https://bugs.documentfoundation.org/show_bug.cgi?id=130991
--- Comment #14 from Jan-Marek Glogowski <glo...@fbihome.de> ---
So I had a look into this, and it's no easy hack. While the arrow now scales,
the assigned drop-down-arrow rectangle doesn't. You can see this in the
attached images, where the arrow is painted out-of-bounds and overlaps with
other widgets. In fact the reported size to the native painting code is always
11px, the TB_DROPDOWNARROWWIDTH. If you highlight the button with the mouse,
you'll see the too small dividing line between the button and the
drop-down-arrow.
This is also visible in my attached images of bug 134054, but that had in
addition a broken implementation of the native button sizing code in the Qt5
VCL backend.
Now interestingly there is some IOS code there, which probably needs some
additional fixup now:
- long nDropDownArrowWidth = TB_DROPDOWNARROWWIDTH;
+ long nDropDownArrowWidth = TB_DROPDOWNARROWWIDTH *
fScaleFactor;
#ifdef IOS
nDropDownArrowWidth *= 3;
#endif
And I don't know if any platform code works around this problem in the VCL
plugin. IMHO that IOS code should be removed too, but since I don't know
anything about IOS, and interested party has to review the (multiple) patches.
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