Two NSPopover Center vertical to each other

Images do not show here on the forum. So I need t guess.

NSPopover is positioned relative to its parent view.

So to align vertically, you should for instance:

- have top of both parent views aligned

- slect arrow position at top

- if you want full alignment of NSPopover, theit height should be the same.

EDITED

if the parents windows are not aligned on top, then you need some computation

- get t1 and t2 as the top of parent windows.

- if h1 and h2 are the height of the popovers

- naming m1 and m2 the vertical middle of the popovers

m1 = t1 + space + h1 / 2

m2 = t2 + space + h2 / 2

where space is the little space for the arrow

- then you need to satisfy the following equation

m1 = m2,

which means

t1 + space + h1 / 2 = t2 + space + h2 / 2

so

t1 + h1 / 2 = t2 + h2 / 2

- as t1 and t2 are defined, you need to adapt t1 or / and t2 to fit and set the popovers size accordingly when opening