Re: Using a tk text widget for stdout

WillemF wrote:
I am using a text widget as a substitute for the stdout of binary
executables in Linux.
e.g: if t is the tk text widget:

$t insert end [exec ./dnaml < dnaml.setup]

However, the whole output of dnaml to stdout is only appended within
the widget after dnaml has completed execution. While dnaml is
executing, no output appears in the widget. I need to see the output as
it is produced, more or less as it would appear in a terminal window.
Id there any way around this problem? Is the text widget perhaps
inappropriate? I would greatly appreciate any advice.

In Linux no problem. Just do:

proc getResult {channel} {
.t insert end [read $channel]
}
set f [open | ./dnaml < dnaml.setup]
fconfigure $f -blocking 0
fileevent $f readable "getResult $f"

This code doesn't work in Windows though, you'll get the output only
after a program terminates just like what you're getting now.

.

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