Return window related information.
http://www.purl.org/tcl/home/man/tcl8.4/TkCmd/winfo.html
See wm for Window manager related information.
Notice that the return value of [winfo id ...] is the id used by toplevel and wish in
toplevel ... -use $id
and
wish ... -use $id
Here's an example:
label .t1 -text Above
label .t2 -text Below
frame .holder -container 1
pack .t1 .holder .t2
exec wish other_application.tcl -use [winfo id .holder] &[Include an image here.]
Incidental remark: when CL substitutes
exec tclkit tiny.tcl -use [winfo id .holder] &
for that last line, while running on WinNT, with tiny.tcl having content
pack [.button -text "Push me" -command exit]
everything comes up OK. When the button is pushed, "Dr. Watson" appears. Dismissing it eventually results in a whited-out frame "hole" in the embedding Wish. Is this an error in TclKit 8.4a3?
It's probably time to make separate pages for "winfo atom", "winfo exists", "winfo id", and so on.
In any case, note that "winfo rgb" is not idempotent (or surjective) over the space of decimal triples. CL believes that the point is that the range space of "winfo rgb" is the display's color palette (is that the right GUI vernacular?), and is thus smaller than the full cartesian product ([0-65535],[0-65535],[0-65535]) one might otherwise expect.
This presented with VNC service for which
winfo rgb . #ffff1fffffff
is
65535 0 65535
rather than the
65535 7967 65535
delivered by a better-endowed display.
A start to a work-around for this is ...
Category Command | Tk syntax help | Arts and Crafts of Tcl-Tk Programming