A subcommand of Tk's winfo command.
winfo id window
Returns a hexadecimal string giving a low-level platform-specific identifier for window. On Unix platforms, this is the X window identifier. Under Windows, this is the Windows HWND. On the Macintosh the value has no meaning outside Tk.
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?
Category Command | Tk syntax help | Arts and Crafts of Tcl-Tk Programming