1 
 2 package com.vizitsolutions.identitytable;
 3 
 4 import javax.swing.table.DefaultTableColumnModel;
 5 import javax.swing.JScrollPane;
 6 import javax.swing.JTable;
 7 import javax.swing.table.TableColumn;
 8 import javax.swing.table.TableColumnModel;
 9 
10 /**
11  * <p>$Id$</p>
12  *
13  * <p>
14  * This class maps a TableModel into two JTables, and places
15  * them into a JScrollPane. The first JTable contains n fixed
16  * columns, and represents what is commonly called a rowheader.
17  * This is placed in the rowheader area of the JScrollPane. These
18  * columns will not scroll horizontally. This is particularly
19  * useful when you have one or more columns that identify an object
20  * and several additional columns that contain attributes of the
21  * object. Placing the identifying columns in these fixed columns
22  * ensures that they are always visible while the attributes of the
23  * object are scrolled into view.
24  * </p>
25  * <p>
26  * The second JTable contains the remaining columns and is placed in
27  * the main viewport and will scroll normally.
28  * </p>
29  *
30  * @author Alex Kluge
31  * @version $Revision$, $Date$
32  */
33 public class IdentityTable1 extends JScrollPane
34 {
35     private JTable           mainTable;
36     private TableColumnModel mainColumnModel      = new DefaultTableColumnModel();
37     private JTable           rowHeaderTable;
38     private TableColumnModel rowHeaderColumnModel = new DefaultTableColumnModel();
39     
40     /**
41      * Creates a new instance of IdentityTable1
42      */
43     public IdentityTable1(IdentityTableModel baseTableModel)
44     {
45         // Start out life as an empty scrollpane.
46         super();
47         
48         // Loop over each of the fixed columns, and create columns in the row
49         // header column model for them.
50         TableColumn column;
51         int         columnCount         = baseTableModel.getColumnCount();
52         int         currentColumn;
53         int         identityColumnCount = baseTableModel.getIdentityColumnCount();
54         
55         for (currentColumn = 0; currentColumn<identityColumnCount; currentColumn++)
56         {
57             column = new TableColumn(currentColumn);
58             column.setHeaderValue(baseTableModel.getColumnName(currentColumn));
59             
60             rowHeaderColumnModel.addColumn(column);
61         }
62         
63         // Now loop over the remaining columns, and add them to the main table's column model.
64         for (currentColumn = identityColumnCount; currentColumn<columnCount; currentColumn++)
65         {
66             column = new TableColumn(currentColumn);
67             column.setHeaderValue(baseTableModel.getColumnName(currentColumn));
68             
69             mainColumnModel.addColumn(column);
70         }
71         
72         // Providing a column model here automatically sets the
73         // autoCreateColumnsFromModel flag to false.
74         rowHeaderTable = new JTable(baseTableModel, rowHeaderColumnModel);
75         rowHeaderTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
76 
77         mainTable      = new JTable(baseTableModel, mainColumnModel);
78         mainTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
79         
80         // Ensure that both tables have common selections.
81         rowHeaderTable.setSelectionModel(mainTable.getSelectionModel());
82         rowHeaderTable.setPreferredScrollableViewportSize(rowHeaderTable.getPreferredSize());
83         
84         setViewportView(mainTable);
85         setRowHeaderView(rowHeaderTable);
86     }
87     
88     public TableColumnModel getMainColumnModel()
89     {
90         return mainColumnModel;
91     }
92     
93     public TableColumnModel getRowHeaderColumnModel()
94     {
95         return rowHeaderColumnModel;
96     }
97 }
98 
99