ue5-ui-umg-slate

Initialize bindings in NativeConstruct and unregister them in NativeDestruct, storing delegate handles when required. Add the widget with AddToViewport and remove it with RemoveFromParent, clearing timers and transient references on teardown.

Use UMG for standard HUD and menu layouts that designers iterate on. Use Slate for custom drawing, dense grid logic, or low-level input handling that UMG cannot express, and use a hybrid bridge when a UWidget host must embed custom Slate content.

Create a UWidget host class that owns a TSharedPtr<SWidget> and constructs the Slate instance in RebuildWidget. Expose Blueprint-callable functions on the host that forward data and configuration to the underlying Slate widget.

This usually means the delegate handle was lost or the widget was recreated without rebinding. Rebind event listeners on every construct, unbind on destruct, and avoid duplicate create/destroy cycles that drop subscriptions.

Compute the desired tooltip position from the anchor or cursor geometry, then clamp the final placement to the viewport bounds from UGameViewportClient::GetViewportSize. Debounce high-frequency hover updates to prevent flicker near screen edges.

Yes, the UMG lifecycle, input mode, and Slate focus APIs used are stable across UE5.6-UE5.8. The workflow recommends Enhanced Input with explicit UI input mode ownership across all supported versions.