Java Swing Font Metrics getFontMetrics(JComponent c, Graphics g)

Description

Copied from JDK's SwingUtilities2.java

Returns the FontMetrics for the current Font of the passed in Graphics.

License

Open Source License

Parameter

Parameter	Description
c	JComponent requesting FontMetrics, may be null
g	Graphics Graphics

Declaration

public static FontMetrics getFontMetrics(JComponent c, Graphics g) 

Method Source Code

//package com.java2s;
import javax.swing.*;

import java.awt.*;

public class Main {
    /**/*from  ww w .java2s. co  m*/
     * Copied from JDK's SwingUtilities2.java
     * <p/>
     * Returns the FontMetrics for the current Font of the passed in Graphics.  This method is used when a Graphics is
     * available, typically when painting.  If a Graphics is not available the JComponent method of the same name should
     * be used.
     * <p/>
     * Callers should pass in a non-null JComponent, the exception to this is if a JComponent is not readily available
     * at the time of painting.
     * <p/>
     * This does not necessarily return the FontMetrics from the Graphics.
     *
     * @param c JComponent requesting FontMetrics, may be null
     * @param g Graphics Graphics
     */
    public static FontMetrics getFontMetrics(JComponent c, Graphics g) {
        return getFontMetrics(c, g, g.getFont());
    }

    /**
     * Copied from JDK's SwingUtilities2.java
     * <p/>
     * Returns the FontMetrics for the specified Font. This method is used when a Graphics is available, typically when
     * painting.  If a Graphics is not available the JComponent method of the same name should be used.
     * <p/>
     * Callers should pass in a non-null JComponent, the exception to this is if a JComponent is not readily available
     * at the time of painting.
     * <p/>
     * This does not necessarily return the FontMetrics from the Graphics.
     *
     * @param c    JComponent requesting FontMetrics, may be null
     * @param c    Graphics Graphics
     * @param font Font to get FontMetrics for
     */
    public static FontMetrics getFontMetrics(JComponent c, Graphics g,
            Font font) {
        if (c != null) {
            // Note: We assume that we're using the FontMetrics
            // from the widget to layout out text, otherwise we can get
            // mismatches when printing.
            return c.getFontMetrics(font);
        }
        return Toolkit.getDefaultToolkit().getFontMetrics(font);
    }
}

Related

1. getFontMetrics(Font font)
2. getFontMetrics(Font font)
3. getFontMetrics(JComponent c, Graphics g)
4. getFontMetrics(JComponent c, Graphics g)
5. getFontMetrics(JComponent c, Graphics g)
6. getFontMetrics(JComponent c, Graphics g)
7. getFontMetrics(JComponent c, Graphics g, Font f)
8. getFontMetrics(JComponent c, Graphics g, Font font)
9. getFRC(JComponent c, FontMetrics fm)