/*
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander 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.
*
* muCommander 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.mucommander.ui.theme;
import java.awt.*;
import java.util.Vector;
/**
* Represents a default value for a theme font.
* <p>
* Instances of this class are used to provide default values for theme fonts and notify the current theme when they
* are modified.
* </p>
* <p>
* If, for example, a font should default to the look and feel defined TextArea font and the look and feel is changed,
* the corresponding {@link DefaultFont} instance will catch that event and notify the current theme of the change.
* </p>
* @author Nicolas Rinaudo
*/
public abstract class DefaultFont {
// - Instance fields -----------------------------------------------------------------------------------------------
// -----------------------------------------------------------------------------------------------------------------
/** List of fonts linked to this default value. */
private Vector<Integer> linkedFonts;
// - Initialisation ------------------------------------------------------------------------------------------------
// -----------------------------------------------------------------------------------------------------------------
/**
* Creates a new instance of {@link DefaultFont}.
*/
protected DefaultFont() {
linkedFonts = new Vector<Integer>();
}
// - Event propagation ---------------------------------------------------------------------------------------------
// -----------------------------------------------------------------------------------------------------------------
/**
* Registers a theme font as defaulting to the current instance.
* <p>
* If the default font's value were to change, the current theme will automatically be notified of the change and
* ultimately propagate to all registered theme listeners if necessary.
* </p>
* @param fontId identifier of the font that uses this instance as a default value.
*/
public void link(Integer fontId) {
linkedFonts.add(fontId);
}
/**
* Notifies the current theme of a default value change to all linked fonts.
* @param font new default font value.
*/
protected void notifyChange(Font font) {
for(int i : linkedFonts)
ThemeData.triggerFontEvent(i, font);
}
// - Abstract methods ----------------------------------------------------------------------------------------------
// -----------------------------------------------------------------------------------------------------------------
/**
* Returns the font this default value represents.
* @param data contains all the current theme values.
* @return the font this default value represents.
*/
public abstract Font getFont(ThemeData data);
}