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Update TVServices.md

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HomeSpan 2021-10-31 16:15:10 -05:00 committed by GitHub
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@ -56,7 +56,9 @@ All of this is accomplished by using a combination of some, or all, of the follo
* `Characteristic::CurrentVisibilityState()` and `Characteristic::TargetVisibilityState()` - these two Characteristics work in tandem much like any current-state/target-state pair. When these are defined for an Input Source, a checkbox toggle appears next to the name of the Input Source on the Settings page, provided `Characteristic::IsConfigured()` has also been defined. Clicking the checkbox causes the Home App to toggle the TargetVisibilityState between 0 to 1, where 0 ironically means the checkbox is *checked*, and 1 means it is *unchecked* (the reverse of what you might expect!). If you read this update in HomeSpan you can then use `setVal()` to change the CurrentVisibiltyState() to match the TargetVisibilityState(). Setting CurrentVisibilityState() to 0 means the Input Source appears as a choice in the Input Source Selector. Setting CurrentVisibilityState() to 1 means it does not appear as a selection. Note these features only operate if an ID has been set for the Input Source with `Characteristic::Identifier()`, and IsConfigured() has been defined and set to 1.
### Examples
Please see [*File → Examples → HomeSpan → Other Examples → Television*](../Other%20Examples/Television) for a complete worked example demonstrating the effects of using different combinations of the above Characteristics