glutMouseFunc

GLUTMOUSEFUNC(3)                 Local Manual                 GLUTMOUSEFUNC(3)

NAME
     glutMouseFunc — Sets the mouse-button callback for the current window.

LIBRARY
     OpenGLUT - input

SYNOPSIS
     #include <openglut.h>

     void
     glutMouseFunc(void( *callback )( int button, int state, int x, int y ));

PARAMETERS
      callback     Client hook for mouse-buttons.

DESCRIPTION
     Whenever a mouse button is pressed or released in an OpenGLUT window,
     OpenGLUT checks if that window has a mouse-button (Mouse) callback
     registered.  If so, OpenGLUT gives the event to the handler.   button  is
     the button number, starting from 0.   state  is  GLUT_UP  or  GLUT_DOWN
     to indicate the button's new state.  The other parameters are the mouse
     coordinates.

     Mouse wheel motion can be reported as buttons.  If you do not request
     otherwise, a wheel spun forward will act like a button clicking down,
     immediately followed by clicking up.  Spinning the same wheel backward
     will act like a different button clicking.  Mouse wheel pseudo-buttons
     are added after all real buttons.

     While the button is held and the mouse is dragged, you receive mouse-
     motion events (glutMotionFunc()), even if the mouse is dragged out of the
     window.

     This callback is bound to the  current window  .

CAVEATS
     Reporting the wheel as buttons is actually inherited from X. freeglut
     added code to support this on WIN32.  OpenGLUT inherited that support
     from freeglut.

     Old GLUT defines the symbols  GLUT_LEFT_BUTTON,   GLUT_RIGHT_BUTTON,  and
      GLUT_MIDDLE_BUTTON.   However, mice can have more than 3 buttons, so
     these symbols are deprecated.

     Windows created via glutCreateMenuWindow() always cascade keyboard and
     mouse events to their parent.

SEE ALSO
     glutMotionFunc(3) glutPassiveMotionFunc(3) glutMouseWheelFunc(3)




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