/*
* @(#)MetalMenuBarUI.java 1.7 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.swing.plaf.metal;
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.*;
/**
* Metal implementation of <code>MenuBarUI</code>. This class is responsible
* for providing the metal look and feel for <code>JMenuBar</code>s.
*
* @version 1.7 11/17/05
* @see javax.swing.plaf.MenuBarUI
* @since 1.5
*/
public class MetalMenuBarUI extends BasicMenuBarUI {
/**
* Creates the <code>ComponentUI</code> implementation for the passed
* in component.
*
* @param x JComponent to create the ComponentUI implementation for
* @return ComponentUI implementation for <code>x</code>
* @throws NullPointerException if <code>x</code> is null
*/
public static ComponentUI createUI(JComponent x) {
if (x == null) {
throw new NullPointerException("Must pass in a non-null component");
}
return new MetalMenuBarUI();
}
/**
* Configures the specified component appropriate for the metal look and
* feel.
*
* @param c the component where this UI delegate is being installed
* @throws NullPointerException if <code>c</code> is null.
*/
public void installUI(JComponent c) {
super.installUI(c);
MetalToolBarUI.register(c);
}
/**
* Reverses configuration which was done on the specified component during
* <code>installUI</code>.
*
* @param c the component where this UI delegate is being installed
* @throws NullPointerException if <code>c</code> is null.
*/
public void uninstallUI(JComponent c) {
super.uninstallUI(c);
MetalToolBarUI.unregister(c);
}
/**
* If necessary paints the background of the component, then
* invokes <code>paint</code>.
*
* @param g Graphics to paint to
* @param c JComponent painting on
* @throws NullPointerException if <code>g</code> or <code>c</code> is
* null
* @see javax.swing.plaf.ComponentUI#update
* @see javax.swing.plaf.ComponentUI#paint
* @since 1.5
*/
public void update(Graphics g, JComponent c) {
boolean isOpaque = c.isOpaque();
if (g == null) {
throw new NullPointerException("Graphics must be non-null");
}
if (isOpaque && (c.getBackground() instanceof UIResource) &&
UIManager.get("MenuBar.gradient") != null) {
if (MetalToolBarUI.doesMenuBarBorderToolBar((JMenuBar)c)) {
JToolBar tb = (JToolBar)MetalToolBarUI.
findRegisteredComponentOfType(c, JToolBar.class);
if (tb.isOpaque() &&tb.getBackground() instanceof UIResource) {
MetalUtils.drawGradient(c, g, "MenuBar.gradient", 0, 0,
c.getWidth(), c.getHeight() +
tb.getHeight(), true);
paint(g, c);
return;
}
}
MetalUtils.drawGradient(c, g, "MenuBar.gradient", 0, 0,
c.getWidth(), c.getHeight(),true);
paint(g, c);
}
else {
super.update(g, c);
}
}
}