fontdisplayfield.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 111 行

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 * 
 * Project Info:  http://www.jfree.org/jcommon/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 * 
 * ---------------------
 * FontDisplayField.java
 * ---------------------
 * (C) Copyright 2000-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Arnaud Lelievre;
 *
 * $Id: FontDisplayField.java,v 1.2 2005/06/01 14:12:29 taqua Exp $
 *
 * Changes (from 26-Oct-2001)
 * ----------------------------------
 * 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
 * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 08-Sep-2003 : Added internationalization via use of properties resourceBundle (RFE 690236) (AL);
 *
 */

package org.jfree.ui;

import java.awt.Font;
import java.util.ResourceBundle;

import javax.swing.JTextField;

/**
 * A field for displaying a font selection.  The display field itself is read-only, to the developer
 * must provide another mechanism to allow the user to change the font.
 *
 * @author David Gilbert
 */
public class FontDisplayField extends JTextField {

    /** The current font. */
    private Font displayFont;

    /** The resourceBundle for the localization. */
    protected static final ResourceBundle localizationResources = 
        ResourceBundle.getBundle("org.jfree.ui.LocalizationBundle");

    /**
     * Standard constructor - builds a FontDescriptionField initialised with the specified font.
     *
     * @param font  the font.
     */
    public FontDisplayField(final Font font) {
        super("");
        setDisplayFont(font);
        setEnabled(false);
    }

    /**
     * Returns the current font.
     *
     * @return the font.
     */
    public Font getDisplayFont() {
        return this.displayFont;
    }

    /**
     * Sets the font.
     *
     * @param font  the font.
     */
    public void setDisplayFont(final Font font) {
        this.displayFont = font;
        setText(fontToString(this.displayFont));
    }

    /**
     * Returns a string representation of the specified font.
     *
     * @param font  the font.
     *
     * @return a string describing the font.
     */
    private String fontToString(final Font font) {
        if (font != null) {
            return font.getFontName() + ", " + font.getSize();
        }
        else {
            return localizationResources.getString("No_Font_Selected");
        }
    }

}