[Libreoffice-ux-advise] [Bug 116672] The problem of drawing trapezoidal graphs

https://bugs.documentfoundation.org/show_bug.cgi?id=116672

--- Comment #8 from Regina Henschel <rb.henschel@t-online.de> ---
Yes, ODF has the feature to rotate the text. But there are two shortcomings:
1. LibreOffice has no UI for this feature.
2. Import and Export with MS Office does not work. LibreOffice cannot yet
read/write the OOXML text rotations needed for 180° rotation and MS Office
cannot read/write the ODF text rotations.

MS Office has the trapezoid, with the smaller top edge in its presets, not the
one with the smaller edge at bottom, which is currently in LibreOffic's preset.
I don't know why LibreOffice has it, perhaps it was used in MS 97.

If you use LibreOffice's trapezoid or my trapezoid from the attached file and
save to pptx, it has no handle, if you open it in PowerPoint. If saved to odp,
PowerPoint opens it and it has the handle. But if then saved to pptx by
PowerPoint and opened by LibreOffice, the handle is not usable.

If LibreOffice opens a pptx file, it generates a shape of type
"ooxml-trapezoid" with smaller edge at top. If you use this shape in a new
file, which is then exported into the pptx-format, PowerPoint can read it. But
if you use it in a new file and save to odp-format, it has at least the viewBox
bug 76334. PowerPoint will not open it. 

Simple adding the trapezoid from my attached file to the preset might be a
_immediately_ possible solution. All other solutions need a lot of bug fixing
and/or feature implementation.

I have not tested Word or Excel. There might be additional problems.

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