71 lines
2.0 KiB
Factor
71 lines
2.0 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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drop inside?
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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 delegate ;
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C: hand ( world -- hand )
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0 0 <point> <gadget>
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over set-hand-delegate
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[ set-gadget-parent ] keep ;
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: motion-gesture ( gesture hand -- )
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#! Send the gesture to the gadget at the hand's position in
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#! the world.
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world get pick-up handle-gesture ;
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: button-gesture ( gesture hand -- )
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#! Send the gesture to the gadget at the hand's last click
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#! position in the world. This is used to send a button up
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#! to the gadget that was clicked, regardless of the mouse
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#! position at the time of the button up.
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hand-clicked handle-gesture ;
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: button/ ( n hand -- )
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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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