Editing setTimerEvent - FilterMeisterWiki

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= setTimerEvent =

== Syntax ==
{{int setTimerEvent(int nr, int t, int state)}}

== Arguments ==
:'''nr'''
::Timer number. Values from 0 to 9 are allowed.
:'''t'''
::Time in milliseconds. Determines how often a timer is triggered. For a value of 1000, the timer is triggered every second.
:'''state'''
::Set to 1 for activated and to 0 for deactivated.

== Return ==
If the function fails to create a timer, the return value is zero, otherwise it is nonzero.

== Description ==
Lets you activate or deactivate one of 10 available timers. When activated, the timer will trigger an ((FME_TIMER)) event every ''t'' milliseconds until the timer is deactivated again. The possibilities are unlimited with this function. You can use it to e.g. program a stopwatch (see Example below), display a flicker-free animation, perform asynchronous and multi-threaded-like tasks, stop a running calculation after a certain time period.

== Example ==
<code>
%ffp

ctl(0): STATICTEXT, Size=(140,10)
ctl(1): STATICTEXT, Size=(140,10)
ctl(3): PUSHBUTTON, Text="Start", Size=(50,15)
ctl(5): PUSHBUTTON, Text="Stop", Size=(50,15)

OnCtl(n): 
{
  int r;
  static int count0, count1;
	
  if (n==0 && e == FME_TIMER)  {

count0++;
    setCtlTextv(1, "%d ms", count0*10);

} else if (n==1 && e == FME_TIMER)  {

count1++;
    setCtlTextv(0, "%d seconds", count1);		
		
  } else if (n==3 && e == FME_CLICKED){

setCtlText (0,"");
    setTimerEvent(0,10,1);
    setTimerEvent(1,1000,1);

} else if (n==5 && e == FME_CLICKED){
    count0 = count1 = 0;
    setTimerEvent(0,0,0);
    setTimerEvent(1,0,0);
  }
	
  return true;
}
</code>

== See Also ==
((FME_TIMER))

== Comments ==
Everyone can add his comments about his experiences with this function here. Tips for using it are welcome, too.

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