altoslib: Start with map empty

Don't load images from 0,0 for no good reason; wait until someone sets
a desired lat/lon

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

diff --git a/altoslib/AltosMap.java b/altoslib/AltosMap.java
index 762054a33f158fcefb0698a00091359b97c6e5bd..d39c330201a0d01446388f64f3ec623ed0ea871e 100644 (file)
--- a/altoslib/AltosMap.java
+++ b/altoslib/AltosMap.java
@@ -150,8 +150,10 @@ public class AltosMap implements AltosMapTileListener, AltosMapStoreListener {
        }
 
        public void set_transform() {
-               transform = new AltosMapTransform(width(), height(), zoom, centre);
-               repaint();
+               if (centre != null) {
+                       transform = new AltosMapTransform(width(), height(), zoom, centre);
+                       repaint();
+               }
        }
 
        private void set_zoom_label() {
@@ -285,6 +287,7 @@ public class AltosMap implements AltosMapTileListener, AltosMapStoreListener {
                        tiles.remove(point);
 
                cache.set_cache_size((width() / AltosMap.px_size + 2) * (height() / AltosMap.px_size + 2));
+
                for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
                        for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
                                AltosPointInt point = new AltosPointInt(x, y);
@@ -319,7 +322,8 @@ public class AltosMap implements AltosMapTileListener, AltosMapStoreListener {
        }
 
        public void paint() {
-               make_tiles();
+               if (centre != null)
+                       make_tiles();
 
                for (AltosMapTile tile : tiles.values())
                        tile.paint(transform);
@@ -411,6 +415,5 @@ public class AltosMap implements AltosMapTileListener, AltosMapStoreListener {
                line = map_interface.new_line();
                path = map_interface.new_path();
                set_zoom_label();
-               centre(0, 0);
        }
 }