com.ultramegasoft.flavordex2.dialog.CatListDialog.java Source code

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Here is the source code for com.ultramegasoft.flavordex2.dialog.CatListDialog.java

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/*
 * The MIT License (MIT)
 * Copyright  2016 Steve Guidetti
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the Software?), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED AS IS?, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.ultramegasoft.flavordex2.dialog;

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import com.ultramegasoft.flavordex2.EditCatActivity;
import com.ultramegasoft.flavordex2.R;
import com.ultramegasoft.flavordex2.provider.Tables;
import com.ultramegasoft.flavordex2.widget.CatListAdapter;

/**
 * Dialog to select a category.
 *
 * @author Steve Guidetti
 */
public class CatListDialog extends DialogFragment implements LoaderManager.LoaderCallbacks<Cursor> {
    private static final String TAG = "CatListDialog";

    /**
     * Keys for the result data Intent
     */
    public static final String EXTRA_CAT_ID = "cat_id";
    public static final String EXTRA_CAT_NAME = "cat_name";

    /**
     * The Adapter backing the list
     */
    private CatListAdapter mAdapter;

    /**
     * Show the dialog.
     *
     * @param fm          The FragmentManager to use
     * @param target      The Fragment to notify of the result
     * @param requestCode A number to identify this request
     */
    public static void showDialog(@NonNull FragmentManager fm, @Nullable Fragment target, int requestCode) {
        final DialogFragment fragment = new CatListDialog();
        fragment.setTargetFragment(target, requestCode);

        fragment.show(fm, TAG);
    }

    /**
     * Close the dialog.
     *
     * @param fm The FragmentManager to use
     */
    public static void closeDialog(@NonNull FragmentManager fm) {
        final DialogFragment fragment = (DialogFragment) fm.findFragmentByTag(TAG);
        if (fragment != null) {
            fragment.dismiss();
        }
    }

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

        final Context context = getContext();
        if (context == null) {
            return;
        }

        mAdapter = new CatListAdapter(context, null, android.R.layout.simple_list_item_1);
        getLoaderManager().initLoader(0, null, this);
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Context context = getContext();
        if (context == null) {
            return super.onCreateDialog(savedInstanceState);
        }

        final ListView listView = getLayout();
        listView.setAdapter(mAdapter);
        return new AlertDialog.Builder(context).setTitle(R.string.title_select_cat).setIcon(R.drawable.ic_list)
                .setView(listView).setNegativeButton(R.string.button_cancel, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                }).create();
    }

    /**
     * Get the layout for the Dialog.
     *
     * @return The View to place inside the Dialog
     */
    @NonNull
    private ListView getLayout() {
        final ListView listView = new ListView(getContext());
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                onCatSelected(position, id);
            }
        });
        listView.addFooterView(
                LayoutInflater.from(getContext()).inflate(R.layout.cat_add_list_item, listView, false));

        return listView;
    }

    /**
     * Called when a list item is selected.
     *
     * @param position The position index of the item
     * @param id       The ID of the item
     */
    private void onCatSelected(int position, long id) {
        if (position == mAdapter.getCount()) {
            startActivity(new Intent(getContext(), EditCatActivity.class));
            return;
        }
        final Fragment target = getTargetFragment();
        if (target != null) {
            final Intent intent = new Intent();
            intent.putExtra(EXTRA_CAT_ID, id);
            intent.putExtra(EXTRA_CAT_NAME, mAdapter.getItem(position).name);
            target.onActivityResult(getTargetRequestCode(), Activity.RESULT_OK, intent);
        }
    }

    @Override
    public void onCancel(DialogInterface dialog) {
        super.onCancel(dialog);
        final Fragment target = getTargetFragment();
        if (target != null) {
            target.onActivityResult(getTargetRequestCode(), Activity.RESULT_CANCELED, null);
        }
    }

    @SuppressWarnings("ConstantConditions")
    @NonNull
    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        final Context context = getContext();
        if (context == null) {
            return null;
        }

        return new CursorLoader(context, Tables.Cats.CONTENT_URI, null, null, null, null);
    }

    @Override
    public void onLoadFinished(@NonNull Loader<Cursor> loader, Cursor data) {
        mAdapter.swapCursor(data);
    }

    @Override
    public void onLoaderReset(@NonNull Loader<Cursor> loader) {
        mAdapter.swapCursor(null);
    }
}