01: // ============================================================================
02: // $Id: ComponentRenderer.java,v 1.2 2005/08/14 20:27:30 davidahall Exp $
03: // Copyright (c) 2005 David A. Hall
04: // ============================================================================
05: // The contents of this file are subject to the Common Development and
06: // Distribution License (CDDL), Version 1.0 (the License); you may not use this
07: // file except in compliance with the License. You should have received a copy
08: // of the the License along with this file: if not, a copy of the License is
09: // available from Sun Microsystems, Inc.
10: //
11: // http://www.sun.com/cddl/cddl.html
12: //
13: // From time to time, the license steward (initially Sun Microsystems, Inc.) may
14: // publish revised and/or new versions of the License. You may not use,
15: // distribute, or otherwise make this file available under subsequent versions
16: // of the License.
17: //
18: // Alternatively, the contents of this file may be used under the terms of the
19: // GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
20: // case the provisions of the LGPL are applicable instead of those above. If you
21: // wish to allow use of your version of this file only under the terms of the
22: // LGPL, and not to allow others to use your version of this file under the
23: // terms of the CDDL, indicate your decision by deleting the provisions above
24: // and replace them with the notice and other provisions required by the LGPL.
25: // If you do not delete the provisions above, a recipient may use your version
26: // of this file under the terms of either the CDDL or the LGPL.
27: //
28: // This library is distributed in the hope that it will be useful,
29: // but WITHOUT ANY WARRANTY; without even the implied warranty of
30: // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
31: // ============================================================================
32:
33: package net.sf.jga.swing.spreadsheet;
34:
35: import java.awt.Component;
36: import javax.swing.JComponent;
37: import javax.swing.JTable;
38: import javax.swing.table.DefaultTableCellRenderer;
39: import javax.swing.table.TableCellRenderer;
40:
41: /**
42: * TableCellRenderer used when the contents of the cell are a JComponent. The
43: * component itself will be used as the rendering component.
44: * <p>
45: * Copyright © 2005 David A. Hall
46: */
47:
48: public class ComponentRenderer extends DefaultTableCellRenderer
49: implements TableCellRenderer {
50:
51: static final long serialVersionUID = -700135148337938417L;
52:
53: // default instance for general usage
54: static private ComponentRenderer _instance;
55:
56: /**
57: * Returns a sharable ComponentRenderer instance.
58: */
59: static public synchronized ComponentRenderer getInstance() {
60: if (_instance == null)
61: _instance = new ComponentRenderer();
62:
63: return _instance;
64: }
65:
66: public ComponentRenderer() {
67: }
68:
69: // --------------------------------
70: // TableCellRenderer Implementation
71: // --------------------------------
72:
73: /**
74: * Returns the Component that is stored in the table at the designated cell.
75: */
76: public Component getTableCellRendererComponent(JTable table,
77: Object object, boolean isSelected, boolean hasFocus,
78: int row, int col) {
79: if (object instanceof JComponent) {
80: return (JComponent) object;
81: }
82:
83: // Rather than throw an exception because we're used improperly,
84: // fall back to default table behaviour.
85: return super.getTableCellRendererComponent(table, object,
86: isSelected, hasFocus, row, col);
87: }
88: }
|