/// <summary>
/// Called when device camera initialized.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="CameraOperationCompletedEventArgs"/> instance containing the event data.</param>
private void CameraInitialized(object sender, CameraOperationCompletedEventArgs e)
{
if (e.Succeeded)
{
// Start scan process in separate thread
Deployment.Current.Dispatcher.BeginInvoke(
() =>
{
while (result == null)
{
var cameraBuffer = new WriteableBitmap(
(int)camera.PreviewResolution.Width,
(int)camera.PreviewResolution.Height);
camera.GetPreviewBufferArgb32(cameraBuffer.Pixels);
cameraBuffer.Invalidate();
reader.Decode(cameraBuffer);
}
});
}
else
{
this.result = new BarcodeScannerTask.ScanResult(TaskResult.None);
NavigationService.GoBack();
}
}
/// <summary>
/// Handler for barcode scanner task.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The scan result.</param>
private void TaskCompleted(object sender, BarcodeScannerTask.ScanResult e)
{
PluginResult result;
switch (e.TaskResult)
{
case TaskResult.OK:
result = new PluginResult(PluginResult.Status.OK);
result.Message = JsonHelper.Serialize(new BarcodeResult(e.Barcode));
break;
case TaskResult.Cancel:
// If scan is cancelled we return PluginResult.Status.OK with Message contains cancelled: true
// See plugin docs https://github.com/MSOpenTech/BarcodeScanner#using-the-plugin
result = new PluginResult(PluginResult.Status.OK);
result.Message = JsonHelper.Serialize(new BarcodeResult());
break;
default:
result = new PluginResult(PluginResult.Status.ERROR);
break;
}
this.DispatchCommandResult(result);
}
/// <summary>
/// Called when a page is no longer the active page in a frame.
/// </summary>
/// <param name="e">An object that contains the event data.</param>
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
// If result is null, user is cancelled scan operation
this.result = this.result ?? new BarcodeScannerTask.ScanResult(TaskResult.Cancel);
this.Completed(this, this.result);
this.CleanUp();
base.OnNavigatedFrom(e);
}
/// <summary>
/// Called when a page is no longer the active page in a frame.
/// </summary>
/// <param name="e">An object that contains the event data.</param>
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
// If result is null, user is cancelled scan operation
this.result = this.result ?? new BarcodeScannerTask.ScanResult(TaskResult.Cancel);
this.Completed(this, this.result);
this.CleanUp();
base.OnNavigatedFrom(e);
}
/// <summary>
/// Called when reader find barcode.
/// </summary>
/// <param name="obj">Scan result object.</param>
private void ReaderResultFound(Result obj)
{
VibrateController.Default.Start(TimeSpan.FromMilliseconds(100));
this.result = new BarcodeScannerTask.ScanResult(TaskResult.OK)
{
Barcode = obj
};
NavigationService.GoBack();
}
/// <summary>
/// Called when reader find barcode.
/// </summary>
/// <param name="obj">Scan result object.</param>
private void ReaderResultFound(Result obj)
{
VibrateController.Default.Start(TimeSpan.FromMilliseconds(100));
this.result = new BarcodeScannerTask.ScanResult(TaskResult.OK)
{
Barcode = obj
};
Deployment.Current.Dispatcher.BeginInvoke(() => NavigationService.GoBack());
}
/// <summary>
/// Called when device camera initialized.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="CameraOperationCompletedEventArgs"/> instance containing the event data.</param>
private void CameraInitialized(object sender, CameraOperationCompletedEventArgs e)
{
this.isInit = true;
if (this.shouldDispose)
{
CleanUp();
return;
}
if (e.Succeeded)
{
if (this.camera.IsFlashModeSupported(FlashMode.Off))
{
this.camera.FlashMode = FlashMode.Off;
}
// Start scan process in separate thread
Task.Factory.StartNew(async
(_) =>
{
while (this.result == null)
{
var waitTask = Task.Delay(1500);
if (this.camera.IsFocusSupported)
{
this.camera.Focus();
}
await waitTask;
int width = (int)this.camera.PreviewResolution.Width;
int height = (int)this.camera.PreviewResolution.Height;
int size = width * height;
var cameraBuffer = new int[size];
this.camera.GetPreviewBufferArgb32(cameraBuffer);
var converted = new byte[size * sizeof(int)];
Buffer.BlockCopy(cameraBuffer, 0, converted, 0, converted.Length);
try
{
this.reader.Decode(converted, width, height, RGBLuminanceSource.BitmapFormat.BGRA32);
}
catch (Exception)
{
}
}
}, TaskCreationOptions.LongRunning | TaskCreationOptions.DenyChildAttach, CancellationToken.None);
}
else
{
this.result = new BarcodeScannerTask.ScanResult(TaskResult.None);
NavigationService.GoBack();
}
}
/// <summary>
/// Called when device camera initialized.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="CameraOperationCompletedEventArgs"/> instance containing the event data.</param>
private void CameraInitialized(object sender, CameraOperationCompletedEventArgs e)
{
if (e.Succeeded)
{
if (camera.IsFocusSupported)
{
camera.Focus();
}
// Start scan process in separate thread
this.Dispatcher.BeginInvoke(() => timer.Start());
}
else
{
this.result = new BarcodeScannerTask.ScanResult(TaskResult.None);
NavigationService.GoBack();
}
}
/// <summary>
/// Called when reader find barcode.
/// </summary>
/// <param name="obj">Scan result object.</param>
private void ReaderResultFound(Result obj)
{
VibrateController.Default.Start(TimeSpan.FromMilliseconds(100));
this.result = new BarcodeScannerTask.ScanResult(TaskResult.OK) { Barcode = obj };
NavigationService.GoBack();
}
/// <summary>
/// Called when device camera initialized.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="CameraOperationCompletedEventArgs"/> instance containing the event data.</param>
private void CameraInitialized(object sender, CameraOperationCompletedEventArgs e)
{
if (e.Succeeded)
{
if (camera.IsFocusSupported)
{
camera.Focus();
}
// Start scan process in separate thread
this.Dispatcher.BeginInvoke(() => timer.Start());
}
else
{
this.result = new BarcodeScannerTask.ScanResult(TaskResult.None);
NavigationService.GoBack();
}
}
private void BarcodeScannerUI_BackKeyPress(object sender, CancelEventArgs e)
{
this.result = new BarcodeScannerTask.ScanResult(TaskResult.Cancel);
NavigationService.GoBack();
}
/// <summary>
/// Called when device camera initialized.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="CameraOperationCompletedEventArgs"/> instance containing the event data.</param>
private void CameraInitialized(object sender, CameraOperationCompletedEventArgs e)
{
if (e.Succeeded)
{
// Start scan process in separate thread
Deployment.Current.Dispatcher.BeginInvoke(
() =>
{
while (result == null)
{
var cameraBuffer = new WriteableBitmap(
(int)camera.PreviewResolution.Width,
(int)camera.PreviewResolution.Height);
camera.GetPreviewBufferArgb32(cameraBuffer.Pixels);
cameraBuffer.Invalidate();
reader.Decode(cameraBuffer);
}
});
}
else
{
this.result = new BarcodeScannerTask.ScanResult(TaskResult.None);
NavigationService.GoBack();
}
}
