Widget.sendExpose

Very rarely-used function. This function is used to emit an expose event on a widget. This function is not normally used directly. The only time it is used is when propagating an expose event to a windowless child widget (gtk.widget.Widget.getHasWindow is false), and that is normally done using gtk.container.Container.propagateDraw.

If you want to force an area of a window to be redrawn, use gdk.window.Window.invalidateRect or gdk.window.Window.invalidateRegion. To cause the redraw to be done immediately, follow that call with a call to gdk.window.Window.processUpdates.