ru.ming13.gambit.adapter.CardsPagerAdapter.java Source code

Introduction

Here is the source code for ru.ming13.gambit.adapter.CardsPagerAdapter.java

Source

/*
 * Copyright 2012 Artur Dryomov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ru.ming13.gambit.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.Collections;
import java.util.List;

import butterknife.ButterKnife;
import butterknife.InjectView;
import butterknife.OnClick;
import ru.ming13.gambit.R;
import ru.ming13.gambit.model.Card;

public class CardsPagerAdapter extends PagerAdapter {
    static final class CardViewHolder {
        @InjectView(R.id.text)
        public TextView cardText;

        public Card card;
        public CardSide cardSide;

        public CardViewHolder(View cardView, Card card, CardSide cardSide) {
            this.card = card;
            this.cardSide = cardSide;

            ButterKnife.inject(this, cardView);
        }

        @OnClick(R.id.container_card)
        public void setUpCardSide() {
            this.cardSide = cardSide.flip();

            if (cardSide == CardSide.FRONT) {
                cardText.setText(card.getFrontSideText());
            } else {
                cardText.setText(card.getBackSideText());
            }
        }
    }

    private static enum CardSide {
        FRONT, BACK;

        public CardSide flip() {
            if (this == FRONT) {
                return BACK;
            } else {
                return FRONT;
            }
        }
    }

    private final LayoutInflater layoutInflater;

    private CardSide defaultCardSide;

    private List<Card> cards;

    public CardsPagerAdapter(@NonNull Context context) {
        this.layoutInflater = LayoutInflater.from(context);

        this.defaultCardSide = CardSide.FRONT;

        this.cards = Collections.emptyList();
    }

    public void refill(@NonNull List<Card> cards) {
        this.cards = cards;

        notifyDataSetChanged();
    }

    public void switchDefaultCardSide() {
        this.defaultCardSide = defaultCardSide.flip();
    }

    @Override
    public Object instantiateItem(ViewGroup cardsPagerContainer, int cardPosition) {
        ViewPager cardsPager = getCardsPager(cardsPagerContainer);

        View cardView = newCardView(cardsPager, cardPosition);
        bindCardView(cardView);

        cardsPager.addView(cardView);

        return cardView;
    }

    private ViewPager getCardsPager(ViewGroup cardsPagerContainer) {
        return (ViewPager) cardsPagerContainer;
    }

    private View newCardView(ViewPager cardsPager, int cardPosition) {
        View cardView = layoutInflater.inflate(R.layout.view_card_pager, cardsPager, false);

        cardView.setTag(new CardViewHolder(cardView, cards.get(cardPosition), defaultCardSide));

        return cardView;
    }

    private void bindCardView(View cardView) {
        CardViewHolder cardViewHolder = (CardViewHolder) cardView.getTag();

        if (cardViewHolder.cardSide == CardSide.FRONT) {
            cardViewHolder.cardText.setText(cardViewHolder.card.getFrontSideText());
        } else {
            cardViewHolder.cardText.setText(cardViewHolder.card.getBackSideText());
        }
    }

    @Override
    public void destroyItem(ViewGroup cardsPagerContainer, int cardPosition, Object cardViewObject) {
        getCardsPager(cardsPagerContainer).removeView((View) cardViewObject);
    }

    @Override
    public boolean isViewFromObject(View cardView, Object cardViewObject) {
        return cardView.equals(cardViewObject);
    }

    @Override
    public int getItemPosition(Object object) {
        return PagerAdapter.POSITION_NONE;
    }

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

    public boolean isEmpty() {
        return cards.isEmpty();
    }
}