Hi Monks, I have a Tk application that, apart from it's own window, needs to open a MainWindow on a large number of other displays (today: 20+, tomorrow: ??). This is going to be somewhat error-prone, and the application should be able to continue to run on whichever nodes do manage to start up successfully, so I need the opening of the MainWindow's to not cause too many problems in the event that a node is down, a display does not allow connections, etc. This is what I'm thinking so far: 
use strict;
use Tk;

my @Displays = qw"node1:0 node2:0";

my $top = MainWindow->new();
my %top;

my $orig_display = $ENV{'DISPLAY'};
foreach (@Displays) {
  $ENV{'DISPLAY'} = $_;

  if (eval {$top{$_} = MainWindow->new()}) {
    print "MainWindow opened on $_\n";
  } else {
    print "MainWindow failed to open on $_\n";
    $top{$_} = 0;
  }
}
$ENV{'DISPLAY'} = $orig_display;

MainLoop;

[download]
Can anybody see any problems with this? Or perhaps have any ideas, how this could be done better? I couldn't find any documentation for MainWindow... Cheers, Matt

In reply to Tk - is MainWindow robust? by matt.tovey

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