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

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Here is the source code for org.totschnig.myexpenses.dialog.SelectMainCategoryDialogFragment.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.database.MatrixCursor;
import android.database.MergeCursor;
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.text.TextUtils;

import org.apache.commons.lang3.ArrayUtils;
import org.totschnig.myexpenses.R;
import org.totschnig.myexpenses.provider.TransactionProvider;
import org.totschnig.myexpenses.ui.SimpleCursorAdapter;

import static org.totschnig.myexpenses.provider.DatabaseConstants.KEY_LABEL;
import static org.totschnig.myexpenses.provider.DatabaseConstants.KEY_PARENTID;
import static org.totschnig.myexpenses.provider.DatabaseConstants.KEY_ROWID;

public class SelectMainCategoryDialogFragment extends CommitSafeDialogFragment
        implements OnClickListener, LoaderManager.LoaderCallbacks<Cursor> {
    public static final String KEY_RESULT = "result";
    public static final String KEY_WITH_ROOT = "with_root";
    public static final String KEY_EXCLUDED_ID = "excluded_id";
    protected SimpleCursorAdapter mAdapter;
    protected Cursor mCursor;
    private String[] projection = new String[] { KEY_ROWID, KEY_LABEL };

    public interface CategorySelectedListener {
        void onCategorySelected(Bundle args);
    }

    public static final SelectMainCategoryDialogFragment newInstance(Bundle args) {
        final SelectMainCategoryDialogFragment fragment = new SelectMainCategoryDialogFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        mAdapter = new SimpleCursorAdapter(getActivity(), android.R.layout.select_dialog_item, null,
                new String[] { KEY_LABEL }, new int[] { android.R.id.text1 }, 0);
        getLoaderManager().initLoader(0, null, this);
        final AlertDialog dialog = new AlertDialog.Builder(getActivity())
                .setTitle(R.string.dialog_title_select_target).setAdapter(mAdapter, this).create();
        //dialog.getListView().setItemsCanFocus(false);
        return dialog;
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        if (getActivity() == null || mCursor == null) {
            return;
        }
        Bundle args = getArguments();
        args.putLong(KEY_RESULT, ((AlertDialog) dialog).getListView().getItemIdAtPosition(which));
        ((CategorySelectedListener) getActivity()).onCategorySelected(args);
        dismiss();
    }

    @Override
    public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
        if (getActivity() == null) {
            return null;
        }
        String selection = KEY_PARENTID + " is null AND " + KEY_ROWID + " NOT IN ("
                + TextUtils.join(",", ArrayUtils.toObject(getArguments().getLongArray(KEY_EXCLUDED_ID))) + ")";

        CursorLoader cursorLoader = new CursorLoader(getActivity(), TransactionProvider.CATEGORIES_URI, projection,
                selection, null, null);
        return cursorLoader;

    }

    @Override
    public void onLoadFinished(Loader<Cursor> arg0, Cursor data) {
        if (getArguments().getBoolean(KEY_WITH_ROOT)) {
            MatrixCursor extras = new MatrixCursor(projection);
            extras.addRow(new String[] { "0", getString(R.string.transform_subcategory_to_main), });
            mCursor = new MergeCursor(new Cursor[] { extras, data });
        } else {
            mCursor = data;
        }
        mAdapter.swapCursor(mCursor);
    }

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