I have a GridView in a UWP app that does not contain grouped items. So I can't just put it in a SemanticZoom and have the headers be used as toggles to "zoom out" to a jump list. Instead, I am relying on 1) touch-screen users to pinch-zoom and 2) a command button that toggles the semantic zoom.
The pinch-zoom action works. My jumplist GridView of first letter items is shown and I handle the SemanticZoom's ViewChangeStarted event to scroll to the correct item in the original, zoomed-in GridView.
However, when I use a commandbar button to switch from zoomed-in to zoomed-out using the built-in method ToggleActiveView, it immediately throws an AccessViolationException.
Does anyone know what is going on?
Is it broken because I'm not using grouped items in the zoomed-in list? My zoomed-in gridview datasource is a list of my model items. That's it. For the zoomed-out gridview, I'm using an Linq method that selects the first character in the display name of all of my model items. This is returned as an IEnumerable<IGrouping<string,object>>. Doing it this way allows me to easily get the first item for that letter and scroll to the appropriate item in the zoomed-in list.