001 /* MetalSeparatorUI.java 002 Copyright (C) 2005 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package javax.swing.plaf.metal; 040 041 import java.awt.Color; 042 import java.awt.Graphics; 043 import java.awt.Rectangle; 044 045 import javax.swing.JComponent; 046 import javax.swing.JSeparator; 047 import javax.swing.SwingUtilities; 048 import javax.swing.UIManager; 049 import javax.swing.plaf.ComponentUI; 050 import javax.swing.plaf.basic.BasicSeparatorUI; 051 052 /** 053 * A UI delegate for the {@link JSeparator} component. 054 */ 055 public class MetalSeparatorUI 056 extends BasicSeparatorUI 057 { 058 059 // FIXME: maybe replace by a Map of instances when this becomes stateful 060 /** The shared UI instance for MetalSeparatorUIs */ 061 private static MetalSeparatorUI instance; 062 063 /** 064 * Constructs a new instance of <code>MetalSeparatorUI</code>. 065 */ 066 public MetalSeparatorUI() 067 { 068 super(); 069 } 070 071 /** 072 * Returns a shared instance of <code>MetalSeparatorUI</code>. 073 * 074 * @param component the component for which we return an UI instance 075 * 076 * @return A shared instance of <code>MetalSeparatorUI</code>. 077 */ 078 public static ComponentUI createUI(JComponent component) 079 { 080 if (instance == null) 081 instance = new MetalSeparatorUI(); 082 return instance; 083 } 084 085 /** 086 * The separator is made of two lines. The top line will be 087 * the Metal theme color separatorForeground (or left line if it's vertical). 088 * The bottom or right line will be the Metal theme color 089 * separatorBackground. 090 * The two lines will 091 * be centered inside the bounds box. If the separator is horizontal, 092 * then it will be vertically centered, or if it's vertical, it will 093 * be horizontally centered. 094 * 095 * @param g The Graphics object to paint with 096 * @param c The JComponent to paint. 097 */ 098 public void paint(Graphics g, JComponent c) 099 { 100 Rectangle r = new Rectangle(); 101 SwingUtilities.calculateInnerArea(c, r); 102 Color saved = g.getColor(); 103 Color c1 = UIManager.getColor("Separator.foreground"); 104 Color c2 = UIManager.getColor("Separator.background"); 105 JSeparator s; 106 if (c instanceof JSeparator) 107 s = (JSeparator) c; 108 else 109 return; 110 111 if (s.getOrientation() == JSeparator.HORIZONTAL) 112 { 113 int midAB = r.height / 2; 114 g.setColor(c1); 115 g.drawLine(r.x, r.y + midAB - 1, r.x + r.width, r.y + midAB - 1); 116 117 g.setColor(c2); 118 g.fillRect(r.x, r.y + midAB, r.x + r.width, r.y + midAB); 119 } 120 else 121 { 122 int midAD = r.height / 2 + r.y; 123 g.setColor(c1); 124 g.drawLine(r.x, r.y, r.x, r.y + r.height); 125 126 g.setColor(c2); 127 g.fillRect(r.x + midAD, r.y + r.height, r.x + midAD, r.y + r.height); 128 } 129 g.setColor(saved); 130 } 131 }