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ChartControl.ConstantLineMoved Event

Occurs when a user moves a constant line.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v20.1.UI.dll

Declaration

public event ConstantLineMovedEventHandler ConstantLineMoved
Public Event ConstantLineMoved As ConstantLineMovedEventHandler

Event Data

The ConstantLineMoved event's handler receives an argument of the ConstantLineMovedEventArgs type. The following properties provide information specific to this event:

Property Description
ConstantLine Returns a constant line that is being moved.
OldValue Returns the previous axis value.

Remarks

Users can move constant lines if their RuntimeMoving option is enabled.

Example

The following example adds a horizontal constant line with an editable title. Once a user moves a constant line, the title is updated to display the current constant line value.

private void OnFormLoad(object sender, EventArgs e) {

    ConstantLine constantLine = new ConstantLine();
    constantLine.AxisValue = 65.0;
    constantLine.Title.Text = "Title";    
    constantLine.RuntimeTitleEditing = true;
    constantLine.RuntimeMoving = true;

    XYDiagram diagram = chartControl1.Diagram as XYDiagram;
    diagram.AxisY.ConstantLines.Add(constantLine);

    chartControl1.ConstantLineMoved += OnChartControlConstantLineMoved;
}

private void OnChartControlConstantLineMoved(object sender, ConstantLineMovedEventArgs e) {
    e.ConstantLine.Title.Text = String.Format("{0:f3}",e.ConstantLine.AxisValue);
}
See Also