[Bug 173790] New: edit previews happen too soon in showphoto

[Ryan McCoskrie]

http://bugs.kde.org/show_bug.cgi?id=173790

           Summary: edit previews happen too soon in showphoto
           Product: digikam
           Version: unspecified
          Platform: Fedora RPMs
        OS/Version: unspecified
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           0.93 (using KDE 4.0.5)
Installed from:    Fedora RPMs

There should be a slight delay before showphoto (digikam as well most likely)
updates preview windows or have an actual 'update preview' button so that the
program knows that the change is what the user really wants.

This issue comes up when users make slight adjustments on edit tools(i.e a
slight adjustment of thresh hold on the unsharp mask
tool) in sequence or by accident.

Showphoto will for several seconds refuse any input and crunch out maths with
the wrong variables. When this happens several times in a row it becomes very
frustrating and counter productive.


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[Gilles Caulier-4]

http://bugs.kde.org/show_bug.cgi?id=173790


Gilles Caulier caulier gilles gmail com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |general
            Product|digikam                     |showfoto
            Version|unspecified                 |0.8.0




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2008-10-29 06:16:47 ---
lease, can you describe better the problem, because i think that it have been
fixed in 0.9.5 and 0.10.0, but i'm bot sure?

Gilles Caulier


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--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2008-12-10 19:30:13 ---
Ryan,

This file still valid using showfoto for KDE4 ?

Andi, Mik,

Can you reproduce (and understand) this problem ?

Gilles Caulier


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--- Comment #3 from Andi Clemens <andi clemens gmx net>  2008-12-10 19:40:44 ---
He is talking about that some effects will render immediately when changing
settings (for example the blur amount slider). Some imageplugins take quite a
while, so this can be annoying.

Andi


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--- Comment #4 from Gilles Caulier <caulier gilles gmail com>  2008-12-10 20:10:11 ---
Ok, now i understand.

But for long preview rendering, there are progress bar displayed.

Also, i remember that you have fixed preview rendering event to always use
"Try" button. Right ?

Gilles Caulier


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--- Comment #5 from Andi Clemens <andi clemens gmx net>  2008-12-10 20:14:13 ---
Not in all plugins... only those that consume a lot of rendering time. But at
least every plugin should have a timer, right? So it might not fire directly...
this should be true for every plugin nowadays.


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--- Comment #6 from Gilles Caulier <caulier gilles gmail com>  2008-12-10 20:20:43 ---
It's already the case. A timer is used (500ms) to post an event to refresh
preview when a settings is changed somewhere, especially with slider...

Gilles Caulier


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--- Comment #7 from Mikolaj Machowski <mikmach wp pl>  2008-12-10 23:51:40 ---
I understand: when you make some adjustments in plugin by slider or changing
value by button or moving points in levels/curves digiKam tries to compute
preview almost immediately after change. When you are not very precise with
your movements it can take several tries to achieve good result. And after each
hesitation digiKam starts crunching introducing unnecessary delays.

Is it really 500ms? I have impression this is faster. Also reporter has older
version of digikam where this problem was much worse.

Ryan - could you test with latest digiKam 0.9.4 or even 0.10-beta7? With those
releases I think your report could be marked as INVALID.


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[Ryan McCoskrie]

http://bugs.kde.org/show_bug.cgi?id=173790


Ryan McCoskrie ryan mccoskrie gmail com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED




--- Comment #8 from Ryan McCoskrie <ryan mccoskrie gmail com>  2008-12-11 01:47:56 ---
...I won't change it to INVALID because is a fixed problem even if the
reporting
and fixing were unrelated events.


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[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |showfoto
            Version|0.8.0                       |unspecified
            Product|showfoto                    |digikam

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