Screen updates only on a key event or touch but not every second or even every minute. How can I change the update frequency?

Thanks to your support I managed to Beta Launch my first app today! Thanks for all the helps so far. But upon using it on my actual garmin device I noticed that the screen only updates when I tap it (activating functions that explicitly call WatchUi.requestUpdate();) It actually didn't do this in the simulator either, but I thought it would solve itself on the device.

Elsewhere on the discussions boards I read it should update every second, at the very least every minute. But it does neither. Could it be that I have accidently overwritten the basic screen update settings?

Any suggestions on how to get it to refresh the view every second (at minimum)? Thanks in advance

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My code looks like this, it is pretty basic I guess.

- onLayout calls on the basic background layout which I set to white

- onShow and onHide are empty

- onUpdate holds a reference to other functions that draw the view

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import Toybox.Graphics;

import Toybox.Lang;

import Toybox.System;

import Toybox.WatchUi;

import Toybox.ActivityMonitor;

import Toybox.Activity;

using Toybox.UserProfile;

class MatchView extends WatchUi.View {

private var UI = getApp().getUIHelpers();

var matchStarted = true; //True is me; false is opponent

var matchWinner = false; //False is not finished; other PLAYER_1/PLAYER_2

var firstService = true;

var fore_backhand = null;

var net = false;

function initialize() {

View.initialize();

}

// Load your resources here

function onLayout(dc as Dc) as Void {

setLayout(Rez.Layouts.MainLayout(dc));

}

// Called when this View is brought to the foreground. Restore

// the state of this View and prepare it to be shown. This includes

// loading resources into memory.

function onShow() as Void {

}

// Update the view

function onUpdate(dc as Dc) as Void {

// Call the parent onUpdate function to redraw the layout

View.onUpdate(dc);

if (matchWinner != false) {

finalView(dc);

}

else {

drawGameScore(dc);

drawHeartRate(dc);

if (getApp().getStatistics().statisticsMode != 0) {

drawService(dc);

}

if (fore_backhand != null){

drawForeBackhand(dc);

}

if (net == true){

drawNet(dc);

}

updateTime(dc);

}

// Called when this View is removed from the screen. Save the

// state of this View here. This includes freeing resources from memory

function onHide() as Void {

}

Top Replies

jim_m_58 over 2 years ago +1

Onely watch faces and data fields have onUpdate() called automaticly. For device apps and widgets, you usually want to start a timer and have it call WatchUp.requestUpdate() on a regular basis.

All Replies

jim_m_58 over 2 years ago

Onely watch faces and data fields have onUpdate() called automaticly. For device apps and widgets, you usually want to start a timer and have it call WatchUp.requestUpdate() on a regular basis.

Nathaniel over 2 years ago in reply to jim_m_58

Interesting! That explains why it didn't happen so far. Would you have an example of some code that accomplishes this?

I'm having trouble envisioning how this would work. Would I start a function that includes a timer when I start the activity? Let it run down 500 ms and then call itself again?

jim_m_58 over 2 years ago in reply to Nathaniel

In your view's initialize(), create and start a timer for 1 second for example

		var timer= new Timer.Timer();
		timer.start( method(:onTimer), 1000, true );

And the onTimer callback is nothing more than

function onTimer() {WatchUi.requestUpdate();}

Nathaniel over 2 years ago in reply to jim_m_58

It seems deceptively simple, but I cannot seem to get around this error being thrown

Invalid '$.Toybox.Lang.Method() as Any' passed as parameter 1 of type '$.Toybox.Lang.Method() as Void'.

I've implemented it like this now...

------------------

function initialize() {

View.initialize();

var timer = new Timer.Timer();

timer.start(method(:timerCallBack), 500, true);

}

function timerCallBack() {

WatchUi.requestUpdate();

}

jim_m_58 over 2 years ago in reply to Nathaniel

See the Timer sample in the SDK for an example of what to add for type checking.

Nathaniel over 2 years ago in reply to jim_m_58

As always it takes a night of sleep! The function timerCallBack needed to be specified as Void. I didn't look in the example but in the API documentation this is not mentioned either.

Thanks again though! It is much appreciated