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Added mouse wheel deltas with floating point precision 

Fixes https://github.com/libsdl-org/SDL/issues/4888
This commit is contained in:
Sam Lantinga 2021-11-08 09:44:31 -08:00
parent d95a52c9a5
commit 5dbbc8e61f
2 changed files with 4 additions and 4 deletions
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2
include/SDL_events.h
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@ -301,6 +301,8 @@ typedef struct SDL_MouseWheelEvent
Sint32 x; /**< The amount scrolled horizontally, positive to the right and negative to the left */ Sint32 x; /**< The amount scrolled horizontally, positive to the right and negative to the left */
Sint32 y; /**< The amount scrolled vertically, positive away from the user and negative toward the user */ Sint32 y; /**< The amount scrolled vertically, positive away from the user and negative toward the user */
Uint32 direction; /**< Set to one of the SDL_MOUSEWHEEL_* defines. When FLIPPED the values in X and Y will be opposite. Multiply by -1 to change them back */ Uint32 direction; /**< Set to one of the SDL_MOUSEWHEEL_* defines. When FLIPPED the values in X and Y will be opposite. Multiply by -1 to change them back */
float preciseX; /**< The amount scrolled horizontally, positive to the right and negative to the left, with float precision (added in 2.0.18) */
float preciseY; /**< The amount scrolled vertically, positive away from the user and negative toward the user, with float precision (added in 2.0.18) */
} SDL_MouseWheelEvent; } SDL_MouseWheelEvent;
/** /**

6
src/events/SDL_mouse.c
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@ -650,12 +650,10 @@ SDL_SendMouseWheel(SDL_Window * window, SDL_MouseID mouseID, float x, float y, S
event.type = SDL_MOUSEWHEEL; event.type = SDL_MOUSEWHEEL;
event.wheel.windowID = mouse->focus ? mouse->focus->id : 0; event.wheel.windowID = mouse->focus ? mouse->focus->id : 0;
event.wheel.which = mouseID; event.wheel.which = mouseID;
#if 0 /* Uncomment this when it goes in for SDL 2.1 */
event.wheel.preciseX = x;
event.wheel.preciseY = y;
#endif
event.wheel.x = integral_x; event.wheel.x = integral_x;
event.wheel.y = integral_y; event.wheel.y = integral_y;
event.wheel.preciseX = x;
event.wheel.preciseY = y;
event.wheel.direction = (Uint32)direction; event.wheel.direction = (Uint32)direction;
posted = (SDL_PushEvent(&event) > 0); posted = (SDL_PushEvent(&event) > 0);
} }