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.JViewport;
  8 import javax.swing.table.TableColumn;
  9 import javax.swing.table.TableColumnModel;
 10 
 11 /**
 12  * <p>$Id$</p>
 13  *
 14  * <p>
 15  * This class maps a TableModel into two JTables, and places
 16  * them into a JScrollPane. The first JTable contains n fixed
 17  * columns, and represents what is commonly called a rowheader.
 18  * This is placed in the rowheader area of the JScrollPane. These
 19  * columns will not scroll horizontally. This is particularly
 20  * useful when you have one or more columns that identify an object
 21  * and several additional columns that contain attributes of the
 22  * object. Placing the identifying columns in these fixed columns
 23  * ensures that they are always visible while the attributes of the
 24  * object are scrolled into view.
 25  * </p>
 26  * <p>
 27  * The second JTable contains the remaining columns and is placed in
 28  * the main viewport and will scroll normally.
 29  * </p>
 30  *
 31  * @author Alex Kluge
 32  * @version $Revision$, $Date$
 33  */
 34 public class IdentityTable3 extends JScrollPane
 35 {
 36     private JTable           mainTable;
 37     private TableColumnModel mainColumnModel      = new DefaultTableColumnModel();
 38     private JTable           rowHeaderTable;
 39     private TableColumnModel rowHeaderColumnModel = new DefaultTableColumnModel();
 40     
 41     /**
 42      * Creates a new instance of IdentityTable1
 43      */
 44     public IdentityTable3(IdentityTableModel baseTableModel)
 45     {
 46         // Start out life as an empty scrollpane.
 47         super();
 48         
 49         // Loop over each of the fixed columns, and create columns in the row
 50         // header column model for them.
 51         TableColumn column;
 52         int         columnCount         = baseTableModel.getColumnCount();
 53         int         currentColumn;
 54         int         identityColumnCount = baseTableModel.getIdentityColumnCount();
 55         
 56         for (currentColumn = 0; currentColumn<identityColumnCount; currentColumn++)
 57         {
 58             column = new TableColumn(currentColumn);
 59             column.setHeaderValue(baseTableModel.getColumnName(currentColumn));
 60             
 61             rowHeaderColumnModel.addColumn(column);
 62         }
 63         
 64         // Now loop over the remaining columns, and add them to the main table's column model.
 65         for (currentColumn = identityColumnCount; currentColumn<columnCount; currentColumn++)
 66         {
 67             column = new TableColumn(currentColumn);
 68             column.setHeaderValue(baseTableModel.getColumnName(currentColumn));
 69             
 70             mainColumnModel.addColumn(column);
 71         }
 72         
 73         // Providing a column model here automatically sets the
 74         // autoCreateColumnsFromModel flag to false.
 75         rowHeaderTable = new JTable(baseTableModel, rowHeaderColumnModel);
 76         rowHeaderTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
 77 
 78         mainTable      = new JTable(baseTableModel, mainColumnModel);
 79         mainTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
 80         
 81         // Ensure that both tables have common selections.
 82         rowHeaderTable.setSelectionModel(mainTable.getSelectionModel());
 83         rowHeaderTable.setPreferredScrollableViewportSize(rowHeaderTable.getPreferredSize());
 84         
 85         // This puts the column headers in the upper left corner above the row
 86         // header columns. This is the same thing that happens when a JTable configures
 87         // the containing JScrollPane.
 88         setCorner(JScrollPane.UPPER_LEFT_CORNER, rowHeaderTable.getTableHeader());
 89         
 90         JViewport rowHeaderViewPort = new JViewport();
 91         rowHeaderViewPort.setView(rowHeaderTable);
 92         setRowHeader(rowHeaderViewPort);
 93 
 94         // Listen for resize events on the row header, and resize the main table as appropriate.
 95         RowHeaderResizeListener rowHeaderResizeListener = new RowHeaderResizeListener(this,           rowHeaderViewPort,
 96                                                                                       rowHeaderTable, mainTable);
 97         rowHeaderTable.addComponentListener(rowHeaderResizeListener);
 98 
 99         setViewportView(mainTable);
100     }
101     
102     public TableColumnModel getMainColumnModel()
103     {
104         return mainColumnModel;
105     }
106     
107     public TableColumnModel getRowHeaderColumnModel()
108     {
109         return rowHeaderColumnModel;
110     }
111 }
112 
113