FileDialog.java

/*
 *  This file is part of Oekaki Mobile.
 *  Copyright (C) 2013 Jeremy Lam
 *  
 *  This program 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.
 *  
 *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package idv.jlchntoz.oekakimobile;

import java.io.*;
import java.util.*;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.*;
import android.widget.AdapterView.OnItemClickListener;

public class FileDialog implements OnItemClickListener {
	public interface FileDialogCallBack {
		public void onCallBack(FileDialog which, File file);
	}

	private final Context context;
	private final FileDialogCallBack callBack;
	private final View DialogView;
	private final EditText tvfiles;
	private final ListView lvwfiles;
	private final boolean isOpenDialog;
	private final String[] extensionFilter;
	private ArrayAdapter<String> aafileList;
	private ArrayList<String> fileNameList;
	private ArrayList<File> fileList;
	private AlertDialog dialog;
	private String prompt, path, name;
	private File path_file;
	private int selitem;

	public FileDialog(Context context, String prompt, String basepath,
			String filename, String[] extensionFilter, boolean isOpenDialog,
			FileDialogCallBack Callback) {
		callBack = Callback;
		this.context = context;
		this.prompt = prompt;
		path = basepath;
		name = filename;
		this.isOpenDialog = isOpenDialog;
		this.extensionFilter = extensionFilter;

		DialogView = LayoutInflater.from(context).inflate(R.layout.filedlg, null);
		tvfiles = (EditText) DialogView.findViewById(R.id.etfilename);
		lvwfiles = (ListView) DialogView.findViewById(R.id.lvwfiles);

		if (this.isOpenDialog)
			tvfiles.setVisibility(View.GONE);
		else
			tvfiles.setText(filename);

		buildAdapter();
		buildDialog();
	}

	private void buildDialog() {
		AlertDialog.Builder builder = new AlertDialog.Builder(context);
		builder.setTitle(prompt);
		builder.setView(DialogView);
		builder.setPositiveButton(android.R.string.ok,
				new DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						doCallback();
					}
				});

		builder.setNegativeButton(android.R.string.cancel,
				new DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.cancel();
					}
				});
		dialog = builder.create();
	}

	private void buildAdapter() {
		path_file = new File(path);
		path_file.mkdirs();
		File[] files = path_file.listFiles();
		fileNameList = new ArrayList<String>();
		fileList = new ArrayList<File>();
		if (files != null)
			for (File file : files)
				if (file.isFile())
					if (extensionFilter != null && extensionFilter.length > 0) {
						for (String ext : extensionFilter)
							if (file.getName().endsWith("." + ext)) {
								fileList.add(file);
								fileNameList.add(file.getName());
							}
					} else {
						fileList.add(file);
						fileNameList.add(file.getName());
					}
		aafileList = new ArrayAdapter<String>(context,
				android.R.layout.simple_list_item_1, fileNameList);
		lvwfiles.setAdapter(aafileList);
		lvwfiles.setOnItemClickListener(this);
		selitem = 0;
	}

	public void showDialog() {
		dialog.show();
	}

	@Override
	public void onItemClick(AdapterView<?> parent, View v, int pos, long i) {
		selitem = pos;
		tvfiles.setText(fileList.get(selitem).getName());
		doCallback();
	}

	private void doCallback() {
		name = tvfiles.getText().toString();
		File ret = new File(path, name);
		if (isOpenDialog && !ret.exists())
			Toast.makeText(
					context,
					String.format(context.getString(R.string.filenotexists),
							ret.getName()), Toast.LENGTH_LONG).show();
		callBack.onCallBack(FileDialog.this, ret);
	}

}