I've gone nearly blind looking through the source code, and can't see
why I am experiencing the following behaviour. I have examined the
windows generated with Spy++, and the modal window has its parent/owner
set correctly, and I cannot see how the movement of the modal window
before calling DoModal causes a change in behaviour.
Am I using DoModal correctly? Does anyone else see the same problem.
Regards,
Rob.
# This shows a possible bug where a modal dialog loses its modality
# Try clicking on the close button of the main window after opening
# the modal window - the modal dialog closes, and a second click is
# need to then close the main window. The main window should
# be disabled.
#.
# If the code to center the dialog is moved to an 'onActivate'
# callback (or removed), then it all works fine.
#
# If the modal window is also a dialog window (-dialogui => 1), then
# it's special navigation features are lost (i.e. tabbing stops working,
# return = OK does not work).
#
# Workarounds:
# (1) Don't Center (or otherwise move the dialog) before calling doModal.
# I have resolved this by putting the Center() call in an onActivate
# handler.
# (2) If you only have one top-level window, set the 'all' flag to 1.
# I.e. $modal->DoModal(1).
use strict;
use warnings;
use Win32::GUI;
my $mw = Win32::GUI::Window->new(
-title => "doModal() Bug",
-pos => [100,100],
-size => [200,200],
);
$mw->AddButton(
-text => "Open Modal Window",
-onClick => \&openModal,
);
my $modal = Win32::GUI::Window->new(
-parent => $mw,
-title => "Modal Window",
-size => [100,100],
);
$mw->Show();
Win32::GUI::Dialog();
exit(0);
sub openModal
{
# Comment out this next line to see correct behaviour
$modal->Center($mw);
$modal->DoModal();
return 1;
}
