Checks the contents of the event queue.
Int32 qtest( )
INTEGER*4 FUNCTION QTEST
The qtest subroutine returns zero if the event queue is empty. Otherwise, it returns the device number of the first entry. The queue remains unchanged.
Note: This subroutine cannot be used to add to a display list.
The device number of the first entry (0 if the event queue is empty).
The example C language program scrn_rotate.c uses the qtest subroutine to check if there is any input from the queued devices.
This subroutine is part of GL in the AIXwindows Environment/6000 Version 1, Release 2 with AIXwindows/3D Feature.
|/usr/include/gl/gl.h||Contains C language constant and variable type definitions for GL.|
|/usr/include/gl/fgl.h||Contains FORTRAN constant and variable type definitions for GL.|
|/usr/include/gl/device.h||Contains C language constant and variable type definitions for GL.|
|/usr/include/gl/fdevice.h||Contains FORTRAN constant and variable type definitions for GL.|
Creating an event queue entry with the qenter subroutine.
Reading the first entry in the event queue with the qread subroutine.
Emptying the event queue with the qreset subroutine.
AIX Graphics Library Overview and Controlling Queues and Devices.