Persisting graph display through onShow

Hi everyone,

I developed a water level graph (for tides) using drawRectangle(). It's made of 28 rectangles, covering 24 hours.

I would like to persist the display of this graph, however when I copy paste the related code from onUpdate() to onShow(), I get a out of memory error.

The code is pretty thick as I have several nested IFs per rectangle.

Am I supposed to copy the whole code?

Thanks,

Nico

Nico85 over 4 years ago in reply to jim_m_58

At the moment, here is the behavior of my app :

1) I chose tu use it as watchFace from the watch menu

2) The data are retreived from webrequest every 15mn (I have to wait). In the meantime, no data is displayed except date and time.

3) If I quit the watch Face to display another menu, and come back to it, if webrequest data were loaded, they are not shown anymore (only date and time).

Webrequest data are not persisted. To allow this, at the moment I ask for displaying Webrequest data in onShow but it may not be the right way.

I would like to :

-Initiate a webrequest everytime the user choses to use this watchface

-Persist the webrequest data display, to allow the user to still see the data after leaving the watchface and coming back to it.

jim_m_58 over 4 years ago in reply to Nico85

With a background service you can run at most every 5 minutes, there is no way to have it run if you leave the WF and return right awa.

Persisting the data means saving it to storage when onBackgrounData occurs, and reading it from storage when the WF starts.

jim_m_58 over 4 years ago in reply to jim_m_58

Have you looked at this?

https://developer.garmin.com/connect-iq/core-topics/persisting-data/#persistingdata

Nico85 over 4 years ago in reply to jim_m_58

...and that's why Application.Storage.getValue() should be called in onshow right?

jim_m_58 over 4 years ago in reply to Nico85

I call it in initialize for the view in most cases.