TextSelector.java

/*
 * SleepArchiver - cross-platform data manager for Sleeptracker-series watches.
 * Copyright (C) 2009-2011 Pavel Fatin <http://pavelfatin.com>
 *
 * 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 com.pavelfatin.sleeparchiver.swing;

import javax.swing.*;
import javax.swing.text.JTextComponent;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.util.regex.Pattern;

class TextSelector extends FocusAdapter implements Runnable {
    private final Pattern NUMBER = Pattern.compile("\\d");

    private JTextComponent _field;


    public TextSelector(JTextComponent field) {
        _field = field;
    }

    @Override
    public void focusGained(FocusEvent e) {
        SwingUtilities.invokeLater(this);
    }

    private boolean containsUserInput() {
        String text = _field.getText();
        return NUMBER.matcher(text).find();
    }

    public void run() {
        if (containsUserInput()) {
            _field.selectAll();
        }
    }
}