Re: GTK TreeView control in Windows (DND issue)

[Doug Blank <doug blank gmail com>]

On Mon, Sep 19, 2011 at 2:55 PM, Dieter Verfaillie
<dieterv optionexplicit be> wrote:
> On 18/09/2011 13:10, John Emmas wrote:
>> On 18 Sep 2011, at 11:54, Dieter Verfaillie wrote:
>>
>>>
>>> Probably best to attach this to some bug report and start marking
>>> the other TreeView DnD related reports as duplicates. Then we have
>>> a bug report to show the maintainers (I think that's the preferred
>>> way of working) and it's shows me mean business here ;)
>>>
>> Can I leave that to you then, Dieter?  It sounds like you're a bit more experienced in that area than I am.
>
> Did some more test last night and this is more general than just
> TreeView DnD being broken. The moment any drag icon is below the
> pointer things break. It's just more evident with TreeView DnD
> because it sets a huge "icon" and explicitly places it at the
> center of the pointer. Other GTK+ widgets' DnD operations do
> not do this AFAIK.
>
> Confirmed our patch fixes other cases of a drag icon being below
> the pointer.
>
> Searched bugzilla and learned somebody else already discovered
> which commit broke DnD behavior. It had a patch to simply
> revert that commit, but that's a no go (loosing the OLE2 DnD
> work that's there, even if not functional, would be a great
> loss IMHO).
>
> Sad there's over 3000 bugs for the GTK+ product in bugzilla. We
> could have saved ourselves some time debugging. Oh wel ;)
>
> So took hold of https://bugzilla.gnome.org/show_bug.cgi?id=616544 ,
> marked duplicates and attached our patch. Then asked for review on
> #win32 (before pestering a GTK+ maintainer on #gtk+).
>
> pbor had some remarks (thanks & fixed), tml dropped by (requested
> by Fridrich). Fridrich made me extremely nervous by doing that!
> I'd rather have respected tml's choice of no longer working on
> the win32 port of GTK+. Got over it though ;)
>
> Had a nice chat with tml, he didn't remember much from the days
> when he committed the patch that broke DnD and didn't see anything
> obviously wrong with the patch we are now proposing to fix it up
> again. Good!
>
> Will go seek a GTK+ maintainer now on #gtk+. Add yourself to the
> CC list of bug #616544 if you want to keep informed, I'll no longer
> notify this list about this particular issue.

Thanks all!

BTW, do you think that these fixes will have any effect on Mac OSX? I
am getting the same behavior there, and am hopeful that we can restore
functionality there too.

-Doug

> Also had a look at forward porting this to gtk3. Sadly, win32 DnD is
> completely broken in new and exciting ways. Something for another day
> though...
>
> mvg,
> Dieter
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