Stderr(3) User Contributed Perl Documentation Stderr(3)NAMETk::Stderr - capture standard error output, display in separate window
SYNOPSIS
use Tk::Stderr;
$mw = MainWindow->new->InitStderr;
print STDERR 'stuff'; ## goes to standard error window
warn 'eek!'; ## likewise
DESCRIPTION
This module captures that standard error of a program and redirects it
to a read only text widget, which doesn't appear until necessary. When
it does appear, the user can close it; it'll appear again when there is
more output.
METHODS
These are actually added to the MainWindow class.
$mw->InitStderr;
The first time this method called, it does the following things:
o Creates a MainWindow holding a read-only scrollable text
widget, and withdraws this window until it's actually needed.
o Ties STDERR to a special handle that adds the output to this
text widget.
o Installs a $SIG{__WARN__} handler that redirects the output
from warn to this window as well (by printing it to STDERR).
On the remaining calls, it:
o Increments a reference count of "other" MainWindows.
o Installs an OnDestroy handler that decrements this reference
count, so that it can detect when it's the only MainWindow left
and destroy itself.
$errwin = $mw->StderrWindow;
Returns a reference to the main window holding the text. You can
use this to configure the window itself or the widgets it contains.
The only advertised subwidget is 'text', which is the scrolled
read-only text widget.
$old = $mw->RedirectStderr($boolean);
Enables or disables the redirection of standard error to the text
window. Set $boolean to true to enable redirection, false to
disable it. Returns the previous value of the enabled flag.
If InitStderr has never been called, this routine will call it if
$boolean is true.
AUTHOR
Kevin Michael Vail <kevin@vaildc.net>
perl v5.14.1 2003-04-01 Stderr(3)
