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/TextCellEditor.java
/**
 * The <code>TextCellEditor</code> implementation of
 * this <code>CellEditor</code> framework method returns
 * the text string.
 *
 * @return the text string
 */
protected Object doGetValue() {
	return text.getText();
}
/* (non-Javadoc)
 * Method declared on CellEditor.
 */
protected void doSetFocus() {
	if (text != null) {
		text.selectAll();
		text.setFocus();
		checkSelection();
		checkDeleteable();
		checkSelectable();
	}
}
/**
 * The <code>TextCellEditor</code> implementation of
 * this <code>CellEditor</code> framework method accepts
 * a text string (type <code>String</code>).
 *
 * @param value a text string (type <code>String</code>)
 */
protected void doSetValue(Object value) {