altoslib: Get new abstract mapping code compiling

Not useful yet, but at least it compiles now?

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

1 files changed, 3 insertions, 1 deletions

diff --git a/altoslib/AltosMapTile.java b/altoslib/AltosMapTile.java
index b5dee7a4..923b7c6b 100644
--- a/altoslib/AltosMapTile.java
+++ b/altoslib/AltosMapTile.java
@@ -20,7 +20,7 @@ package org.altusmetrum.altoslib_6;
 import java.io.*;
 import java.util.*;
 
-public class AltosMapTile implements AltosFontListener {
+public abstract class AltosMapTile implements AltosFontListener {
 	AltosMapTileListener	listener;
 	AltosLatLon	upper_left, center;
 	int		px_size;
@@ -94,6 +94,8 @@ public class AltosMapTile implements AltosFontListener {
 		store.remove_listener(listener);
 	}
 
+	public abstract void paint(AltosMapTransform t);
+
 	public AltosMapTile(AltosMapTileListener listener, AltosLatLon upper_left, AltosLatLon center, int zoom, int maptype, int px_size) {
 		this.listener = listener;
 		this.upper_left = upper_left;