001/* MetalSeparatorUI.java 002 Copyright (C) 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package javax.swing.plaf.metal; 040 041import java.awt.Color; 042import java.awt.Graphics; 043import java.awt.Rectangle; 044 045import javax.swing.JComponent; 046import javax.swing.JSeparator; 047import javax.swing.SwingUtilities; 048import javax.swing.UIManager; 049import javax.swing.plaf.ComponentUI; 050import javax.swing.plaf.basic.BasicSeparatorUI; 051 052/** 053 * A UI delegate for the {@link JSeparator} component. 054 */ 055public 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}