Method GDK.Image()->grab()

Method grab: GDK.Image grab(GTK.Widget widget, int xoffset, int yoffset, int width, int height)
Description: Call this function to grab a portion of a widget (argument 1) to the image. Grabbing non-toplevel widgets may produce unexpected results. To get the size of a widget use ->xsize() and ->ysize(). To get the offset of the upper left corner of the widget, relative to it's X-window (this is what you want for the offset arguments), use ->xoffset() and ->yoffset().