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In many cases, you may wish to visually identify specific ranges of values along scales in analog gauges (circular and linear). For instance, you may want to mark some safe or critical value ranges. This feature can easily be implemented via custom ranges.
Ranges allow you to mark certain value ranges in circular and linear gauges. Visually, they are displayed as bars along scales. These bars can be rectangular in linear gauges or rounded in circular gauges.
In the following image, a circular gauge contains two range bars (green and red), and a linear gauge contains three range bars (green, yellow and red).
To create a range at design time, do the following.
Locate the Gauge control's smart tag and click Customize Gauge Control....
Then, in the Visual Gauge Control Designer, locate the scale's smart tag and click Run Designer.
In the Scales - Element Designer, click the Ranges... button, as shown below.
The Scale Ranges editor allows you to create new, delete or customize existing ranges.
Each range provides properties that allow its visual options to be modified. The main properties are:
- BaseRange.ShapeOffset - the offset of the bar's edge from the scale axis in relative coordinates;
- BaseRange.StartThickness and BaseRange.EndThickness - the thickness of the bar at the starting and ending points;
- BaseRange.AppearanceRange - contains appearance settings for the range.