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Java example source code file (SynthIcon.java)

This example Java source code file (SynthIcon.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, border, graphics, gui, icon, plaf, swing, synthcontext, synthicon

The SynthIcon.java Java example source code

/*
 * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package sun.swing.plaf.synth;

import javax.swing.plaf.synth.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.UIResource;

/**
 * An icon that is passed a SynthContext. Subclasses need only implement
 * the variants that take a SynthContext, but must be prepared for the
 * SynthContext to be null.
 *
 * @author Scott Violet
 */
public abstract class SynthIcon implements Icon {
    public static int getIconWidth(Icon icon, SynthContext context) {
        if (icon == null) {
            return 0;
        }
        if (icon instanceof SynthIcon) {
            return ((SynthIcon)icon).getIconWidth(context);
        }
        return icon.getIconWidth();
    }

    public static int getIconHeight(Icon icon, SynthContext context) {
        if (icon == null) {
            return 0;
        }
        if (icon instanceof SynthIcon) {
            return ((SynthIcon)icon).getIconHeight(context);
        }
        return icon.getIconHeight();
    }

    public static void paintIcon(Icon icon, SynthContext context, Graphics g,
                                 int x, int y, int w, int h) {
        if (icon instanceof SynthIcon) {
            ((SynthIcon)icon).paintIcon(context, g, x, y, w, h);
        }
        else if (icon != null) {
            icon.paintIcon(context.getComponent(), g, x, y);
        }
    }

    /**
     * Paints the icon at the specified location.
     *
     * @param context Identifies hosting region, may be null.
     * @param x x location to paint to
     * @param y y location to paint to
     * @param w Width of the region to paint to, may be 0
     * @param h Height of the region to paint to, may be 0
     */
    public abstract void paintIcon(SynthContext context, Graphics g, int x,
                                   int y, int w, int h);

    /**
     * Returns the desired width of the Icon.
     *
     * @param context SynthContext requesting the Icon, may be null.
     * @return Desired width of the icon.
     */
    public abstract int getIconWidth(SynthContext context);

    /**
     * Returns the desired height of the Icon.
     *
     * @param context SynthContext requesting the Icon, may be null.
     * @return Desired height of the icon.
     */
    public abstract int getIconHeight(SynthContext context);

    /**
     * Paints the icon. This is a cover method for
     * <code>paintIcon(null, g, x, y, 0, 0)
     */
    public void paintIcon(Component c, Graphics g, int x, int y) {
        paintIcon(null, g, x, y, 0, 0);
    }

    /**
     * Returns the icon's width. This is a cover methods for
     * <code>getIconWidth(null).
     *
     * @return an int specifying the fixed width of the icon.
     */
    public int getIconWidth() {
        return getIconWidth(null);
    }

    /**
     * Returns the icon's height. This is a cover method for
     * <code>getIconHeight(null).
     *
     * @return an int specifying the fixed height of the icon.
     */
    public int getIconHeight() {
        return getIconHeight(null);
    }
}

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