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WinRT: minor code cleanup regarding events 

Some event handling functions got sorted in a somewhat consistent manner, and
in some cases, were also segregated a bit from app-lifecycle code.
This commit is contained in:
David Ludwig 2013-09-06 21:00:52 -04:00
parent 9de76eb526
commit de8d9dbb93
4 changed files with 218 additions and 219 deletions
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136
src/core/winrt/SDL_winrtapp.cpp
View File

@ -299,15 +299,15 @@ void SDL_WinRTApp::SetWindow(CoreWindow^ window)
window->PointerPressed +=
ref new TypedEventHandler<CoreWindow^, PointerEventArgs^>(this, &SDL_WinRTApp::OnPointerPressed);
window->PointerMoved +=
ref new TypedEventHandler<CoreWindow^, PointerEventArgs^>(this, &SDL_WinRTApp::OnPointerMoved);
window->PointerReleased +=
ref new TypedEventHandler<CoreWindow^, PointerEventArgs^>(this, &SDL_WinRTApp::OnPointerReleased);
window->PointerWheelChanged +=
ref new TypedEventHandler<CoreWindow^, PointerEventArgs^>(this, &SDL_WinRTApp::OnPointerWheelChanged);
window->PointerMoved +=
ref new TypedEventHandler<CoreWindow^, PointerEventArgs^>(this, &SDL_WinRTApp::OnPointerMoved);
#if WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
// Retrieves relative-only mouse movements:
Windows::Devices::Input::MouseDevice::GetForCurrentView()->MouseMoved +=
@ -409,71 +409,6 @@ void SDL_WinRTApp::OnWindowClosed(CoreWindow^ sender, CoreWindowEventArgs^ args)
m_windowClosed = true;
}
static void
WINRT_LogPointerEvent(const char * header, Windows::UI::Core::PointerEventArgs ^ args, Windows::Foundation::Point transformedPoint)
{
Windows::UI::Input::PointerPoint ^ pt = args->CurrentPoint;
SDL_Log("%s: Position={%f,%f}, Transformed Pos={%f, %f}, MouseWheelDelta=%d, FrameId=%d, PointerId=%d, SDL button=%d\n",
header,
pt->Position.X, pt->Position.Y,
transformedPoint.X, transformedPoint.Y,
pt->Properties->MouseWheelDelta,
pt->FrameId,
pt->PointerId,
WINRT_GetSDLButtonForPointerPoint(pt));
}
void SDL_WinRTApp::OnPointerPressed(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer pressed", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerPressedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnPointerReleased(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer released", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerReleasedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnPointerWheelChanged(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer wheel changed", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerWheelChangedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnPointerMoved(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer moved", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerMovedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnMouseMoved(MouseDevice^ mouseDevice, MouseEventArgs^ args)
{
WINRT_ProcessMouseMovedEvent(WINRT_GlobalSDLWindow, args);
}
void SDL_WinRTApp::OnKeyDown(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::KeyEventArgs^ args)
{
WINRT_ProcessKeyDownEvent(args);
}
void SDL_WinRTApp::OnKeyUp(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::KeyEventArgs^ args)
{
WINRT_ProcessKeyUpEvent(args);
}
void SDL_WinRTApp::OnActivated(CoreApplicationView^ applicationView, IActivatedEventArgs^ args)
{
CoreWindow::GetForCurrentThread()->Activate();
@ -547,3 +482,68 @@ void SDL_WinRTApp::OnResuming(Platform::Object^ sender, Platform::Object^ args)
SDL_FilterEvents(RemoveAppSuspendAndResumeEvents, 0);
}
}
static void
WINRT_LogPointerEvent(const char * header, Windows::UI::Core::PointerEventArgs ^ args, Windows::Foundation::Point transformedPoint)
{
Windows::UI::Input::PointerPoint ^ pt = args->CurrentPoint;
SDL_Log("%s: Position={%f,%f}, Transformed Pos={%f, %f}, MouseWheelDelta=%d, FrameId=%d, PointerId=%d, SDL button=%d\n",
header,
pt->Position.X, pt->Position.Y,
transformedPoint.X, transformedPoint.Y,
pt->Properties->MouseWheelDelta,
pt->FrameId,
pt->PointerId,
WINRT_GetSDLButtonForPointerPoint(pt));
}
void SDL_WinRTApp::OnPointerPressed(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer pressed", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerPressedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnPointerMoved(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer moved", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerMovedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnPointerReleased(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer released", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerReleasedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnPointerWheelChanged(CoreWindow^ sender, PointerEventArgs^ args)
{
#if LOG_POINTER_EVENTS
WINRT_LogPointerEvent("pointer wheel changed", args, WINRT_TransformCursorPosition(WINRT_GlobalSDLWindow, args->CurrentPoint->Position));
#endif
WINRT_ProcessPointerWheelChangedEvent(WINRT_GlobalSDLWindow, args->CurrentPoint);
}
void SDL_WinRTApp::OnMouseMoved(MouseDevice^ mouseDevice, MouseEventArgs^ args)
{
WINRT_ProcessMouseMovedEvent(WINRT_GlobalSDLWindow, args);
}
void SDL_WinRTApp::OnKeyDown(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::KeyEventArgs^ args)
{
WINRT_ProcessKeyDownEvent(args);
}
void SDL_WinRTApp::OnKeyUp(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::KeyEventArgs^ args)
{
WINRT_ProcessKeyUpEvent(args);
}

12
src/core/winrt/SDL_winrtxaml.cpp
View File

@ -57,6 +57,12 @@ WINRT_OnPointerPressedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input
WINRT_ProcessPointerPressedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
}
static void
WINRT_OnPointerMovedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
{
WINRT_ProcessPointerMovedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
}
static void
WINRT_OnPointerReleasedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
{
@ -69,12 +75,6 @@ WINRT_OnPointerWheelChangedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::
WINRT_ProcessPointerWheelChangedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
}
static void
WINRT_OnPointerMovedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
{
WINRT_ProcessPointerMovedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
}
#endif // WINAPI_FAMILY == WINAPI_FAMILY_APP

18
src/video/winrt/SDL_winrtevents_c.h
View File

@ -45,19 +45,19 @@ extern void WINRT_PumpEvents(_THIS);
*/
#ifdef __cplusplus_winrt
/* Pointers (Mice, Touch, etc.) */
extern Windows::Foundation::Point WINRT_TransformCursorPosition(SDL_Window * window, Windows::Foundation::Point rawPosition);
extern Uint8 WINRT_GetSDLButtonForPointerPoint(Windows::UI::Input::PointerPoint ^pt);
extern void WINRT_ProcessPointerPressedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessPointerMovedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessPointerReleasedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessPointerWheelChangedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessMouseMovedEvent(SDL_Window * window, Windows::Devices::Input::MouseEventArgs ^args);
/* Keyboard */
extern void WINRT_ProcessKeyDownEvent(Windows::UI::Core::KeyEventArgs ^args);
extern void WINRT_ProcessKeyUpEvent(Windows::UI::Core::KeyEventArgs ^args);
/* Pointers (Mice, Touch, etc.) */
extern void WINRT_ProcessMouseMovedEvent(SDL_Window * window, Windows::Devices::Input::MouseEventArgs ^args);
extern void WINRT_ProcessPointerMovedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessPointerWheelChangedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessPointerReleasedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern void WINRT_ProcessPointerPressedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint);
extern Uint8 WINRT_GetSDLButtonForPointerPoint(Windows::UI::Input::PointerPoint ^pt);
extern Windows::Foundation::Point WINRT_TransformCursorPosition(SDL_Window * window, Windows::Foundation::Point rawPosition);
/* XAML Thread Management */
extern void WINRT_CycleXAMLThread();

271
src/video/winrt/SDL_winrtpointerinput.cpp
View File

@ -47,7 +47,6 @@ WINRT_InitTouch(_THIS)
SDL_AddTouch(WINRT_TouchID, "");
}
// Applies necessary geometric transformations to raw cursor positions:
Windows::Foundation::Point
WINRT_TransformCursorPosition(SDL_Window * window, Windows::Foundation::Point rawPosition)
@ -114,79 +113,6 @@ _lround(float arg)
}
}
void
WINRT_ProcessMouseMovedEvent(SDL_Window * window, Windows::Devices::Input::MouseEventArgs ^args)
{
if (!window || !WINRT_UsingRelativeMouseMode) {
return;
}
// DLudwig, 2012-12-28: On some systems, namely Visual Studio's Windows
// Simulator, as well as Windows 8 in a Parallels 8 VM, MouseEventArgs'
// MouseDelta field often reports very large values. More information
// on this can be found at the following pages on MSDN:
// - http://social.msdn.microsoft.com/Forums/en-US/winappswithnativecode/thread/a3c789fa-f1c5-49c4-9c0a-7db88d0f90f8
// - https://connect.microsoft.com/VisualStudio/Feedback/details/756515
//
// The values do not appear to be as large when running on some systems,
// most notably a Surface RT. Furthermore, the values returned by
// CoreWindow's PointerMoved event, and sent to this class' OnPointerMoved
// method, do not ever appear to be large, even when MouseEventArgs'
// MouseDelta is reporting to the contrary.
//
// On systems with the large-values behavior, it appears that the values
// get reported as if the screen's size is 65536 units in both the X and Y
// dimensions. This can be viewed by using Windows' now-private, "Raw Input"
// APIs. (GetRawInputData, RegisterRawInputDevices, WM_INPUT, etc.)
//
// MSDN's documentation on MouseEventArgs' MouseDelta field (at
// http://msdn.microsoft.com/en-us/library/windows/apps/windows.devices.input.mouseeventargs.mousedelta ),
// does not seem to indicate (to me) that its values should be so large. It
// says that its values should be a "change in screen location". I could
// be misinterpreting this, however a post on MSDN from a Microsoft engineer (see:
// http://social.msdn.microsoft.com/Forums/en-US/winappswithnativecode/thread/09a9868e-95bb-4858-ba1a-cb4d2c298d62 ),
// indicates that these values are in DIPs, which is the same unit used
// by CoreWindow's PointerMoved events (via the Position field in its CurrentPoint
// property. See http://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.input.pointerpoint.position.aspx
// for details.)
//
// To note, PointerMoved events are sent a 'RawPosition' value (via the
// CurrentPoint property in MouseEventArgs), however these do not seem
// to exhibit the same large-value behavior.
//
// The values passed via PointerMoved events can't always be used for relative
// mouse motion, unfortunately. Its values are bound to the cursor's position,
// which stops when it hits one of the screen's edges. This can be a problem in
// first person shooters, whereby it is normal for mouse motion to travel far
// along any one axis for a period of time. MouseMoved events do not have the
// screen-bounding limitation, and can be used regardless of where the system's
// cursor is.
//
// One possible workaround would be to programmatically set the cursor's
// position to the screen's center (when SDL's relative mouse mode is enabled),
// however WinRT does not yet seem to have the ability to set the cursor's
// position via a public API. Win32 did this via an API call, SetCursorPos,
// however WinRT makes this function be private. Apps that use it won't get
// approved for distribution in the Windows Store. I've yet to be able to find
// a suitable, store-friendly counterpart for WinRT.
//
// There may be some room for a workaround whereby OnPointerMoved's values
// are compared to the values from OnMouseMoved in order to detect
// when this bug is active. A suitable transformation could then be made to
// OnMouseMoved's values. For now, however, the system-reported values are sent
// to SDL with minimal transformation: from native screen coordinates (in DIPs)
// to SDL window coordinates.
//
const Windows::Foundation::Point mouseDeltaInDIPs((float)args->MouseDelta.X, (float)args->MouseDelta.Y);
const Windows::Foundation::Point mouseDeltaInSDLWindowCoords = WINRT_TransformCursorPosition(window, mouseDeltaInDIPs);
SDL_SendMouseMotion(
window,
0,
1,
_lround(mouseDeltaInSDLWindowCoords.X),
_lround(mouseDeltaInSDLWindowCoords.Y));
}
Uint8
WINRT_GetSDLButtonForPointerPoint(Windows::UI::Input::PointerPoint ^pt)
{
@ -276,68 +202,6 @@ WINRT_IsTouchEvent(Windows::UI::Input::PointerPoint ^pointerPoint)
#endif
}
void
WINRT_ProcessPointerMovedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window || WINRT_UsingRelativeMouseMode) {
return;
}
Windows::Foundation::Point transformedPoint = WINRT_TransformCursorPosition(window, pointerPoint->Position);
if (pointerPoint->PointerId == WINRT_LeftFingerDown) {
SDL_SendMouseMotion(window, 0, 0, (int)transformedPoint.X, (int)transformedPoint.Y);
}
if (WINRT_IsTouchEvent(pointerPoint)) {
SDL_SendTouchMotion(
WINRT_TouchID,
(SDL_FingerID) pointerPoint->PointerId,
transformedPoint.X,
transformedPoint.Y,
pointerPoint->Properties->Pressure);
}
}
void
WINRT_ProcessPointerWheelChangedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window) {
return;
}
// FIXME: This may need to accumulate deltas up to WHEEL_DELTA
short motion = pointerPoint->Properties->MouseWheelDelta / WHEEL_DELTA;
SDL_SendMouseWheel(window, 0, 0, motion);
}
void WINRT_ProcessPointerReleasedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window) {
return;
}
Windows::Foundation::Point transformedPoint = WINRT_TransformCursorPosition(window, pointerPoint->Position);
if (WINRT_LeftFingerDown == pointerPoint->PointerId) {
Uint8 button = WINRT_GetSDLButtonForPointerPoint(pointerPoint);
if (button) {
SDL_SendMouseButton(window, 0, SDL_RELEASED, button);
}
WINRT_LeftFingerDown = 0;
}
if (WINRT_IsTouchEvent(pointerPoint)) {
SDL_SendTouch(
WINRT_TouchID,
(SDL_FingerID) pointerPoint->PointerId,
SDL_FALSE,
transformedPoint.X,
transformedPoint.Y,
pointerPoint->Properties->Pressure);
}
}
void WINRT_ProcessPointerPressedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window) {
@ -368,5 +232,140 @@ void WINRT_ProcessPointerPressedEvent(SDL_Window *window, Windows::UI::Input::Po
pointerPoint->Properties->Pressure);
}
}
void
WINRT_ProcessPointerMovedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window || WINRT_UsingRelativeMouseMode) {
return;
}
Windows::Foundation::Point transformedPoint = WINRT_TransformCursorPosition(window, pointerPoint->Position);
if (pointerPoint->PointerId == WINRT_LeftFingerDown) {
SDL_SendMouseMotion(window, 0, 0, (int)transformedPoint.X, (int)transformedPoint.Y);
}
if (WINRT_IsTouchEvent(pointerPoint)) {
SDL_SendTouchMotion(
WINRT_TouchID,
(SDL_FingerID) pointerPoint->PointerId,
transformedPoint.X,
transformedPoint.Y,
pointerPoint->Properties->Pressure);
}
}
void WINRT_ProcessPointerReleasedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window) {
return;
}
Windows::Foundation::Point transformedPoint = WINRT_TransformCursorPosition(window, pointerPoint->Position);
if (WINRT_LeftFingerDown == pointerPoint->PointerId) {
Uint8 button = WINRT_GetSDLButtonForPointerPoint(pointerPoint);
if (button) {
SDL_SendMouseButton(window, 0, SDL_RELEASED, button);
}
WINRT_LeftFingerDown = 0;
}
if (WINRT_IsTouchEvent(pointerPoint)) {
SDL_SendTouch(
WINRT_TouchID,
(SDL_FingerID) pointerPoint->PointerId,
SDL_FALSE,
transformedPoint.X,
transformedPoint.Y,
pointerPoint->Properties->Pressure);
}
}
void
WINRT_ProcessPointerWheelChangedEvent(SDL_Window *window, Windows::UI::Input::PointerPoint ^pointerPoint)
{
if (!window) {
return;
}
// FIXME: This may need to accumulate deltas up to WHEEL_DELTA
short motion = pointerPoint->Properties->MouseWheelDelta / WHEEL_DELTA;
SDL_SendMouseWheel(window, 0, 0, motion);
}
void
WINRT_ProcessMouseMovedEvent(SDL_Window * window, Windows::Devices::Input::MouseEventArgs ^args)
{
if (!window || !WINRT_UsingRelativeMouseMode) {
return;
}
// DLudwig, 2012-12-28: On some systems, namely Visual Studio's Windows
// Simulator, as well as Windows 8 in a Parallels 8 VM, MouseEventArgs'
// MouseDelta field often reports very large values. More information
// on this can be found at the following pages on MSDN:
// - http://social.msdn.microsoft.com/Forums/en-US/winappswithnativecode/thread/a3c789fa-f1c5-49c4-9c0a-7db88d0f90f8
// - https://connect.microsoft.com/VisualStudio/Feedback/details/756515
//
// The values do not appear to be as large when running on some systems,
// most notably a Surface RT. Furthermore, the values returned by
// CoreWindow's PointerMoved event, and sent to this class' OnPointerMoved
// method, do not ever appear to be large, even when MouseEventArgs'
// MouseDelta is reporting to the contrary.
//
// On systems with the large-values behavior, it appears that the values
// get reported as if the screen's size is 65536 units in both the X and Y
// dimensions. This can be viewed by using Windows' now-private, "Raw Input"
// APIs. (GetRawInputData, RegisterRawInputDevices, WM_INPUT, etc.)
//
// MSDN's documentation on MouseEventArgs' MouseDelta field (at
// http://msdn.microsoft.com/en-us/library/windows/apps/windows.devices.input.mouseeventargs.mousedelta ),
// does not seem to indicate (to me) that its values should be so large. It
// says that its values should be a "change in screen location". I could
// be misinterpreting this, however a post on MSDN from a Microsoft engineer (see:
// http://social.msdn.microsoft.com/Forums/en-US/winappswithnativecode/thread/09a9868e-95bb-4858-ba1a-cb4d2c298d62 ),
// indicates that these values are in DIPs, which is the same unit used
// by CoreWindow's PointerMoved events (via the Position field in its CurrentPoint
// property. See http://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.input.pointerpoint.position.aspx
// for details.)
//
// To note, PointerMoved events are sent a 'RawPosition' value (via the
// CurrentPoint property in MouseEventArgs), however these do not seem
// to exhibit the same large-value behavior.
//
// The values passed via PointerMoved events can't always be used for relative
// mouse motion, unfortunately. Its values are bound to the cursor's position,
// which stops when it hits one of the screen's edges. This can be a problem in
// first person shooters, whereby it is normal for mouse motion to travel far
// along any one axis for a period of time. MouseMoved events do not have the
// screen-bounding limitation, and can be used regardless of where the system's
// cursor is.
//
// One possible workaround would be to programmatically set the cursor's
// position to the screen's center (when SDL's relative mouse mode is enabled),
// however WinRT does not yet seem to have the ability to set the cursor's
// position via a public API. Win32 did this via an API call, SetCursorPos,
// however WinRT makes this function be private. Apps that use it won't get
// approved for distribution in the Windows Store. I've yet to be able to find
// a suitable, store-friendly counterpart for WinRT.
//
// There may be some room for a workaround whereby OnPointerMoved's values
// are compared to the values from OnMouseMoved in order to detect
// when this bug is active. A suitable transformation could then be made to
// OnMouseMoved's values. For now, however, the system-reported values are sent
// to SDL with minimal transformation: from native screen coordinates (in DIPs)
// to SDL window coordinates.
//
const Windows::Foundation::Point mouseDeltaInDIPs((float)args->MouseDelta.X, (float)args->MouseDelta.Y);
const Windows::Foundation::Point mouseDeltaInSDLWindowCoords = WINRT_TransformCursorPosition(window, mouseDeltaInDIPs);
SDL_SendMouseMotion(
window,
0,
1,
_lround(mouseDeltaInSDLWindowCoords.X),
_lround(mouseDeltaInSDLWindowCoords.Y));
}
#endif // SDL_VIDEO_DRIVER_WINRT