tjh@bu-pub.bu.edu (Tim Hall) (06/14/90)
Is there an event caused when one window is opened on top of another window that references the bottom window? For example, a REDRAW event that gives the gid of the bottom window. I read through the manual, tried the REDRAW and DEPTHCHANGE events...nothing... :-( In reference to the non-blocking keyboard reading... In article <14670@thorin.cs.unc.edu> taylorr@glycine.cs.unc.edu (Russell Taylor) writes: >> I want to do non-blocking keyboard I/O in a program. Basically, the Archer Sully (archer@esd.sgi.com) >Check out 'Advanced UNIX(tm) Programming' by Marc Rochkind. It contains If you aren't concerned about portability then this is very easy to do using the gl event queue. First you have to queue the keyboard with the call "qdevice( KEYBOARD )" then you could do somthing like... char read_keyboard( ) { int ret; short val; /* non-blocking test of the first value in the event queue */ ret = qtest( ); if ( ret != KEYBOARD ) return( NULL ); /* 'val' gets the ASCII value of the keyboard key */ qread( &val ); return( (char)val ); } Of course you have to deal with the non-keyboard events somewhere else in the code. -Tim Hall tjh@bu-pub.bu.edu