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I have a line chart with over 3,000,000 data points. I was hoping to use the SciChartOverview control as the method of zooming and panning. The problem I am running into is that I can only zoom in to about 80,000 points and I would like to zoom in to maybe 3000-8000 points. Is there a property which controls how close the zoom sliders can get or is there some other way to accomplish this?
I hope my description of the issue is clear enough, if not I can post an image.
The distance between SciChartOverview ‘grips’ is hard coded, and limited to the number of pixels available on the screen. Grips have a width of ~10 pixels, so you can never move the two grips closer than this. Otherwise it would be impossible to separate them, or grab the centre area to scroll them. Say your chart is 1000 pixels wide. Therefore it is only possible to zoom in to ~1% of the original data using just the overview. It is not possible to customise this minimum grip distance in the SciChart Scrollbar.
I suggest if you want to zoom further, please use the RubberBandXyZoomModifier, or MouseWheelModifier as this will allow virtually limitless zooming (subject to numeric precision limitations).
Using RubberBand to zoom further is a workable solution.
You may want to consider figuring out some way to make the lay out the handles on the overview such that they could be used to basically zoom in to zero gap between them. Should be doable.
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