Zooming in C1Chart | ComponentOne Chart for WPF and Silverlight

Zooming in C1Chart

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To add zooming behavior in C1Chart, use some custom code in the Chart's MouseWheel event.

C#	Copy Code
private void chart_MouseWheel(object sender, MouseWheelEventArgs e) { if (Keyboard.Modifiers == ModifierKeys.Control && e.Delta == -120) { chart.View.AxisX.Scale += .1; chart.View.AxisY.Scale += .1; } else if (Keyboard.Modifiers == ModifierKeys.Control && e.Delta == 120) { chart.View.AxisX.Scale -= .1; chart.View.AxisY.Scale -= .1; } }

Copy Code

private void chart_MouseWheel(object sender, MouseWheelEventArgs e)
{    
      if (Keyboard.Modifiers == ModifierKeys.Control && e.Delta == -120)    
      {
       chart.View.AxisX.Scale += .1;
       chart.View.AxisY.Scale += .1; 
       }
else if (Keyboard.Modifiers == ModifierKeys.Control && e.Delta == 120)
      {
          chart.View.AxisX.Scale -= .1;
          chart.View.AxisY.Scale -= .1;    
          }
}

To enable the user to move the chart around when it’s zoomed, add the following to C1Chart’s XAML markup:

XAML	Copy Code
<c1c:C1Chart x:Name="chart" MouseWheel="chart_MouseWheel" > <c1c:C1Chart.Actions> <c1c:TranslateAction MouseButton="Left" /> </c1c:C1Chart.Actions> </c1c:C1Chart>