A HbuttonBox is very similar to a Hbox.
The major diffference is that the button box
is made to pack buttons in, and has a few convenience function for
normal button layouts.
GTK.HbuttonBox()->add(GTK.Button("Hello"))->add(GTK.Button("World"))->set_usize(400,30)
GTK.HbuttonBox()->add(GTK.Button("Hello"))->add(GTK.Button("World"))->set_layout(GTK.BUTTONBOX_SPREAD)->set_usize(400,30)
GTK.HbuttonBox()->add(GTK.Button("Hello"))->add(GTK.Button("World"))->set_layout(GTK.BUTTONBOX_EDGE)->set_usize(400,30)
GTK.HbuttonBox()->add(GTK.Button("Hello"))->add(GTK.Button("World"))->set_layout(GTK.BUTTONBOX_START)->set_usize(400,30)
GTK.HbuttonBox()->add(GTK.Button("Hello"))->add(GTK.Button("World"))->set_layout(GTK.BUTTONBOX_END)->set_usize(400,30)
GTK.Hbox()->create()