javax.swing.JComponent#requestFocus ( )源码实例Demo

private void requestFocus(JComponent comp) {
    Container container = SwingUtilities.getAncestorOfClass(TopComponent.class, comp);
    if (container != null) {
        ((TopComponent)container).requestActive();
    }
    else {
        Component f = comp;
        do {
            f = f.getParent();
            if (f instanceof Frame) {
                break;
            }
        } while (f != null);
        if (f != null) {
            f.requestFocus();
        }
        comp.requestFocus();
    }
}
 

@Override
public void requestActive() {
    super.requestActive();
    JComponent tab = getSelectedTab();
    if (tab != null) {
        tab.requestFocus();
    }
}
 

@Override
   public void requestFocus() {
// redirect focus into terminal
JComponent selected = getSelected();
if (selected != null) {
    selected.requestFocus();
} else {
    super.requestFocus();
}
   }
 

@Override
public Component getTableCellEditorComponent(final JTable table, Object value, boolean isSelected, final int row, final int column) {
    final JComponent c = (JComponent) super.getTableCellEditorComponent(table, value, isSelected, row, column);      
    
    this.tableModel = table.getModel();
    this.columnName = table.getColumnName(column);
    this.modelRow = table.convertRowIndexToModel(row);
    this.modelColumn = table.convertColumnIndexToModel(column);  
    this.tc = c instanceof JTextComponent ? (JTextComponent) c : null;

    JPanel panel = new JPanel(new BorderLayout()) {
        @Override
        public void addNotify() {
            super.addNotify();
            c.requestFocus();
        }
    };
    panel.add(c);
    if (suppressEditorBorder) {
        c.setBorder(BorderFactory.createEmptyBorder());
    }
    panel.add(customEditorButton, BorderLayout.EAST);
    panel.revalidate();
    panel.repaint();

    return panel;
}
 

/**
 * Request focus on the given component if it doesn't already have it
 * and {@code isRequestFocusEnabled()} returns true.
 */
public static void adjustFocus(JComponent c) {
    if (!c.hasFocus() && c.isRequestFocusEnabled()) {
        c.requestFocus();
    }
}