java: Refactor AltosFlightDisplay units and font update handling

Make AltosFlightDisplay explicitly implement AltosFontListener and
AltosUnitsListener interfaces to make everyone use the same API. Then,
actually go implement units listeners so that changing units updates
all of the active displays immediately

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

1 files changed, 5 insertions, 1 deletions

diff --git a/altosuilib/AltosSiteMap.java b/altosuilib/AltosSiteMap.java
index 7f0e1844..ed77beff 100644
--- a/altosuilib/AltosSiteMap.java
+++ b/altosuilib/AltosSiteMap.java
@@ -192,11 +192,15 @@ public class AltosSiteMap extends JComponent implements AltosFlightDisplay, Mous
 		// nothing
 	}
 
-	public void set_font() {
+	public void font_size_changed(int font_size) {
 		for (AltosSiteMapTile tile : mapTiles.values())
 			tile.set_font(AltosUILib.value_font);
 	}
 
+	public void units_changed(boolean imperial_units) {
+		set_line();
+	}
+
 	static final int load_mode_cached = 1;
 	static final int load_mode_uncached = 2;