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> method returns <code>true</code> if 
 * the current selection is not empty.
 */
public boolean isCutEnabled() {
	if (text == null || text.isDisposed())
		return false;
	return text.getSelectionCount() > 0;
}
/**
 * The <code>TextCellEditor</code>  implementation of this 
 * <code>CellEditor</code> method returns <code>true</code>
 * if there is a selection or if the caret is not positioned 
 * at the end of the text.
 */
public boolean isDeleteEnabled() {
	if (text == null || text.isDisposed())
		return false;
	return text.getSelectionCount() > 0 || text.getCaretPosition() < text.getCharCount();
}
/**
 * The <code>TextCellEditor</code>  implementation of this 
 * <code>CellEditor</code> method always returns <code>true</code>.
 */
public boolean isPasteEnabled() {
	if (text == null || text.isDisposed())
		return false;
	return true;
}
/**