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I think it works if you take out the plot statements form:
if( RAS == 1 ){
<Complex code here>
}
On 12/9/2009 2:43 PM, progster01 wrote:
> Hi.
>
> I'm working a new-to-me corner of the AB universe lately, and I'm having an issue that I don't yet know a solution for. Perhaps someone else has been here before and can point me in the right direction.
>
> I've created a complex chart that requires alot of CPU to calculate and draw.
>
> Using _TRACE() I can see that the chart code is executing approximately once per second. The effect of this is to tie up the CPU.
>
> The nature of this chart is such that I only need to draw it once and I am not interested in updating it a) on every tick, or b) every second.
>
> IOW, I'd basically be satisfied to draw this chart once when I apply the AFL to the pane. (Secondarily, I might want to add a manual refresh button, but that's beside the point at the moment.)
>
> I have tried to put the entire code in a Status() condition like so:
>
> RequestTimedRefresh( 20, onlyvisible = True ) ; // trying to reduce CPU load, but this does not stop the "regular" refresh
>
> RAS = Status( "redrawaction" ) ; // 1 if a timed refresh, else 0
> if( RAS == 1 ){
> <Complex code here>
> }
>
> The goal here is to prevent any "automatic" refreshes, and allow me to specify a (much less frequent) TimedRefresh.
>
> What I observe to happen in this case is that the chart paints (quickly) at the TimedRefresh frequency, then disappears (goes blank, to the background color) until the next TimedRefresh.
>
> So, I'm currently stuck at either seeing the chart and paying the price for constant refreshes, or having a flashing/disappearing chart which is useless (but cheap!).
>
> Thus the question, in a nutshell:
>
> How to Draw a Chart Just Once?
>
> (and not have it disappear on you).
>
> Thanks to anyone who can shed some light on this for me!
>
>
>
>
>
>
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