Hello monks

I have the following basic Tk application that uses Win32::OLE to copy a PPT files to another locaction (the task is not important here, it is just to illustrate my problem). The application works fine, but it freezes for a long time, even after the OLE operation has been concluded and the message window "Done!" is shown and closed.

Can this behaviour be solved? If not, how can I show my message "Done!" only after the GUI is reactive? The problem is that the user thinks s/he has control over the GUI as soon as the "Done!" message is shown.

Furthermore: shouldn't $ppt->{Visible} = 0; prevent the PowerPoint application to show up?

use strict;
use warnings;
use utf8;
use Tk;
use Try::Tiny;
use Win32::OLE;
use Win32::OLE::Const qw( Microsoft.PowerPoint );
use Win32::OLE::Enum;

my $mw = Tk::MainWindow->new(
    -width => 160,
    -height => 120,
);
$mw->packPropagate(0);
# Button erstellen:
my $but = $mw->Button(
    -text => "Save PPT", 
    -command => \&save_PPT,
);
$but->pack();
my $quit_btn = $mw->Button(
    -text => "Exit", 
    -command => \&quit_program,
);
$but->pack();
$quit_btn->pack();
$mw->MainLoop();


sub save_PPT {
    my $filename = "C:\\Users\\Taka\\Desktop\\original.pptx";
    my $ppt;
    try { $ppt = Win32::OLE->GetActiveObject('PowerPoint.Application')
+ }
    catch { die $_ }
    ;

    unless ( $ppt ) {
        $ppt = Win32::OLE->new(
            'PowerPoint.Application', sub { $_[0]->Quit }
        ) or return 'error';
    }

$ppt->{Visible} = 0;
my $presentation = $ppt->Presentations->Open($filename, 1);
my $slides = Win32::OLE::Enum->new( $presentation->Slides );

$presentation->SaveAs("SAVED_" . $filename);
$presentation->Close;
$mw->messageBox (-title => "message", -message=>"DONE!", -icon=> 'info
+');
} 

sub quit_program {
    exit(0);
}

[download]

Any suggestion would be very much appreciated.

In reply to Win32::OLE freezing Tk by Takamoto

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