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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

SDL_SetJoystickVirtualTouchpad

Set touchpad finger state on an opened virtual joystick.

Header File

Defined in <SDL3/SDL_joystick.h>

Syntax

int SDL_SetJoystickVirtualTouchpad(SDL_Joystick *joystick, int touchpad, int finger, Uint8 state, float x, float y, float pressure);

Function Parameters

SDL_Joystick * joystick the virtual joystick on which to set state.
int touchpad the index of the touchpad on the virtual joystick to update.
int finger the index of the finger on the touchpad to set.
Uint8 state SDL_PRESSED if the finger is pressed, SDL_RELEASED if the finger is released.
float x the x coordinate of the finger on the touchpad, normalized 0 to 1, with the origin in the upper left.
float y the y coordinate of the finger on the touchpad, normalized 0 to 1, with the origin in the upper left.
float pressure the pressure of the finger.

Return Value

(int) Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

Remarks

Please note that values set here will not be applied until the next call to SDL_UpdateJoysticks, which can either be called directly, or can be called indirectly through various other SDL APIs, including, but not limited to the following: SDL_PollEvent, SDL_PumpEvents, SDL_WaitEventTimeout, SDL_WaitEvent.

Version

This function is available since SDL 3.0.0.


CategoryAPI, CategoryAPIFunction, CategoryJoystick


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