How to use HasRenderLoop

[charlenni]

If I use a SKGLView in SkiaSharp.Forms, then I have to set HasRenderLoop to true. If I don't do this, I don't get an image, even if I call InvalidateSurface().

Ideally I would like to draw the canvas once and then wait until an event occurs, that needs a redrawn of the canvas. I thought, that this would be possible with HasRenderLoop set to false.

So any help or information about flag HasRenderLoop?

[mattleibow]

That sounds like a bug. What platform is this?

Typically, if you don't have a render loop, it should still render on size changes and when you manually call invalidate.

What version is this and can you attach a repro? Not rendering at all sounds very strange.

[charlenni]

Thank you for looking into this.

The used version is 2.80.2

I only have the whole project. You could find it here. The HasRenderLoop setting could be found at VTMapView.cs in project VTMap.View.Forms on line 28. Start it on UWP with HasRenderLoop set to true to see the normal behavior. Then change to false. Nothing is drawn than.