HelpLabel.java

/*
 * This file is part of the aidGer project.
 *
 * Copyright (C) 2010-2013 The aidGer Team
 *
 * 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 de.aidger.view.utils;

import java.awt.Insets;

import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JToolTip;
import javax.swing.UIDefaults;
import javax.swing.UIManager;

/**
 * The help label is used for displaying helpful user information by opening a
 * styled tool tip.
 * 
 * @author aidGer Team
 */
@SuppressWarnings("serial")
public class HelpLabel extends JLabel {

    /**
     * Constructs a helper label.
     */
    public HelpLabel() {
        setIcon(new ImageIcon(getClass().getResource(
            "/de/aidger/res/icons/question-large.png")));
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.swing.JComponent#createToolTip()
     */
    @Override
    public JToolTip createToolTip() {
        return new HelpToolTip();
    }

    /**
     * A custom styled tool tip.
     * 
     * @author aidGer Team
     */
    private class HelpToolTip extends JToolTip {
        public HelpToolTip() {
            UIDefaults defaults = new UIDefaults();

            defaults.put("ToolTip[Enabled].backgroundPainter", UIManager
                .get("PopupMenu[Enabled].backgroundPainter"));
            defaults.put("ToolTip.contentMargins", new Insets(5, 5, 5, 5));

            putClientProperty("Nimbus.Overrides.InheritDefaults", false);
            putClientProperty("Nimbus.Overrides", defaults);

            updateUI();
        }
    }
}