Mouse wheel event structure (event.wheel.*)
Defined in SDL_events.h
typedef struct SDL_MouseWheelEvent
{
Uint32 type; /**< ::SDL_MOUSEWHEEL */
Uint32 timestamp; /**< In milliseconds, populated using SDL_GetTicks() */
Uint32 windowID; /**< The window with mouse focus, if any */
Uint32 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 */
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) */
} SDL_MouseWheelEvent;
SDL_Event event;
while( SDL_PollEvent( &event ) )
{
if(event.type == SDL_MOUSEWHEEL)
{
if(event.wheel.y > 0) // scroll up
{
// Put code for handling "scroll up" here!
}
else if(event.wheel.y < 0) // scroll down
{
// Put code for handling "scroll down" here!
}
if(event.wheel.x > 0) // scroll right
{
// ...
}
else if(event.wheel.x < 0) // scroll left
{
// ...
}
}
else if(event.type == SDL_MOUSEBUTTONDOWN)
{
// ... handle mouse clicks ...
}
// ... handle other kinds of events ...
}| Uint32 | type | SDL_MOUSEWHEEL |
| Uint32 | timestamp | timestamp of the event |
| Uint32 | windowID | the window with mouse focus, if any |
| Uint32 | which | the mouse instance id, or SDL_TOUCH_MOUSEID; see Remarks for details |
| 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 towards the user |
| Uint32 | direction | SDL_MOUSEWHEEL_NORMAL or SDL_MOUSEWHEEL_FLIPPED; see Remarks for details (>= SDL 2.0.4) |
| 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_Event SDL_MouseButtonEvent SDL_MouseMotionEvent
CategoryAPI, CategoryAPIStruct, CategoryStruct, CategoryEvents