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
if (oldIsSelectable != isSelectable) {
		fireEnablementChanged(SELECT_ALL);
	}
}
/**
 * Checks to see if the selection state (selection /
 * no selection) has changed and if so fire an
 * enablement changed notification.
 */
private void checkSelection() {
	boolean oldIsSelection = isSelection;
	isSelection = text.getSelectionCount() > 0;
	if (oldIsSelection != isSelection) {
		fireEnablementChanged(COPY);
		fireEnablementChanged(CUT);
	}
}
/* (non-Javadoc)
 * Method declared on CellEditor.
 */
protected Control createControl(Composite parent) {
	
	
	text = new Text(parent, SWT.SINGLE);
	text.addKeyListener(new KeyAdapter() {
		  
		public void keyPressed(KeyEvent e) {
			keyReleaseOccured(e);