altosuilib: Outline map lines and distance value with white

This makes the value and line visible on dark backgrounds

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

1 files changed, 16 insertions, 3 deletions

diff --git a/altosuilib/AltosUIMapLine.java b/altosuilib/AltosUIMapLine.java
index 86d2e6e2..32437d4e 100644
--- a/altosuilib/AltosUIMapLine.java
+++ b/altosuilib/AltosUIMapLine.java
@@ -31,6 +31,7 @@ public class AltosUIMapLine {
 	AltosUILatLon	start, end;
 
 	private Font	font = null;
+	static public int stroke_width = 6;
 
 	public void set_font(Font font) {
 		this.font = font;
@@ -87,19 +88,24 @@ public class AltosUIMapLine {
 	}
 
 	public void paint(Graphics2D g, AltosUIMapTransform t) {
-		g.setColor(Color.BLUE);
 
 		if (start == null || end == null)
 			return;
 
+		g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+
 		Line2D.Double line = new Line2D.Double(t.screen(start),
 						       t.screen(end));
 
+		g.setColor(Color.WHITE);
+		g.setStroke(new BasicStroke(stroke_width+4, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
+		g.draw(line);
+
+		g.setColor(Color.BLUE);
+		g.setStroke(new BasicStroke(stroke_width, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
 		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());
 
@@ -111,6 +117,13 @@ public class AltosUIMapLine {
 		} else {
 			x += 2.0f;
 		}
+
+		g.setFont(font);
+		g.setColor(Color.WHITE);
+		for (int dy = -2; dy <= 2; dy += 2)
+			for (int dx = -2; dx <= 2; dx += 2)
+				g.drawString(message, x + dx, y + dy);
+		g.setColor(Color.BLUE);
 		g.drawString(message, x, y);
 	}
 }