net.pejici.easydice.pageradapter.DieHandListAdapter.java Source code

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Here is the source code for net.pejici.easydice.pageradapter.DieHandListAdapter.java

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/*
 * Easy Dice - An application for rolling dice of your choosing.
 * Copyright (C) 2011-2014 Slobodan Pejic (slobo@pejici.net)
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package net.pejici.easydice.pageradapter;

import java.util.ArrayList;
import java.util.List;
import java.util.Observable;
import java.util.Observer;

import net.pejici.easydice.model.DieHand;
import net.pejici.easydice.model.DieHandList;
import net.pejici.easydice.view.DiceRollerView;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

public class DieHandListAdapter extends PagerAdapter implements Observer {
    DieHandList list = null;
    List<DiceRollerView> queue = new ArrayList<DiceRollerView>();
    Context ctx;

    static class DieViewModelPair {
        final DiceRollerView view;
        final DieHand model;

        DieViewModelPair(DiceRollerView view, DieHand model) {
            this.view = view;
            this.model = model;
        }
    }

    public DieHandListAdapter(Context ctx, DieHandList list) {
        super();
        this.ctx = ctx;
        this.list = list;
        this.list.addObserver(this);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return String.valueOf(position);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        DiceRollerView view;
        if (queue.size() > 0) {
            view = queue.remove(0);
        } else {
            view = DiceRollerView.instantiate(ctx);
        }
        DieHand h = list.get(position);
        view.setHand(h);
        container.addView(view);
        return new DieViewModelPair(view, h);
    }

    @Override
    public int getCount() {
        int size = list.size();
        return size;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        DieViewModelPair p = (DieViewModelPair) object;
        p.view.setHand(null);
        queue.add(p.view);
        container.removeView(p.view);
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        DieViewModelPair p = (DieViewModelPair) object;
        return (view == p.view);
    }

    @Override
    public int getItemPosition(Object object) {
        DieViewModelPair p = (DieViewModelPair) object;
        if (queue.contains(object)) {
            return POSITION_NONE;
        }
        int position = list.indexOfIdentical(p.model);
        if (position < 0) {
            return POSITION_NONE;
        }
        return position;
    }

    @Override
    public void update(Observable observable, Object data) {
        this.notifyDataSetChanged();
    }

}