SetMousePosition doesn't work at BeginPlay()

[cave_zf_586]

Hi guys, a problem I encounterd is very werid.
In the very begining of the game, I wish that the mouse cursor would appear which be located in center of screen.
But actually its location is not what I wished…

Here my codes… very simple codes… but it seems to does not work accurately…

void ADMCPlayerController::BeginPlay()
{
	Super::BeginPlay();
	
	FIntPoint viewSize = GEngine->GameViewport->Viewport->GetSizeXY();
	SetMouseLocation(viewSize.X / 2, viewSize.Y / 2);

	UE_LOG(LogTemp, Warning, TEXT("%s"), *viewSize.ToString());
}

The follow image illustrate where the cursor is after the codes executed:

PS: As you may have suspected, the output of the UE_LOG is very correct…

[Mellnik]

Same problem here.

[Shaggy41]

Hello,

it looks like the window position information is not yet updated in BeginPlay(). Therefore, the cursor position is set relative to the window position (0, 0).

I resolved this by creating a timer that after Wait calls the OnTimer_Cursor().

DMCPlayerController.h

void OnTimer_Cursor();

FTimerHandle CursorTimerHandle;

DMCPlayerController.cpp

#include "TimerManager.h"

ADMCPlayerController::ADMCPlayerController()
	:Super::APlayerController()
{
	bShowMouseCursor = true;
}

void ADMCPlayerController::BeginPlay()
{
	Super::BeginPlay();
	
	//OnTimer_Cursor();
	float Wait = 0.01f;

	GetWorld()->GetTimerManager().SetTimer(CursorTimerHandle, this, &ADMCPlayerController::OnTimer_Cursor, Wait, false);
}

void ADMCPlayerController::OnTimer_Cursor()
{
	FIntPoint viewSize = GEngine->GameViewport->Viewport->GetSizeXY();

	SetMouseLocation(viewSize.X / 2, viewSize.Y / 2);
}

It also worked when I set Wait for 0.00000001.