[Bug 185884] New: empty view after clicking the left thumbnail image in Image Editor filter view

https://bugs.kde.org/show_bug.cgi?id=185884

           Summary: empty view after clicking the left thumbnail image in
                    Image Editor filter view
           Product: digikam
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           0.10.0 (rev.: 933374) (using 4.2.00 (KDE 4.2.0), Debian
packages)
Compiler:          cc
OS:                Linux (x86_64) release 2.6.26-1-amd64

i open an image in the image editor
select emboss filter ( play with it a little, you do not have to!)
and then click on some other image in the left thumbnail image bar
which clear the view and does not show anything instead.
(looks like a bug?)

i expect to see the new selected image with the same filter parameters i just
set (for the previous image). OR maybe a different idea for a different
behavior could be suggested ?

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=185884


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |Image Editor
            Version|unspecified                 |0.10.0-svn




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[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=185884


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                 CC|                            |[hidden email]




--- Comment #1 from Marcel Wiesweg <marcel wiesweg gmx de>  2009-03-02 22:48:34 ---
For me it closes the filter and loads the image you clicked. That is the
currently intended behavior (there is a wish to make it so as you describe it).
Can you confirm that the next image is not loaded for you?  What happens if you
click on just another image? And only after emboss plugin?
Anyone else tested this?

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--- Comment #2 from Andi Clemens <andi clemens gmx net>  2009-03-02 22:53:57 ---
For me it closes the filter and opens the newly selected image.

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--- Comment #3 from Nadav Kavalerchik <nadavkav gmail com>  2009-03-03 17:18:47 ---
i was working with a different zoom then 100%
and i found out that the new image is displayed as 1 pixel at zoom 17% (for
example)
when i played with the zoom slider... the image started to appear.

so i guess it should also set the new image zoom level 100% , no matter what
was the previous one

can anyone confirm this ?
(view a very large image in a very small zoom factor 5-10%
and then click on a new small image to not see it at all ?)

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--- Comment #4 from Marcel Wiesweg <marcel wiesweg gmx de>  2009-03-03 21:49:01 ---
Preserving the zoom factor is intentional (in fact there was a bug report that
we did not do it) but obviously it can have this side effect. But zoom factor
is relative: a one pixel image at 17% would not be have an original size of
more than 6px if I see that right?

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--- Comment #5 from Nadav Kavalerchik <nadavkav gmail com>  2009-03-15 09:53:17 ---
i confirm that the initial : "image is disappearing and a blank page is seen"
bug is gone with svn version 933374
but, i think the current filter should be applied to the newly selected image.
maybe you can change this issue to a wish ? instead if a bug.

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--- Comment #6 from Andi Clemens <andi clemens gmx net>  2009-04-17 10:16:29 ---
For me the bug has returned.

1. Open Image Folder in showFoto
2. Select one image, open a filter (don't close or apply it)
3. click onto another image
4. Filter is closed, image is not displayed
5. Click on "Fit to Window", image will reappear.

Andi

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Andi Clemens <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1




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--- Comment #7 from Gilles Caulier <caulier gilles gmail com>  2009-04-17 10:32:19 ---
yes, i remember this dysfunction rarely. difficult to reproduce. Sound like a
race condition with signals/slots in editor core implementation

Gilles

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--- Comment #8 from Andi Clemens <andi clemens gmx net>  2009-04-17 10:43:34 ---
For me it is not rarely, I can reproduce it every time.
I guess you need to have "Fit to Window" toggled and you need to have a filter
WITHOUT zooming capabilities (for example free rotation, decorate filters etc).

Andi

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--- Comment #9 from Mikolaj Machowski <mikmach wp pl>  2009-04-17 16:03:38 ---
For me it also happens, maybe not each time but often. I can get image to show
by resizing left thumbnail bar.

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--- Comment #10 from Marcel Wiesweg <marcel wiesweg gmx de>  2009-04-17 19:21:24 ---
Yes this is absolutely reproducable. Fit to Window need to be toggled on before
opening the filter. I used free rotation. Zoom+ or zoom- brings back the image.
To reproduce again, toggle on Fit to Window.
We need to see if the zoom factor is set wrongly somewhere. It must be in
relation with the Fit to Window functionality.

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--- Comment #11 from Andi Clemens <andi clemens gmx net>  2009-04-18 09:39:36 ---
Another way to check it:

1. Open a folder in the editor with RAW files
2. Fit to Window
3. Open RAW file with the RAW importer
4. Make some changes, click "Import"
5. Image is "gone"...

Most users might think the tool has messed up the image data and therefore does
not display an image.

Andi

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Marcel Wiesweg <[hidden email]> changed:

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




--- Comment #12 from Marcel Wiesweg <marcel wiesweg gmx de>  2009-04-18 17:06:20 ---
SVN commit 955802 by mwiesweg:

Seemingly unrelated to the bug, but it fixes the problem.
calcAutoZoomFactor would wrongly get that the image is valid, and then
calculate auto zoom for an image of size 0. Result is infinity.
For some other reason this was not corrected from slotImageLoaded.
With this change, calcAutoZoom will only use valid values.

BUG: 185884

 M  +2 -1      NEWS  
 M  +1 -1      utilities/imageeditor/canvas/dimginterface.cpp  


WebSVN link: http://websvn.kde.org/?view=rev&revision=955802

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|0.10.0-svn                  |0.10.0




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