gdk-window-begin-paint-rect (window rectangle)

window -- a gdk-window object
rectangle -- a gdk-rectangle you intend to draw to

A convenience wrapper around the function gdk-window-begin-paint-region which creates a rectangular region for you. See the function gdk-window-begin-paint-region for details. The function gdk-window-begin-paint-rect has been deprecated since version 3.22 and should not be used in newly written code. Use the function gdk-window-begin-draw-frame instead.