Java Swing Font Width getStringWidth(final Font aFont, final String aString)

Description

Returns the string width for a given Font and string.

License

Open Source License

Parameter

Parameter	Description
aFont	the font to create the string width;
aString	the string to get the width for.

Return

a string width, >= 0.

Declaration

public static int getStringWidth(final Font aFont, final String aString) 

Method Source Code

//package com.java2s;
/*//from   www . j  a  v a  2s  .  c om
 * OpenBench LogicSniffer / SUMP project 
 *
 * 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 2 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 *
 * Copyright (C) 2006-2010 Michael Poppitz, www.sump.org
 * Copyright (C) 2010 J.W. Janssen, www.lxtreme.nl
 */

import java.awt.*;

import java.awt.image.*;
import javax.swing.*;

public class Main {
    /** The key for the default label font as used by Swing. */
    public static final String SWING_LABEL_FONT = "Label.font";

    /**
     * Returns the string width for a given {@link Font} and string.
     * 
     * @param aFont
     *          the font to create the string width;
     * @param aString
     *          the string to get the width for.
     * @return a string width, >= 0.
     */
    public static int getStringWidth(final Font aFont, final String aString) {
        final FontMetrics frc = createFontMetrics(aFont);
        return SwingUtilities.computeStringWidth(frc, aString);
    }

    /**
     * Returns the string width for the default label font and string.
     * 
     * @param aString
     *          the string to get the width for.
     * @return a string width, >= 0.
     */
    public static int getStringWidth(final String aString) {
        return getStringWidth(UIManager.getFont(SWING_LABEL_FONT), aString);
    }

    /**
     * Creates (in a rather clumsy way) the font metrics for a given {@link Font}.
     * 
     * @param aFont
     *          the font instance to create the font metrics for, cannot be
     *          <code>null</code>.
     * @return a font metrics, never <code>null</code>.
     */
    private static FontMetrics createFontMetrics(final Font aFont) {
        BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
        Graphics canvas = img.getGraphics();

        try {
            return canvas.getFontMetrics(aFont);
        } finally {
            canvas.dispose();
            canvas = null;
            img = null;
        }
    }
}

Related

1. estimateWidth(Font font, String msg)
2. getEditor(String html, int width, Color transparentColor, Font font)
3. getHTMLTextForWidth(JComponent comp, double bboxWth, String txt, Font font)
4. getStringWidth(Font font, String str)
5. getTextWidth(final String text, final Font font)
6. getTextWidth(Font font, String text)
7. isFixedWidthFont(String fontName, Component component)