public void startScannerView(string options)
{
Deployment.Current.Dispatcher.BeginInvoke(delegate()
{
if (canvas == null)
{
string[] paramsList = JsonHelper.Deserialize<string[]>(options);
mwbScanner = this;
kallbackID = paramsList[4];
bool firstTimePageLoad = false;
if (currentPage == null)
{
firstTimePageLoad = true;
currentPage = (((PhoneApplicationFrame)Application.Current.RootVisual).Content as PhoneApplicationPage);
}
var screenWidth = (currentPage.Orientation == PageOrientation.Portrait || currentPage.Orientation == PageOrientation.PortraitUp || currentPage.Orientation == PageOrientation.PortraitDown) ? Application.Current.Host.Content.ActualWidth : Application.Current.Host.Content.ActualHeight;
var screenHeight = (currentPage.Orientation == PageOrientation.Landscape || currentPage.Orientation == PageOrientation.LandscapeLeft || currentPage.Orientation == PageOrientation.LandscapeRight) ? Application.Current.Host.Content.ActualWidth : Application.Current.Host.Content.ActualHeight;
var pX = Convert.ToInt32(paramsList[0]);
var pY = Convert.ToInt32(paramsList[1]);
var pWidth = Convert.ToInt32(paramsList[2]);
var pHeight = Convert.ToInt32(paramsList[3]);
var x = (float)pX / 100 * screenWidth;
var y = (float)pY / 100 * screenHeight;
width = (float)pWidth / 100 * screenWidth;
height = (float)pHeight / 100 * screenHeight;
videoBrush = new System.Windows.Media.VideoBrush();
canvas = new Canvas()
{
Background = videoBrush,
VerticalAlignment = VerticalAlignment.Top,
HorizontalAlignment = HorizontalAlignment.Left
};
float heightTmp = (float)height;
float widthTmp = (float)width;
heightClip = 0;
widthClip = 0;
float AR = (float)screenHeight / (float)screenWidth;
if (width * AR >= height)
{
heightTmp = (int)(width * AR);
heightClip = (float)(heightTmp - height) / 2;
}
else
{
widthTmp = (int)(height / AR);
widthClip = (float)(widthTmp - width) / 2;
}
canvas.Width = widthTmp;
canvas.Height = heightTmp;
RectangleGeometry rg = new RectangleGeometry();
rg.Rect = new System.Windows.Rect(widthClip, heightClip, width, height);
canvas.Clip = rg;
canvas.Margin = new Thickness(x - widthClip, y - heightClip, 0, 0);
(currentPage.FindName("LayoutRoot") as Grid).Children.Add(canvas);
scannerPage = new ScannerPage();
scannerPage.videoBrush = videoBrush;
ScannerPage.isPage = false;
scannerPage.InitializeCamera(CameraSensorLocation.Back);
scannerPage.fixOrientation(currentPage.Orientation);
setAutoRect();
if ((int)ScannerPage.param_OverlayMode == 1)
{
MWOverlay.addOverlay(canvas);
}
else if((int)ScannerPage.param_OverlayMode == 2)
{
imgOverlay = new Image() { Stretch = Stretch.Fill,
Width = width,
Height = height,
Margin = new Thickness(widthClip,heightClip,0,0)
};
BitmapImage BitImg = new BitmapImage(new Uri("/Plugins/com.manateeworks.barcodescanner/overlay_mw.png", UriKind.Relative));
imgOverlay.Source = BitImg;
canvas.Children.Add(imgOverlay);
}
if (firstTimePageLoad)
{
currentPage.NavigationService.Navigating += delegate
{
stopScanner("");
};
currentPage.OrientationChanged += delegate
{
Deployment.Current.Dispatcher.BeginInvoke(delegate()
{
if (canvas != null)
{
if ((int)ScannerPage.param_OverlayMode == 1)
{
MWOverlay.removeOverlay();
}
screenWidth = (currentPage.Orientation == PageOrientation.Portrait || currentPage.Orientation == PageOrientation.PortraitUp || currentPage.Orientation == PageOrientation.PortraitDown) ? Application.Current.Host.Content.ActualWidth : Application.Current.Host.Content.ActualHeight;
screenHeight = (currentPage.Orientation == PageOrientation.Landscape || currentPage.Orientation == PageOrientation.LandscapeLeft || currentPage.Orientation == PageOrientation.LandscapeRight) ? Application.Current.Host.Content.ActualWidth : Application.Current.Host.Content.ActualHeight;
x = (float)pX / 100 * screenWidth;
y = (float)pY / 100 * screenHeight;
width = (float)pWidth / 100 * screenWidth;
height = (float)pHeight / 100 * screenHeight;
heightTmp = (float)height;
widthTmp = (float)width;
heightClip = 0;
widthClip = 0;
AR = (float)screenHeight / (float)screenWidth;
if (width * AR >= height)
{
heightTmp = (float)(width * AR);
heightClip = (float)(heightTmp - height) / 2;
}
else
{
widthTmp = (float)(height / AR);
widthClip = (float)(widthTmp - width) / 2;
}
canvas.Width = widthTmp;
canvas.Height = heightTmp;
rg = new RectangleGeometry();
rg.Rect = new System.Windows.Rect(widthClip, heightClip, width, height);
canvas.Clip = rg;
canvas.Margin = new Thickness(x - widthClip, y - heightClip, 0, 0);
scannerPage.fixOrientation(currentPage.Orientation);
setAutoRect();
if ((int)ScannerPage.param_OverlayMode == 1) {
Observable
.Timer(TimeSpan.FromMilliseconds(100))
.SubscribeOnDispatcher()
.Subscribe(_ =>
{
Deployment.Current.Dispatcher.BeginInvoke(delegate()
{
MWOverlay.addOverlay(canvas);
});
});
}
else if ((int)ScannerPage.param_OverlayMode == 2)
{
imgOverlay.Width = width;
imgOverlay.Height = height;
imgOverlay.Margin = new Thickness(widthClip, heightClip, 0, 0);
}
}
});
};
}
}
else
{
setAutoRect();
}
});
}
public void stopScanner(string options)
{
if (canvas != null)
{
Deployment.Current.Dispatcher.BeginInvoke(delegate()
{
BarcodeScannerPage.ScannerPage.cameraDevice.Dispose();
if ((int)ScannerPage.param_OverlayMode == 1)
{
MWOverlay.removeOverlay();
}
else if ((int)ScannerPage.param_OverlayMode == 1)
{
canvas.Children.Remove(imgOverlay);
}
(currentPage.FindName("LayoutRoot") as Grid).Children.Remove(canvas);
scannerPage.stopCamera();
scannerPage = null;
canvas = null;
videoBrush = null;
});
}
}