[Libreoffice-ux-advise] [Bug 94004] Trend line equation should fit in chart

https://bugs.documentfoundation.org/show_bug.cgi?id=94004

--- Comment #5 from Laurent BP <jumbo4444@yahoo.fr> ---
Created attachment 122134
  --> https://bugs.documentfoundation.org/attachment.cgi?id=122134&action=edit
Screen shot comparison (Gnumeric, Excel, LibO) for same polynomial equation

Looking at Gnumeric (see attached screen shots with default parameter for
Gnumeric, LibO and Excel with the same polynomial equation), where equation
looks smarter, raise two solutions:
- wrap equation if it is too long (solution c) in comment 4)
- reduce number of significant digits in General format: as equation has no
limited width, LibO displays up to 14 significant digits (whereas Gnumeric
limits to 6 and Excel 5) which seems far too much as a default display.

I would then propose, a mix of solution c) and a):
- if equation has Number format (not General format): display equation up to
chart width, then wrap if necessary
- if equation has General format: decrease number of digits down to 6 till
equation width exceed chart width. If equation width still exceed chart width,
then wrap equation.

This will avoid cutting equation (with ellipsis or red triangle).

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