pen topic

CategoryPen

SDL pen event handling.

SDL provides an API for pressure-sensitive pen (stylus and/or eraser) handling, e.g., for input and drawing tablets or suitably equipped mobile / tablet devices.

To get started with pens, simply handle pen events:

  • SDL_EVENT_PEN_PROXIMITY_IN, SDL_EVENT_PEN_PROXIMITY_OUT (SDL_PenProximityEvent)
  • SDL_EVENT_PEN_DOWN, SDL_EVENT_PEN_UP (SDL_PenTouchEvent)
  • SDL_EVENT_PEN_MOTION (SDL_PenMotionEvent)
  • SDL_EVENT_PEN_BUTTON_DOWN, SDL_EVENT_PEN_BUTTON_UP (SDL_PenButtonEvent)
  • SDL_EVENT_PEN_AXIS (SDL_PenAxisEvent)

When a pen starts providing input, SDL will assign it a unique SDL_PenID, which will remain for the life of the process, as long as the pen stays connected.

Pens may provide more than simple touch input; they might have other axes, such as pressure, tilt, rotation, etc.

Functions

sdlGetPenDeviceType(int instanceId) → int pen
Get the device type of the given pen.