Class CandlestickDeltaService

Whether the virtual delta layer is the active navigation target.

The remembered reference line id, or null when none has been chosen.

Injects the observer wiring used for runtime-created traces. The Controller owns the services that must observe a trace (audio, braille, text, review, highlight), so it supplies this hook after construction.

Lists the reference series available for comparison in the current subplot, or null when the feature does not apply here (the active trace is not a candlestick, or no line layer exists alongside it).

Moves keyboard focus into the reference picker dialog scope.

Closes the reference picker dialog scope, returning to the previous scope.

Remembers a reference line as the active comparison target. Persists across on/off toggles until the user picks a different one.

Builds and activates the virtual delta layer for the remembered (or given) reference line, comparing every OHLC field. Replaces an already-active delta layer in place when the user reconfigures via the reference picker.

Deactivates the virtual delta layer and restores the real chart layer. The remembered reference is kept so a later Alt+L can re-enable it.

Deactivates without announcements if the delta layer is active. Used by layer-switching commands so PageUp/PageDown from a nested mode cannot strand the virtual trace on the navigation stack.

Discards the virtual layer's internal state and resets the rotor WITHOUT touching the plot context stack or display focus. Used by callers that manage the navigation stack and keyboard scope themselves while tearing the delta layer down — e.g. the braille-Escape command on a multi-panel figure, which pops the delta trace via exitSubplot() and re-focuses the plot on its own. Using deactivate there would double-manage the stack and fire a competing focus change.