Warn user if no future alert is possible when POI Alert is started
Recently I wanted to set a POI alert for an upcoming walking track intersection but it had been quite a long time since I last used the facility. The alert never occurred because I didn't properly configure all the interrelated settings, of which there are quite a few. I hadn't enabled the folder containing my new point (or maybe the name had changed?).
My suggestion is to warn the user with a brief helpful message (maybe similar to changing presets) when the START button is tapped if no future alert is possible because of any of the conditions:
- no folders are checked
- or no points are defined in the checked folder(s)
- or the Notify checkbox is unchecked
- or all possible points are a long distance from GPS position, say 100km
Note all conditions above must be valid otherwise the alert will never occur.
I acknowledge the user may create a point in the appropriate folder after starting the alert system, but this seems a less common case, and the brief message is still of benefit.