JDK8/Java8源码在线阅读

/*
 * Copyright (c) 1997, 2006, 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 com.sun.java.swing.plaf.motif;

import java.awt.*;
import java.awt.event.*;

import java.io.*;
import java.util.*;

import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.tree.*;
import javax.swing.plaf.basic.*;

/**
 * Motif rendition of the tree component.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases.  The current serialization support is appropriate
 * for short term storage or RMI between applications running the same
 * version of Swing.  A future release of Swing will provide support for
 * long term persistence.
 *
 * @author Jeff Dinkins
 */
public class MotifTreeUI extends BasicTreeUI
{
    static final int HALF_SIZE = 7;
    static final int SIZE = 14;

    /**
     * creates a UI object to represent a Motif Tree widget
     */
    public MotifTreeUI() {
        super();
    }

    public void installUI(JComponent c) {
        super.installUI(c);
    }

    // BasicTreeUI overrides

    protected void paintVerticalLine( Graphics g, JComponent c, int x, int top, int bottom )
      {
          if (tree.getComponentOrientation().isLeftToRight()) {
              g.fillRect( x, top, 2, bottom - top + 2 );
          } else {
              g.fillRect( x - 1, top, 2, bottom - top + 2 );
          }
      }

    protected void paintHorizontalLine( Graphics g, JComponent c, int y, int left, int right )
      {
          g.fillRect( left, y, right - left + 1, 2 );
      }


    /**
     * The minus sign button icon.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     */
    public static class MotifExpandedIcon implements Icon, Serializable {
        static Color bg;
        static Color fg;
        static Color highlight;
        static Color shadow;

        public MotifExpandedIcon() {
            bg = UIManager.getColor("Tree.iconBackground");
            fg = UIManager.getColor("Tree.iconForeground");
            highlight = UIManager.getColor("Tree.iconHighlight");
            shadow = UIManager.getColor("Tree.iconShadow");
        }

        public static Icon createExpandedIcon() {
            return new MotifExpandedIcon();
        }

        public void paintIcon(Component c, Graphics g, int x, int y) {
            g.setColor(highlight);
            g.drawLine(x, y, x+SIZE-1, y);
            g.drawLine(x, y+1, x, y+SIZE-1);

            g.setColor(shadow);
            g.drawLine(x+SIZE-1, y+1, x+SIZE-1, y+SIZE-1);
            g.drawLine(x+1, y+SIZE-1, x+SIZE-1, y+SIZE-1);

            g.setColor(bg);
            g.fillRect(x+1, y+1, SIZE-2, SIZE-2);

            g.setColor(fg);
            g.drawLine(x+3, y+HALF_SIZE-1, x+SIZE-4, y+HALF_SIZE-1);
            g.drawLine(x+3, y+HALF_SIZE, x+SIZE-4, y+HALF_SIZE);
        }

        public int getIconWidth() { return SIZE; }
        public int getIconHeight() { return SIZE; }
    }

    /**
     * The plus sign button icon.
     * <p>
     * <strong>Warning:</strong>
     * Serialized objects of this class will not be compatible with
     * future Swing releases.  The current serialization support is appropriate
     * for short term storage or RMI between applications running the same
     * version of Swing.  A future release of Swing will provide support for
     * long term persistence.
     */
    public static class MotifCollapsedIcon extends MotifExpandedIcon {
        public static Icon createCollapsedIcon() {
            return new MotifCollapsedIcon();
        }


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