When you change these properties dynamically then you can use the InvalidateArrange method of the scale for recalculation of the marker's location.
The sample code is below.
sender, RoutedEventArgs e)
.marker.RelativeWidth = 0.3;
Also I should note that in the 2011.Q3 release we introduced a new gauge control. It is almost a new control redesigned from scratch. Some of its features are similar to the old control’s features but they are implemented in absolutely different way (using different set of properties), some features are completely new.
Our demo application now references the new gauge control and demonstrates its features.
We strongly recommend using of the new gauge control in the new applications. We also would recommend replacing the old control with new one in existing applications if there is a timeframe for this task.
the Telerik team
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