84 lines
2.2 KiB
Factor
84 lines
2.2 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
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USING: alien generic kernel lists math namespaces sdl sdl-event
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sdl-video ;
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DEFER: pick-up
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: pick-up-list ( point list -- gadget )
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dup [
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2dup car pick-up dup [
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2nip
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] [
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drop cdr pick-up-list
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] ifte
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] [
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2drop f
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] ifte ;
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: pick-up* ( point gadget -- gadget/t )
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#! The logic is thus. If the point is definately outside the
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#! box, return f. Otherwise, see if the point is contained
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#! in any subgadget. If not, see if it is contained in the
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#! box delegate.
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2dup inside? [
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2dup [ translate ] keep
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gadget-children pick-up-list dup [
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2nip
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] [
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3drop t
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] ifte
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] [
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2drop f
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] ifte ;
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: pick-up ( point gadget -- gadget )
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#! pick-up* returns t to mean 'this gadget', avoiding the
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#! exposed facade issue.
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tuck pick-up* dup t = [ drop ] [ nip ] ifte ;
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DEFER: world
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! The hand is a special gadget that holds mouse position and
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! mouse button click state. The hand's parent is the world, but
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! it is special in that the world does not list it as part of
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! its contents.
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TUPLE: hand click-pos clicked buttons gadget delegate ;
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C: hand ( world -- hand )
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0 0 0 0 <rectangle> <gadget>
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over set-hand-delegate
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[ set-gadget-parent ] 2keep
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[ set-hand-gadget ] keep ;
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: button/ ( n hand -- )
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dup hand-gadget over set-hand-clicked
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dup shape-pos over set-hand-click-pos
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[ hand-buttons unique ] keep set-hand-buttons ;
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: button\ ( n hand -- )
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[ hand-buttons remove ] keep set-hand-buttons ;
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: fire-leave ( hand gadget -- )
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[ swap shape-pos swap screen-pos - ] keep mouse-leave ;
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: fire-enter ( oldpos hand -- )
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hand-gadget [ screen-pos - ] keep mouse-enter ;
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: update-hand-gadget ( hand -- )
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#! The hand gadget is the gadget under the hand right now.
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dup world get pick-up swap set-hand-gadget ;
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: fire-motion ( hand -- )
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[ motion ] swap hand-gadget handle-gesture ;
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: move-hand ( x y hand -- )
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dup shape-pos >r
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[ move-gadget ] keep
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dup hand-gadget >r
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dup update-hand-gadget
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dup r> fire-leave
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dup fire-motion
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r> swap fire-enter ;
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