[digikam] [Bug 372640] New: Can't drag any image file from digikam to GIMP

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https://bugs.kde.org/show_bug.cgi?id=372640

            Bug ID: 372640
           Summary: Can't drag any image file from digikam to GIMP
           Product: digikam
           Version: 5.3.0
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: grave
          Priority: NOR
         Component: Kipiinterface
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

When I try to drag any image file from Digikam to GIMP, a "Prohibited" mouse
pointer appears, so I CAN'T drop any image from Digikam to GIMP. However, drag
and drop works fine from Gwenview or Dolphin to GIMP. I saw this issue is
pretend to be solved (bug 22286 from 2001) but it's not.

However, I can drag from Digikam to Krita, so is like there were compatibility
issues still in 2016!!!!

I'm using KDE 5.8 on OpenSUSE.

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alexeyputz <[hidden email]> changed:

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--- Comment #1 from alexeyputz <[hidden email]> ---
I tried, and I can confirm the issue.

GIMP 2.8.18

digiKam
Version 4.14.0
Using KDE Development Platform 4.14.22


Kubuntu 16.10
KDE Plasma Version : 5.7.5
KDE Frameworks Version : 5.26.0
Qt Version : 5.6.1
Kernel Version : 4.8.0-22-generic
OS Type: 64-bit

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          Component|Kipiinterface               |Usability

--- Comment #2 from [hidden email] ---
Can you drag and drop from Dolphin file manager or Gwenview to Gimp ?

Note : testing with DK 4 is not valid, as it's based on Qt4 and is not
maintained. DK 5 is the main implementation now and is based on Qt5 which can
have serious difference about D&D. this last one is managed by Qt in fact in
background.

Gilles Caulier

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--- Comment #3 from [hidden email] ---
DK and Krita are based on Qt5.

Gimp is GTK stuff.

Qt manage the D&D through the XDND standard.

Look "Interoperating with Other Applications" section for details.

http://doc.qt.io/qt-5/dnd.html

So the question is : Gimp support XDND ?

Gilles Caulier

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--- Comment #4 from Alexey Putz <[hidden email]> ---
I suppose that GIMP do support XDND.
Found a quote about XDND:
XDND defines a standard for drag and drop on X11. It is implemented by GTK+.

Dragging from Dolphin to GIMP do work.
About Gwenview, I wasn't able to drag from it as far as primary tool in this
program is "navigating" hand, and it doesn't drag anything.

GIMP 2.8.18

Dolphin 16.04.3

Kubuntu 16.10
KDE Plasma Version : 5.7.5
KDE Frameworks Version : 5.26.0
Qt Version : 5.6.1
Kernel Version : 4.8.0-22-generic
OS Type: 64-bit

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Rafael <[hidden email]> changed:

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--- Comment #5 from Rafael <[hidden email]> ---
> About Gwenview, I wasn't able to drag from it as far as primary tool in this
> program is "navigating" hand, and it doesn't drag anything.
Well, Gwenview is the "smaller brother" of Digikam, that's to say, you can
explore image thumbnails and manipulate them, or view them. If you hit "ESC"
key in Gwenview, you will see images thumbnails.

>
> GIMP 2.8.18
>
> Dolphin 16.04.3
>
> Kubuntu 16.10
> KDE Plasma Version : 5.7.5
> KDE Frameworks Version : 5.26.0
> Qt Version : 5.6.1
> Kernel Version : 4.8.0-22-generic
> OS Type: 64-bit

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--- Comment #6 from Alexey Putz <[hidden email]> ---
I 've managed to drag from Gwenview 16.04.3 , I just needed to open thumbnail
bar to drag from it.

Digikam 5 is still unable to drag from albums. But can drag to Dolphin from
Digikam 5.

digiKam
Version 5.3.0

Kubuntu 16.10
KDE Plasma Version : 5.7.5
KDE Frameworks Version : 5.26.0
Qt Version : 5.6.1
Kernel Version : 4.8.0-22-generic
OS Type: 64-bit

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--- Comment #7 from Rafael <[hidden email]> ---
Apparentely, is not a GIMP issue

"XDND - Drag-and-Drop Protocol for the X Window System. XDND defines a standard
for drag and drop on X11. It is implemented by GTK+.
See also XDND specification. "

from https://wiki.gimp.org/wiki/Glossary

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--- Comment #8 from [hidden email] ---
I just tested with digiKam AppImage bundle and Gimp. Drag and drop work fine.
You just to drop item from DK into right region of Gimp GUI, typically here :

https://www.flickr.com/photos/digikam/31095559876/in/dateposted-public/

If D&D do not work to Gimp canvas, well it's a problem into Gimp to support
this action at the right place in Gimp Implementation. Why it support well this
action somewhere in Gimp GUI and not in another place ?...

Gilles Caulier

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--- Comment #9 from Rafael <[hidden email]> ---
(In reply to caulier.gilles from comment #8)
> I just tested with digiKam AppImage bundle and Gimp. Drag and drop work
> fine. You just to drop item from DK into right region of Gimp GUI.
>
Digikam 5.3 works on that way too, that's not a problem.

> If D&D do not work to Gimp canvas, well it's a problem into Gimp to support
> this action at the right place in Gimp Implementation. Why it support well
> this action somewhere in Gimp GUI and not in another place ?...

You forgot to try to D&D from Dolphin or Gwenview to GIMP canvas and it works
like a charm. So, why is Digikam failing and not this two programs?

Hi Gilles

> Gilles Caulier

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--- Comment #10 from Rafael <[hidden email]> ---
This maybe will clear more the Digikam issue, cause we can demonstrate is not a
QT vs GTK+ or GIMP application fail. I CAN D&D to GIMP canvas from Krusader,
another QT native file manager like Dolphin, that let us D&D to GIMP canvas.

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Maik Qualmann <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Latest Commit|                            |http://commits.kde.org/digi
                   |                            |kam/cf95a328cdcdd82c63d85dc
                   |                            |bdc4ba5acc0314443
             Status|UNCONFIRMED                 |RESOLVED
   Version Fixed In|                            |5.4.0
         Resolution|---                         |FIXED

--- Comment #11 from Maik Qualmann <[hidden email]> ---
Git commit cf95a328cdcdd82c63d85dcbdc4ba5acc0314443 by Maik Qualmann.
Committed on 20/11/2016 at 21:36.
Pushed by mqualmann into branch 'master'.

set QDrag default drop action to Qt::CopyAction
FIXED-IN: 5.4.0

M  +2    -1    NEWS
M  +1    -1    libs/album/albumtreeview.cpp
M  +1    -1    libs/widgets/common/dragdropimplementations.cpp

http://commits.kde.org/digikam/cf95a328cdcdd82c63d85dcbdc4ba5acc0314443

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           What    |Removed                     |Added
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          Component|Usability                   |Albums-Drag&Drop

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