public HomePage() : base()
{
buttonScanDefaultOverlay = new Button
{
Text = "Scan with Default Overlay",
AutomationId = "scanWithDefaultOverlay",
};
buttonScanDefaultOverlay.Clicked += async delegate
{
scanPage = new ZXingScannerPage();
scanPage.OnScanResult += (result) =>
{
scanPage.IsScanning = false;
Device.BeginInvokeOnMainThread(() =>
{
Navigation.PopAsync();
DisplayAlert("Scanned Barcode", result.Text, "OK");
});
};
await Navigation.PushAsync(scanPage);
};
buttonScanCustomOverlay = new Button
{
Text = "Scan with Custom Overlay",
AutomationId = "scanWithCustomOverlay",
};
buttonScanCustomOverlay.Clicked += async delegate
{
// Create our custom overlay
var customOverlay = new StackLayout
{
Spacing = 0,
Padding = 10,
BackgroundColor = Color.Black,
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.Start
};
var fotoButton = new Button()
{
Text = "Foto",
WidthRequest = 150,
HeightRequest = 40,
BorderRadius = 10,
TextColor = Color.White,
BackgroundColor = Color.Black,
BorderColor = Color.White
};
var QRCodeButton = new Button()
{
WidthRequest = 150,
HeightRequest = 40,
Text = "QR Code",
BorderRadius = 10,
TextColor = Color.Black,
BackgroundColor = Color.White,
BorderColor = Color.White
};
var circleButton = new Button();
var imageGrid = new Grid();
fotoButton.Clicked += delegate
{
fotoButton.TextColor = Color.Black;
fotoButton.BackgroundColor = Color.White;
QRCodeButton.TextColor = Color.White;
QRCodeButton.BackgroundColor = Color.Black;
imageGrid.IsVisible = true;
//scanPage.IsScanning = false;
//scanPage.IsAnalyzing = false;
};
QRCodeButton.Clicked += delegate
{
QRCodeButton.TextColor = Color.Black;
QRCodeButton.BackgroundColor = Color.White;
fotoButton.TextColor = Color.White;
fotoButton.BackgroundColor = Color.Black;
imageGrid.IsVisible = false;
//scanPage.IsScanning = true;
//scanPage.IsAnalyzing = true;
};
var torch = new Button
{
Text = "T",
WidthRequest = 40,
HeightRequest = 40,
BorderRadius = 10,
TextColor = Color.White,
BackgroundColor = Color.Black,
};
torch.Clicked += delegate
{
scanPage.ToggleTorch();
if (scanPage.IsTorchOn)
{
torch.TextColor = Color.Black;
torch.BackgroundColor = Color.White;
}
else
{
torch.TextColor = Color.White;
torch.BackgroundColor = Color.Black;
}
};
customOverlay.Children.Add(fotoButton);
customOverlay.Children.Add(QRCodeButton);
customOverlay.Children.Add(torch);
var rootGrid = new Grid();
rootGrid.RowSpacing = 0;
rootGrid.ColumnSpacing = 0;
rootGrid.RowDefinitions = new RowDefinitionCollection()
{
new RowDefinition()
{
Height = 60
},
new RowDefinition()
{
Height = new GridLength(1, GridUnitType.Star)
},
new RowDefinition()
{
Height = 80
},
};
rootGrid.Children.Add(customOverlay, 0, 0);
imageGrid.BackgroundColor = Color.Black;
imageGrid.IsVisible = false;
imageGrid.RowSpacing = 0;
imageGrid.ColumnSpacing = 0;
imageGrid.ColumnDefinitions = new ColumnDefinitionCollection()
{
new ColumnDefinition()
{
Width = 60
},
new ColumnDefinition()
{
Width = new GridLength(1, GridUnitType.Star)
},
};
imageGrid.RowDefinitions = new RowDefinitionCollection()
{
new RowDefinition()
{
Height = GridLength.Auto
},
new RowDefinition()
{
Height = GridLength.Auto
}
};
image = new Image();
image.Aspect = Aspect.AspectFill;
image.HorizontalOptions = LayoutOptions.Center;
image.VerticalOptions = LayoutOptions.Center;
//image.Source = new UriImageSource() { Uri = new Uri("https://cloud.netlifyusercontent.com/assets/344dbf88-fdf9-42bb-adb4-46f01eedd629/242ce817-97a3-48fe-9acd-b1bf97930b01/09-posterization-opt.jpg") };
image.WidthRequest = 50;
image.HeightRequest = 50;
image.GestureRecognizers.Add(new TapGestureRecognizer()
{
Command = new Command(async o =>
{
var cameraStatus = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Camera);
var storageStatus = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Storage);
if (cameraStatus != PermissionStatus.Granted || storageStatus != PermissionStatus.Granted)
{
var results = await CrossPermissions.Current.RequestPermissionsAsync(new[] { Permission.Camera, Permission.Storage });
cameraStatus = results[Permission.Camera];
storageStatus = results[Permission.Storage];
}
if (cameraStatus == PermissionStatus.Granted && storageStatus == PermissionStatus.Granted)
{
var file = await CrossMedia.Current.PickPhotoAsync();
}
else
{
await DisplayAlert("Permissions Denied", "Unable to take photos.", "OK");
//On iOS you may want to send your user to the settings screen.
//CrossPermissions.Current.OpenAppSettings();
}
})
});
circleButton.HorizontalOptions = LayoutOptions.Center;
circleButton.VerticalOptions = LayoutOptions.Center;
circleButton.WidthRequest = 60;
circleButton.HeightRequest = 60;
circleButton.BorderRadius = 30;
circleButton.BorderColor = Color.Black;
circleButton.BackgroundColor = Color.White;
var fotoLabel = new Label();
fotoLabel.Text = "FOTO";
fotoLabel.TextColor = Color.FromRgb(255, 197, 45);
fotoLabel.FontSize = 14;
fotoLabel.HorizontalOptions = LayoutOptions.Center;
fotoLabel.HorizontalTextAlignment = TextAlignment.Center;
imageGrid.Children.Add(fotoLabel, 0, 0);
Grid.SetColumnSpan(fotoLabel, 2);
imageGrid.Children.Add(image, 0, 1);
imageGrid.Children.Add(circleButton, 0, 1);
Grid.SetColumnSpan(circleButton, 2);
circleButton.Command = new Command(() =>
{
scanPage.GetPicture();
});
rootGrid.Children.Add(imageGrid, 0, 2);
//rootGrid.Children.Add(image, 0, 1);
scanPage = new ZXingScannerPage(new ZXing.Mobile.MobileBarcodeScanningOptions
{
AutoRotate = true,
CameraResolutionSelector = resolutions => resolutions.First(),
}, customOverlay: rootGrid);
scanPage.OnPictureTaken += OnPictureTaken;
NavigationPage.SetHasNavigationBar(scanPage, false);
scanPage.OnScanResult += (result) =>
{
scanPage.IsScanning = false;
Device.BeginInvokeOnMainThread(() =>
{
Navigation.PopAsync();
DisplayAlert("Scanned Barcode", result.Text, "OK");
});
};
await Navigation.PushAsync(scanPage);
};
buttonScanContinuously = new Button
{
Text = "Scan Continuously",
AutomationId = "scanContinuously",
};
buttonScanContinuously.Clicked += async delegate
{
scanPage = new ZXingScannerPage(new ZXing.Mobile.MobileBarcodeScanningOptions
{
DelayBetweenContinuousScans = 300
});
scanPage.OnScanResult += (result) =>
Device.BeginInvokeOnMainThread(() =>
DisplayAlert("Scanned Barcode", result.Text, "OK"));
await Navigation.PushAsync(scanPage);
};
buttonScanCustomPage = new Button
{
Text = "Scan with Custom Page",
AutomationId = "scanWithCustomPage",
};
buttonScanCustomPage.Clicked += async delegate
{
var customScanPage = new CustomScanPage();
await Navigation.PushAsync(customScanPage);
};
buttonGenerateBarcode = new Button
{
Text = "Barcode Generator",
AutomationId = "barcodeGenerator",
};
buttonGenerateBarcode.Clicked += async delegate
{
await Navigation.PushAsync(new BarcodePage());
};
var stack = new StackLayout();
stack.Children.Add(buttonScanDefaultOverlay);
stack.Children.Add(buttonScanCustomOverlay);
stack.Children.Add(buttonScanContinuously);
stack.Children.Add(buttonScanCustomPage);
stack.Children.Add(buttonGenerateBarcode);
Content = stack;
}