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Diffstat (limited to 'ipl/gprocs/ifg.icn')
| -rw-r--r-- | ipl/gprocs/ifg.icn | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/ipl/gprocs/ifg.icn b/ipl/gprocs/ifg.icn new file mode 100644 index 0000000..433f68f --- /dev/null +++ b/ipl/gprocs/ifg.icn @@ -0,0 +1,33 @@ +############################################################################ +# +# File: ifg.icn +# +# Subject: Procedure to tell if graphics are running +# +# Author: Ralph E. Griswold +# +# Date: June 14 1994 +# +############################################################################ +# +# This file is in the public domain. +# +############################################################################ +# +# ifg() fails if (a) the running version of Icon does not support +# graphics, or (b) if it is, the graphics system is not running. +# +############################################################################ + +procedure ifg() + local win + + if (&features == "graphics") & + win := open("", "x", "canvas=hidden") then { + close(win) + return + } + + else fail + +end |