geralt_encore.delightfulsqlbrite.todo.ui.ListsFragment.java Source code

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Here is the source code for geralt_encore.delightfulsqlbrite.todo.ui.ListsFragment.java

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/*
 * Copyright (C) 2015 Square, Inc.
 *
 * 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 geralt_encore.delightfulsqlbrite.todo.ui;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.MenuItemCompat;
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.ListView;

import com.squareup.sqlbrite.BriteDatabase;

import java.util.Arrays;

import javax.inject.Inject;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnItemClick;
import geralt_encore.delightfulsqlbrite.R;
import geralt_encore.delightfulsqlbrite.todo.TodoApp;
import geralt_encore.delightfulsqlbrite.todo.db.TodoItem;
import geralt_encore.delightfulsqlbrite.todo.db.TodoList;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;

import static android.support.v4.view.MenuItemCompat.SHOW_AS_ACTION_IF_ROOM;
import static android.support.v4.view.MenuItemCompat.SHOW_AS_ACTION_WITH_TEXT;

public final class ListsFragment extends Fragment {
    interface Listener {
        void onListClicked(long id);

        void onNewListClicked();
    }

    static ListsFragment newInstance() {
        return new ListsFragment();
    }

    @Inject
    BriteDatabase db;

    @BindView(android.R.id.list)
    ListView listView;
    @BindView(android.R.id.empty)
    View emptyView;

    private Listener listener;
    private ListsAdapter adapter;
    private Subscription subscription;

    @Override
    public void onAttach(Activity activity) {
        if (!(activity instanceof Listener)) {
            throw new IllegalStateException("Activity must implement fragment Listener.");
        }

        super.onAttach(activity);
        TodoApp.getComponent(activity).inject(this);
        setHasOptionsMenu(true);

        listener = (Listener) activity;
        adapter = new ListsAdapter(activity);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);

        MenuItem item = menu.add(R.string.new_list).setOnMenuItemClickListener(clickedItem -> {
            listener.onNewListClicked();
            return true;
        });
        MenuItemCompat.setShowAsAction(item, SHOW_AS_ACTION_IF_ROOM | SHOW_AS_ACTION_WITH_TEXT);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
            @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.lists, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        ButterKnife.bind(this, view);
        listView.setEmptyView(emptyView);
        listView.setAdapter(adapter);
    }

    @OnItemClick(android.R.id.list)
    void listClicked(long listId) {
        listener.onListClicked(listId);
    }

    @Override
    public void onResume() {
        super.onResume();

        getActivity().setTitle("To-Do");

        subscription = db
                .createQuery(Arrays.asList(TodoList.TABLE_NAME, TodoItem.TABLE_NAME),
                        TodoList.SELECT_LISTS_WITH_ITEM_COUNTS)
                .mapToList(TodoList.LISTS_ITEM_MAPPER_FUNCTION).observeOn(AndroidSchedulers.mainThread())
                .subscribe(adapter);
    }

    @Override
    public void onPause() {
        super.onPause();
        subscription.unsubscribe();
    }
}