[umbrello] [Bug 144402] group select - drag destroys text positions

[Martin M]

https://bugs.kde.org/show_bug.cgi?id=144402

--- Comment #6 from Martin M <martin.meitzner at gmx.net> ---
Funny enough, even after all those years the problem seems to persist.

I haven't done UML for ages, but a quick fiddle round with some elements, a
label and a box around all (maybe leave one element unselected so drag&drop
works) makes the label disappear or get repositioned somewhere seemingly
random.

But it only seems to be the case upon the very first drag&drop action in a new
diagram! If I put the label back to its place and move everything around, the
label stays in its relative place to the other elements, even when saving and
re-opening the document or Umbrello.

This is in v2.30.3 from the Ubuntu 20.04 resources.

Exact steps to reproduce:

- open a new class diagram (might work with others too)
- place a note somewhere
- place a box and make it contain the note and some extra room
- place a label in the topleft corner of the box
- place another note or element outside the box
- drag a select box around the box (containing the label + note)
- move the selected group

Result: the label jumps to a different position (even disappeared once but I
couldn't reproduce).

Sometimes happens with additionally inserted labels too when they are moved in
a group (for the first time). It's a little erratic though, so I'd doubt this
is intended behaviour.

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