Re: GTK Drag'n'Drop problem

[Syed Akbar <syed_akbar gmx net>]

Am 24.02.2014 23:34, schrieb Lanoxx:
> Hello Syed,
>
> On 23/02/14 13:48, Syed Akbar wrote:
> > Am 23.02.2014 12:13, schrieb John Emmas:
> > > On 23/02/2014 10:55, Syed Akbar wrote:
> > > > I am able to provoke the error purposefully as desired (just starting
> > > > and closing Kaspersky). I then decided to try to solve it on my own
> > > > although I am no expert in C/GTK/Win32 development.
> > > Hi Syed,
> > >
> > > Unfortunately, I'm not on the GTK+ development team so I probably
> > > won't be able to help much.  However, it might be useful to the devs
> > > if you could provide a bit more information.
> > Thanks anyway for your answer.  Actually I already provided all
> > information I have (see previous mails). But I can try to state it more
> > precisely.
> >
> >
> > > For example, does GTK's DND completely stop working once you launch
> > > those other utilities or is there a more subtle problem?
> > The drop destination is not recognized anymore. But you can still grab a
> > source and drag it off. But you can see that while moving the source
> > object over the destination, that it is not identified as a valid drop
> > target.
> I am also not an expert for this, but I remember from when I wrote a
> drag and drop application once, that each drag and drop source and
> target both get a list of types and the d&d source has to match the
> target type. For example you can declare an event box as a drag target
> and then declare that it accepts everything that is of type URL or
> String. When you then drag something else on it (say an image), then the
> box wont be a valid target. I hope I didnt write something wrong.
>
> Anyway, could it be that these applications somehow interfere with the
> drag and drop system of windows and change the type of the dragged
> source to something else?

I really still don't know where exactly the error is. Of course there 
might be manipulations that corrupt the relevant dnd destination 
matching information.

There must be a position where "event->dnd.type" is set to 
"GDK_DROP_START", but I can't find the correct place. Anyway, when 
Kasperky/TuneUp/Camtasia is running, event->dnd.type is never set to the 
correct value.


> > > Also, what are your drag source and destination?  Are you dragging &
> > > dropping entirely within some GTK+ app?  Or are you dragging from a
> > > GTK+ app to some external Windows app (e.g. Windows Explorer) or the
> > > other way around?
> > I only tested internal dragging. For debugging I used this demo dnd
> > application: https://wiki.gnome.org/GnomeLove/DragNDropTutorial
> Regards
> Sebastian
> > You're more likely to get assistance if you can describe the problem
> > very accurately.
> >
> > John
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