43 lines
1.3 KiB
Factor
43 lines
1.3 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 hashtables kernel lists math matrices sdl
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sequences ;
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: action ( gadget gesture -- quot )
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swap gadget-gestures ?hash ;
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: set-action ( gadget quot gesture -- )
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pick gadget-gestures ?set-hash swap set-gadget-gestures ;
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: add-actions ( alist gadget -- )
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swap [ unswons set-action ] each-with ;
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: handle-gesture* ( gesture gadget -- ? )
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tuck gadget-gestures ?hash dup [ call f ] [ 2drop t ] ifte ;
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: handle-gesture ( gesture gadget -- ? )
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#! If a gadget's handle-gesture* generic returns t, the
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#! event was not consumed and is passed on to the gadget's
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#! parent. This word returns t if no gadget handled the
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#! gesture, otherwise returns f.
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[ dupd handle-gesture* ] each-parent nip ;
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: link-action ( gadget to from -- )
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#! When gadget receives 'from' gesture, send a 'to' gesture.
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>r [ swap handle-gesture drop ] cons r> set-action ;
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: user-input ( ch gadget -- ? )
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[ dupd user-input* ] each-parent nip ;
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! Mouse gestures are lists where the first element is one of:
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SYMBOL: motion
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SYMBOL: drag
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SYMBOL: button-up
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SYMBOL: button-down
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SYMBOL: mouse-enter
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SYMBOL: mouse-leave
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SYMBOL: lose-focus
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SYMBOL: gain-focus
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