Much work on input mode switching

Source/Integration/PlayerControllerBase.h

@@ -3,6 +3,7 @@
 #include "CoreMinimal.h"
 #include "Engine/HitResult.h"
 #include "GameFramework/PlayerController.h"
+#include "InputEvents.h"
 #include "PlayerControllerBase.generated.h"
 
 UCLASS(BlueprintType, Blueprintable)
@@ -36,16 +37,35 @@ public:
 	// Called by GameMode each tick.
 	void UpdateLookAt();
 
+	// Called by GameMode each tick. GCs dead requests and will
+	// eventually reconcile focus, pointer, and capture state.
+	void UpdateInputMode();
+
 	// Input stack overrides: unsorted, append-on-push.
 	virtual void PushInputComponent(UInputComponent* InInputComponent) override;
 	virtual bool PopInputComponent(UInputComponent* InInputComponent) override;
 	virtual void BuildInputStack(TArray<UInputComponent*>& InputStack) override;
 
+	// Read UUserWidget::InputComponent via reflection. The field is
+	// protected and has no public accessor; this reaches through the
+	// FProperty so we always see the current value without caching it.
+	static class UInputComponent* GetWidgetInputComponent(class UUserWidget *Widget);
+
+	// Blueprint-facing entry point. Looks like a method on UUserWidget
+	// (thanks to DefaultToSelf + HideSelfPin): the widget self-binds,
+	// we find its owning PlayerController, and register the request.
+	UFUNCTION(BlueprintCallable, Category = "Luprex|Input Mode",
+		meta = (DefaultToSelf = "Widget", HideSelfPin = "true"))
+	static void WidgetRequestInputMode(class UUserWidget *Widget, bool ShowPointer, bool BlockInput, class UWidget *Focus);
+
 	// Get the player controller, cast to AlxPlayerControllerBase.
 	static AlxPlayerControllerBase *FromContext(const UObject *Context);
 
 	UPROPERTY()
 	FHitResult CurrentLookAt;
 
+	UPROPERTY()
+	FlxInputModeRequests InputModeRequests;
+
 	bool MustCallLookAtChanged = false;
 };