SciChart® the market leader in Fast WPF Charts, WPF 3D Charts, and now iOS Charting & Android Chart Components

Welcome to the SciChart Community Forums!

Please use the forums below to ask questions about SciChart. Take a moment to read our Question asking guidelines on how to ask a good question and our support policy. We also have a tag=SciChart on Stackoverflow.com where you can earn rep for your questions!

Please note: SciChart team will only answer questions from customers with active support subscriptions. Expired support questions will be ignored. If your support status shows incorrectly, contact us and we will be glad to help.

Answered
0
0

In the Knowledge Base, an article discusses a rollover modifier that utilises a vertical hit test to draw a vertical line at the cursor and highlight the nearest point: http://support.scichart.com/index.php?/Knowledgebase/Article/View/17235/32/custom-chartmodifiers—part-1—creating-a-custom-rollover-modifier

This is perfect for data which moves/is unique along the X axis (such as time series data).

How can I best replicate this modifier for data which moves/is unique along the Y axis? Drawing a horizontal line is easy, but there is no HorizontalSliceHitTest function.

Version
4.2.1
  • You must to post comments
Good Answer
1
0

Hi Rick

Are you talking about a chart which has been rotated using our Flipped / Vertical Charts API? If so, then VerticalSliceHitTest will work in this case as well. Everything gets transformed by 90 degrees.

However, if you are looking for a Horizontal Slice hit-test then I’m afraid one doesn’t exist. The best I can recommend is to use our X-Y Hit-Test API and to search for the nearest X-value at corresponding Y in order to find the closest point.

Best regards,
Andrew

  • Rick C
    I wasn’t referring to a flipped chart, but using one is I guess an acceptable workaround. I tried the X-Y hit-test API approach and didn’t have much success.Taking the VerticalStickyHitTestRolloverModifier (as I renamed the one in the Knowledge Base) and simply drawing a horizontal line instead (thus HorizontalStickyHitTestRolloverModifier) with the caveat that it only works on rotated charts is simple enough, if a little inelegant.
  • You must to post comments
Showing 1 result
Your Answer

Please first to submit.