Name: stC104175 Date: 05/11/2000


java version "1.3.0rc2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc2-Y)
Java HotSpot(TM) Client VM (build 1.3.0rc2-Y, mixed mode)

I have a JTabbedPane containing a JScrollPane on each of the tabs, and each of
the JScrollPanes contain a JTable. The number of rows on each of the tables
differ. For example: on the first tab there is a table (on a scrollpane) with
one row, on the second tab a table with 4 rows and on the third tab, a table
with 7 rows.

Now when the tabbedPane is created, the first tab is shown correctly. When I
click to see the other tabs with more rows, on each tab only one row is still
shown. The getRowCount method of the TableModel returns 4 and 7, respectively,
but only the first row is painted.

When I am on the second tab and resize the window, the "missing" rows suddenly
appear. After this, the tables are painted correctly each time.

If I do not use scrollpanes and add the tables directly to the tabbedpane, it
works fine.

The example below works the same incorrect way with both JDK1.2.2 and JDK1.3-RC2
(using WinNT 4.0).

import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.TableModelListener;

/**
 * A class containing TAB_COUNT tabs on a JTabbedPane. Each tab contains a
 * JScrollPane with a JTable. On the tables, we want to show a various amount
 * of rows.
 */
class TestFrame extends JFrame implements TableModel {
    
    private final static int TAB_COUNT = 4;
    private final static int MAX_ROW_COUNT = 20;
    private final static int COLUMN_COUNT = 3;
    private static String[][][] tableContents = new String[TAB_COUNT][][];
    private JTabbedPane tabbedPane = new JTabbedPane();
    private JScrollPane scrollPane[] = new JScrollPane[TAB_COUNT];
    private JTable table[] = new JTable[TAB_COUNT];
    private int currentTab = 0;
    
    public static void main(String args[]) {
        new TestFrame("TestFrame");
    }
    
    public TestFrame(String name) {
        
        super(name);
// Remove this row if using JDK1.2
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        // Create a 3-d String array containing values for each cell in each
        // row of each table on each tab...
        for (int i=0; i<TAB_COUNT; i++) {
            tableContents[i] = new String[MAX_ROW_COUNT][];
            for (int j=0; j<MAX_ROW_COUNT; j++) {
                tableContents[i][j] = new String[COLUMN_COUNT];
                for (int k=0; k<COLUMN_COUNT; k++) {
                    tableContents[i][j][k] = String.valueOf(i+j+k);
                }
            }
        }
        
        // Create a scrollPane for each tab and a table for each scrollPane
        for (int i=0; i<TAB_COUNT; i++) {
            table[i] = new JTable(this);
            scrollPane[i] = new JScrollPane();
            scrollPane[i].getViewport().add(table[i]);
            tabbedPane.addTab(String.valueOf(i), scrollPane[i]);
        }
        
        getContentPane().add(tabbedPane);
        setBounds(100, 100, 300, 300);
        setVisible(true);
    }
    
    /*
     * Methods for implementing TableModel interface
     */
    
    public int getColumnCount() {
        return COLUMN_COUNT;
    }
    
    public int getRowCount() {
        int rowCount = 1 + tabbedPane.getSelectedIndex() * 3;
        rowCount = (rowCount > MAX_ROW_COUNT) ? MAX_ROW_COUNT : rowCount;
        System.out.println("RowCount: " + rowCount);
        return rowCount;
    }
    
    public Object getValueAt(int row, int column) {
        System.out.println("getValueAt: Row = " + row);
        return tableContents[tabbedPane.getSelectedIndex()][row][column];
    }
    public void addTableModelListener(TableModelListener l) {}
    public Class getColumnClass(int columnIndex) {return ((String)new
String()).getClass();}
    public String getColumnName(int columnIndex) {return "Test";}
    public boolean isCellEditable(int rowIndex, int columnIndex) {return true;}
    public void removeTableModelListener(TableModelListener l) {}
    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {}
}
(Review ID: 103816)
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