Source for javax.swing.plaf.basic.BasicScrollPaneUI

   1: /* BasicScrollPaneUI.java
   2:    Copyright (C) 2002, 2004, 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.basic;
  40: 
  41: import java.awt.Dimension;
  42: import java.awt.Graphics;
  43: 
  44: import javax.swing.JComponent;
  45: import javax.swing.JScrollPane;
  46: import javax.swing.ScrollPaneConstants;
  47: import javax.swing.ScrollPaneLayout;
  48: import javax.swing.UIDefaults;
  49: import javax.swing.UIManager;
  50: import javax.swing.plaf.ComponentUI;
  51: import javax.swing.plaf.ScrollPaneUI;
  52: 
  53: public class BasicScrollPaneUI extends ScrollPaneUI
  54:   implements ScrollPaneConstants
  55: {
  56: 
  57:   /** The Scrollpane for which the UI is provided by this class. */
  58:   protected JScrollPane scrollpane;
  59: 
  60:   public static ComponentUI createUI(final JComponent c) 
  61:   {
  62:     return new BasicScrollPaneUI();
  63:   }
  64: 
  65:   protected void installDefaults(JScrollPane p)
  66:   {
  67:     scrollpane = p;
  68:     UIDefaults defaults = UIManager.getLookAndFeelDefaults();
  69:     p.setForeground(defaults.getColor("ScrollPane.foreground"));
  70:     p.setBackground(defaults.getColor("ScrollPane.background"));
  71:     p.setFont(defaults.getFont("ScrollPane.font"));
  72:     p.setBorder(defaults.getBorder("ScrollPane.border"));
  73:     p.setOpaque(true);
  74:   }
  75: 
  76:   protected void uninstallDefaults(JScrollPane p)
  77:   {
  78:     p.setForeground(null);
  79:     p.setBackground(null);
  80:     p.setFont(null);
  81:     p.setBorder(null);
  82:     scrollpane = null;
  83:   }
  84:     
  85:   public void installUI(final JComponent c) 
  86:   {
  87:     super.installUI(c);
  88:     this.installDefaults((JScrollPane)c);
  89:   }
  90: 
  91:   public void uninstallUI(final JComponent c) 
  92:   {
  93:     super.uninstallUI(c);
  94:     this.uninstallDefaults((JScrollPane)c);
  95:   }
  96: 
  97:     
  98:   public Dimension getMinimumSize(JComponent c) 
  99:   {
 100:     JScrollPane p = (JScrollPane ) c;
 101:     ScrollPaneLayout sl = (ScrollPaneLayout) p.getLayout();
 102:     return sl.minimumLayoutSize(c);
 103:   }
 104: 
 105:   public Dimension getPreferredSize(JComponent c) 
 106:   {
 107:     JScrollPane p = (JScrollPane ) c;
 108:     ScrollPaneLayout sl = (ScrollPaneLayout) p.getLayout();
 109:     return sl.preferredLayoutSize(c);
 110:   }
 111: 
 112: 
 113:   public void paint(Graphics g, JComponent c)
 114:   {      
 115:     // do nothing; the normal painting-of-children algorithm, along with
 116:     // ScrollPaneLayout, does all the relevant work.
 117:   }
 118: }
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