[Digikam-devel] [Bug 241799] New: Digikam: marked images makes scrolling slow

[Thomas Damgaard]

https://bugs.kde.org/show_bug.cgi?id=241799

           Summary: Digikam: marked images makes scrolling slow
           Product: digikam
           Version: 1.2.0
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel at kde.org
        ReportedBy: thomasdn at gmail.com


Version:           1.2.0 (using KDE 4.2.2) 
OS:                Linux

When I have multiple images marked in an album, scrolling down/up becomes very
slow. It seems that Digikam repaints all the marked thumbnails several times
while scrolling (they blink), while the unmarked thumbnails are not redrawn
(does not blink during scroll).



Reproducible: Always

Steps to Reproduce:
 * Open Digikam
 * Go to an album with several images (mine had a few hundred)
 * Scroll up and down
 * Take note of the responsiveness while scrolling.
 * Now, mark half of them by dragging a rectangle with the mouse
 * Use the scroll wheel to scroll down.
 * Note that the scrolling is much more unresponsive than without images
marked.

Actual Results:  
Scrolling becomes slow

Expected Results:  
Scrolling with marked images should be just as fast as with no images marked.

I use Kubuntu 10.04 with nouveau driver.
Hardware is:
Thinkpad T61p
2.5 GHz Core 2 Duo
4 GB RAM
Linux malbec 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 22:02:19 UTC 2010 i686
GNU/Linux

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