[wxperl-users] memory access violation

[Paul S. <pa...@kf...>]

hi,
 
in the code below i use a CheckListBox and a TreeCtrl; i fill the
CheckListBox with values 1..100 with the sub FillCheckBox in the package
myTreeCtrl; when i run the app and click into the CheckListBox the
program will abort because of a memory-access-violation. sometimes this
happens at the first click inside, sometimes it takes some more. i get
the same error when having marked an item in the CheckListBox and
pressing spacebar. i'm working under Win2000, perl v5.6.0 from
ActiveState and wxPerl 0.07. can anyone help me ?
 
regards
paul
 
 
############################
use Wx;
 
package myFrame;
 
use strict;
use vars qw(@ISA);
 
@ISA = qw(Wx::Frame);
 
my ($ID_QUIT,$ID_CHKLISTBOX) = ( 1 .. 10 );
 
use Wx qw(:treectrl :window :sizer 
  wxDefaultPosition wxDefaultSize wxLB_MULTIPLE wxLB_HSCROLL
wxLB_NEEDED_SB wxLB_SORT);
 
sub new {
  my $class = shift;
  my $this = $class->SUPER::new( undef, -1, $_[0], [ @_[1, 2] ],
                                 [ @_[3, 4] ] );
 
  $this->SetIcon( Wx::GetWxPerlIcon() );
 
  my $sizer1 = Wx::BoxSizer->new( wxHORIZONTAL);
 
  $this->{CHECKLISTBOX} =
    Wx::CheckListBox->new($this, $ID_CHKLISTBOX, wxDefaultPosition,
wxDefaultSize, [],
 
wxLB_MULTIPLE|wxLB_HSCROLL|wxLB_NEEDED_SB|wxLB_SORT);
 
  $this->{TREECTRL} =
    myTreeCtrl->new($this->{CHECKLISTBOX}, $this, -1, wxDefaultPosition,
wxDefaultSize,
                     wxTR_HAS_BUTTONS|wxTR_EDIT_LABELS|wxSUNKEN_BORDER);
  
  $sizer1->Add($this->{TREECTRL}, 2, wxGROW);
  $sizer1->Add($this->{CHECKLISTBOX}, 1, wxGROW);
  $this->SetSizer($sizer1);
  $this->SetAutoLayout(1);
 
  my $file = Wx::Menu->new;
  $file->Append($ID_QUIT, "E&xit" );
 
  my $bar = Wx::MenuBar->new;
  $bar->Append($file, "&File");
 
  $this->SetMenuBar( $bar );
 
  use Wx::Event qw(EVT_MENU EVT_UPDATE_UI);
  EVT_MENU($this, $ID_QUIT, \&OnQuit);
 
  $this;
}
 
sub OnQuit {
  my( $this, $event ) = @_;
  $this->Close( 1 );
}
#######################################
 
package myTreeCtrl;
 
use strict;
use vars qw(@ISA);
 
@ISA = qw(Wx::TreeCtrl);
 
sub new {
  my $class = shift;
  my $listbox = shift;
  my $this = $class->SUPER::new( @_ );
 
  $this->{CHECKLISTBOX} = $listbox;
  $this->FillCheckBox($listbox);
 
  $this;
}
 
sub FillCheckBox {
  my ($this, $listbox) = @_;
 
  for (my $i = 0; $i < 100; $i++) {
    $listbox->Append($i);
  }
}
#######################################
 
package myApp;
 
use strict;
use vars qw(@ISA);
 
@ISA = qw(Wx::App);
 
sub OnInit {
  my $this = shift;
  my $frame = myFrame->new("Window", 50, 50, 450, 450);
  $frame->Show(1);
  $this->SetTopWindow($frame);
  1;
}
#######################################
 
package main;
 
my $app = myApp->new;
$app->MainLoop;
#######################################