Bug 12329 [Cell Editors] Request:ComboBoxCellEditor READ_ONLY style
Although CCombo accepts SWT.READ_ONLY style, there is no way to specify style when it is used in ComboBoxCellEditor. How about adding createControl(Composite parent, int style) method to ComboBoxCellEditor class?
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/CheckboxCellEditor.java
* The checkbox value.
	 */
	 boolean value = false;
/**
 * Creates a new checkbox cell editor parented under the given control.
 * The cell editor value is a boolean value, which is initially <code>false</code>. 
 * Initially, the cell editor has no cell validator.
 *
 * @param parent the parent control
 */
public CheckboxCellEditor(Composite parent) {
	super(parent);
}
/**
 * The <code>CheckboxCellEditor</code> implementation of
 * this <code>CellEditor</code> framework method simulates
 * the toggling of the checkbox control and notifies
 * listeners with <code>ICellEditorListener.applyEditorValue</code>.
 */
public void activate() {
	value = !value;
	fireApplyEditorValue();
}
/**
 * The <code>CheckboxCellEditor</code> implementation of
 * this <code>CellEditor</code> framework method does
 * nothing and returns <code>null</code>.
 */
protected Control createControl(Composite parent) {
	return null;