glutTabletButtonFunc
Prev | GLUT | Next

## Name

glutTabletButtonFunc — sets the special keyboard callback for the current window.

## C Specification

`void `glutTabletButtonFunc`` | `(` | `void (*`func`)(int button, int state, int x, int y));`

## Python Specification

``glutTabletButtonFunc`` | `(` | ``func`) → `None``

## Parameters

`func`
  The new tablet button callback function.

## Description

`glutTabletButtonFunc` sets the tablet button callback for the current window. The tablet button callback for a window is called when the window has tablet input focus (normally, when the mouse is in the window) and the user generates tablet button presses. The `button` parameter will be the button number (starting at one). The number of available tablet buttons can be determined with `glutDeviceGet(GLUT_NUM_TABLET_BUTTONS)`. The `state` is either `GLUT_UP` or `GLUT_DOWN` indicating whether the callback was due to a release or press respectively. The `x` and `y` callback parameters indicate the window relative coordinates when the tablet button state changed.

Registering a tablet button callback when a tablet device is not available is ineffectual and not an error. In this case, no tablet button callbacks will be generated.

Passing `NULL` to `glutTabletButtonFunc` disables the generation of tablet button callbacks. When a new window is created, no tablet button callback is initially registered.

## See Also

glutTabletMotionFunc, glutDeviceGet, glutMotionFunc, glutSpaceballMotionFunc

Prev | Up | Next
glutSwapBuffers | Home | glutTabletMotionFunc