Dynamic Timer Class

This class allows you to wait a specific time (like Sleep) AND maintain a responsive UserInterface (UI).

screen-shot

It works like a:

  While (Now < waitTill) : DoEvents : Wend

- loop but doesn't eat up all your system time like the above loop.

Why not use the Timer Control?

Well first, the timer control ist limited to a maximum 65 second intreval while this timer can handle intervals up to 2147483647 ms (that's just a bit less that 25 days).

Second: with a timer control it is difficult to so something like this:

   ..code runs ...
   Wait 10Secs
   ... continue code ..

Third: This class has a Cancel method to stop waiting a once.

Why should you use the Timer control?

CWaitNDispatch can do some unpretty things to your callstack when running. When you call wait on a timer object and then call wait on another while the first one is still running, the second one won't return until the "first" one has finnished. (See the example in the form).

Usage:

  • Instantiate an object of the class CWaitNDispatch.
  • Call the "Wait" function with the number of milliseconds you want to wait as parameter.
  • Call "Cancel" to stop waiting

ATTENTION:
When you call Cancel from a messagehandler (i.e. Command1_Click, Form_Unload) the code after the "Wait" call will continue AFTER you leave the message handler!

So don't call cancel in the Unload event because your app will not terminate then.

Call Cancel in QueryUnload and set the Cancel parameter of QueryUnload to true if timer.IsWaiting returns true.

Download Zipped TimerClass (18k)



Comments

  • There is an end to wait

    Posted by Legacy on 06/19/2002 12:00am

    Originally posted by: sandy

    Thanks buddy,

    You really ended my waiting ..to finish the rpoject..
    it works perfect...
    sandy

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • U.S. companies are desperately trying to recruit and hire skilled software engineers and developers, but there is simply not enough quality talent to go around. Tiempo Development is a nearshore software development company. Our headquarters are in AZ, but we are a pioneer and leader in outsourcing to Mexico, based on our three software development centers there. We have a proven process and we are experts at providing our customers with powerful solutions. We transform ideas into reality.

  • When individual departments procure cloud service for their own use, they usually don't consider the hazardous organization-wide implications. Read this paper to learn best practices for setting up an internal, IT-based cloud brokerage function that service the entire organization. Find out how this approach enables you to retain top-down visibility and control of network security and manage the impact of cloud traffic on your WAN.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date