public CustomScanPage() : base()
{
result = null;
zxing = new ZXingScannerView
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand
};
SetScanOptions();
zxing.OnScanResult += Zxing_OnScanResult;
var inText = new Label
{
HeightRequest = 32,
WidthRequest = 120,
BackgroundColor = Color.White,
Text = "",
FontSize = 28,
FontAttributes = FontAttributes.Bold,
VerticalTextAlignment = TextAlignment.Center,
HorizontalTextAlignment = TextAlignment.Center
};
string[] texts = new string[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "⬅", "0", "▶" };
var buttons = new Button[texts.Length];
for (var j = 0; j < texts.Length; j++)
{
buttons[j] = new Button {
Text = texts[j], WidthRequest = 65, HeightRequest = 65, CornerRadius = 6, FontSize = 28, FontAttributes = FontAttributes.Bold
};
buttons[j].Clicked += (s, e) =>
{
if (int.TryParse((s as Button).Text, out int num))
{
inText.Text += (s as Button).Text;
}
else if ((s as Button).Text == "⬅")
{
if (inText.Text.Length > 0)
{
inText.Text = inText.Text.Substring(0, inText.Text.Length - 1);
}
}
else
{
zxing.RaiseScanResult(new ZXing.Result(inText.Text, Encoding.ASCII.GetBytes(inText.Text), null, ZXing.BarcodeFormat.QR_CODE));
}
};
}
var customKeyboard = new Grid
{
RowDefinitions = new RowDefinitionCollection {
new RowDefinition {
Height = 38
}, new RowDefinition {
Height = 72
}, new RowDefinition {
Height = 72
}, new RowDefinition {
Height = 72
}, new RowDefinition {
Height = 72
}
},
ColumnDefinitions = new ColumnDefinitionCollection {
new ColumnDefinition {
Width = 72
}, new ColumnDefinition {
Width = 72
}, new ColumnDefinition {
Width = 72
}
},
VerticalOptions = LayoutOptions.End,
HorizontalOptions = LayoutOptions.Center,
IsVisible = false,
BackgroundColor = Color.FromRgba(1.0, 1.0, 1.0, 0.7),
Padding = new Thickness(10, 5, 10, 2)
};
customKeyboard.Children.Add(inText, 0, 0);
for (var j = 0; j < texts.Length; j++)
{
customKeyboard.Children.Add(buttons[j], j % 3, 1 + (int)(j / 3));
}
Grid.SetColumnSpan(inText, 3);
var torch = new ImageButton
{
Source = "torch.png",
VerticalOptions = LayoutOptions.End,
HorizontalOptions = LayoutOptions.End,
HeightRequest = 96,
WidthRequest = 96
};
torch.Clicked += delegate
{
zxing.ToggleTorch();
};
var keyboard = new ImageButton
{
Source = "numeric.png",
VerticalOptions = LayoutOptions.End,
HorizontalOptions = LayoutOptions.Start,
HeightRequest = 96,
WidthRequest = 96
};
keyboard.Clicked += delegate
{
if (customKeyboard.IsVisible)
{
customKeyboard.IsVisible = false;
}
else
{
customKeyboard.IsVisible = true;
}
};
var abort = new Button
{
Text = Language.GetText("Cancel"),
HorizontalOptions = LayoutOptions.FillAndExpand,
TextColor = Color.White,
HeightRequest = 300
};
abort.Clicked += delegate
{
zxing.RaiseScanResult(null);
};
var customOverlayTop = new StackLayout
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
BackgroundColor = Color.Black,
Opacity = 0.7,
Children =
{
new Label
{
HeightRequest = 20,
},
new Label
{
Text = Language.GetText("AppTitle"),
HorizontalTextAlignment = TextAlignment.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
TextColor = Color.White
},
new Label
{
Text = "Scan QR code...",
HorizontalTextAlignment = TextAlignment.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
TextColor = Color.White
}
}
};
var customOverlayCenter = new Grid
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
Opacity = 0.7,
Children =
{
new Image
{
VerticalOptions = LayoutOptions.CenterAndExpand,
HorizontalOptions = LayoutOptions.Center,
Source = "scanl1.png",
Aspect = Aspect.AspectFit
},
new Image
{
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
Source = "scanl2.png",
Aspect = Aspect.AspectFill
},
new Xamarin.Forms.Shapes.Rectangle
{
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
WidthRequest = 170,
HeightRequest = 170,
Stroke = Brush.Black,
StrokeThickness = 1,
RadiusX = 3,
RadiusY = 3
},
torch,
keyboard,
customKeyboard
}
};
var customOverlayBottom = new StackLayout
{
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
BackgroundColor = Color.Black,
Opacity = 0.7,
Padding = new Thickness(0, 10, 0, 10),
};
customOverlayBottom.Children.Add(abort);
//if(zxing.HasTorch) customOverlayBottom.Children.Add(torch); BUG on library, this returns always FALSE
//customOverlayBottom.Children.Add(torch);
var customOverlay = new Grid
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = new GridLength(1, GridUnitType.Star)
},
new RowDefinition {
Height = new GridLength(2, GridUnitType.Star)
},
new RowDefinition {
Height = new GridLength(1, GridUnitType.Star)
}
},
Children =
{
customOverlayTop,
customOverlayCenter,
customOverlayBottom
}
};
Grid.SetRow(customOverlayTop, 0);
Grid.SetRow(customOverlayCenter, 1);
Grid.SetRow(customOverlayBottom, 2);
var grid = new Grid
{
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
};
grid.Children.Add(zxing);
grid.Children.Add(customOverlay);
// The root page of your application
Content = grid;
}
public CustomScanPage() : base()
{
result = null;
zxing = new ZXingScannerView
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand
};
SetScanOptions();
zxing.OnScanResult += Zxing_OnScanResult;
var torch = new Button
{
Text = Language.GetText("Torch"),
HorizontalOptions = LayoutOptions.FillAndExpand,
TextColor = Color.White
};
torch.Clicked += delegate {
zxing.ToggleTorch();
};
var abort = new Button
{
Text = Language.GetText("Cancel"),
HorizontalOptions = LayoutOptions.FillAndExpand,
TextColor = Color.White
};
abort.Clicked += delegate {
zxing.RaiseScanResult(null);
};
var customOverlayTop = new StackLayout
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
BackgroundColor = Color.Black,
Opacity = 0.7,
Children =
{
new Label
{
HeightRequest = 20,
},
new Label
{
Text = Language.GetText("AppTitle"),
HorizontalTextAlignment = TextAlignment.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
TextColor = Color.White
},
new Label
{
Text = "Scan QR code...",
HorizontalTextAlignment = TextAlignment.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
TextColor = Color.White
}
}
};
var customOverlayCenter = new Grid
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
Opacity = 0.6,
Children =
{
new Image
{
VerticalOptions = LayoutOptions.CenterAndExpand,
HorizontalOptions = LayoutOptions.Center,
Source = "scanl1.png",
Aspect = Aspect.AspectFit
},
new Image
{
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = LayoutOptions.CenterAndExpand,
Source = "scanl2.png",
Aspect = Aspect.AspectFill
}
}
};
var customOverlayBottom = new StackLayout
{
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
BackgroundColor = Color.Black,
Opacity = 0.7,
Padding = new Thickness(0, 10, 0, 10),
};
customOverlayBottom.Children.Add(abort);
//if(zxing.HasTorch) customOverlayBottom.Children.Add(torch); BUG on library, this returns always FALSE
customOverlayBottom.Children.Add(torch);
var customOverlay = new Grid
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = new GridLength(1, GridUnitType.Star)
},
new RowDefinition {
Height = new GridLength(2, GridUnitType.Star)
},
new RowDefinition {
Height = new GridLength(1, GridUnitType.Star)
}
},
Children =
{
customOverlayTop,
customOverlayCenter,
customOverlayBottom
}
};
Grid.SetRow(customOverlayTop, 0);
Grid.SetRow(customOverlayCenter, 1);
Grid.SetRow(customOverlayBottom, 2);
var grid = new Grid
{
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
};
grid.Children.Add(zxing);
grid.Children.Add(customOverlay);
// The root page of your application
Content = grid;
}