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WinRT: scaled relative mouse mode values from the native screen size to SDL's window size

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This commit is contained in:
David Ludwig 2012-12-28 16:10:44 -05:00
parent 1996781399
commit 0b532c19bb
1 changed files with 17 additions and 2 deletions
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19
src/video/windowsrt/SDL_WinRTApp.cpp
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@ -173,6 +173,14 @@ void SDL_WinRTApp::OnPointerReleased(CoreWindow^ sender, PointerEventArgs^ args)
}
}
static inline int _lround(float arg) {
if (arg >= 0.0f) {
return (int)floor(arg + 0.5f);
} else {
return (int)ceil(arg - 0.5f);
}
}
void SDL_WinRTApp::OnMouseMoved(MouseDevice^ mouseDevice, MouseEventArgs^ args)
{
if (m_sdlWindowData && m_useRelativeMouseMode) {
@ -229,9 +237,16 @@ void SDL_WinRTApp::OnMouseMoved(MouseDevice^ mouseDevice, MouseEventArgs^ args)
// 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
// without transformation.
// to SDL with minimal transformation: from native screen coordinates (in DIPs)
// to SDL window coordinates.
//
SDL_SendMouseMotion(m_sdlWindowData->sdlWindow, 1, args->MouseDelta.X, args->MouseDelta.Y);
const Point mouseDeltaInDIPs((float)args->MouseDelta.X, (float)args->MouseDelta.Y);
const Point mouseDeltaInSDLWindowCoords = TransformCursor(mouseDeltaInDIPs);
SDL_SendMouseMotion(
m_sdlWindowData->sdlWindow,
1,
_lround(mouseDeltaInSDLWindowCoords.X),
_lround(mouseDeltaInSDLWindowCoords.Y));
}
}