When i press Slate Button, scene stops.

I created default level, i added widget (Button) with GEngine->GetGameViewportWidget()->SetContent(SNew(SMyButtonWidget)).

When i launch game in editor, and press button (not click, i.e. LMB down, without up), then Skyes stop movement, scene become fixed. When i release button, then scene continues movement.

I thought Slate widgets does not affect Scene/Draw, i really expect that, i really need my scene always move, even when i press buttons etc. Is it a bug?

UE4.4.1

That happens only inside Editor PIE. In standalone application everything seems ok.

You use wrong method adding your button. Your code should be like this:

TSharedRef<SMyButtonWidget> MyButton = SNew(SMyButtonWidget);

if (GEngine && GEngine->GameViewport)
{
	GEngine->GameViewport->AddViewportWidgetContent(
		SNew(SWeakWidget)
		.PossiblyNullContent(MyButton)
		);
}

i will try thx