FReply FSceneViewport::OnMouseButtonDown( const FGeometry& InGeometry, const FPointerEvent& InMouseEvent )
{
// Start a new reply state
// Prevent throttling when interacting with the viewport so we can move around in it
CurrentReplyState = FReply::Handled().PreventThrottling();
KeyStateMap.Add(InMouseEvent.GetEffectingButton(), true);
UpdateModifierKeys( InMouseEvent );
UpdateCachedMousePos( InGeometry, InMouseEvent );
UpdateCachedGeometry(InGeometry);
// Switch to the viewport clients world before processing input
FScopedConditionalWorldSwitcher WorldSwitcher( ViewportClient );
if( ViewportClient && GetSizeXY() != FIntPoint::ZeroValue )
{
// If we're obtaining focus, we have to copy the modifier key states prior to processing this mouse button event, as this is the only point at which the mouse down
// event is processed when focus initially changes and the modifier keys need to be in-place to detect any unique drag-like events.
if ( !HasFocus() )
{
FModifierKeysState KeysState = FSlateApplication::Get().GetModifierKeys();
ApplyModifierKeys( KeysState );
}
// Process the mouse event
if( !ViewportClient->InputKey( this, 0, InMouseEvent.GetEffectingButton(), IE_Pressed ) )
{
CurrentReplyState = FReply::Unhandled();
}
if (ViewportClient->CaptureMouseOnClick() != EMouseCaptureMode::NoCapture && !ViewportClient->IgnoreInput())
{
TSharedRef<SViewport> ViewportWidgetRef = ViewportWidget.Pin().ToSharedRef();
// Mouse down should focus viewport for keyboard input
CurrentReplyState.SetKeyboardFocus(ViewportWidgetRef, EKeyboardFocusCause::Mouse);
UWorld* World = ViewportClient->GetWorld();
if (World && World->IsGameWorld() && World->GetFirstPlayerController())
{
CurrentReplyState.CaptureMouse(ViewportWidgetRef);
CurrentReplyState.LockMouseToWidget(ViewportWidgetRef);
bool bShouldShowMouseCursor = World->GetFirstPlayerController()->ShouldShowMouseCursor();
if (ViewportClient->HideCursorDuringCapture() && bShouldShowMouseCursor)
{
bCursorHiddenDueToCapture = true;
}
if (bCursorHiddenDueToCapture || !bShouldShowMouseCursor)
{
CurrentReplyState.UseHighPrecisionMouseMovement(ViewportWidgetRef);
}
}
else
{
CurrentReplyState.UseHighPrecisionMouseMovement(ViewportWidgetRef);
}
}
}
// Re-set prevent throttling here as it can get reset when inside of InputKey()
CurrentReplyState.PreventThrottling();
return CurrentReplyState;
}
FReply FSceneViewport::OnMouseButtonDown( const FGeometry& InGeometry, const FPointerEvent& InMouseEvent )
{
// Start a new reply state
// Prevent throttling when interacting with the viewport so we can move around in it
CurrentReplyState = FReply::Handled().PreventThrottling();
KeyStateMap.Add(InMouseEvent.GetEffectingButton(), true);
UpdateModifierKeys( InMouseEvent );
UpdateCachedMousePos( InGeometry, InMouseEvent );
UpdateCachedGeometry(InGeometry);
// Switch to the viewport clients world before processing input
FScopedConditionalWorldSwitcher WorldSwitcher( ViewportClient );
if( ViewportClient && GetSizeXY() != FIntPoint::ZeroValue )
{
// If we're obtaining focus, we have to copy the modifier key states prior to processing this mouse button event, as this is the only point at which the mouse down
// event is processed when focus initially changes and the modifier keys need to be in-place to detect any unique drag-like events.
if ( !HasFocus() )
{
FModifierKeysState KeysState = FSlateApplication::Get().GetModifierKeys();
ApplyModifierKeys( KeysState );
}
const bool bAnyMenuWasVisible = FSlateApplication::Get().AnyMenusVisible();
// Process the mouse event
if (!ViewportClient->InputKey(this, InMouseEvent.GetUserIndex(), InMouseEvent.GetEffectingButton(), IE_Pressed))
{
CurrentReplyState = FReply::Unhandled();
}
// a new menu was opened if there was previously not a menu visible but now there is
const bool bNewMenuWasOpened = !bAnyMenuWasVisible && FSlateApplication::Get().AnyMenusVisible();
if (!ViewportClient->IgnoreInput() &&
!bNewMenuWasOpened && // We should not focus the viewport if a menu was opened as it would close the menu
( ViewportClient->CaptureMouseOnClick() == EMouseCaptureMode::CapturePermanently ||
ViewportClient->CaptureMouseOnClick() == EMouseCaptureMode::CaptureDuringMouseDown ||
( ViewportClient->CaptureMouseOnClick() == EMouseCaptureMode::CaptureDuringRightMouseDown && InMouseEvent.GetEffectingButton() == EKeys::RightMouseButton ) ) )
{
TSharedRef<SViewport> ViewportWidgetRef = ViewportWidget.Pin().ToSharedRef();
// Mouse down should focus viewport for user input
CurrentReplyState.SetUserFocus(ViewportWidgetRef, EFocusCause::SetDirectly, true);
UWorld* World = ViewportClient->GetWorld();
if (World && World->IsGameWorld() && World->GetFirstPlayerController())
{
CurrentReplyState.CaptureMouse(ViewportWidgetRef);
CurrentReplyState.LockMouseToWidget(ViewportWidgetRef);
bool bShouldShowMouseCursor = World->GetFirstPlayerController()->ShouldShowMouseCursor();
if (ViewportClient->HideCursorDuringCapture() && bShouldShowMouseCursor)
{
bCursorHiddenDueToCapture = true;
MousePosBeforeHiddenDueToCapture = FIntPoint( InMouseEvent.GetScreenSpacePosition().X, InMouseEvent.GetScreenSpacePosition().Y );
}
if (bCursorHiddenDueToCapture || !bShouldShowMouseCursor)
{
CurrentReplyState.UseHighPrecisionMouseMovement(ViewportWidgetRef);
}
}
else
{
CurrentReplyState.UseHighPrecisionMouseMovement(ViewportWidgetRef);
}
}
}
// Re-set prevent throttling here as it can get reset when inside of InputKey()
CurrentReplyState.PreventThrottling();
return CurrentReplyState;
}
