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ProgressBar help needed...

 
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jicman



Joined: 22 Dec 2004
Posts: 298
Location: Rochester, NY
PostPosted: Sun Jan 06, 2008 4:16 pm    Post subject: ProgressBar help needed... Reply with quote
Greetings.

I have created these functions,
Code:
  private void DisplayProgressBar(char[] code)
  {
    //msgBox(code);
    if(code == "stop")
    {
      tmr.stop();
      tmr = null;
      //if(pBar.value == pBar.maximum)
      pBar.value = pBar.minimum;
    }
    else if(code == "start")
    {
      pBar.value = 0;
      pBar.minimum = 0;
      pBar.maximum = 50;
      pBar.step = 1;
      tmr = new Timer;
      tmr.interval = 100;
      tmr.tick ~= &tmr_tick;
      tmr.start();
    }
  }
 
  private void tmr_tick(Object sender, EventArgs ea)
  {
    pBar.performStep();
    if(pBar.value == pBar.maximum)
      pBar.value = pBar.minimum;
  }


and when I place these calls inside some functions, as in,
Code:

private void foo()
{
  DisplayProgressBar("start");
  // some more code here that takes longer than the timer interval
  DisplayProgressBar("stop");
}


Though the time to execute foo takes longer than tmr.interval, pBar progress is never executed. But, if I put a msgBox just before the stop call, it displays the progress bar.

This may be because I may not know what the Timer class does.

Any help would be greatly appreciated.

thanks,

jic
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Chris Miller



Joined: 27 Mar 2004
Posts: 514
Location: The Internet
PostPosted: Mon Jan 07, 2008 1:30 pm    Post subject: Re: ProgressBar help needed... Reply with quote
The timers don't use threads, they're just ordinary DFL events. So if you don't return from your events or use doEvents (in a timely fashion), the timer events can't happen. It's similar to the previous problem you had when your GUI wouldn't show changes.
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jicman



Joined: 22 Dec 2004
Posts: 298
Location: Rochester, NY
PostPosted: Tue Jan 08, 2008 10:22 pm    Post subject: Reply with quote
Thanks, Chris.

jose
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