Returns the color to use for hyperlink-style components. - Java Swing

Java examples for Swing:JLabel

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Description

Returns the color to use for hyperlink-style components.

Demo Code

/*/*from w  w w. j  a  v  a2 s .c  o m*/
 * 09/08/2005
 *
 * UIUtil.java - Utility methods for org.fife.ui classes.
 * Copyright (C) 2005 Robert Futrell
 * http://fifesoft.com/rtext
 * Licensed under a modified BSD license.
 * See the included license file for details.
 */
//package com.java2s;

import java.awt.Color;

import javax.swing.JLabel;

import javax.swing.UIManager;

public class Main {
    /**
     * Used for the color of hyperlinks when a LookAndFeel uses light text
     * against a dark background.
     */
    private static final Color LIGHT_HYPERLINK_FG = new Color(0xd8ffff);

    /**
     * Returns the color to use for hyperlink-style components.  This method
     * will return <code>Color.blue</code> unless it appears that the current
     * LookAndFeel uses light text on a dark background, in which case a
     * brighter alternative is returned.
     *
     * @return The color to use for hyperlinks.
     */
    public static final Color getHyperlinkForeground() {

        // This property is defined by all standard LaFs, even Nimbus (!),
        // but you never know what crazy LaFs there are...
        Color fg = UIManager.getColor("Label.foreground");
        if (fg == null) {
            fg = new JLabel().getForeground();
        }

        return isLightForeground(fg) ? LIGHT_HYPERLINK_FG : Color.blue;

    }

    /**
     * Returns whether the specified color is "light" to use as a foreground.
     * Colors that return <code>true</code> indicate that the current Look and
     * Feel probably uses light text colors on a dark background.
     *
     * @param fg The foreground color.
     * @return Whether it is a "light" foreground color.
     */
    public static final boolean isLightForeground(Color fg) {
        return fg.getRed() > 0xa0 && fg.getGreen() > 0xa0
                && fg.getBlue() > 0xa0;
    }
}

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