com.nbossard.packlist.gui.MainActivityFragment.java Source code

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Here is the source code for com.nbossard.packlist.gui.MainActivityFragment.java

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/*
 * PackList is an open-source packing-list for Android
 *
 * Copyright (c) 2016 Nicolas Bossard.
 *
 * 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 com.nbossard.packlist.gui;

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.ActionMode;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ListView;

import com.nbossard.packlist.PackListApp;
import com.nbossard.packlist.R;
import com.nbossard.packlist.model.Trip;
import com.nbossard.packlist.process.saving.ISavingModule;

import java.util.List;

/*
@startuml
class com.nbossard.packlist.gui.MainActivityFragment {
}
    
com.nbossard.packlist.gui.MainActivityFragment ..> com.nbossard.packlist.gui.IMainActivity
    
@enduml
 */

/**
 * A placeholder fragment containing a simple list view.
 */
public class MainActivityFragment extends Fragment {

    // ********************** CONSTANTS *********************************************************************

    /**
     * Log tag.
     */
    private static final String TAG = MainActivityFragment.class.getName();

    // *********************** FIELDS ***********************************************************************

    /**
     * The saving module to retrieve and update data (trips).
     */
    private ISavingModule mSavingModule;
    /**
     * The root view, will be used to findViewById.
     */
    private View mRootView;
    /**
     * The trip list view.
     */
    private ListView mTripListView;
    /**
     * The object to support Contextual Action Bar (CAB).
     */
    private ActionMode mActionMode;
    /**
     * Hosting activity interface.
     */
    private IMainActivity mIMainActivity;

    // *********************** LISTENERS ********************************************************************

    /**
     * Listener for click on one item of the list.
     * Opens a new fragment displaying detail on trip.
     */
    private AdapterView.OnItemClickListener mClickListener = new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(final AdapterView<?> parent, final View view, final int position, final long id) {
            Trip clickedTrip = (Trip) mTripListView.getItemAtPosition(position);
            mIMainActivity.openTripDetailFragment(clickedTrip);
        }
    };

    /**
     * Listener for long click on one item of the list.
     * Opens the contextual action bar.
     */
    @NonNull
    private AdapterView.OnItemLongClickListener mLongClickListener = new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(final AdapterView<?> arg0, final View arg1, final int pos, final long id) {

            // keep item selected
            mTripListView.setItemChecked(pos, true);

            // starting action mode
            mActionMode = getActivity().startActionMode(new ActionMode.Callback() {
                @Override
                public boolean onCreateActionMode(final ActionMode mode, final Menu menu) {
                    mode.setTitle("Selected");

                    MenuInflater inflater = mode.getMenuInflater();
                    inflater.inflate(R.menu.menu_main_cab, menu);
                    return true;
                }

                @Override
                public boolean onPrepareActionMode(final ActionMode mode, final Menu menu) {
                    return false;
                }

                @Override
                public boolean onActionItemClicked(final ActionMode mode, final MenuItem item) {
                    switch (item.getItemId()) {
                    case R.id.action_delete:
                        int position = (int) mActionMode.getTag();
                        deleteTripClicked(position);
                        return true;
                    default:
                        return false;
                    }
                }

                @Override
                public void onDestroyActionMode(final ActionMode mode) {
                }
            });
            mActionMode.setTag(pos);
            arg1.setSelected(true);
            return true;
        }

    };

    // *********************** METHODS **********************************************************************

    /**
     * Empty constructor.
     */
    public MainActivityFragment() {
    }

    @Override
    public final void onCreate(@Nullable final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mIMainActivity = (IMainActivity) getActivity();
        mSavingModule = ((PackListApp) getActivity().getApplication()).getSavingModule();
    }

    @Override
    public final View onCreateView(final LayoutInflater inflater, final ViewGroup container,
            final Bundle savedInstanceState) {
        mRootView = inflater.inflate(R.layout.fragment_main, container, false);
        return mRootView;
    }

    @Override
    public final void onViewCreated(final View view, @Nullable final Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        populateList();
    }

    @Override
    public final void onResume() {
        super.onResume();
        populateList();
        mIMainActivity.showFAB(true);
    }
    // *********************** PRIVATE METHODS **************************************************************

    /**
     * Populate list with data in {@link ISavingModule}.
     */
    private void populateList() {
        mTripListView = (ListView) mRootView.findViewById(R.id.main__trip_list);
        List<Trip> tripList;

        tripList = mSavingModule.loadSavedTrips();

        TripAdapter tripAdapter = new TripAdapter(tripList, this.getActivity());
        mTripListView.setEmptyView(mRootView.findViewById(R.id.main__trip_list_empty));
        mTripListView.setAdapter(tripAdapter);
        mTripListView.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
        mTripListView.setOnItemClickListener(mClickListener);
        mTripListView.setOnItemLongClickListener(mLongClickListener);
        mTripListView.invalidate();
    }

    /**
     * Effectively delete selected trip then refresh the list.
     *
     * @param parPosition position in list of trip to be deleted
     */
    private void deleteTripClicked(final int parPosition) {
        Trip selectedTrip = (Trip) mTripListView.getItemAtPosition(parPosition);
        mSavingModule.deleteTrip(selectedTrip.getUUID());
        mActionMode.finish();
        populateList();
    }

}