Question: CanvasControl not updating unless Window is resized. How do I make it update like Win2D CanvasAnimatedControl?

[myokeeh]

I just did my preliminary "upgrade" using upgrade-assistant of a Kiosk UWP with Win2D. It's now in a state that I can run it and most of the code seems to work.

I found another thread here that says CanvasAnimatedControl can be replaced by CanvasControl, however the app now doesn't show what's drawn unless I resize the app window.

As the name implies, maybe that's what sets CanvasAnimatedControl apart from CanvasControl. Is it something that hasn't been ported over?

[DHancock]

Unlike a CanvasAnimatedControl, the CanvasControl doesn't automatically redraw. You need to call CanvasControl.Invalidate() when it's content has changed.

[myokeeh]

@DHancock that's adequate for what I'm doing since I'm not really animating anything--displaying something new every half minute.

[michael-hawker]

@myokeeh can you call CanvasControl.Invalidate then on the SizeChanged event for your parent layout/window?

[myokeeh]

@michael-hawker, I'm doing that every time I draw something now. This particular app is supposed to be a full screen Kiosk app, so it is not allowed to resize. On to tackling getting rid of the title bar and bugging someone about lack of Kiosk mode support with WinUI/WindowsAppSDK.

[michael-hawker]

Oh, sorry I inverted the statement you mentioned about it only drawing when resizing the app vs. not drawing when resizing the app.