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/ColorCellEditor.java
/**
	 * The default extent in pixels.
	 */
	private static final int DEFAULT_EXTENT= 16;
	
	/**
	 * Gap between between image and text in pixels.
	 */	 	
	private static final int GAP = 6;
	/**
	 * The composite widget containing the color and RGB label widgets
	 */
	private Composite composite;
	/**
	 * The label widget showing the current color.
	 */
	private Label colorLabel;
	/**
	 * The label widget showing the RGB values.
	 */
	private Label rgbLabel;
	/**
	 * The image.
	 */
	private Image image;
	
	/**
	 * Internal class for laying out this cell editor.
	 */
	private class ColorCellLayout extends Layout {