Hey super helpful and awesome SciCharts gurus,
I’m trying to create a graph that has usable data in a specific range, say 80-100, and I’m wondering if there is a way to lock the y axis range absolutely? This would override any kind of updating that ZoomPan or other modifiers might try to do.
Yes, there is a way to do this.
Check out the ViewPortManager feature. This is a back-door API into the chart which allows you to intercept VisibleRange changes during the render pass. If you create a custom DefaultViewportManagerBase and put breakpoints in the methods you will see where this is called – basically any time the chart renders.
You can keep a ViewportManager in your ViewModel and bind it to SciChartSurface.ViewportManager, that way when you append data or have a disconnection issue you could set a flag on your custom viewport manager to freeze the VisibleRange for a specific axis.
Also, you may not be aware but many of the modifiers have flags to restrict action to just X or just Y direction, e.g. see here: http://http://www.scichart.com/Abt.Controls.SciChart.SL.ExampleTestPage.html#/Abt.Controls.SciChart.Example;component/Examples/IWantTo/ZoomAndPanAChart/MouseDragToPanXOrY.xaml
I hope this helps!
Sounds to me all you need is to set Axis.AutoRange = AutoRange.Never, in combination with an Axis.VisibleRange.
Our default autorange method tries to range on startup then never does again. In most cases this is fine but ‘AutoRange.Never’ disables it.
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