private async Task Create_Scanner()
{
try
{
this.session = DbFactory.Open(App.ConnectionString);
this.scanner = new QXScanner();
if (this.deviceType == DeviceFormFactorType.Phone)
{
this.scanner.IsMobile = true;
this.vibDevice = VibrationDevice.GetDefault();
}
this.scanner.IsFront = false;
this.scanner.Interval = 300;
this.scanner.CaptureStart += Scanner_CaptureStart;
this.scanner.CaptureImage += Scanner_CaptureImage;
this.scanner.CaptureFail += Scanner_CaptureFail;
await this.scanner.SetPreviewAsync(this.PreviewControl);
await this.scanner.Start(_displayInformation.CurrentOrientation);
}
catch (Exception ex)
{
await App.Logger.Write("Initialize Fail: " + ex.Message);
//camera error
var dialog = new MessageDialog(ex.Message, "Initialize Fail");
dialog.Commands.Add(new UICommand("OK")
{
Id = 0
});
var result = await dialog.ShowAsync();
var action = (int)result.Id;
}
}
private void UpdateButtonOrientation()
{
int device = QXScanner.ConvertDeviceOrientationToDegrees(_deviceOrientation);
int display = QXScanner.ConvertDisplayOrientationToDegrees(_displayOrientation);
if (_displayInformation.NativeOrientation == DisplayOrientations.Portrait)
{
device -= 90;
}
// Combine both rotations and make sure that 0 <= result < 360
var angle = (360 + display + device) % 360;
// Rotate the buttons in the UI to match the rotation of the device
var transform = new RotateTransform {
Angle = angle
};
this.btnList.RenderTransform = transform;
this.btnOpen.RenderTransform = transform;
}
private async Task Clean_Scanner()
{
if (this.scanner != null)
{
this.scanner.CaptureStart -= Scanner_CaptureStart;
this.scanner.CaptureImage -= Scanner_CaptureImage;
this.scanner.CaptureFail -= Scanner_CaptureFail;
this.scanner.Dispose();
this.scanner = null;
}
if (this.session != null)
{
this.session.Close();
this.session = null;
}
_displayInformation.OrientationChanged -= DisplayInformation_OrientationChanged;
DisplayInformation.AutoRotationPreferences = DisplayOrientations.None;
if (this._orientationSensor != null)
{
this._orientationSensor.OrientationChanged -= OrientationSensor_OrientationChanged;
}
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// Cleanup the UI
this.PreviewControl.Source = null;
// Allow the device screen to sleep now that the preview is stopped
_displayRequest.RequestRelease();
});
}
