[Libreoffice-bugs] [Bug 143114] Libclplug: kf5 support errors

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=143114

--- Comment #10 from Armin Le Grand <Armin.Le.Grand at me.com> ---
The three lines from SvTreeListBox::StartDrag originate from
ac7acb0ab1329913b0cec79790adcde0263960be "Merged SvTreeListBox and SvLBox" from
2012-10-11 - pretty old. Thus it originates from "void SvLBox::StartDrag" and
was merged-in to SvTreeListBox::StartDrag. No idea why it was like that in
SvLBox, but it was *not* originally part of SvTreeListBox. This is like that
since 2021, so I will not dig deeper - those three lines may not be needed, but
no direct hints from the past :-(

Basic problem stays that SvTreeListBox::StartDrag (triggered from a MouseMove,
NOT from MouseButton) *always* executes that MouseButtonUp. This should not
happen if SvImpLBox (the EntryList) is actively handling a ButtonAction with
CaptureMouse() being active.
That again is alredady done actively in SvImpLBox::ButtonDownCheckCtrl,
SvImpLBox::MouseMoveCheckCtrl, SvImpLBox::ButtonUpCheckCtrl. Adding a
possibility to *ask/check* for it from SvTreeListBox...

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