Use Case: Map Timeline Single Selection

Summary

• Scope: Map View
• Level: User Goal
• Actors: App User
• Brief: The user can view the map at different points in time by using the timeline feature.
• Assignee: Daniel Steinkogler

Scenarios

• Precondition:
  • The user has opened the app and selected a map.
  • The timeline shows the current date.
• Main success scenario:
  • A timeline is presented to the user which allows them to select year, month and day.
  • Year, month and day can be individually selected by scrolling, moving sliders or clicking on the elements.
  • This allows navigation to a different point in the past, present and future.
  • The map updates to show the state of the garden at the selected point in time (removing or adding elements accordingly).
  • Adding or removing elements is done on the selected date.
  • The selected date is highlighted.
  • The sliders are synchronized, i.e., if the user scrolls the day slider over the last day of the month, the month slider is updated to the next month.
• Alternative scenario:
  • The user corrects the dates in the attributes of elements or presses undo to undo changes in the dates.
• Error scenario:
• Postcondition: The user has successfully changed to the desired date.
• Non-functional Constraints:
  • Performance: data in up to 100 years should be fast to use
• Note:
  • Single Date Selection must always be an exact date so we have a well-known date (reference point) when elements got added to the map.

Development Progress

• Changing the map's date is currently implemented with a simple date picker in Timeline.tsx and sub-components.
  The related logic in the MapStore can be found here
• the new version of the timeline should allow user to select date by scrolling or moving sliders