I seem to unable to create a control in a subroutine and then immediately destroy it if a condition is true.
I assume this is a moot point by now, since the show/hide approach is best, but here it is, for posterity :)
Your code does not attempt to do that
Ignoring that for a minute, this is common for all GUI frameworks, when MainLoop is running, calling Destroy from a callback doesn't actually destroy a window immediately, it schedules it for destruction. See
Now back to the code, this will show you the error
sub button_click {
$hit++;
warn "hit $hit ";
my $warning = Wx::StaticText->new($status, -1, "Input Error $hit "
+,,[3,8]);
$warning->SetForegroundColour(wxRED);
if ($hit % 2) {
$status->SetStatusText("", 0);
$warning->Show;
}
else {
$warning->Destroy;
$status->SetStatusText("OK", 0);
}
warn "[\n", map({ "\t$_,\n" } $status->GetChildren ), "\] ";
}
The output is
$ perl wx.904074.event.pl
hit 2 at wx.904074.event.pl line 34.
[
] at wx.904074.event.pl line 46.
hit 3 at wx.904074.event.pl line 34.
[
Wx::StaticText=HASH(0xed4c34),
] at wx.904074.event.pl line 46.
hit 4 at wx.904074.event.pl line 34.
[
Wx::StaticText=HASH(0xed4c34),
] at wx.904074.event.pl line 46.
hit 5 at wx.904074.event.pl line 34.
[
Wx::StaticText=HASH(0xed4c34),
Wx::StaticText=HASH(0xed4be4),
] at wx.904074.event.pl line 46.
hit 6 at wx.904074.event.pl line 34.
[
Wx::StaticText=HASH(0xed4c34),
Wx::StaticText=HASH(0xed4be4),
] at wx.904074.event.pl line 46.
hit 7 at wx.904074.event.pl line 34.
[
Wx::StaticText=HASH(0xed4c34),
Wx::StaticText=HASH(0xed4be4),
Wx::StaticText=HASH(0xed4c44),
] at wx.904074.event.pl line 46.
hit 8 at wx.904074.event.pl line 34.
With each iteration you're creating a new statictext, but you only Destroy it every other iteration, so the list of statictext objects keeps growing.
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