! Copyright (C) 2006, 2008 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors kernel sequences models ui.gadgets math.geometry.rect ;
IN: ui.gadgets.books

TUPLE: book < gadget ;

: hide-all ( book -- ) gadget-children [ hide-gadget ] each ;

: current-page ( book -- gadget ) [ control-value ] keep nth-gadget ;

M: book model-changed ( model book -- )
    nip
    dup hide-all
    dup current-page show-gadget
    relayout ;

: new-book ( pages model class -- book )
  new-gadget
    swap >>model
    swap add-gadgets ; inline

: <book> ( pages model -- book ) book new-book ;

M: book pref-dim* ( book -- dim ) children>> pref-dims max-dim ;

M: book layout* ( book -- )
   [ dim>> ] [ children>> ] bi [ (>>dim) ] with each ;

M: book focusable-child* ( book -- child/t ) current-page ;