Create a TrafficLightsSafeArea widget

[matthew-carroll]

This library has TitlebarSafeArea, which pushes content down below the title bar.

I'm displaying tabs in the title bar area and I need the tabs to avoid the traffic lights, but not by pushing the content down. Instead, I need to push the content to the right of the traffic lights, but remain at the top of the screen.

Consider offering a TrafficLightsSafeArea for this purpose. Or, consider adding a property to TitlebarSafeArea that toggles between pushing content down, vs pushing content away from the traffic lights within the title bar.

I filed an equivalent issue in macos_ui before seeing that this package already has a TitlebarSafeArea: macosui/macos_ui#437

I'll let the maintainers hash out where that belongs.

[Adrian-Samoticha]

This may, in fact, be possible by retrieving the frame of the traffic light buttons to get their positions. I’ll look into this on occasion.

[GroovinChip]

@Adrian-Samoticha this may be helpful in resolving macosui/macos_ui#371