Re: [paragui-users] Puzzled newbie question

[Alexander Pipelka]

Hi Guillaume

You're right. That's really a problem.
The right procedure would be to call eventSelectItem() *after* updating
the listboxitem.

I fixed this for version 1.0.2 which will be released soon.
If you can't (or don't want to) wait for the official release please
checkout the sources from the cvs repository:

cvs -d:pserver:address@hidden:/cvsroot/paragui login
pw: none (just hit enter)

cvs -z3 -d:pserver:address@hidden:/cvsroot/paragui co -r
devel-1-0 paragui

Thanks for the hint.

Alex
 
Am Mon, 2002-04-29 um 21.55 schrieb Guillaume Schmid:
> Hello,
> 
> I discovered paragui recently and I think that it is exactly what I
> need: a cool portable widget set. I just started to code my first tiny
> app and have a small problem.
> Might some enlightened soul bring some light on the subject ?
> Here it is:
> The app is a simple image viewer with (for the moment) one listbox on
> the left and some space to display the picture on the right.
> The listbox displays the list of files on the current dir. If a
> directory is selected, it does update itself with the new content.
> 
> I created a FileListBox that inherit from the PG_ListBox and redefine
> the eventSelectedItem method to update the list of widget.
> It does segfault. After diving into the sources I anderstood that it is
> because of the following call sequence:
> 
> 1 ListBoxItem call seelectedItem on it's parent in Select.
> 2 the parent delete the list of widget and create a new one.
> 3 ListboxItem calls Update in Select... Ooops, it does not exist any    
>   more -> segfault.
> 
> A first hack was to redefine ListboxItem::eventMouseButtonUp to just
> simply call the SelecteItem on the parent without updating itself.
> But it does not work because the Select Item call also Update on the
> child. So, another hack would be to redefine this method as well.
> But it seems a lot of hacks for such a simple task so there might be a
> better way to do it.
> 
> So,here are my 2 questions:
> 1 - How to do better ?
> 2 - Why is the Update method called twice if I select an item (once in
> ListBoxBaseItem::Select and once in ListBox::SelectItem).
> 
> Thank you very mutch for your attention.
> 
> Guillaume.
> 
> 
> 
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