demo/accelerometer_stream/resources/src/js/index_ui.js - v4.1 - Gecko OS API Documentation Silicon Labs

var stream = AccelerometerStream()
stream.temperatureUpdateInterval = 3000
var _el = function(id) {
   return document.getElementById(id)
}
/** -----------------------------
 * This is called when the stream connects
 */
stream.onConnected = function() {
   _el('btn-connect').value = 'Disconnect'
   _el('txt-host').disabled = true
   _el('txt-interval').disabled = true
   _el('txt-message').disabled = false
   _el('txt-temp').disabled = false
   _el('txt-humid').disabled = false
   
   stream.getUpdateInterval()
}
/** -----------------------------
 * This is called when the stream disconnects
 */
stream.onDisconnected = function() {
   _el('btn-connect').value = 'Connect'
   _el('txt-host').disabled = false
   _el('txt-interval').disabled = true
   _el('txt-interval').value = ''
   _el('txt-message').disabled = true
   _el('txt-temp').disabled = true
   _el('txt-temp').value = ''
   _el('txt-humid').disabled = true
   _el('txt-humid').value = ''
}
/** -----------------------------
 * This is called when a new temperature reading is available
 */
stream.onTemperatureAvailable = function(data) {
   _el('txt-temp').value = data.temperature.toFixed(1)
   _el('txt-humid').value = data.humidity.toFixed(1)
}
/** -----------------------------
 * This is called when a the device's update interval changes
 */
stream.onIntervalUpdated = function(value) {
   _el('txt-interval').value = value
   _el('txt-interval').disabled = false
}
/** -----------------------------
 * This is called when the connect button is pressed
 */
function onConnect(isKeyEvent) {
   if(isKeyEvent && !(event.key === 'Enter' || event.keyCode == 13 || event.keyCode == 10)) {
      return
   }
   
   var btn = _el('btn-connect')
   var txt = _el('txt-host')
   
   if(!stream.isConnected() && btn.value !== 'Connecting ...') {
      if(!txt.value) {
         alert('Must provide device IP address or hostname')
         return
      }
      
      txt.disabled = true
      btn.value = 'Connecting ...'
      stream.start(txt.value, _el('graph'))
      
   } else {
      txt.disabled = false
      stream.stop()
   }
}
/** -----------------------------
 * This is called when the interval text input changes
 */
function onInterval() {
   if(!(event.key === 'Enter' || event.keyCode == 13 || event.keyCode == 10)) {
      return
   }
   
   var txt = _el('txt-interval')
   
   if(!txt.value) {
      alert('Must provide valid interval value')
      return
   }
   
   function resultHandler(result, data) {
      if(!result) {
         alert('Failed to set update interval, err: ' + data)
      }
      txt.disabled = false
   }
   
   txt.disabled = true
   stream.setUpdateInterval(txt.value, resultHandler)
   
}
/** -----------------------------
 * This is called when the message text input changes
 */
function onMessage() {
   if(!(event.key === 'Enter' || event.keyCode == 13 || event.keyCode == 10)) {
      return
   }
   
   var txt = _el('txt-message')
   
   if(!txt.value) {
      return
   }
   
   function resultHandler(result, data) {
      if(!result) {
         alert('Failed to send message, err: ' + data)
      }
      txt.value = ""
      txt.disabled = false
   }
   
   txt.disabled = true
   stream.sendMessage(txt.value, resultHandler)
}
var host = window.location.host
if(host) {
   _el('txt-host').value = host
}
console.log('Ready.')