org.transdroid.core.gui.navigation.SetStorageLocationDialog.java Source code

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Here is the source code for org.transdroid.core.gui.navigation.SetStorageLocationDialog.java

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/* 
 * Copyright 2010-2013 Eric Kok et al.
 * 
 * Transdroid 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.
 * 
 * Transdroid 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 Transdroid.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.transdroid.core.gui.navigation;

import java.security.InvalidParameterException;

import org.transdroid.core.R;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.View;
import android.widget.EditText;

/**
 * A dialog fragment that allows changing of the storage location by editing the path text directly.
 * @author Eric Kok
 */
public class SetStorageLocationDialog extends DialogFragment {

    private OnStorageLocationUpdatedListener onStorageLocationUpdatedListener = null;
    private String currentLocation = null;

    public SetStorageLocationDialog() {
        setRetainInstance(true);
    }

    /**
     * Sets the callback for when the user is done updating the storage location.
     * @param onStorageLocationUpdatedListener The event listener to this dialog
     * @return This dialog, for method chaining
     */
    public SetStorageLocationDialog setOnStorageLocationUpdated(
            OnStorageLocationUpdatedListener onStorageLocationUpdatedListener) {
        this.onStorageLocationUpdatedListener = onStorageLocationUpdatedListener;
        return this;
    }

    /**
     * Sets the current storage location that will be available to the user to edit
     * @param currentLocation The current storage location path as text
     * @return This dialog, for method chaining
     */
    public SetStorageLocationDialog setCurrentLocation(String currentLocation) {
        this.currentLocation = currentLocation;
        return this;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        if (currentLocation == null)
            throw new InvalidParameterException(
                    "Please first set the current trackers text using setCurrentLocation before opening the dialog.");
        if (onStorageLocationUpdatedListener == null)
            throw new InvalidParameterException(
                    "Please first set the callback listener using setOnStorageLocationUpdated before opening the dialog.");
        final View locationFrame = getActivity().getLayoutInflater().inflate(R.layout.dialog_storagelocation, null,
                false);
        final EditText locationText = (EditText) locationFrame.findViewById(R.id.location_edit);
        locationText.setText(currentLocation);
        return new AlertDialog.Builder(getActivity()).setView(locationFrame)
                .setPositiveButton(R.string.status_update, new OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // User is done editing and requested to update given the text input
                        onStorageLocationUpdatedListener
                                .onStorageLocationUpdated(locationText.getText().toString());
                    }
                }).setNegativeButton(android.R.string.cancel, null).show();
    }

    public interface OnStorageLocationUpdatedListener {
        public void onStorageLocationUpdated(String newLocation);
    }

}