Selecting points within a drawn polygon

Answered

Hi there,

I am currently evaluating SciChart for use within a new piece of software we are developing. One important feature that we need to provide is to be able to draw a polygon and determine which points are contained within it. Then the colour, visibility, etc of these points can be changed. I can see from your documentation that this could be achieved by creating a custom chart modifier to draw lines that make up the shape and then implement my own algorithm to determine which points are contained within it. Before I embark on this route, could you tell me if I have missed any implementation that already exists? Will the drawn polygon zoom and pan with the graph, therefore enclosing the same points?

Kind Regards,

Kathryn

WPF ChartModifierBase RenderContext Selection

Kathryb Cooper asked 10 years ago

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Answers (3)

Best Answer

Update, SciChart v4, Feb 2016

We now natively support Data-Point Selection in sciChart WPF v4:

SciChart PointMarker Selection Example

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Please see the DataPointSelectionModifier example for more details.

Andrew Burnett-Thompson answered 9 years ago

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Hi Kathryn,

We’ve extended our Custom ChartModifiers sample to include data-point selection via mouse drag. This is fresh off the press and we are still proof reading it, but if you take a look at the article ChartModifiers Part 5 – Select Data Points via Mouse Drag you will find a how-to guide.

SciChart Select DataPoints via mouse

Best regards,
Andrew

Andrew Burnett-Thompson answered 10 years ago
last edited 10 years ago

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Many thanks for answering my question so quickly and comprehensively!

Kathryb Cooper answered 10 years ago

- Andrew Burnett-Thompson
- 10 years ago
It was asked many many times, and we finally had the time to create an example (or finally cracked due to weight of number of requests). Glad it helped! Andrew