FileDocCategorySizeDatePackage
TableRenderDemo.javaAPI DocExample8785Tue Dec 12 18:59:18 GMT 2000None

TableRenderDemo

public class TableRenderDemo extends JFrame

Fields Summary
private boolean
DEBUG
Constructors Summary
public TableRenderDemo()


      
        super("TableRenderDemo");

        MyTableModel myModel = new MyTableModel();
        JTable table = new JTable(myModel);
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));

        //Create the scroll pane and add the table to it. 
        JScrollPane scrollPane = new JScrollPane(table);

        //Set up column sizes.
        initColumnSizes(table, myModel);

        //Fiddle with the Sport column's cell editors/renderers.
        setUpSportColumn(table.getColumnModel().getColumn(2));

        //Add the scroll pane to this window.
        getContentPane().add(scrollPane, BorderLayout.CENTER);

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
Methods Summary
private voidinitColumnSizes(javax.swing.JTable table, TableRenderDemo$MyTableModel model)

        TableColumn column = null;
        Component comp = null;
        int headerWidth = 0;
        int cellWidth = 0;
        Object[] longValues = model.longValues;

        for (int i = 0; i < 5; i++) {
            column = table.getColumnModel().getColumn(i);

            try {
                comp = column.getHeaderRenderer().
                                 getTableCellRendererComponent(
                                     null, column.getHeaderValue(), 
                                     false, false, 0, 0);
                headerWidth = comp.getPreferredSize().width;
            } catch (NullPointerException e) {
                System.err.println("Null pointer exception!");
                System.err.println("  getHeaderRenderer returns null in 1.3.");
                System.err.println("  The replacement is getDefaultRenderer.");
            }

            comp = table.getDefaultRenderer(model.getColumnClass(i)).
                             getTableCellRendererComponent(
                                 table, longValues[i],
                                 false, false, 0, i);
            cellWidth = comp.getPreferredSize().width;

            if (DEBUG) {
                System.out.println("Initializing width of column "
                                   + i + ". "
                                   + "headerWidth = " + headerWidth
                                   + "; cellWidth = " + cellWidth);
            }

            //XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
            column.setPreferredWidth(Math.max(headerWidth, cellWidth));
        }
public static voidmain(java.lang.String[] args)

        TableRenderDemo frame = new TableRenderDemo();
        frame.pack();
        frame.setVisible(true);
public voidsetUpSportColumn(javax.swing.table.TableColumn sportColumn)

        //Set up the editor for the sport cells.
        JComboBox comboBox = new JComboBox();
        comboBox.addItem("Snowboarding");
        comboBox.addItem("Rowing");
        comboBox.addItem("Chasing toddlers");
        comboBox.addItem("Speed reading");
        comboBox.addItem("Teaching high school");
        comboBox.addItem("None");
        sportColumn.setCellEditor(new DefaultCellEditor(comboBox));

        //Set up tool tips for the sport cells.
        DefaultTableCellRenderer renderer =
                new DefaultTableCellRenderer();
        renderer.setToolTipText("Click for combo box");
        sportColumn.setCellRenderer(renderer);

        //Set up tool tip for the sport column header.
        TableCellRenderer headerRenderer = sportColumn.getHeaderRenderer();
        if (headerRenderer instanceof DefaultTableCellRenderer) {
            ((DefaultTableCellRenderer)headerRenderer).setToolTipText(
                     "Click the sport to see a list of choices");
        }