Draw a solid color block inside a context menu color column.
Inheritance: ViewLeaf
        /// <summary>
        /// Initialize a new instance of the MenuColorBlockController class.
        /// </summary>
        /// <param name="viewManager">Owning view manager instance.</param>
        /// <param name="target">Target for state changes.</param>
        /// <param name="colorBlock">Drawing element that owns color block display.</param>
        /// <param name="needPaint">Delegate for notifying paint requests.</param>
        public MenuColorBlockController(ViewContextMenuManager viewManager,
                                        ViewBase target,
                                        ViewDrawMenuColorBlock colorBlock,
                                        NeedPaintHandler needPaint)
        {
            Debug.Assert(viewManager != null);
            Debug.Assert(target != null);
            Debug.Assert(colorBlock != null);
            Debug.Assert(needPaint != null);

            _viewManager    = viewManager;
            _target         = target;
            _menuColorBlock = colorBlock;
            NeedPaint       = needPaint;

            // Set initial display state
            UpdateTarget();
        }
        /// <summary>
        /// Initialize a new instance of the MenuColorBlockController class.
        /// </summary>
        /// <param name="viewManager">Owning view manager instance.</param>
        /// <param name="target">Target for state changes.</param>
        /// <param name="colorBlock">Drawing element that owns color block display.</param>
        /// <param name="needPaint">Delegate for notifying paint requests.</param>
        public MenuColorBlockController(ViewContextMenuManager viewManager,
                                        ViewBase target,
                                        ViewDrawMenuColorBlock colorBlock,
                                        NeedPaintHandler needPaint)
        {
            Debug.Assert(viewManager != null);
            Debug.Assert(target != null);
            Debug.Assert(colorBlock != null);
            Debug.Assert(needPaint != null);

            _viewManager = viewManager;
            _target = target;
            _menuColorBlock = colorBlock;
            NeedPaint = needPaint;

            // Set initial display state
            UpdateTarget();
        }