org.totschnig.myexpenses.dialog.SelectFromTableDialogFragment.java Source code

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Here is the source code for org.totschnig.myexpenses.dialog.SelectFromTableDialogFragment.java

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/*   This file is part of My Expenses.
 *   My Expenses is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   My Expenses is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with My Expenses.  If not, see <http://www.gnu.org/licenses/>.
*/

package org.totschnig.myexpenses.dialog;

import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
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.util.SparseBooleanArray;
import android.widget.ListView;

import org.totschnig.myexpenses.ui.SimpleCursorAdapter;

import java.util.ArrayList;

public abstract class SelectFromTableDialogFragment extends CommitSafeDialogFragment
        implements OnClickListener, LoaderManager.LoaderCallbacks<Cursor> {
    private SimpleCursorAdapter mAdapter;
    private Cursor mCursor;

    abstract int getDialogTitle();

    abstract Uri getUri();

    abstract String getColumn();

    abstract void onResult(ArrayList<String> labelList, long[] itemIds);

    abstract String[] getSelectionArgs();

    abstract String getSelection();

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        mAdapter = new SimpleCursorAdapter(getActivity(), android.R.layout.simple_list_item_multiple_choice, null,
                new String[] { getColumn() }, new int[] { android.R.id.text1 }, 0);
        getLoaderManager().initLoader(0, null, this);
        final AlertDialog dialog = new AlertDialog.Builder(getActivity()).setTitle(getDialogTitle())
                .setAdapter(mAdapter, null).setPositiveButton(android.R.string.ok, this)
                .setNegativeButton(android.R.string.cancel, null).create();
        dialog.getListView().setItemsCanFocus(false);
        dialog.getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        return dialog;
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        if (getActivity() == null || mCursor == null) {
            return;
        }
        ListView listView = ((AlertDialog) dialog).getListView();
        SparseBooleanArray positions = listView.getCheckedItemPositions();

        long[] itemIds = listView.getCheckedItemIds();

        if (itemIds.length > 0) {
            ArrayList<String> labelList = new ArrayList<>();
            for (int i = 0; i < positions.size(); i++) {
                if (positions.valueAt(i)) {
                    mCursor.moveToPosition(positions.keyAt(i));
                    labelList.add(mCursor.getString(mCursor.getColumnIndex(getColumn())));
                }
            }
            onResult(labelList, itemIds);
        }
        dismiss();
    }

    @Override
    public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
        if (getActivity() == null) {
            return null;
        }
        return new CursorLoader(getActivity(), getUri(), null, getSelection(), getSelectionArgs(), null);

    }

    @Override
    public void onLoadFinished(Loader<Cursor> arg0, Cursor data) {
        mCursor = data;
        mAdapter.swapCursor(data);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> arg0) {
        mCursor = null;
        mAdapter.swapCursor(null);
    }
}