private async void CameraView_OnDetected(object sender, GoogleVisionBarCodeScanner.OnDetectedEventArg e)
{
List <GoogleVisionBarCodeScanner.BarcodeResult> obj = e.BarcodeResults;
string result = string.Empty;
for (int i = 0; i < obj.Count; i++)
{
result += $"Type : {obj[i].BarcodeType}, Value : {obj[i].DisplayValue}{Environment.NewLine}";
}
Device.BeginInvokeOnMainThread(async() =>
{
await DisplayAlert("Result", result, "OK");
await Navigation.PopModalAsync();
});
}
private async void CameraView_OnDetected(object sender, GoogleVisionBarCodeScanner.OnDetectedEventArg e)
{
Device.BeginInvokeOnMainThread(() => GoogleVisionBarCodeScanner.Methods.SetIsScanning(true));
List <GoogleVisionBarCodeScanner.BarcodeResult> barcodes = e.BarcodeResults;
foreach (var barcode in barcodes)
{
RealtimeBarcodeInfo info;
Point target = new Point(barcode.Points[0].x * grid.Width, barcode.Points[0].y * grid.Height);
if (!BarcodeInfo.ContainsKey(barcode.DisplayValue))
{
//found new barcode
info = new RealtimeBarcodeInfo()
{
Text = $"{barcode.DisplayValue}\n{barcode.BarcodeType}",
CurrentPosition = target
};
BarcodeInfo[barcode.DisplayValue] = info;
await Device.InvokeOnMainThreadAsync(() =>
{
/*
* Create GUI for new barcode
*
* Frame - transparent, fully covers camera view
* -Grid - margin is set on this to adjust position
* -Label - Content
*/
var frame = new Frame()
{
Padding = 0,
BackgroundColor = Color.Transparent
};
var barcodeGrid = new Grid()
{
BackgroundColor = Color.Cyan,
Opacity = .85d,
Margin = new Thickness(0, 0, 0, 0),
WidthRequest = 200,
HeightRequest = 75,
HorizontalOptions = LayoutOptions.Start,
VerticalOptions = LayoutOptions.Start
};
barcodeGrid.RowDefinitions.Add(new RowDefinition()
{
Height = GridLength.Star
});
frame.Content = barcodeGrid;
var textLabel = new Label()
{
Text = info.Text
};
barcodeGrid.Children.Add(textLabel);
Grid.SetRow(textLabel, 0);
info.OuterFrame = frame;
info.Grid = barcodeGrid;
info.TextLabel = textLabel;
grid.Children.Add(frame);
Grid.SetRow(frame, 1);
});
}
else
{
info = BarcodeInfo[barcode.DisplayValue];
}
info.LastScanned = DateTime.Now;
info.TargetPosition = target;
}
}
