* Nothing in the tree and few things outside it used BIG_{SPACING|INSETS};
it seems a value of 15px (at default font size) is not that useful.
There are, however, a lot of things around the tree that use multiples
of 20px. So, make BIG be that, with the intent to replace those
with BIG directly.
* Introduce CORNER_{SPACING|INSETS}. There are a lot of applications
(e.g. Tracker, Terminal, Debugger etc.) which use scroll bar width/height
to metrically align controls with the window frame or with some other
control which contains scroll bars. Rather than have to invoke
BScrollBar or BControlLook directly to get the value, we should just
derive the size of scrollbars from a spacing constant instead
and get rid of the custom function. (For now it is just replaced.)
This reuses the old values for BIG, as it is equal to 14px at default.
* Introduce BORDER_{SPACING|INSETS}. This is equal to the typical border
size of 1px at default font size (or lower) and uses floor() instead of
ciel() to compute what the size should be (i.e. it will remain 1px
at 150%/18pt and only go up at 200%/24pt.) This will allow a lot of
the hardcoded border sizes around the tree and elsewhere to use
ComposeSpacing() instead.
Change-Id: Iaea3fa30364859888e816a9d61ac156268d70758
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5702
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Reviewed-by: nephele <nep@packageloss.eu>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
8672fc2739