[dolphin] [Bug 495637] New: Permit disabling previews at sizes below a threshold and/or in views

[Roke Julian Lockhart Beedell]

https://bugs.kde.org/show_bug.cgi?id=495637

            Bug ID: 495637
           Summary: Permit disabling previews at sizes below a threshold
                    and/or in views
    Classification: Applications
           Product: dolphin
           Version: 24.08.2
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: view-engine: details mode
          Assignee: dolphin-bugs-null at kde.org
          Reporter: 4wy78uwh at rokejulianlockhart.addy.io
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
-------

Currently, I have my preview preferences set as [this
screenshot](https://discuss-cdn.kde.org/uploads/default/original/2X/3/32dea4b70f46721f931f145a8ee7fbd2a10a0ad0.png)
depicts - all are enabled.

Although I’d like having a simple toggle to enable or disable all of them,
having all options individually enabled works incredibly well in the Icons
view. However, it’s actually an annoyance in Compact and Details, because the
icons which it replaces would alternatively provide a more obvious distinction
between file types than the incredibly small - and consequently useless -
previews do.

STEPS TO REPRODUCE
------------------

1. Invoke `dolphin`.
2. Access the "Configure" entry of its menu bar.
3. Access the "Configure Dolphin..."-labelled context menu entry.
4. Access the "Interface" sidebar tab.
5. Access the "Previews" tab bar tab.
6. Enable all.
7. Close the "Configure" window.
8. Switch to the "Details" view.
9. Configure the "Details" view to render icons at their smallest size (for me,
16 px).

OBSERVED RESULT
---------------

Previews render at 16 pixels of size, which is useless.

EXPECTED RESULT
---------------

I should be able to disable previews for this view at this icon size, so that I
can instead see the icons of the file types (since the previews are too small
to be readable).

SOFTWARE/OS VERSIONS
--------------------

> ```YAML
> Operating System: Fedora Linux 40
> KDE Plasma Version: 6.2.2
> KDE Frameworks Version: 6.7.0
> Qt Version: 6.7.2
> Kernel Version: 6.11.5-200.fc40.x86_64 (64-bit)
> Graphics Platform: Wayland
> Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor
> Memory: 30.4 GiB of RAM
> Graphics Processor: AMD Radeon RX 5700
> Manufacturer: ASRock
> Product Name: X670E Taichi
> ```

ADDITIONAL INFORMATION
----------------------

I originally asked whether this was possible to achieve without modifications
to Dolphin's source code at
[`discuss.kde.org`](https://discuss.kde.org/t/can-previews-in-dolphin-be-disabled-when-theyre-too-small-to-be-of-use/24508?u=rokejulianlockhart).

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