added simple tsv flashcard program

extra/drills/drills.factor

@@ -0,0 +1,41 @@
+USING: accessors arrays cocoa.dialogs combinators continuations
+fry grouping io.encodings.utf8 io.files io.styles kernel math
+math.parser models models.filter models.history namespaces random
+sequences splitting ui ui.gadgets.alerts ui.gadgets.book-extras
+ui.gadgets.books ui.gadgets.buttons ui.gadgets.frames
+ui.gadgets.grids ui.gadgets.labels ui.gadgets.tracks ui.gestures ;
+
+IN: drills
+SYMBOLS: it startLength ;
+: big ( gadget -- gadget ) { "sans-serif" plain 30 } >>font ;
+: card ( model quot -- button ) <filter> <label-control> big [ next ] <book-btn> ;
+: op ( quot str -- gadget ) <label> big swap <book-bevel-btn> ;
+
+: show ( model -- gadget ) dup it set-global [ random ] <filter>
+   { [ [ first ] card ]
+   [ [ [ second ] [ drop [ "malformed input" throw ] "Malformed Input" alert ] recover ] card ]
+   [ '[ |<< [ it get [
+      _ value>> swap remove
+      [ [ it get go-back ] "Drill Complete" alert return ] when-empty
+   ] change-model ] with-return ] "Yes" op ]
+   [ '[ |<< it get _ model-changed ] "No" op ] } cleave
+2array { 1 0 } <track> swap [ 0.5 track-add ] each
+3array <book*> <frame> { 450 175 } >>pref-dim swap @center grid-add
+it get [ length startLength get swap - number>string "/" startLength get number>string 3append ] <filter> <label-control> @bottom grid-add ;
+
+: drill ( -- ) [ 
+   open-panel [
+      [ utf8 file-lines [ "\t" split
+         [ " " split 4 group [ " " join ] map ] map ] map ] map concat dup [ [ first ] [ second ] bi swap 2array ] map append
+         [ length startLength set-global ] keep <history> [ add-history ] [ show ] bi
+      "Got it?" open-window
+   ] when*
+] with-ui ;
+
+
+MAIN: drill
+
+    
+! FIXME: command-line opening
+! TODO: Menu bar
+! TODO: Pious hot-buttons