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1: /* MetalScrollBarUI.java 2: Copyright (C) 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package javax.swing.plaf.metal; 40: 41: import java.awt.Dimension; 42: import java.awt.Graphics; 43: import java.awt.Rectangle; 44: import java.util.HashMap; 45: 46: import javax.swing.JComponent; 47: import javax.swing.UIDefaults; 48: import javax.swing.UIManager; 49: import javax.swing.plaf.ComponentUI; 50: import javax.swing.plaf.basic.BasicScrollBarUI; 51: 52: public class MetalScrollBarUI 53: extends BasicScrollBarUI 54: { 55: 56: /** The minimum thumb size */ 57: private static final Dimension MIN_THUMB_SIZE = new Dimension(18, 18); 58: 59: // FIXME: maybe replace by a Map of instances when this becomes stateful 60: /** The shared UI instance for JScrollBars. */ 61: private static HashMap instances = null; 62: 63: /** 64: * Constructs a new instance of MetalScrollBarUI. 65: */ 66: public MetalScrollBarUI() 67: { 68: super(); 69: } 70: 71: /** 72: * Returns an instance of MetalScrollBarUI. 73: * 74: * @param component the component for which we return an UI instance 75: * 76: * @return an instance of MetalScrollBarUI 77: */ 78: public static ComponentUI createUI(JComponent component) 79: { 80: if (instances == null) 81: instances = new HashMap(); 82: 83: Object o = instances.get(component); 84: MetalScrollBarUI instance; 85: if (o == null) 86: { 87: instance = new MetalScrollBarUI(); 88: instances.put(component, instance); 89: } 90: else 91: instance = (MetalScrollBarUI) o; 92: 93: return instance; 94: } 95: 96: /** 97: * Paints the slider button of the ScrollBar. 98: * 99: * @param g the Graphics context to use 100: * @param c the JComponent on which we paint 101: * @param thumbBounds the rectangle that is the slider button 102: */ 103: protected void paintThumb(Graphics g, JComponent c, Rectangle thumbBounds) 104: { 105: // first we fill the background 106: g.setColor(thumbColor); 107: g.fillRect(thumbBounds.x, thumbBounds.y, thumbBounds.width, 108: thumbBounds.height); 109: 110: // draw the outer dark line 111: g.setColor(thumbDarkShadowColor); 112: g.drawRect(thumbBounds.x, thumbBounds.y, thumbBounds.width - 1, 113: thumbBounds.height - 1); 114: 115: // draw the inner light line 116: g.setColor(thumbHighlightColor); 117: g.drawLine(thumbBounds.x + 1, thumbBounds.y + 1, 118: thumbBounds.x + thumbBounds.width - 2, 119: thumbBounds.y + 1); 120: g.drawLine(thumbBounds.x + 1, thumbBounds.y + 1, 121: thumbBounds.x + 1, 122: thumbBounds.y + thumbBounds.height - 2); 123: 124: // draw the shadow line 125: UIDefaults def = UIManager.getLookAndFeelDefaults(); 126: g.setColor(def.getColor("ScrollBar.shadow")); 127: g.drawLine(thumbBounds.x + 1, thumbBounds.y + thumbBounds.height, 128: thumbBounds.x + thumbBounds.width, 129: thumbBounds.y + thumbBounds.height); 130: 131: // draw the pattern 132: MetalUtils.fillMetalPattern(g, thumbBounds.x + 3, thumbBounds.y + 3, 133: thumbBounds.width - 6, thumbBounds.height - 6, 134: thumbHighlightColor, thumbDarkShadowColor); 135: } 136: 137: /** 138: * This method returns the minimum thumb size. 139: * 140: * @return The minimum thumb size. 141: */ 142: protected Dimension getMinimumThumbSize() 143: { 144: return MIN_THUMB_SIZE; 145: } 146: }
GNU Classpath (0.17) |