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How to add zoom functionality on chart when finger pinch to zoom

Posted By shweta jain Last Year

How to add zoom functionality on chart when finger pinch to zoom

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shweta jain
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Hello,

Is Nevron chart support finger touch interactivity ?.
I want to add zoom functionality on finger pinch to zoom. Is it possible?
Please suggest some idea for How can I implement this zoom on finger pinch on Nevron chart.

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Hi Sweta,

The control does not have touch support for interactivity operations yet. You generally have to implement custom zooming in response to touch events.

Best Regards,
Nevron Support Team



shweta jain
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Hello,
 Is it possible to control zoom control like by passing zoom in percentage on specified value?
Can u Please provide some code/reference related to how to implement custom zoom on chart?

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Hi Shweta,
The following code shows how to zoom in to a specified range on a particular axis:
NChart chart = nChartControl1.Charts[0];

NBarSeries bar = new NBarSeries();
chart.Series.Add(bar);

bar.DataLabelStyle.Visible = false;

bar.Values.Add(10);
bar.Values.Add(20);
bar.Values.Add(30);

// make sure all internal values are updated
nChartControl1.RecalcLayout();

// zoom in
NNumericAxisPagingView view = new NNumericAxisPagingView();
chart.Axis(StandardAxis.PrimaryX).PagingView = view;
view.ZoomIn(new NRange1DD(0.5, 1.5), 0);

Zooming this way (instead of using the NRangeAxisView) ensures you can also activate scrolling/panning later. We hope this helps - let us know if you have any questions.


Best Regards,
Nevron Support Team





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