Most packing is done by creating boxes. These are invisible widget
containers that we can pack our widgets into which come in two
forms, a horizontal box, and a vertical box. This is the horizontal
one. When packing widgets into a horizontal box, the objects are
inserted horizontally from left to right or right to left depending
on the call used.
GTK2.Hbox(0,0)->add(GTK2.Button("Hello"))->add(GTK2.Button("World"))->pack_end_defaults(GTK2.Button("From right"))->pack_start_defaults(GTK2.Button("From left"))
GTK2.Hbox(1,0)->add(GTK2.Button("Hello"))->add(GTK2.Button("World"))->pack_end_defaults(GTK2.Button("From right"))->pack_start_defaults(GTK2.Button("From left"))
GTK2.Hbox(1,40)->add(GTK2.Button("Hello"))->add(GTK2.Button("World"))->pack_end_defaults(GTK2.Button("From right"))->pack_start_defaults(GTK2.Button("From left"))
GTK2.HandleBox()->set_snap_edge()