Zooming and Panning in WinUI Chart (SfCartesianChart)

13 Jun 20245 minutes to read

SfCartesianChart allows you to zoom the chart area with the help of the zoom feature. This behavior is mostly used to view the data point in the specific area, when there are large number of data points inside the chart.

Zooming and panning provides you to take a close-up look of the data point plotted in the series

Enable Zooming

To enable the zooming and panning in the chart, create an instance of ChartZoomPanBehavior and set it to the ZoomPanBehavior property of SfCartesianChart.

<chart:SfCartesianChart>
    ...
    <chart:SfCartesianChart.ZoomPanBehavior>
        <chart:ChartZoomPanBehavior />
    </chart:SfCartesianChart.ZoomPanBehavior>
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
...
ChartZoomPanBehavior zooming = new ChartZoomPanBehavior();
chart.ZoomPanBehavior = zooming;
...

Zooming the Chart Area

Zooming the chart area can be achieved in different ways by pinch zooming, mouse wheel zooming, selection zooming, and also using the properties ZoomFactor and ZoomPosition.

Pinch Zooming

Pinch zooming is enable by using the EnablePinchZooming property to true as shown in the below code snippet.

<chart:SfCartesianChart>
    <chart:SfCartesianChart.ZoomPanBehavior>
        <chart:ChartZoomPanBehavior EnablePinchZooming="True"/>
    </chart:SfCartesianChart.ZoomPanBehavior>
    ...
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
...
ChartZoomPanBehavior zooming = new ChartZoomPanBehavior()
{
    EnablePinchZooming = true
};

chart.ZoomPanBehavior = zooming;
...

Mouse Wheel Zooming

Zooming can be performed by mouse wheel action by setting EnableMouseWheelZooming property to true.

<chart:SfCartesianChart>
    <chart:SfCartesianChart.ZoomPanBehavior>
        <chart:ChartZoomPanBehavior EnableMouseWheelZooming="True"/>
    </chart:SfCartesianChart.ZoomPanBehavior>
    ...
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
...
ChartZoomPanBehavior zooming = new ChartZoomPanBehavior()
{
    EnableMouseWheelZooming = true
};

chart.ZoomPanBehavior = zooming;
...

Zooming by setting ZoomFactor and ZoomPosition

ZoomFactor defines the percentage of visible range from the total range of axis values. ZoomPosition defines the position for ranges of values that need to be displayed as a result of ZoomFactor.

<chart:SfCartesianChart>
    <chart:SfCartesianChart.XAxes>
        <chart:CategoryAxis ShowMajorGridLines="False" ZoomFactor="0.3" ZoomPosition="0.5"/>
    </chart:SfCartesianChart.XAxes>
    ...
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
CategoryAxis primaryAxis = new CategoryAxis()
{
    ShowMajorGridLines = false,
    ZoomFactor = 0.3,
    ZoomPosition = 0.5
};
chart.XAxes.Add(primaryAxis);
...

Zooming support in WinUI Chart

Zooming Mode

The zooming can be done both horizontally and vertically. The zooming direction is defined by using the ZoomMode property.

Following code example illustrates how to restrict the chart to be zoomed only along horizontal axis.

<chart:SfCartesianChart>
    <chart:SfCartesianChart.ZoomPanBehavior>
        <chart:ChartZoomPanBehavior ZoomMode="X" />
    </chart:SfCartesianChart.ZoomPanBehavior>
    ...
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
...
ChartZoomPanBehavior zooming = new ChartZoomPanBehavior()
{
    ZoomMode = ZoomMode.X
};

chart.ZoomPanBehavior = zooming;
...

Zoom mode support in WinUI Chart

Following code example illustrates how to restrict the chart to be zoomed only along vertical axis.

<chart:SfCartesianChart>
    <chart:SfCartesianChart.ZoomPanBehavior>
        <chart:ChartZoomPanBehavior ZoomMode="Y" />
    </chart:SfCartesianChart.ZoomPanBehavior>
    ...
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
ChartZoomPanBehavior zooming = new ChartZoomPanBehavior()
{
    ZoomMode = ZoomMode.Y
};

chart.ZoomPanBehavior = zooming;
...

Zoom mode support in WinUI Chart

Enable Panning

Panning feature allows moving the visible area of the chart when it is zoomed in. To enable panning, you have to set the EnablePanning property to true.

<chart:SfCartesianChart>
    <chart:SfCartesianChart.ZoomPanBehavior>
        <chart:ChartZoomPanBehavior EnableMouseWheelZooming="True" EnablePanning="True"/>
    </chart:SfCartesianChart.ZoomPanBehavior>
    ...
</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
ChartZoomPanBehavior zooming = new ChartZoomPanBehavior()
{
    EnableMouseWheelZooming = true,
    EnablePanning = true
};

chart.ZoomPanBehavior = zooming;
...