popup-rect ( visible-rect popup-dim screen-dim -- rect )

Vocabulary

math.rectangles.positioning

Inputs

visible-rect	a rect
popup-dim	a pair of real numbers
screen-dim	a pair of real numbers

Outputs

rect

a rect

Word description

Calculates the position of a popup with a heuristic:

•	The new rectangle must fit inside screen-dim
•	The new rectangle must not obscure visible-rect
•	The child must otherwise be as close as possible to the edges of visible-rect

For example, when displaying a menu, visible-rect is a single point at the mouse location, and when displaying a completion popup, visible-rect contains the bounds of the text element being completed.

Definition

USING: kernel math.rectangles
math.rectangles.positioning.private ;

IN: math.rectangles.positioning

: popup-rect ( visible-rect popup-dim screen-dim -- rect )
    [ adjust-visible-rect ] 2keep [ popup-loc dup ] 2keep
    popup-dim <rect> ;