altosuilib: Make map cache size configurable

Systems with sufficient memory can get smoother map scrolling by
making the cache larger. Would be nice to do this automatically?

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

1 files changed, 1 insertions, 1 deletions

diff --git a/altosuilib/AltosUIMapView.java b/altosuilib/AltosUIMapView.java
index 1abd1731..34a85f52 100644
--- a/altosuilib/AltosUIMapView.java
+++ b/altosuilib/AltosUIMapView.java
@@ -370,7 +370,7 @@ public class AltosUIMapView extends Component implements MouseMotionListener, Mo
 		for (Point point : to_remove)
 			tiles.remove(point);
 
-		cache.set_cache_size(((lower_right.y - upper_left.y) / px_size + 1) * ((lower_right.x - upper_left.x) / px_size + 1));
+		cache.set_cache_size((getWidth() / px_size + 2) * (getHeight() / px_size + 2));
 		for (int y = upper_left.y; y <= lower_right.y; y += px_size) {
 			for (int x = upper_left.x; x <= lower_right.x; x += px_size) {
 				Point point = new Point(x, y);