[Digikam-devel] [digikam] [Bug 323498] New: (Some) Image Editor Color tools hang when starting them

[xilef4040 at gmail.com]

https://bugs.kde.org/show_bug.cgi?id=323498

            Bug ID: 323498
           Summary: (Some) Image Editor Color tools hang when starting
                    them
    Classification: Unclassified
           Product: digikam
           Version: 3.3.0
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: Image Editor
          Assignee: digikam-devel at kde.org
          Reporter: xilef4040 at gmail.com

Since updating digiKam to v3.3.0 I can no longer open the following tools in
the Image Editor:
- Brightness, Contrast, Gamma
- Hue, Saturation, Lightness
- Color Balance
- Level Adjust
- Color Negative
- Black White
- White Balance
- Color Effects
They just hang with 0% progress. 

Especially adjusting the bridghtness belongs to the features of the Image
Editor I and probably others use most. Please fix this.

Reproducible: Always

Steps to Reproduce:
1. Load any image in the image editor.
2. Select Tool -> Brightness, Gamma, Contrast
Actual Results:  
The cursor indicates loading. The progress bar in the lower left corner reads
0%. The tool panel on the right opens, but the sliders and buttons are greyed
out. Only "Cancel" can be clicked, which closes the tool. This does not change
even after a few minutes.

Expected Results:  
The tool should load up (in no time).

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