Investigate: why ViewBuild.Equals returns false, but FuncUI doesn't
manio143 opened this issue · comments
Right now I'm only running updateRoot if my Equals function returned false, which means FuncUI has to see a change and update. But for some reason it doesn't.
See diffAttributes (L117-L122) for where the check occurs. The only implementation of IAttr is Attr<'viewType> which has structural equality. Then we also have default structural for ViewContent, View<'viewType> and others. Content equality works or sure as during debugging I was getting inside nested View<TreeViewItem>. But somehow my change in bool IsSelected isn't picked up.
The issue may very well be somewhere in my code, but I couldn't find it for now. Let's give it a day or two and I'll put some fresh eyes on it. I will create a smaller game test project to check these things.
Turns out the Dispatcher.UIThread.Post(...) is fire and forget. So by the time it invoked the view.UpdateRoot(container, lastView) we already have reassigned lastView = view. I added a capture variable to alleviate this issue.