Barometer.java

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// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2019 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0
 
 
package com.google.appinventor.components.runtime;
 
import com.google.appinventor.components.annotations.DesignerComponent;
import com.google.appinventor.components.annotations.SimpleEvent;
import com.google.appinventor.components.annotations.SimpleObject;
import com.google.appinventor.components.annotations.SimpleProperty;
import com.google.appinventor.components.common.ComponentCategory;
import com.google.appinventor.components.common.YaVersion;
 
import android.hardware.Sensor;
 
@DesignerComponent(version = YaVersion.BAROMETER_COMPONENT_VERSION,
    description = "A sensor component that can measure the ambient air pressure.",
    category = ComponentCategory.SENSORS,
    nonVisible = true,
    iconName = "images/barometer.png")
@SimpleObject
public class Barometer extends SingleValueSensor {
  public Barometer(ComponentContainer container) {
    super(container.$form(), Sensor.TYPE_PRESSURE);
  }
 
  @Override
  protected void onValueChanged(float value) {
    AirPressureChanged(value);
  }
  
  @SimpleEvent
  public void AirPressureChanged(float pressure) {
    EventDispatcher.dispatchEvent(this, "AirPressureChanged", pressure);
  }
 
  @SimpleProperty(description = "The air pressure in hPa (millibar), if the sensor is available " +
      "and enabled.")
   public float AirPressure() {
      return getValue();
  }
}