Have a control trigger PointerEnter while holding down left click

[EncryptedData]

I am working on a visual programming like tool in the vein like Unreal Engine's blueprints. I have two ellipses that I want to drag between to connect the nodes, but the PointerEnter doesn't trigger while holding down left click. Is there a way to have this trigger while click and dragging?

[kekekeks]

1. PointerEnter/PointerLeave won't work for touch input
2. We are aware that the current behavior is against the pointer-events spec, but enter/leave won't work for touch input even when we implement it

For now I'd suggest to add

var root = (TopLevel)((IVisual)args.Source).GetVisualRoot();
var rootCoordinates = args.GetPosition(root);
var hitTestResult = root.Renderer.HitTest(rootCoordinates, root, null);

to your PointerMoved event handler to get the list of elements below the pointer and update their classes accordingly.

[EncryptedData]

Hmm that is sad. Anyways, hopefully we can find a solution to that.

For now, after I find the the element in PointerMoved, could I just manually send the PointerEnter/PointerLeave event? The highlight color on the ellipses is a AXAML Style Setter that I would not want to implement in code (if I don't have to).

[EncryptedData]

Also, for now with the tool I am making, the people who would be using it are going to be using Mouse/Keyboard on a desktop. Maybe it should be possible to signal to Avalonia (at least for now) that we want this specific behavior.

[kekekeks]

Hmm that is sad

We've implemented implicit pointer capture for all input device types. We might need to revisit that, but that won't happen at least till Summer.

manually send the PointerEnter/PointerLeave event

I'd suggest to manually set/unset a regular class (e. g. drag-hover) and use that for styling.