public WeightedObjectInfos Calculate(
double weightGrams,
RecognizedObjects recognizedObject)
{
var weightedObjectInfos = new WeightedObjectInfos(
recognizedObject: recognizedObject,
weightKilograms: (double)weightGrams / 1_000.0,
calories: (_caloriesPerGram[recognizedObject] * weightGrams),
pricePerKgEuro: _pricesPerKilo[recognizedObject],
mainImagePath: recognizedObject.MainImagePath());
var barcodeText = Math.Round(weightedObjectInfos.PriceEuro * 10000, 0).ToString().PadLeft(12, '0');
var barcodeGenerator = new Barcode();
var barcodeImage = barcodeGenerator.Encode(
TYPE.UPCA,
barcodeText,
Color.Black,
Color.White,
290,
120);
var barcodeImageDirectory = "picturesBarcode";
Directory.CreateDirectory(barcodeImageDirectory);
var filename = Path.GetFullPath($@"{barcodeImageDirectory}/{Guid.NewGuid().ToString("N")}.jpg");
barcodeImage.Save(filename);
weightedObjectInfos.BarCodePath = filename;
return(weightedObjectInfos);
}
public void GenerateData(
double weight,
RecognizedObjects recognizedObject)
{
RecognizedObject = recognizedObject;
if (recognizedObject == RecognizedObjects.Unrecognized)
{
WeightString = string.Empty;
RecognizedObjectNameString = string.Empty;
PriceString = string.Empty;
PricePerKiloString = string.Empty;
CaloriesString = string.Empty;
FruitImagePath = string.Empty;
BarcodeImagePath = string.Empty;
return;
}
var scaleCalculator = new ScaleCoreCalculator();
var recognizedObjectInfos = scaleCalculator.Calculate(weight, recognizedObject);
WeightString = $"{Math.Round(recognizedObjectInfos.WeightKilograms, 3):0.000}Kg";
RecognizedObjectNameString = recognizedObject.DisplayText();
PriceString = $"{Math.Round(recognizedObjectInfos.PriceEuro, 2)}€";
PricePerKiloString = $"{Math.Round(recognizedObjectInfos.PricePerKgEuro, 3)}€/Kg";
CaloriesString = $"{Math.Round(recognizedObjectInfos.Calories, 0)}cal / {Math.Round(recognizedObjectInfos.Joules, 0)}J";
FruitImagePath = recognizedObjectInfos.MainImagePath;
BarcodeImagePath = recognizedObjectInfos.BarCodePath;
Task.Run(async() => await AddFakeNotifications(recognizedObject));
}
public WeightedObjectInfos(
RecognizedObjects recognizedObject,
double weightKilograms,
double calories,
double pricePerKgEuro,
string mainImagePath)
{
RecognizedObject = recognizedObject;
WeightKilograms = weightKilograms;
Calories = calories;
PricePerKgEuro = pricePerKgEuro;
MainImagePath = mainImagePath;
}
private async Task AddFakeNotifications(RecognizedObjects recognizedObject)
{
await Task.Delay(1500);
Application.Current.Dispatcher.Invoke(
DispatcherPriority.Background,
new Action(() =>
{
var mfi = new System.Globalization.DateTimeFormatInfo();
string strMonthName = mfi.GetMonthName(DateTime.Now.Month).ToString();
switch (recognizedObject)
{
case RecognizedObjects.Apple:
Notifications.Add($"Apples are a seasonal fruit in {strMonthName}!");
Notifications.Add("If you buy 200gr more, you'll get a 20% discount!");
Thread.Sleep(500);
Notifications.Add("Pears are discounted too!");
break;
case RecognizedObjects.Orange:
if (!new[] { 1, 6, 7, 8, 9, 10, 11, 12 }.Any(a => a == DateTime.Now.Month))
{
Notifications.Add($"Oranges are a seasonal fruit in {strMonthName}!");
}
else
{
Notifications.Add(new NiceNotification($"You are buying off-season fruits. Oranges are in season from February to May.", "Khaki"));
}
Notifications.Add("Good choice! In this period Vitamin C is important!");
break;
case RecognizedObjects.Banana:
Notifications.Add($"Bananas are a seasonal fruit in {strMonthName}!");
Notifications.Add("Buongustaio!");
break;
case RecognizedObjects.Strawberry:
if (!new[] { 2, 3, 4, 5 }.Any(a => a == DateTime.Now.Month))
{
Notifications.Add($"Stawberries are a seasonal fruit in {strMonthName}!");
}
else
{
Notifications.Add(new NiceNotification($"You are buying off-season fruits. Strawberries are in season from February to May.", "Khaki"));
}
break;
}
}));
}
public WeightPageViewModel(
double weight,
RecognizedObjects recognizedObject)
{
Notifications = new ObservableCollection <NiceNotification>();
_timer = new DispatcherTimer()
{
Interval = TimeSpan.FromMilliseconds(500)
};
_timer.Tick += _timer_Tick;
_timer.Start();
Date = DateTime.Now.ToString(_dateFormat);
Hour = DateTime.Now.ToString(_hourFormat);
GenerateData(weight, recognizedObject);
}
public static string DisplayText(this RecognizedObjects recognizedObject)
{
switch (recognizedObject)
{
case RecognizedObjects.Apple:
return("Apples");
case RecognizedObjects.Orange:
return("Oranges");
case RecognizedObjects.Banana:
return("Bananas");
case RecognizedObjects.Strawberry:
return("Strawberries");
}
return("WAT?!");
}
public static string MainImagePath(this RecognizedObjects recognizedObject)
{
switch (recognizedObject)
{
case RecognizedObjects.Apple:
return("images/yellow-apple.jpg");
case RecognizedObjects.Orange:
return("images/oranges.jpg");
case RecognizedObjects.Banana:
return("images/bananas.jpg");
case RecognizedObjects.Strawberry:
return("images/straw.jpg");
}
return(null);
}
private void FinalWeightArrived(double weight)
{
try
{
Application.Current.Dispatcher.Invoke(
DispatcherPriority.Background,
new Action(() =>
{
// Stoppo l'ascolto della bilancia
_scaleManager.StopListening();
RecognizedObjects fruit = RecognizedObjects.Unrecognized;
for (int i = 0; i < 3 && fruit == RecognizedObjects.Unrecognized; ++i)
{
// Prendo l'immagine
var image = CaptureCameraCallback();
var fruitsDirectory = "picturesFruits";
Directory.CreateDirectory(fruitsDirectory);
var imagePath = Path.GetFullPath($@"{fruitsDirectory}/{image}-{Guid.NewGuid().ToString("N")}.jpg");
image.Save(imagePath);
// Riconoscimento
fruit = DoRecognizeObject(imagePath);
}
StopLoader();
// Mostro il risultato
var weightPage = new WeightPage(new ViewModels.WeightPageViewModel(
weight,
fruit));
weightPage.ShowDialog();
// Mi rimetto in ascolto
InitializeScale();
}));
}
catch
{
}
}