Question

I wonder if that would be possible:

During an event I would like to check certain condition, if that condition is true, I would like to cancel the event right away.

In the case below, if this condition is met, I would like to disallow the user of sorting the table at all.

$(table).bind("sortBegin",function(e, table) { 
   if(condition_is_met){
     // ?? How to cancel the sortBegin?
   }

});

Is something like this possible in jquery?

Update:

Apologies,

1)I thought tagging tablesorter would be clear enough to indicate which plugin I am using. 😉 Anyway tablesorter it is. Thanks

2) I would like to disallow sorting of any kind until the condition isn’t met anymore. I don’t mind if the whole table would be stopped from sorting or only the current event.

Answer 1

Unfortunately the plugin didn’t think about preventDefault – you either need to modify it or throw an exception to abort the
call stack, which should be effectively the same as a well supported preventDefault but uglier.

$(table).bind("sortBegin",function(e, table) { 
   if(condition_is_met){
     throw new Error("");
   }

});

IIRC, .trigger() in jQuery works synchronously, if this is true then this will work.

If you want to modify the plugin, this is how you can add support for preventDefault:

var e = $.Event( "sortBegin" );
$this.trigger(e, $t0);
if( !e.isDefaultPrevented() ) {
    setTimeout(function(){
        // set css for headers
        setHeadersCss($t0);
        multisort($t0);
        appendToTable($t0);
    }, 1);
}

Now when the client of the code calls e.preventDefault() in a sortBegin-event, the plugin would not proceed with sorting.