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
text.insert(""); 
		}
	}
	checkSelection(); 
	checkDeleteable();
	checkSelectable();
}
/**
 * The <code>TextCellEditor</code> implementation of this
 * <code>CellEditor</code> method pastes the
 * the clipboard contents over the current selection. 
 */
public void performPaste() {
	text.paste();
	checkSelection(); 
	checkDeleteable();
	checkSelectable();
}
/**
 * The <code>TextCellEditor</code> implementation of this
 * <code>CellEditor</code> method selects all of the
 * current text. 
 */
public void performSelectAll() {
	text.selectAll();
	checkSelection(); 
	checkDeleteable();
}
}