KNOWLEDGE BASE
Log In    |    Knowledge Base    |    4D Home
Tech Tip: Time Display
PRODUCT: 4D | VERSION: | PLATFORM:
Published On: October 29, 1999
Your current browser may not allow you to download the asset. We recommend Mozilla Firefox or Google Chrome.
Log In

It may be useful to display the current time on an input form. In a
contact database, for example, it may be useful to know both the current
time and the time adjusted to the time zone at the contact’s location.

A new command and matching form event in 4D v6.5 make this much easier
than before.



  • Create a non-enterable variable on your form. It is probably best
    placed on the master page – page 0. Format the font, size and color as
    desired. Use the Data Control tab of the Object Properties to format the
    variable for a suitable time display. Give it a suitable name, such as:
    time_CurrentTime
  • Add the following code to your Form Method:

    Case of
    : (Form event=On Load )
    time_CurrentTime:=Current time
    SET TIMER(60)
    : (Form event=On Timer )
    time_CurrentTime:=Current time
    End case

  • When the form is loaded the value for the time display variable is
    set.

  • The SET TIMER command generates an On Timer form event every 60 ticks – a tick is approximately 1/60th of a second.

  • Each time this event is generated it updates the variable displaying
    the time. In the Form Properties dialog, Events tab you need to enable the 'On Timer’ event, otherwise the form will not respond to it, and therefore not update the time.