+		g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+		Rectangle2D	bounds;
+		bounds = font.getStringBounds(message, g.getFontRenderContext());
+
+		float x = (float) line.x1;
+		float y = (float) line.y1 + (float) bounds.getHeight() / 2.0f;
+
+		if (line.x1 < line.x2) {
+			x -= (float) bounds.getWidth() + 2.0f;
+		} else {
+			x += 2.0f;
+		}
+		g.drawString(message, x, y);
+	}
+}