Add observer to SmartCab

[drakenya]

Add an observer to the SmartCab, for this sequence:

1. Observer attached to SmartCab, with access to the CommandQueue
2. user changes SmartCab control on Form
3. Form updates SmartCab
4. SmartCab marks itself as "dirty" as a value has changed
5. SmartCab triggers the observer, indicating it's been changed

See:

• https://docs.microsoft.com/en-us/dotnet/standard/events/observer-design-pattern

[drakenya]

See also:

• https://docs.microsoft.com/en-us/dotnet/api/system.collections.concurrent.concurrentqueue-1?view=netframework-4.7.1

For the main command queue.

[drakenya]

This may not work on the AcelaConnector, due to multiple/many-to-many connections something could get lost. Look into switching to a base Rx.

See:

• https://softwareengineering.stackexchange.com/questions/246684/was-nets-iobservert-intended-for-subscribing-to-multiple-iobservables
• http://www.introtorx.com/content/v1.0.10621.0/02_KeyTypes.html
• http://reactivex.io/

[drakenya]

this.trkCab1Inertia.DataBindings.Add("Value", xx, "Inertia", false, DataSourceUpdateMode.OnPropertyChanged);
this.trackBar1.DataBindings.Add("Value", xx, "Inertia", true, DataSourceUpdateMode.OnPropertyChanged);

https://stackoverflow.com/questions/1453958/databinding-to-a-custom-class-in-c-sharp