--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/project_files/Android-build/SDL-android-project/src/org/hedgewars/hedgeroid/util/ObservableTreeMapAdapter.java	Sat Aug 18 00:47:51 2012 +0200
@@ -0,0 +1,75 @@
+package org.hedgewars.hedgeroid.util;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import android.database.DataSetObserver;
+import android.widget.BaseAdapter;
+
+public abstract class ObservableTreeMapAdapter<K,V> extends BaseAdapter {
+	private boolean sourceChanged = true;
+	private List<V> entries = new ArrayList<V>();
+	private ObservableTreeMap<K, V> source;
+	
+	private DataSetObserver observer = new DataSetObserver() {
+		@Override
+		public void onChanged() {
+			sourceChanged = true;
+			notifyDataSetChanged();
+		}
+		
+		@Override
+		public void onInvalidated() {
+			invalidate();
+		}
+	};
+	
+	abstract protected Comparator<V> getEntryOrder();
+	
+	protected List<V> getEntries() {
+		if(sourceChanged) {
+			entries.clear();
+			entries.addAll(source.getMap().values());
+			Collections.sort(entries, getEntryOrder());
+			sourceChanged = false;
+		}
+		return entries;
+	}
+	
+	public int getCount() {
+		return getEntries().size();
+	}
+
+	public V getItem(int position) {
+		return getEntries().get(position);
+	}
+	
+	public long getItemId(int position) {
+		return position;
+	}
+	
+	@Override
+	public boolean hasStableIds() {
+		return false;
+	}
+	
+	public void setSource(ObservableTreeMap<K,V> source) {
+		if(this.source != null) {
+			this.source.unregisterObserver(observer);
+		}
+		this.source = source;
+		this.source.registerObserver(observer);
+		sourceChanged = true;
+		notifyDataSetChanged();
+	}
+	
+	public void invalidate() {
+		if(source != null) {
+			source.unregisterObserver(observer);
+		}
+		source = null;
+		notifyDataSetInvalidated();
+	}
+}
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