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view tests/focus.ur @ 2160:72fe1cc704c5

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Tag NULLs with their types in SQL, to help the DBMS do type inference
author Adam Chlipala <adam@chlipala.net>
date Sat, 04 Jul 2015 19:24:26 -0400
parents ffd7ed3bc0b7
children
line wrap: on
line source
fun main () : transaction page =
    id1 <- fresh;
    id2 <- fresh;
    s1 <- source "";
    s2 <- source "";
    which <- source False;

    return <xml><body>
      <ctextbox id={id1} source={s1}/>
      <ctextbox id={id2} source={s2}/>
      <button onclick={fn _ => w <- get which;
                          set which (not w);
                          giveFocus (if w then id1 else id2)}/>
    </body></xml>