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120 lines
3.4 KiB
120 lines
3.4 KiB
/*
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* Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package javax.swing.plaf.metal;
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import java.awt.*;
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import javax.swing.*;
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import javax.swing.plaf.ComponentUI;
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import javax.swing.plaf.UIResource;
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import javax.swing.plaf.basic.*;
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/**
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* Metal implementation of <code>MenuBarUI</code>. This class is responsible
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* for providing the metal look and feel for <code>JMenuBar</code>s.
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*
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* @see javax.swing.plaf.MenuBarUI
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* @since 1.5
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*/
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public class MetalMenuBarUI extends BasicMenuBarUI {
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/**
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* Creates the <code>ComponentUI</code> implementation for the passed
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* in component.
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*
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* @param x JComponent to create the ComponentUI implementation for
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* @return ComponentUI implementation for <code>x</code>
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* @throws NullPointerException if <code>x</code> is null
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*/
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public static ComponentUI createUI(JComponent x) {
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if (x == null) {
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throw new NullPointerException("Must pass in a non-null component");
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}
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return new MetalMenuBarUI();
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}
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/**
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* Configures the specified component appropriate for the metal look and
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* feel.
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*
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* @param c the component where this UI delegate is being installed
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* @throws NullPointerException if <code>c</code> is null.
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*/
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public void installUI(JComponent c) {
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super.installUI(c);
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MetalToolBarUI.register(c);
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}
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/**
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* Reverses configuration which was done on the specified component during
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* <code>installUI</code>.
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*
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* @param c the component where this UI delegate is being installed
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* @throws NullPointerException if <code>c</code> is null.
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*/
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public void uninstallUI(JComponent c) {
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super.uninstallUI(c);
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MetalToolBarUI.unregister(c);
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}
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/**
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* If necessary paints the background of the component, then
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* invokes <code>paint</code>.
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*
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* @param g Graphics to paint to
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* @param c JComponent painting on
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* @throws NullPointerException if <code>g</code> or <code>c</code> is
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* null
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* @see javax.swing.plaf.ComponentUI#update
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* @see javax.swing.plaf.ComponentUI#paint
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* @since 1.5
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*/
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public void update(Graphics g, JComponent c) {
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boolean isOpaque = c.isOpaque();
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if (g == null) {
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throw new NullPointerException("Graphics must be non-null");
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}
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if (isOpaque && (c.getBackground() instanceof UIResource) &&
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UIManager.get("MenuBar.gradient") != null) {
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if (MetalToolBarUI.doesMenuBarBorderToolBar((JMenuBar)c)) {
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JToolBar tb = (JToolBar)MetalToolBarUI.
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findRegisteredComponentOfType(c, JToolBar.class);
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if (tb.isOpaque() &&tb.getBackground() instanceof UIResource) {
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MetalUtils.drawGradient(c, g, "MenuBar.gradient", 0, 0,
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c.getWidth(), c.getHeight() +
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tb.getHeight(), true);
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paint(g, c);
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return;
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}
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}
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MetalUtils.drawGradient(c, g, "MenuBar.gradient", 0, 0,
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c.getWidth(), c.getHeight(),true);
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paint(g, c);
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}
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else {
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super.update(g, c);
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}
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}
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}
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