Smartmobili.Cocoa.NSView.SetHidden C# (CSharp) Method

        public virtual void SetHidden(bool flag)
        {
            NSView view;

            if (_is_hidden == flag)
                return;

            _is_hidden = flag;

            if (_is_hidden)
            {
                if (_window != null)
                {
                    for (view = (NSView)_window.FirstResponder;
                         view != null && view.RespondsToSelector(new SEL("superview"));
                         view = (NSView)view.Superview)
                    {
                        if (view == this)
                        {
                            //_window.MakeFirstResponder(this.NextValidKeyView());
                            break;
                        }
                    }
                }
                if (_rFlags.has_draginfo != 0)
                {
                    if (_window != null)
                    {
                        //NSArray t = GSGetDragTypes(self);
                        //[GSDisplayServer removeDragTypes: t fromWindow: _window];
                    }
                }
                if (Superview != null)
                    ((NSView)this.Superview).SetNeedsDisplay(true);
            }
            else
            {
                if (_rFlags.has_draginfo != 0)
                {
                    if (_window != null)
                    {
                        //NSArray t = GSGetDragTypes(this);

                        //[GSDisplayServer addDragTypes: t toWindow: _window];
                    }
                }
                if (_rFlags.has_subviews != 0)
                {
                    // The _visibleRect of subviews will be NSZeroRect, because when they
                    // were calculated in -[_rebuildCoordinates], they were intersected
                    // with the result of calling -[visibleRect] on the hidden superview,
                    // which returns NSZeroRect for hidden views.
                    //
                    // So, recalculate the subview coordinates now to make them correct.

                    //[_sub_views makeObjectsPerformSelector: @selector(_invalidateCoordinates)];
                }
                this.SetNeedsDisplay(true);
            }
        }