Use Case: Map Timeline Range Selection

Summary

  • Scope: Map View
  • Level: User Goal
  • Actors: App User
  • Brief: The user can view the map over a range of consecutive points in time by using the timeline feature.
  • Assignee: Andrei

Scenarios

  • Precondition: The user has opened the app and selected a map.
  • Main success scenario:
    • The user selects the timeline view and uses the scroll bar with a day/month/year granularity, or a date input that allows date range selection.
    • Using the scroll bar, the user clicks and drags the mouse to span a range of dates.
    • The user can only drag the selection up to the furthest event that happened in the past or the future.
    • Dragging over the scroll bar hints which day/month/year represents the start and which the end of the selected date range.
    • Finalizing the date selection updates the map to show the state of the garden over a range of points in time.
    • Elements on the map that do not exist over the whole range of dates, appear grey.
    • Elements on the map can be edited/moved/deleted, but not be added or removed.
  • Alternative scenario:
  • Error scenario:
    • There is an error in the timeline display or navigation functionality. In this case, the app displays an error message and allows the user to try again.
    • The user tries to add/remove elements while being in the active date range. In this case, the app displays an error message that adding/removing elements is not allowed.
  • Postcondition: The user successfully sees the map containing the elements in the desired range of dates.
  • Non-functional Constraints:
    • Offline availability only within the current year
    • Memory usage (other years get unloaded after some time if they are not used)
    • Performance