7.9 glutSpecialFunc

  glutSpecialFunc sets the special keyboard callback for the current window.

Usage

void glutSpecialFunc(void (*func)(int key, int x, int y));

func

The new entry callback function.

Description

glutSpecialFunc sets the special keyboard callback for the current window. The special keyboard callback is triggered when keyboard function or directional keys are pressed. The key callback parameter is a GLUT_KEY_* constant for the special key pressed. The x and y callback parameters indicate the mouse in window relative coordinates when the key was pressed. When a new window is created, no special callback is initially registered and special key strokes in the window are ignored. Passing NULL to glutSpecialFunc disables the generation of special callbacks.

During a special callback, glutGetModifiers may be called to determine the state of modifier keys when the keystroke generating the callback occurred.

An implementation should do its best to provide ways to generate all the GLUT_KEY_* special keys. The available GLUT_KEY_* values are:

GLUT_KEY_F1

F1 function key.

GLUT_KEY_F2

F2 function key.

GLUT_KEY_F3

F3 function key.

GLUT_KEY_F4

F4 function key.

GLUT_KEY_F5

F5 function key.

GLUT_KEY_F6

F6 function key.

GLUT_KEY_F7

F7 function key.

GLUT_KEY_F8

F8 function key.

GLUT_KEY_F9

F9 function key.

GLUT_KEY_F10

F10 function key.

GLUT_KEY_F11

F11 function key.

GLUT_KEY_F12

F12 function key.

GLUT_KEY_LEFT

Left directional key.

GLUT_KEY_UP

Up directional key.

GLUT_KEY_RIGHT

Right directional key.

GLUT_KEY_DOWN

Down directional key.

GLUT_KEY_PAGE_UP

Page up directional key.

GLUT_KEY_PAGE_DOWN

Page down directional key.

GLUT_KEY_HOME

Home directional key.

GLUT_KEY_END

End directional key.

GLUT_KEY_INSERT

Inset directional key.