[perl-win32-gui-users] RE: Treeview, Toolbar and Imagelist problem. Memory trouble?

[Roelof B. <ro...@ni...>]

> A quick reply - I'll have a proper look tomorrow.

Great!

> This sounds like a scoping issue. Take the line:
> 
> $ExplorerImageList->Add(new Win32::GUI::Bitmap("file_folder.bmp"));
> This will add a newly created bitmap to the image list - but 
> the bitmap will 
> be "destroyed" by Perl since it thinks the object is not used 
> any longer. 
> Having the bitmaps in a global var should solve your problem.

Nope, because the ImageList keeps a reference to the bitmap. Besides, we
should be (and we are) able to even write it like this:

$ExplorerImageList->Add("file_folder.bmp");

 Then the Add() method of ImageList will de new Win32::GUI::Bitmap for
us.

I tested both ways and now also as 

my $img = new Win32::GUI::Bitmap("test.bmp");
$Tb1ImageList->Add($img);

($Tb1ImageList is the only ImageList used in the example but you'll see
tomorrow)

But it all doesn't make a difference...

cheers
Roelof Bos

Original message
> > I have this test application (see attachment) with a toolbar and a
> > treeview.
> >
> > The treeview lists the drives an files on my computer.  The 
> toolbar just
> > contains 10 test buttons with images. The treeview and toolbar
> > theirselfs seem to work fine. But if I expand an item in 
> the treeview
> > twice (expand,expand or expand,collapse) the images in the toolbar
> > dissapear. Not directly, but as soon as I move my mouse 
> cursor over them
> > the dissapear. OR if i minimize the window and then re-show it all
> > images are gone. I used images in the treeview as well and 
> here the same
> > happens. I have tried a lot things but nothing seems to help.
> >
> > Is this a problem of the GUI::ImageList object? Or a problem of the
> > Treeview object?
> >
> > Is there anyone who knows a workaround to keep my images "alive"?
> >
> > cheers,
> > Roelof Bos
> >
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