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Mouse coordinates are floating point

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You can get sub-pixel mouse coordinates and motion depending on the platform and display scaling.

Fixes https://github.com/libsdl-org/SDL/issues/2999
This commit is contained in:
Sam Lantinga
2022-12-29 19:31:12 -08:00
parent 8c3239dee5
commit cefbeb582f
52 changed files with 564 additions and 654 deletions
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30
include/SDL3/SDL_events.h
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@@ -297,12 +297,12 @@ typedef struct SDL_MouseMotionEvent
Uint32 type; /**< ::SDL_MOUSEMOTION */
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_MouseID which; /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
SDL_MouseID which; /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
Uint32 state; /**< The current button state */
Sint32 x; /**< X coordinate, relative to window */
Sint32 y; /**< Y coordinate, relative to window */
Sint32 xrel; /**< The relative motion in the X direction */
Sint32 yrel; /**< The relative motion in the Y direction */
float x; /**< X coordinate, relative to window */
float y; /**< Y coordinate, relative to window */
float xrel; /**< The relative motion in the X direction */
float yrel; /**< The relative motion in the Y direction */
} SDL_MouseMotionEvent;
/**
@@ -313,13 +313,13 @@ typedef struct SDL_MouseButtonEvent
Uint32 type; /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_MouseID which; /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
SDL_MouseID which; /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
Uint8 button; /**< The mouse button index */
Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
Uint8 clicks; /**< 1 for single-click, 2 for double-click, etc. */
Uint8 padding1;
Sint32 x; /**< X coordinate, relative to window */
Sint32 y; /**< Y coordinate, relative to window */
Uint8 padding;
float x; /**< X coordinate, relative to window */
float y; /**< Y coordinate, relative to window */
} SDL_MouseButtonEvent;
/**
@@ -330,14 +330,12 @@ typedef struct SDL_MouseWheelEvent
Uint32 type; /**< ::SDL_MOUSEWHEEL */
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_MouseID which; /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
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 */
SDL_MouseID which; /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
float x; /**< The amount scrolled horizontally, positive to the right and negative to the left */
float 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 */
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) */
Sint32 mouseX; /**< X coordinate, relative to window (added in 2.26.0) */
Sint32 mouseY; /**< Y coordinate, relative to window (added in 2.26.0) */
float mouseX; /**< X coordinate, relative to window */
float mouseY; /**< Y coordinate, relative to window */
} SDL_MouseWheelEvent;
/**