Measurements.BeforeMeasurement Event
Occurs when a user starts ruler creation.
Namespace: DevExpress.XtraMap
Assembly: DevExpress.XtraMap.v24.2.dll
Declaration
Event Data
The BeforeMeasurement event's data class is BeforeMeasurementEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
Cancel | Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs. |
RulerType | Returns the type of the new ruler. |
StartPoint | Returns coordinates of the ruler’s start point. |
Style | Returns style settings of the new ruler. |
Remarks
The Measurements object raises the BeforeMeasurement event after a user sets the ruler’s first point. Use the e.Cancel property to cancel ruler creation. The e.StartPoint property returns the ruler’s first point. To determine the type of ruler that a user wishes to add, use the e.RulerType property.
The example below cancels ruler creation if a ruler starts inside an ellipse:
private void Measurements_BeforeMeasurement(object sender, BeforeMeasurementEventArgs e) {
MapHitInfo info = this.mapControl1.CalcHitInfo(e.StartPonit);
if (info.InMapEllipse) {
e.Cancel = true;
}
}
See Also