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/CellEditor.java
* </p>
 * <p>
 * Subclasses may override
 * </p>
 * @return <code>true</code> if cut is possible,
 *  <code>false</code> otherwise
 */
public boolean isCutEnabled() {
	return false;
}
/**
 * Returns <code>true</code> if this cell editor is
 * able to perform the delete action.
 * <p>
 * This default implementation always returns 
 * <code>false</code>.
 * </p>
 * <p>
 * Subclasses may override
 * </p>
 * @return <code>true</code> if delete is possible,
 *  <code>false</code> otherwise
 */
public boolean isDeleteEnabled() {
	return false;
}
/**
 * Returns whether the value of this cell editor has changed since the
 * last call to <code>setValue</code>.
 *