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Add SDL_TouchDeviceType enum and SDL_GetTouchDeviceType(SDL_TouchID id).

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Touch device types include SDL_TOUCH_DEVICE_DIRECT (a touch screen with window-relative coordinates for touches), SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE (a trackpad-style device with absolute device coordinates), and SDL_TOUCH_DEVICE_INDIRECT_RELATIVE (a trackpad-style device with screen cursor-relative coordinates).

Phone screens are an example of a direct device type. Mac trackpads are the indirect-absolute touch device type. The Apple TV remote is an indirect-relative touch device type.
This commit is contained in:
Alex Szpakowski
2018-11-10 16:15:48 -04:00
parent 2196e5765c
commit 5029d50ea8
15 changed files with 109 additions and 15 deletions
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6
src/video/windows/SDL_windowsevents.c
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@@ -932,7 +932,11 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
PTOUCHINPUT input = &inputs[i];
const SDL_TouchID touchId = (SDL_TouchID)((size_t)input->hSource);
if (SDL_AddTouch(touchId, "") < 0) {
/* TODO: Can we use GetRawInputDeviceInfo and HID info to
determine if this is a direct or indirect touch device?
*/
if (SDL_AddTouch(touchId, SDL_TOUCH_DEVICE_DIRECT, "") < 0) {
continue;
}