001 /*
002 * $Id: TableCellContext.java 3424 2009-07-30 10:53:39Z kleopatra $
003 *
004 * Copyright 2008 Sun Microsystems, Inc., 4150 Network Circle,
005 * Santa Clara, California 95054, U.S.A. All rights reserved.
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
020 */
021 package org.jdesktop.swingx.renderer;
022
023 import java.awt.Color;
024
025 import javax.swing.JTable;
026
027 /**
028 * Table specific <code>CellContext</code>.
029 */
030 public class TableCellContext extends CellContext {
031
032 /**
033 * Sets state of the cell's context. Note that the component might be null
034 * to indicate a cell without a concrete context. All accessors must cope
035 * with.
036 *
037 * @param component the component the cell resides on, might be null
038 * @param value the content value of the cell
039 * @param row the cell's row index in view coordinates
040 * @param column the cell's column index in view coordinates
041 * @param selected the cell's selected state
042 * @param focused the cell's focused state
043 * @param expanded the cell's expanded state
044 * @param leaf the cell's leaf state
045 */
046 public void installContext(JTable component, Object value, int row, int column,
047 boolean selected, boolean focused, boolean expanded, boolean leaf) {
048 this.component = component;
049 installState(value, row, column, selected, focused, expanded, leaf);
050 this.dropOn = checkDropOnState();
051 }
052
053
054 /**
055 *
056 */
057 private boolean checkDropOnState() {
058 if ((getComponent() == null) || !isValidRow() || !isValidColumn()) {
059 return false;
060 }
061 JTable.DropLocation dropLocation = getComponent().getDropLocation();
062 if (dropLocation != null
063 && !dropLocation.isInsertRow()
064 && !dropLocation.isInsertColumn()
065 && dropLocation.getRow() == row
066 && dropLocation.getColumn() == column) {
067 return true;
068 }
069 return false;
070 }
071
072
073 @Override
074 public JTable getComponent() {
075 return (JTable) super.getComponent();
076 }
077
078 /**
079 * Returns the cell's editable property as returned by table.isCellEditable
080 * or false if the table is null.
081 *
082 * @return the cell's editable property.
083 */
084 @Override
085 public boolean isEditable() {
086 if ((getComponent() == null) || !isValidRow() || !isValidColumn()) {
087 return false;
088 }
089 return getComponent().isCellEditable(getRow(), getColumn());
090 }
091
092
093
094 /**
095 * {@inheritDoc}
096 */
097 @Override
098 protected Color getSelectionBackground() {
099 Color selection = null;
100 if (isDropOn()) {
101 selection = getDropCellBackground();
102 if (selection != null) return selection;
103 }
104 return getComponent() != null ? getComponent()
105 .getSelectionBackground() : null;
106 }
107
108 /**
109 * {@inheritDoc}
110 */
111 @Override
112 protected Color getSelectionForeground() {
113 Color selection = null;
114 if (isDropOn()) {
115 selection = getDropCellForeground();
116 if (selection != null) return selection;
117 }
118 return getComponent() != null ? getComponent()
119 .getSelectionForeground() : null;
120 }
121
122 /**
123 * {@inheritDoc}
124 */
125 @Override
126 protected String getUIPrefix() {
127 return "Table.";
128 }
129
130 /**
131 * PRE getComponent != null
132 *
133 * @return whether the column coordinate is valid in this context
134 */
135 protected boolean isValidColumn() {
136 return getColumn() >= 0 && getColumn() < getComponent().getColumnCount() ;
137 }
138
139 /**
140 * PRE getComponent != null
141 *
142 * @return whether the row coordinate is valid in this context
143 */
144 protected boolean isValidRow() {
145 return getRow() >= 0 && getRow() < getComponent().getRowCount() ;
146 }
147
148
149 }