made tiles configurable

src/main/java/de/srsoftware/web4rail/tiles/StretchableTile.java

@@ -3,6 +3,8 @@ package de.srsoftware.web4rail.tiles;
 import java.util.HashMap;
 import java.util.Map.Entry;
 
+import org.json.JSONObject;
+
 import de.srsoftware.tools.Tag;
 import de.srsoftware.web4rail.Window;
 import de.srsoftware.web4rail.tags.Form;
@@ -11,6 +13,19 @@ public abstract class StretchableTile extends Tile {
 	private static final String LENGTH = "length";
 	public int length = 1;
 	
+	@Override
+	public JSONObject config() {
+		JSONObject config = super.config();
+		if (length != 1) config.put(LENGTH, length);
+		return config;
+	}
+	
+	@Override
+	public void configure(JSONObject config) {
+		super.configure(config);
+		if (config.has(LENGTH)) setLength(config.getInt(LENGTH));
+	}
+	
 	public Tag propMenu() {
 		Window menu = new Window("tile-properties",t("Properties of {} @ ({},{})",getClass().getSimpleName(),x,y));
 		Form form = new Form();

src/main/java/de/srsoftware/web4rail/tiles/Tile.java

@@ -7,6 +7,7 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Scanner;
 
+import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -26,6 +27,12 @@ public abstract class Tile {
 		classes.add(getClass().getSimpleName());
 	}
 	
+	public JSONObject config() {
+		return new JSONObject();
+	}
+
+	public void configure(JSONObject config) {}
+	
 	public int height() {
 		return 1;
 	}