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Tag: ZoomExtentsModifier

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1 vote

I am using the MouseWheelZoomModifier and ZoomExtentsModifier on the line chart. Beside double clicking the chart area to Zoom Extents the chart, I would like to add a button outside the chart and this button will trigger the Zoom Extents. Is it possible to do it?

  • Kelly Chan asked 2 years ago
  • last active 2 years ago
1 vote

Looking to try and “link” two timeseries charts when either one is zoomed. The link aspect would be updating the other chart to have the same visible range as the zoomed chart.

Each chart has its visibleRange property updated in response to separate socket events, that happen at similar intervals but different.

Originally, was hoping to have something similar to the onZoomExtents method that fires a callback that would allow me to grab the latest min/max of the visibleRangeProperty of the xAxes to then update the other chart.

Any suggestions on how I could go about doing this?

And if it is not clear what I am talking about I can provide some code snippets.

0 votes


Using the ZoomExtentsModifier on multiple axis used to work in an earlier version of SciCharts, but is broken in 4.3.0. I have two y-axes set up, left and right on my chart, with the right-hand-side just mirroring the left. When I double-tap to zoom to the x/y range of the graph, only the x range is modified. If I disable the change listener that mirrors the range change on the primary y axis, double tap works as expected, but my right hand side y-axis no longer mirrors the primary axis range. This is how I’ve set up the dual axes:

        let yAxis = SCINumericAxis()
        yAxis.axisTitle = "Acceleration (g)"
        yAxis.axisAlignment = .left
        yAxis.visibleRangeLimitMode = .minMax
        chart?.yAxes.add( yAxis )

        // Add an additional visible yAxis to the right without label
        let yAxisRight = SCINumericAxis()
        yAxisRight.axisAlignment = .right
        yAxisRight.axisId = "yAxisRight"
        chart?.yAxes.add( yAxisRight )

        // Sync values with left (primary) axis
        yAxis.visibleRangeChangeListener = { (axis, oldRange, newRange, isAnimating) in
            yAxisRight.visibleRange = newRange

Commenting out the listener at the bottom fixes the ZoomExtentsModifier problem, but is obviously not a workable solution. Any help would be appreciated. Thanks

0 votes

Is it possible to define custom extents such that when I call ChartSurface.ZoomExtents() it will zoom out to where I want instead of the default found by the chart?

I have a requirement that dictates the amount of padding around each axis. I use a custom ViewPortManager and override the OnCalculateNewYRange() and OnCalculateNewXRange() functions to set the range.

I use the ZoomState to decide whether to allow zoom to do its job versus my dictation of the range when the zoom has been to extents. This unfortunately shows an awkward bump between the 3 states.

  1. Zoomed
  2. Zoomed to extents
  3. Zoomed to my custom range

Between 2 and 3 there is a “bump” as the chart resizes. Imagine the user double clicks to ZoomExtents and the animation from zoomed goes out to extents and then suddenly does the same from extents to my custom range. It’s really awkward and I don’t want to lose the animation as it’s a very nice user experience instead of an abrupt switch from zoomed to extents.

So, it would be great to set the extents in my derived ViewPortManager such that a ZoomExtents zooms directly to my custom extents instead of the default.

1 vote

i have a chart with Xaxis as datetimeaxis and several Yaxes, when ZoomExtentsModifier is used, some YAxes disappear This problem can be solved with HighPrecisionNumericAxis, but the performance suffers
Version: v6.1.0 Build: 13075

  • Son Vu asked 4 years ago
  • last active 4 years ago
0 votes


It’s very strange, but chart can not be zoomed with pinch, only by double tap fitting full screen.
And when trying to zoom app freezes and CPU load became 100%.

func installChart() {
    sciChartSurface = SCIChartSurface(frame: self.view.bounds)
    sciChartSurface?.translatesAutoresizingMaskIntoConstraints = false

    self.vGraphBox.subviews.forEach({ $0.removeFromSuperview() })


        sciChartSurface!.leftAnchor.constraint(equalTo: self.vGraphBox.leftAnchor),
        sciChartSurface!.rightAnchor.constraint(equalTo: self.vGraphBox.rightAnchor),
        sciChartSurface!.bottomAnchor.constraint(equalTo: self.vGraphBox.bottomAnchor),
        sciChartSurface!.topAnchor.constraint(equalTo: self.vGraphBox.topAnchor)

    // Add the SCIChartSurface as a subview

    let xAxis = SCILogarithmicNumericAxis()
    xAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
    xAxis.scientificNotation = .logarithmicBase
    //xAxis.textFormatting = "#.#E+0"
    xAxis.logarithmicBase = 10.0
    xAxis.visibleRange = SCIDoubleRange(min: SCIGeneric(100), max: SCIGeneric(22000.0))

    let yAxis = SCINumericAxis()
    yAxis.autoRange = .never
    yAxis.visibleRange = SCIDoubleRange(min: SCIGeneric(-300.0), max: SCIGeneric(0.0))

    lineRenderableSeries.dataSeries = self.dataSeries
    lineRenderableSeries.strokeStyle = SCISolidPenStyle(colorCode: 0xFFE13219, withThickness: 1)

    //self.sciChartSurface?.chartModifiers.add(pinchZoomModifier) //Causes freeze

    SCIUpdateSuspender.usingWithSuspendable(sciChartSurface!) {
0 votes

I have to show multiple charts in the UI. so, I’m using a ListView and adding SciChart in the DataTemplate.
Please refer the files for more details

After the data is loaded, there is a lot of lag in zoom in, zoom out and Rubberband functionality.

Note: I’ve to load more than 4000 XY values in the series.

Could you please take a look at the same and provide some tips for improving the performance and also let me know if there is any alternative for what I’m doing?


0 votes

I’m pretty sure the modifier ZoomExtents fits the entire graph to the screen. But a lot of my interesting data happens right at the far right edge of my graph. So I want to add a buffer.

I’d like to zoom to XMin – XMax0.05 and XMax +XMax0.05.

I do this when loading my graph, and I’d like the double tap of my graph to also zoom to that range.

Any ideas?

0 votes


Are there any events on the chart which fires on zoom starts and zoom ends which i can use to calculate the time taken for the zoom operation.


Pruthvi Sagar

0 votes

Hi I am using scichartsurface with multiple y axes and a single x axis. I would want the zooming to work in a block basis as shown in the attachments.
For ex: In the first attachment I am selecting the block from 08:00:00(xaxis) and 0.76(y axis), and moving on upto 09:30:00(approx) and -22(approx). So when i start zooming the area, is it possible that it selects the entire block(A block would be distance from one major grid line to the next immediate major grid line across X axis). Please refer to 2nd attachment if unclear.

Does SciChart provide any such feature?

  • Kedar k asked 9 years ago
  • last active 9 years ago
0 votes

i have a problem with zoom : i can’t declare my function for charting inside the constructor of my class no also in the function loaded for the simple reason because i must pass two list for this function “public void CreateDataSetAndSeries(List lstX, List lstY)”, so, i create my function like this in my .XAM.cs class :

public void CreateDataSetAndSeries(List lstX, List lstY)
series0 = new XyDataSeries<DateTime, double>();

        using (this.sciChartSurface.SuspendUpdates())

               series0.Append(lstX, lstY);

        lineSeries.DataSeries = series0;

and for my class.xaml i write this :


                <SciChart:ZoomPanModifier ExecuteOn="MouseRightButton"/>
                    <SciChart:ZoomExtentsModifier ExecuteOn="MouseDoubleClick"/>

                <SciChart:CursorModifier ReceiveHandledEvents="True" ShowAxisLabels="True"  ShowTooltip="True" ShowTooltipOn="MouseRightButtonDown"/>

the problem i can’t did the zoom So what i can do ?
waiting for your response thank you !

  • sahar Les asked 10 years ago
  • last active 10 years ago
0 votes

We were recently asked on priority support tickets ‘How do I ZoomExtents a SciChartSurface to a specific range, e.g. VisibleRangeLimit, when double clicking on the chart’.

For the benefit of our user-base our solution is below.

1 vote
0 answers

What’s happening when i am double click on the chart surface?How Zoom extents modifier calculate the visible range?.I need to know in order to use the same calculation in my code.

  • Raghupathy asked 10 years ago
  • last active 10 years ago
2 votes

I have a SciChartSurfacewith one xaxis an four yaxis and a dynamic number of series which are added at runtime.
Also I have some modifiers especially the ZoomExtentsModifier( ExecuteOn=”MouseDoubleClick” XyDirection=”XDirection”) and for each yaxis a yaxisdragmodifier.
Is it possible to double click on a single yaxis and ZoomExtends only this yaxis?

Regards Markus

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