new
Create a popup layout description.
Used together with method@Gdk.Popup.present to describe how a popup surface should be placed and behave on-screen.
Return
newly created instance of GdkPopupLayout
Parameters
anchorRect
the anchor GdkRectangle to align @surface with
rectAnchor
the point on @anchor_rect to align with @surface's anchor point
surfaceAnchor
the point on @surface to align with @rect's anchor point