@gapertonthanks for your replies:
I have added sensorReadings.js in app:
export class sensorClass {
myVar=0;
myTimer=0;
start() {
this.myTimer=setInterval(this.increment(),1000);
console.log("Start");
}
increment() {
this.myVar++;
console.log(this.myVar);
}
stop() {
clearInterval(this.myTimer);
console.log("Stop");
}
}and have the following in index.js
import document from "document";
import { Application } from './view'
import { Screen1 } from './screen1'
import { Screen2 } from './screen2'
import { sensorClass } from './sensorReader'
class MultiScreenApp extends Application {
screen1 = new Screen1();
screen2 = new Screen2();
mySensorReadings = new sensorClass();
// Called once on application's start...
onMount(){
// Set initial screen.
// Same as Application.switchTo( 'screen1' ), which might be used to switch screen from anywhere.
this.screen = this.screen2;
this.mySensorReadings.start();
document.onkeypress = this.onKeyPress;
}
onUnmount() {
this.mySensorReadings.stop();
}
// Event handler, must be pinned down to the class to preserve `this`.
onKeyPress = ({ key }) => {
if( key === 'down' ){
// Just switch between two screens we have.
Application.switchTo( this.screen === this.screen1 ? 'screen2' : 'screen1' );
}
}
}
// Create and start the application.
MultiScreenApp.start();As I am intending to log data on a periodic basis, I am assuming the best place to do this is from the main application, so that portions from the same base of data can be used across different screens.
So build the class that will "kick off" the sensor event subscriptions, and record the data within the class. Run a secondary timer to bring together the readings from the various sensors, make calculations (distance from GPS, average HR & cadence i.e. all data processing) and log to a file for later analysis (once messaging is reliable). Sensor events can be unsubscribed in unmount if not already stopped.
In the above code, I do indeed get the console log that the start function has fired. And that is it. No periodic messages. No message prior onunmount. What have I done wrong (or broken)?
Is my thought process broken??
Best Answer