Kore/app/src/main/java/org/xbmc/kore/ui/FileListFragment.java

/*
 * Copyright 2015 DanhDroid. All rights reserved.
 *
 * 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 org.xbmc.kore.ui;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.astuetz.PagerSlidingTabStrip;
import org.xbmc.kore.R;
import org.xbmc.kore.jsonrpc.method.Files;
import org.xbmc.kore.utils.TabsAdapter;

import butterknife.ButterKnife;
import butterknife.InjectView;

/**
 * Created by danhdroid on 3/18/15.
 */
public class FileListFragment extends Fragment
        implements FileActivity.OnBackPressedListener {

    @InjectView(R.id.pager_tab_strip) PagerSlidingTabStrip pagerTabStrip;
    @InjectView(R.id.pager) ViewPager viewPager;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_media_list, container, false);
        ButterKnife.inject(this, root);

        Bundle videoFileListArgs = new Bundle();
        videoFileListArgs.putString(MediaFileListFragment.MEDIA_TYPE, Files.Media.VIDEO);
        Bundle musicFileListArgs = new Bundle();
        musicFileListArgs.putString(MediaFileListFragment.MEDIA_TYPE, Files.Media.MUSIC);
        Bundle pictureFileListArgs = new Bundle();
        pictureFileListArgs.putString(MediaFileListFragment.MEDIA_TYPE, Files.Media.PICTURES);
        TabsAdapter tabsAdapter = new TabsAdapter(getActivity(), getChildFragmentManager())
                .addTab(MediaFileListFragment.class, videoFileListArgs, R.string.video, 1)
                .addTab(MediaFileListFragment.class, musicFileListArgs, R.string.music, 2)
                .addTab(MediaFileListFragment.class, pictureFileListArgs, R.string.pictures, 3);
        viewPager.setAdapter(tabsAdapter);
        pagerTabStrip.setViewPager(viewPager);
        return root;
    }

    @Override
    public void onActivityCreated (Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        setHasOptionsMenu(false);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            FileActivity listenerActivity = (FileActivity) activity;
            listenerActivity.setBackPressedListener(this);
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " unable to register BackPressedListener");
        }
    }

    MediaFileListFragment findFragmentByPosition(int position) {
        String tag = "android:switcher:" + viewPager.getId() + ":" + position;
        return (MediaFileListFragment) getChildFragmentManager().findFragmentByTag(tag);
    }

    @Override
    public void onBackPressed() {
        // tell current fragment to move up one directory

        MediaFileListFragment curPage = findFragmentByPosition(viewPager.getCurrentItem() + 1);
        if (curPage != null) {
            // based on the current position cast the page to the correct
            // class and call the method
            curPage.onBackPressed();
        }
    }

    @Override
    public boolean currentPageAtRootDirectory() {
        MediaFileListFragment curPage = findFragmentByPosition(viewPager.getCurrentItem() + 1);
        if (curPage != null) {
            return curPage.atRootDirectory();
        }
        return true;
    }
}