Seems to be special stuff with controls - sigh.
When breaking in svx\source\sdr\contact\objectcontactofpageview.cxx:290 in line
pProcessor2D->process(xPrimitiveSequence);
it can be seen that the ViewInformation2D from *this and at the processor is
the same, while later in LazyControlCreationPrimitive2D::get2DDecomposition it
is *different*.
This is because the processed SeqOfPrim modifies it - in
VclProcessor2D::RenderTransformPrimitive2D. This means the ControlPrimitive
itself contains the offset (in my local example '30' which leads to a pixel
offset of 1.0889). Forcing this to zero silences the repaint.
Thus the question is: Who and why does someone create a
TransformPrimitive2D? There are probably good reasons, so maybe we get a
principal problem here...?
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https://bugs.launchpad.net/bugs/1846940
Title:
[upstream] Loop in libreoffice-calc when scrolling to top of
spreadsheet
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