How to: Place One Circular Scale into Another
In some cases you may need to place several circular scales within the main scale. The following example demonstrates how to create a typical watch with several scales (the main scale will show the current time, while the minor scales will show the current day, week and month).
To place several scales inside the main scale, it's necessary to create the appropriate ItemsPanelTemplate object and assign it to the AnalogGaugeControl.ScalePanelTemplate property. This template defines a Grid panel with 2 rows and 4 columns.
After that, the ColumnSpan and RowSpan attached properties are set to 2 and 4 for the main scale, so that it occupies the entire grid area. For other circular scales, Column and Row properties define their positions inside the grid area (and therefore inside the main scale).