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Include 'key' type in Grid
author Adam Chlipala <adamc@hcoop.net>
date Tue, 15 Sep 2009 09:45:46 -0400
parents 2422360c78a3
children 37dd42935dad
rev   line source
adamc@915 1 con colMeta' = fn (row :: Type) (t :: Type) =>
adamc@915 2 {Header : string,
adamc@915 3 Project : row -> transaction t,
adamc@915 4 Update : row -> t -> transaction row,
adamc@915 5 Display : t -> xbody,
adamc@915 6 Edit : t -> xbody,
adamc@915 7 Validate : t -> signal bool}
adamc@915 8
adamc@915 9 con colMeta = fn (row :: Type) (global_t :: (Type * Type)) =>
adamc@915 10 {Initialize : transaction global_t.1,
adamc@915 11 Handlers : global_t.1 -> colMeta' row global_t.2}
adamc@915 12
adamc@935 13 con aggregateMeta = fn (row :: Type) (acc :: Type) =>
adamc@935 14 {Initial : acc,
adamc@935 15 Step : row -> acc -> acc,
adamc@935 16 Display : acc -> xbody}
adamc@935 17
adamc@915 18 functor Make(M : sig
adamc@915 19 type row
adamc@936 20 type key
adamc@936 21 val keyOf : row -> key
adamc@936 22
adamc@915 23 val list : transaction (list row)
adamc@915 24 val new : transaction row
adamc@936 25 val save : key -> row -> transaction unit
adamc@936 26 val delete : key -> transaction unit
adamc@915 27
adamc@915 28 con cols :: {(Type * Type)}
adamc@915 29 val cols : $(map (colMeta row) cols)
adamc@915 30
adamc@915 31 val folder : folder cols
adamc@935 32
adamc@935 33 con aggregates :: {Type}
adamc@935 34 val aggregates : $(map (aggregateMeta row) aggregates)
adamc@915 35 end) = struct
adamc@915 36 style tabl
adamc@915 37 style tr
adamc@915 38 style th
adamc@915 39 style td
adamc@915 40
adamc@915 41 fun make (row : M.row) [t] (m : colMeta' M.row t) : transaction t = m.Project row
adamc@915 42
adamc@915 43 fun makeAll cols row = @@Monad.exec [transaction] _ [map snd M.cols]
adamc@915 44 (map2 [fst] [colMeta M.row] [fn p :: (Type * Type) => transaction p.2]
adamc@915 45 (fn [p] data meta => make row [_] (meta.Handlers data))
adamc@915 46 [_] M.folder cols M.cols)
adamc@915 47 (@@Folder.mp [_] [_] M.folder)
adamc@915 48
adamc@915 49 fun addRow cols rows row =
adamc@915 50 rowS <- source row;
adamc@915 51 cols <- makeAll cols row;
adamc@915 52 colsS <- source cols;
adamc@915 53 ud <- source False;
adamc@915 54 Monad.ignore (Dlist.append rows {Row = rowS,
adamc@915 55 Cols = colsS,
adamc@915 56 Updating = ud})
adamc@915 57
adamc@915 58 type grid = {Cols : $(map fst M.cols),
adamc@915 59 Rows : Dlist.dlist {Row : source M.row, Cols : source ($(map snd M.cols)), Updating : source bool}}
adamc@915 60
adamc@915 61 val createMetas = Monad.mapR [colMeta M.row] [fst]
adamc@915 62 (fn [nm :: Name] [p :: (Type * Type)] meta => meta.Initialize)
adamc@915 63 [_] M.folder M.cols
adamc@915 64
adamc@915 65 val grid =
adamc@915 66 cols <- createMetas;
adamc@915 67 rows <- Dlist.create;
adamc@915 68 return {Cols = cols, Rows = rows}
adamc@915 69
adamc@915 70 fun sync {Cols = cols, Rows = rows} =
adamc@915 71 Dlist.clear rows;
adamc@915 72 init <- rpc M.list;
adamc@915 73 List.app (addRow cols rows) init
adamc@915 74
adamc@915 75 fun render grid = <xml>
adamc@915 76 <table class={tabl}>
adamc@915 77 <tr class={tr}>
adamc@915 78 <th/> <th/>
adamc@915 79 {foldRX2 [fst] [colMeta M.row] [_]
adamc@915 80 (fn [nm :: Name] [p :: (Type * Type)] [rest :: {(Type * Type)}] [[nm] ~ rest]
adamc@915 81 data (meta : colMeta M.row p) =>
adamc@915 82 <xml><th class={th}>{[(meta.Handlers data).Header]}</th></xml>)
adamc@915 83 [_] M.folder grid.Cols M.cols}
adamc@915 84 </tr>
adamc@915 85
adamc@915 86 {Dlist.render (fn {Row = rowS, Cols = colsS, Updating = ud} pos =>
adamc@915 87 let
adamc@915 88 val delete =
adamc@915 89 Dlist.delete pos;
adamc@915 90 row <- get rowS;
adamc@936 91 rpc (M.delete (M.keyOf row))
adamc@915 92
adamc@915 93 val update = set ud True
adamc@915 94
adamc@915 95 val cancel =
adamc@915 96 set ud False;
adamc@915 97 row <- get rowS;
adamc@915 98 cols <- makeAll grid.Cols row;
adamc@915 99 set colsS cols
adamc@915 100
adamc@915 101 val save =
adamc@915 102 cols <- get colsS;
adamc@915 103 errors <- Monad.foldR3 [fst] [colMeta M.row] [snd] [fn _ => option string]
adamc@915 104 (fn [nm :: Name] [p :: (Type * Type)] [rest :: {(Type * Type)}]
adamc@915 105 [[nm] ~ rest] data meta v errors =>
adamc@915 106 b <- current ((meta.Handlers data).Validate v);
adamc@915 107 return (if b then
adamc@915 108 errors
adamc@915 109 else
adamc@915 110 case errors of
adamc@915 111 None => Some ((meta.Handlers data).Header)
adamc@915 112 | Some s => Some ((meta.Handlers data).Header
adamc@915 113 ^ ", " ^ s)))
adamc@915 114 None [_] M.folder grid.Cols M.cols cols;
adamc@915 115
adamc@915 116 case errors of
adamc@915 117 Some s => alert ("Can't save because the following columns have invalid values:\n"
adamc@915 118 ^ s)
adamc@915 119 | None =>
adamc@915 120 set ud False;
adamc@915 121 row <- get rowS;
adamc@915 122 row' <- Monad.foldR3 [fst] [colMeta M.row] [snd] [fn _ => M.row]
adamc@915 123 (fn [nm :: Name] [t :: (Type * Type)]
adamc@915 124 [rest :: {(Type * Type)}]
adamc@915 125 [[nm] ~ rest] data meta v row' =>
adamc@915 126 (meta.Handlers data).Update row' v)
adamc@915 127 row [_] M.folder grid.Cols M.cols cols;
adamc@936 128 rpc (M.save (M.keyOf row) row');
adamc@915 129 set rowS row';
adamc@915 130
adamc@915 131 cols <- makeAll grid.Cols row';
adamc@915 132 set colsS cols
adamc@915 133 in
adamc@915 134 <xml><tr class={tr}>
adamc@915 135 <td>
adamc@915 136 <dyn signal={b <- signal ud;
adamc@915 137 return (if b then
adamc@915 138 <xml><button value="Save" onclick={save}/></xml>
adamc@915 139 else
adamc@915 140 <xml><button value="Update" onclick={update}/></xml>)}/>
adamc@915 141 </td>
adamc@915 142 <td><dyn signal={b <- signal ud;
adamc@915 143 return (if b then
adamc@915 144 <xml><button value="Cancel" onclick={cancel}/></xml>
adamc@915 145 else
adamc@915 146 <xml><button value="Delete" onclick={delete}/></xml>)}/>
adamc@915 147 </td>
adamc@915 148
adamc@915 149 <dyn signal={cols <- signal colsS;
adamc@915 150 return (foldRX3 [fst] [colMeta M.row] [snd] [_]
adamc@915 151 (fn [nm :: Name] [t :: (Type * Type)]
adamc@915 152 [rest :: {(Type * Type)}]
adamc@915 153 [[nm] ~ rest] data meta v =>
adamc@915 154 <xml><td class={td}>
adamc@915 155 <dyn signal={b <- signal ud;
adamc@915 156 return (if b then
adamc@915 157 (meta.Handlers data).Edit v
adamc@915 158 else
adamc@915 159 (meta.Handlers data).Display
adamc@915 160 v)}/>
adamc@915 161 <dyn signal={b <- signal ud;
adamc@915 162 if b then
adamc@915 163 valid <-
adamc@915 164 (meta.Handlers data).Validate v;
adamc@915 165 return (if valid then
adamc@915 166 <xml/>
adamc@915 167 else
adamc@915 168 <xml>!</xml>)
adamc@915 169 else
adamc@915 170 return <xml/>}/>
adamc@915 171 </td></xml>)
adamc@915 172 [_] M.folder grid.Cols M.cols cols)}/>
adamc@915 173 </tr></xml>
adamc@915 174 end) grid.Rows}
adamc@915 175 </table>
adamc@915 176
adamc@915 177 <button value="New row" onclick={row <- rpc M.new;
adamc@915 178 addRow grid.Cols grid.Rows row}/>
adamc@915 179 <button value="Refresh" onclick={sync grid}/>
adamc@915 180 </xml>
adamc@915 181 end