From bd92f6c8ccb04c563b4425a0c62f01199096459d Mon Sep 17 00:00:00 2001
From: Sam Anklesaria <sam@Tintin.local>
Date: Sun, 3 May 2009 11:48:28 -0500
Subject: [PATCH] separated behaviors and events in frp

---
 extra/ui/frp/frp.factor | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/extra/ui/frp/frp.factor b/extra/ui/frp/frp.factor
index aa7c44ee03..f972a3f805 100644
--- a/extra/ui/frp/frp.factor
+++ b/extra/ui/frp/frp.factor
@@ -1,7 +1,7 @@
-USING: accessors arrays colors fonts fry kernel models
+USING: accessors arrays colors fonts kernel models
 models.product monads sequences ui.gadgets ui.gadgets.buttons
 ui.gadgets.editors ui.gadgets.line-support ui.gadgets.tables
-ui.gadgets.tracks ui.render ;
+ui.gadgets.tracks ui.render ui.gadgets.scrollers ;
 QUALIFIED: make
 IN: ui.frp
 
@@ -27,6 +27,8 @@ M: frp-table row-color color-quot>> [ call( a -- b ) ]  [ drop f ] if* ;
 GENERIC: output-model ( gadget -- model )
 M: gadget output-model model>> ;
 M: frp-table output-model selected-value>> ;
+M: model-field output-model field-model>> ;
+M: scroller output-model children>> first model>> ;
 
 GENERIC: , ( uiitem -- )
 M: gadget , make:, ;
@@ -41,13 +43,16 @@ M: table -> dup , selected-value>> ;
    [ { } make:make ] dip <track> swap [ f track-add ] each ; inline
 : <box*> ( gadgets type -- track ) [ <box> ] [ [ model>> ] map <product> ] bi >>model ; inline
 : <hbox> ( gadgets -- track ) horizontal <box> ; inline
+: <hbox*> ( gadgets -- track ) horizontal <box*> ; inline
 : <vbox> ( gadgets -- track ) vertical <box> ; inline
+: <vbox*> ( gadgets -- track ) vertical <box*> ; inline
 
-! Model utilities
+! !!! Model utilities
 TUPLE: multi-model < model ;
-! M: multi-model model-activated dup model-changed ;
 : <multi-model> ( models kind -- model ) f swap new-model [ [ add-dependency ] curry each ] keep ;
 
+! Events- discrete model utilities
+
 TUPLE: merge-model < multi-model ;
 M: merge-model model-changed [ value>> ] dip set-model ;
 : <merge> ( models -- model ) merge-model <multi-model> ;
@@ -57,15 +62,21 @@ M: filter-model model-changed [ value>> ] dip [ quot>> call( val -- bool ) ] 2ke
    [ set-model ] [ 2drop ] if ;
 : <filter> ( model quot -- filter-model ) [ 1array filter-model <multi-model> ] dip >>quot ;
 
+! Behaviors - continuous model utilities
+
 TUPLE: fold-model < multi-model oldval quot ;
 M: fold-model model-changed [ [ value>> ] [ [ oldval>> ] [ quot>> ] bi ] bi*
    call( val oldval -- newval ) ] keep set-model ;
-: <fold> ( oldval quot model -- model' ) 1array fold-model <multi-model> swap >>quot swap >>oldval ;
+: <fold> ( oldval quot model -- model' ) 1array fold-model <multi-model> swap >>quot
+   swap [ >>oldval ] [ >>value ] bi ;
 
-TUPLE: switch-model < multi-model switcher on ;
-M: switch-model model-changed tuck [ switcher>> = ] 2keep
-   '[ on>> [ _ value>> _ set-model ] when ] [ t swap (>>on) ] if ;
-: switch ( signal1 signal2 -- signal' ) [ 2array switch-model <multi-model> ] keep >>switcher ;
+TUPLE: switch-model < multi-model original switcher on ;
+M: switch-model model-changed 2dup switcher>> =
+   [ [ value>> ] [ t >>on ] bi* set-model ]
+   [ dup on>> [ 2drop ] [ [ value>> ] dip set-model ] if ] if ;
+M: switch-model model-activated [ original>> ] keep model-changed ;
+: switch ( signal1 signal2 -- signal' ) [ 2array switch-model <multi-model> ] 2keep
+   [ >>original ] [ >>switcher ] bi* ;
 
 TUPLE: mapped < model model quot ;
 
@@ -87,4 +98,4 @@ INSTANCE: gadget-monad monad
 INSTANCE: gadget monad
 M: gadget monad-of drop gadget-monad ;
 M: gadget-monad return drop <gadget> swap >>model ;
-M: gadget >>= model>> '[ _ swap call( x -- y ) ] ; 
\ No newline at end of file
+M: gadget >>= output-model [ swap call( x -- y ) ] curry ; 
\ No newline at end of file