javax.swing.table.DefaultTableCellRenderer#getTableCellRendererComponent ( )源码实例Demo

/**
 * Returns the baseline.
 *
 * @throws NullPointerException     {@inheritDoc}
 * @throws IllegalArgumentException {@inheritDoc}
 * @see                             javax.swing.JComponent#getBaseline(int, int)
 * @since                           1.6
 */
public int getBaseline(final JComponent c, final int width, final int height) {
    super.getBaseline(c, width, height);
    UIDefaults lafDefaults = UIManager.getLookAndFeelDefaults();
    Component renderer = (Component) lafDefaults.get(BASELINE_COMPONENT_KEY);
    if (renderer == null) {
        DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();
        renderer = tcr.getTableCellRendererComponent(table, "a", false, false, -1, -1);
        lafDefaults.put(BASELINE_COMPONENT_KEY, renderer);
    }
    renderer.setFont(table.getFont());
    int rowMargin = table.getRowMargin();
    return renderer.getBaseline(Integer.MAX_VALUE, table.getRowHeight() -
                                                   rowMargin)
           + rowMargin / 2;
}
 

@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
    Component c = renderer.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
    JLabel l = (JLabel) c;
    double v = (Double) value;
    if (unit.equals(UnknownUnit.getSingleton())) {
        l.setText(nf.format(value));
    } else {
        double speedInMinutes = v * unit.getSpeed();
        l.setText(DSCalculator.formatTimeInMinutes(speedInMinutes));
    }

    Color col = null;
    if (v <= markerMin) {
        col = ColorGradientHelper.getGradientColor(100f, Color.RED, Color.GREEN);
    } else if ((v > markerMin) && (v < markerMax)) {
        double range = markerMax - markerMin;
        double val = v - markerMin;
        col = ColorGradientHelper.getGradientColor((float) (100.0 - (100.0 * val / range)), Color.RED, Color.GREEN);
    } else if (v >= markerMax) {
        col = ColorGradientHelper.getGradientColor(0f, Color.RED, Color.GREEN);
    }
    c.setBackground(col);
    return c;
}
 

@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
	DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
	Component c = renderer.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
	if (value instanceof Double) {
		String s = NumFormat.nice(((Double) value).doubleValue());
		c = renderer.getTableCellRendererComponent(table, s, isSelected, hasFocus, row, col);
		((JLabel) c).setHorizontalAlignment(SwingConstants.RIGHT);
	}
	return c;
}
 

/**
 * Sets an initial <code>value</code> for the editor.  This will cause the editor to <code>stopEditing</code>
 * and lose any partially edited value if the editor is editing when this method is called. <p>
 * <p>
 * Returns the component that should be added to the client's <code>Component</code> hierarchy.  Once installed
 * in the client's hierarchy this component will then be able to draw and receive user input.
 *
 * @param table      the <code>JTable</code> that is asking the editor to edit; can be <code>null</code>
 * @param value      the value of the cell to be edited; it is up to the specific editor to interpret and draw the
 *                   value.  For example, if value is the string "true", it could be rendered as a string or it could be rendered
 *                   as a check box that is checked.  <code>null</code> is a valid value
 * @param isSelected true if the cell is to be rendered with highlighting
 * @param row        the row of the cell being edited
 * @param column     the column of the cell being edited
 * @return the component for editing
 */
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row,
                                             int column) {
    final JPanel renderPanel = new JPanel(new BorderLayout());
    final DefaultTableCellRenderer defaultRenderer = new DefaultTableCellRenderer();
    final Component label = defaultRenderer.getTableCellRendererComponent(table, value, isSelected,
                                                                          false, row, column);
    renderPanel.add(label);
    renderPanel.add(button, BorderLayout.EAST);
    this.value[0] = (String) value;
    return renderPanel;
}