48 lines
1.5 KiB
Factor
48 lines
1.5 KiB
Factor
! Copyright (C) 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: gadgets-books
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USING: gadgets gadgets-buttons gadgets-labels gadgets-layouts
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generic kernel lists math matrices namespaces sequences ;
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TUPLE: book page ;
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C: book ( pages -- book )
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<stack> over set-delegate
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0 over set-book-page [ add-gadgets ] keep ;
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M: book layout* ( book -- )
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dup delegate layout*
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dup gadget-children [ f swap set-gadget-visible? ] each
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dup book-page swap gadget-children nth
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[ t swap set-gadget-visible? ] when* ;
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: show-page ( n book -- )
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[ gadget-children length rem ] keep
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[ set-book-page ] keep relayout-1 ;
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: first-page ( book -- ) 0 swap show-page ;
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: prev-page ( book -- ) [ book-page 1- ] keep show-page ;
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: next-page ( book -- ) [ book-page 1+ ] keep show-page ;
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: last-page ( book -- ) -1 swap show-page ;
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TUPLE: book-browser book ;
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: find-book ( gadget -- )
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[ book-browser? ] find-parent book-browser-book ;
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: <book-buttons> ( book -- gadget )
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[
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arrow-|left <polygon-gadget> [ find-book first-page ] <button> ,
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arrow-left <polygon-gadget> [ find-book prev-page ] <button> ,
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arrow-right <polygon-gadget> [ find-book next-page ] <button> ,
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arrow-right| <polygon-gadget> [ find-book last-page ] <button> ,
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] { } make make-shelf ;
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C: book-browser ( book -- gadget )
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<frame> over set-delegate
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<book-buttons> over @top frame-add
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[ 2dup set-book-browser-book @center frame-add ] keep ;
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