Controlling Transformation

The transformations applied to the chart can be tuned by using Transform event of C1Chart. When scaling, rotating or zooming occurs, the Transform event fires. Adding a handler to this event allows adjusting limits of axes or to cancel the action.

The following example limits the range of x-axis from -10 to 10 by canceling action when axis minimum or maximum is beyond the range.

· Visual Basic

Private Sub C1Chart1_Transform(ByVal sender As Object, _
ByVal e As C1.Win.C1Chart.TransformEventArgs) Handles C1Chart1.Transform

If e.MinX < -10 Or e.MaxX > 10 Then

e.Cancel = True

End If

End Sub

· C#

private void c1Chart1_Transform(object sender,C1.Win.C1Chart.TransformEventArgs e)

{

if( e.MinX < -10 || e.MaxX > 10)

e.Cancel = true;

}

· Delphi

procedure Class1.c1Chart1_Transform(sender: System.Object;

e: C1.Win.C1Chart.TransformEventArgs);

begin

if ((e.MinX < -10) or (e.MaxX > 10)) then

e.Cancel := True;

end;