+
−/*
+
− * Hedgewars for Android. An Android port of Hedgewars, a free turn based strategy game
+
− * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>
+
− *
+
− * This program is free software; you can redistribute it and/or
+
− * modify it under the terms of the GNU General Public License
+
− * as published by the Free Software Foundation; either version 2
+
− * of the License, or (at your option) any later version.
+
− *
+
− * This program is distributed in the hope that it will be useful,
+
− * but WITHOUT ANY WARRANTY; without even the implied warranty of
+
− * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+
− * GNU General Public License for more details.
+
− *
+
− * You should have received a copy of the GNU General Public License
+
− * along with this program; if not, write to the Free Software
+
− * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
− */
+
−
+
−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();
+
−    }
+
−}