Graph arrow should give feedback when clicked.

[mitra42]

Response of clicking left arrow on graph is slow

Should change e.g. to sandglass - and then back when data loaded

Also need visual indication if no data sets received as Axis doesnt (maybe at least put a number of days beneath)

[mitra42]

Strategy

• UX triggered from MqttGraph.graphnavleft
• This calls MG.addDataFrom
• which fetches file in paralel over each dataset then has a console line ("XXX72 done all")
  -In MG.addDataFrom
  • if couter is 0 - change to animated gif,
  • increment counter
• after the async
  dec counter
  if 0 change to static gif

Note that when new dataset added it uses graphNavLeftFIlenames which calls GD.addDataFrom and I think can ignore this.

[mitra42]

Works - not sure its sufficient to account for lines with no back-history because in most cases its very quick

[mitra42]

Idea .... if the data comes in empty, add a single point with a null

MqttGraph.state.dateFrom is the target first date, can get current date from existing data as done in MqttTopic.addDataFrom

Strategy - pass dateFrom down through chain to MT.addDataFrom OR maybe can get it at MT level

Done .... now expands axis and adds dashes to previous data

[mitra42]

Should also add the reverse - to trim back down
Strategy

• icon like left arrow
• goes to graphnavright
• changes dateFrom in other direction - but not into future.
• loops thru children (Datasets) passing new date
• each child removes all date from before that date