1 
 2 package com.vizitsolutions.identitytable;
 3 
 4 import java.awt.event.ComponentAdapter;
 5 import java.awt.event.ComponentEvent;
 6 import java.awt.Dimension;
 7 import javax.swing.JScrollPane;
 8 import javax.swing.JTable;
 9 import javax.swing.JViewport;
10 
11 /**
12  * <p>$Id: $</p>
13  * <p>
14  * Listen for resizes of the row header table's header, then resize the
15  * containing viewport. These resize events happen when the user drags the
16  * row header's column header to resize the row header columns.
17  * </p>
18  * @author  Alex Kluge
19  * @version $Revision: $, $Date: $
20  */
21 public class RowHeaderResizeListener extends ComponentAdapter
22 {
23     private JScrollPane  identityTable;
24     private JTable       mainTable;
25     private JTable       rowHeaderTable;
26     private JViewport    rowHeaderView;
27     
28     /**
29      * <p>
30      * Create a RowHeaderResizeListener, which listens for resize events on the
31      * row header part of an IdentityTable. These happen when the user drags to
32      * resize the row header column.
33      * </p>
34      * @param identityTable    A JScrollPane, which has been configured as an
35      *                         IdentityTable, with a rowheader table, and a
36      *                         main table.
37      * 
38      * @param rowHeaderView    A JViewport containing the rowheader. The viewport
39      *                         is the component through only a section of the
40      *                         rowheader is visible.
41      *                      
42      * @param rowHeaderTable   A JTable containing the row header columns.
43      * @param mainTable        A JTable containing the main data columns. This
44      *                         table must be resized whenever the rowHeaderTable
45      *                         resizes.
46      * 
47      * @see com.vizitsolutions.identitytable.IdentityTable
48      */
49     public RowHeaderResizeListener(JScrollPane identityTable,  JViewport rowHeaderView,
50                                    JTable      rowHeaderTable, JTable    mainTable)
51     {
52         this.identityTable  = identityTable;
53         this.rowHeaderView  = rowHeaderView;
54         this.rowHeaderTable = rowHeaderTable;
55         this.mainTable      = mainTable;
56     }
57         
58     /**
59      * Called when the rowHeaderTable header is resized. The rowHeaderView
60      * is resized to the appropriate size for the rowHeaderTable, then layout
61      * the main table and finally, call revalidate to trigger a layout of the
62      * containing IdentityTable (JScrollPane).
63      * 
64      * @param e A ComponentEvent, which is ignored because we are only listening
65      *          on the rowheader.
66      */
67     public void componentResized(ComponentEvent e)
68     {
69         Dimension size = rowHeaderView.getPreferredSize();
70         size.width = rowHeaderTable.getWidth();
71         rowHeaderView.setPreferredSize(size);
72         mainTable.doLayout();
73         identityTable.revalidate();
74     }
75 }
76 
77 
78