protected override void OnElementChanged(ElementChangedEventArgs <ZXingScannerView> e)
{
AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
formsView = Element;
if (zxingView == null)
{
// Process requests for autofocus
formsView.AutoFocusRequested += (x, y) => {
if (zxingView != null)
{
if (x < 0 && y < 0)
{
zxingView.AutoFocus();
}
else
{
zxingView.AutoFocus(x, y);
}
}
};
zxingView = new iOSZXing.ZXingScannerView();
zxingView.UseCustomOverlayView = true;
zxingView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
base.SetNativeControl(zxingView);
if (formsView.IsScanning)
{
zxingView.StartScanning(formsView.RaiseScanResult, formsView.Options);
}
if (!formsView.IsAnalyzing)
{
zxingView.PauseAnalysis();
}
if (formsView.IsTorchOn)
{
zxingView.Torch(formsView.IsTorchOn);
}
}
base.OnElementChanged(e);
}
public CustomScanPage () : base ()
{
zxing = new ZXingScannerView
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
AutomationId = "zxingScannerView",
};
zxing.OnScanResult += (result) =>
Device.BeginInvokeOnMainThread (async () => {
// Stop analysis until we navigate away so we don't keep reading barcodes
zxing.IsAnalyzing = false;
// Show an alert
await DisplayAlert ("Scanned Barcode", result.Text, "OK");
// Navigate away
await Navigation.PopAsync ();
});
overlay = new ZXingDefaultOverlay
{
TopText = "Hold your phone up to the barcode",
BottomText = "Scanning will happen automatically",
ShowFlashButton = zxing.HasTorch,
AutomationId = "zxingDefaultOverlay",
};
overlay.FlashButtonClicked += (sender, e) => {
zxing.IsTorchOn = !zxing.IsTorchOn;
};
var grid = new Grid
{
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
};
grid.Children.Add(zxing);
grid.Children.Add(overlay);
// The root page of your application
Content = grid;
}
public ZXingScannerPage(MobileBarcodeScanningOptions options = null, View customOverlay = null) : base()
{
zxing = new ZXingScannerView
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
Options = options,
AutomationId = "zxingScannerView"
};
zxing.SetBinding(ZXingScannerView.IsTorchOnProperty, new Binding(nameof(IsTorchOn)));
zxing.SetBinding(ZXingScannerView.IsAnalyzingProperty, new Binding(nameof(IsAnalyzing)));
zxing.SetBinding(ZXingScannerView.IsScanningProperty, new Binding(nameof(IsScanning)));
zxing.SetBinding(ZXingScannerView.HasTorchProperty, new Binding(nameof(HasTorch)));
zxing.SetBinding(ZXingScannerView.ResultProperty, new Binding(nameof(Result)));
zxing.OnScanResult += (result) =>
{
this.OnScanResult?.Invoke(result);
//Device.BeginInvokeOnMainThread (() => eh (result));
};
zxing.OnTakePicture += OnTakePicture;
if (customOverlay == null)
{
defaultOverlay = new ZXingDefaultOverlay()
{
AutomationId = "zxingDefaultOverlay"
};
defaultOverlay.SetBinding(ZXingDefaultOverlay.TopTextProperty, new Binding(nameof(DefaultOverlayTopText)));
defaultOverlay.SetBinding(ZXingDefaultOverlay.BottomTextProperty, new Binding(nameof(DefaultOverlayBottomText)));
defaultOverlay.SetBinding(ZXingDefaultOverlay.ShowFlashButtonProperty, new Binding(nameof(DefaultOverlayShowFlashButton)));
DefaultOverlayTopText = "Hold your phone up to the barcode";
DefaultOverlayBottomText = "Scanning will happen automatically";
DefaultOverlayShowFlashButton = HasTorch;
defaultOverlay.FlashButtonClicked += (sender, e) =>
{
zxing.IsTorchOn = !zxing.IsTorchOn;
};
Overlay = defaultOverlay;
}
else
{
Overlay = customOverlay;
}
var grid = new Grid
{
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
};
grid.Children.Add(zxing);
grid.Children.Add(Overlay);
// The root page of your application
Content = grid;
}