When I hover over a grid group header the tooltip that pops up displays over the entire width of my monitor. Is there a way to limit this? What type of UIElement is a grid group header?
There is no publicly exposed way to constrain the width of the tooltip, but you could hack around this using a creation filter...in order to make sure this would work I had to implement it so I attached it here. Assign an instance of this class to the grid's CreationFilter property; what it does is replace the element's IToolTipItem implementation with something that sets the tooltip's maximum width.