https://bugs.kde.org/show_bug.cgi?id=400735

            Bug ID: 400735
           Summary: dragging sliders on bin effects spams undo history
           Product: kdenlive
           Version: 18.04.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Effects & Transitions
          Assignee: vpi...@kde.org
          Reporter: kde-b...@adamspiers.org
  Target Milestone: ---

SUMMARY

Dragging sliders on bin effects with the mouse spams the undo history with an
unnecessary number of "Edit Bin Effect" events.

STEPS TO REPRODUCE
1. View > Undo History should be checked
2. Select a clip in the project bin
3. Click to enable Bin effects in the Properties window
4. Add an effect with a slider to the clip, e.g. Contrast
5. Drag the effect slider

OBSERVED RESULT

Undo History window fills up quickly, with a new "Edit Bin Effect" entry for
every new value during the drag.

EXPECTED RESULT

Same behaviour as normal (non-bin) effects, with only a single entry in the
undo history.

SOFTWARE VERSIONS

kdenlive version: 18.04.3
KDE Plasma version: 5.12.5
Qt version: 5.9.4

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