Add SDL_TouchDeviceType enum and SDL_GetTouchDeviceType(SDL_TouchID id).

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

View File

@@ -27,6 +27,7 @@
typedef struct SDL_Touch
{
SDL_TouchID id;
SDL_TouchDeviceType type;
int num_fingers;
int max_fingers;
SDL_Finger** fingers;
@@ -37,7 +38,7 @@ typedef struct SDL_Touch
extern int SDL_TouchInit(void);
/* Add a touch, returning the index of the touch, or -1 if there was an error. */
extern int SDL_AddTouch(SDL_TouchID id, const char *name);
extern int SDL_AddTouch(SDL_TouchID id, SDL_TouchDeviceType type, const char *name);
/* Get the touch with a given id */
extern SDL_Touch *SDL_GetTouch(SDL_TouchID id);