close

Passing a value between Pre and Post event handler using XppPrePostArgs:

public static class MyTableEventHandler_XppPrePostArgs
{
    const static str myFieldHasChangedArgName = 'myFieldHasChanged';

    [PreHandlerFor(tableStr(MyTable), tableMethodStr(MyTable, update))]
    public static void MyTable_Pre_update(XppPrePostArgs _args)
    {
        MyTable myTable = _args.getThis() as MyTable;

        boolean myFieldHasChanged = myTable.MyField != myTable.orig().MyField;

        <strong>_args.addArg(MyTableEventHandler_XppPrePostArgs::myFieldHasChangedArgName, myFieldHasChanged);</strong>
    }

    [PostHandlerFor(tableStr(MyTable), tableMethodStr(MyTable, update))]
    public static void MyTable_Post_update(XppPrePostArgs _args)
    {
        MyTable myTable = _args.getThis() as MyTable;

        <strong>boolean myFieldHasChanged = _args.getArg(MyTableEventHandler_XppPrePostArgs::myFieldHasChangedArgName);
</strong>
        if (myFieldHasChanged)
        {
            myTable.doStuff();
        }
    }
}
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