How to best show/highlight series values that are hitting min/max limits?

[X-ray]

We often show process values/parameters using multiple Line series:

Capture.PNG (213.53 KiB) Viewed 13070 times

Now we want to highlight values per Line series that are outside certain user given min/max limits. Is there a TChart Tool or a certain Series for that, or do we need to develop our own tool for that? Like drawing something on the Canvas in the OnAfterDraw event of the Chart etc.

[Yeray]

Hello,

I believe you are trying to achieve something very similar to what was discussed in this thread.
Take a look at the example here.

[X-ray]

Hello Yeray,

Thanks for the Tip, but all these lines add too much "Noise" to the graphics. I am now creating an extra TPointSeries that contains the violating Points as Yellow semitransparent circles. So the graphics only gets more populated with "stuff" in case there are min/max violations.

CaptureNew.PNG (245.7 KiB) Viewed 13032 times

But maybe I will use your tip for some other purpose.

Thanks and best regards,

Thomas

[Yeray]

Hello,

Of course drawing the horizontal threshold line(s) is just an option.
Also note it's simpler if you only want to draw pointers where the values are out of the range; the tricky part in that example was to change the line pen between the in-range and the out-range points.