How to updated the caller Form/DataSource

If we need to notify events to the caller form we can try this pattern:

In the child form, make a method named updateCaller and invoke it when you want to notify the parent:

void updateCaller()
{
    Common common;
    Object dataSource;
    Object caller;
    ;

    //-----------------------------------
    //We are notifying using the dataSource
    common = element.args().record();
    if (common
        && common.isFormDataSource()
        && formDataSourceHasMethod(common.dataSource(), identifierstr(SomethingWasHappend)))
    {
        dataSource = common.dataSource();
        dataSource.SomethingWasHappend();
    }
    //-----------------------------------

    //-----------------------------------
    //We are notifying using the form
    caller = element.args().caller();
    if (caller
        && classidget(caller) == classnum(SysSetupFormRun)
        && formHasMethod(caller, identifierstr(SomethingWasHappend)))
    {
        caller.SomethingWasHappend();
    }
    //-----------------------------------
}

Implement the handling method in the parent form:

void SomethingWasHappend()
{
    ;
    info("Something was happend (Form)");
}

Or if you prefer, in the DataSource:

void SomethingWasHappend()
{
    ;
    info("Something was happend (DataSource)");
}

Invoking it from a simple button inside the child form:

void clicked()
{
    super();

    element.updateCaller();
}

See a pratical sample in the form MarkupTrans (DataSource -> method write).