[Bug 226765] New: Panning with arrow keys in preview mode is slow

https://bugs.kde.org/show_bug.cgi?id=226765

           Summary: Panning with arrow keys in preview mode is slow
           Product: digikam
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           1.2.0svn (using KDE 4.3.5)
OS:                Linux

When panning using arrow keys in preview mode in DigiKam the label "Reduced
Size Preview" is flickering and the whole process is very slow compared to
mouse wheel scrolling.

Julien

--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=226765


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]
          Component|general                     |Preview
            Version|unspecified                 |1.2.0




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2010-02-14 11:47:22 ---
Yes, it's slow because of these line :

http://lxr.kde.org/source/extragear/graphics/digikam/libs/widgets/common/previewwidget.cpp#839

...which call repaint() on viewport. I don't have found a good solution.

In fact the problem is that Qt4 catch keyboard _release_ event in case of key
are not yet released ! I think to use a timer here to prevent this call if
keyReleaseEvent is called too shortly.

Do you understand the problem ?

Gilles

--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=226765





--- Comment #2 from Marcel Wiesweg <marcel wiesweg gmx de>  2010-02-14 14:41:07 ---
So the problem is that many events are sent in a short time?
1) What's the indication to use repaint()? Is update() not possible?
2) Yes, use a timer.

--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Andi Clemens]

https://bugs.kde.org/show_bug.cgi?id=226765





--- Comment #3 from Andi Clemens <andi clemens googlemail com>  2011-07-24 12:47:32 ---
Is this issue fixed? I can not see any slowdown or flickering...

--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=226765


Marcel Wiesweg <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |UNMAINTAINED




--- Comment #4 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-07-24 13:23:10 ---
Code is completely rewritten since then, so I guess we can close.

--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=226765

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |2.0.0

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel