void SetupLiveCameraStream()
{
_captureSession = new AVCaptureSession();
var viewLayer = _liveCameraStream.Layer;
_videoPreviewLayer = new AVCaptureVideoPreviewLayer(_captureSession)
{
Frame = _liveCameraStream.Bounds
};
_liveCameraStream.AddObserver("bounds", NSKeyValueObservingOptions.New, ObservedBoundsChange);
_liveCameraStream.Layer.AddSublayer(_videoPreviewLayer);
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
ConfigureCameraForDevice(captureDevice);
_captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
var dictionary = new NSMutableDictionary();
dictionary[AVVideo.CodecKey] = new NSNumber((int)AVVideoCodec.JPEG);
_stillImageOutput = new AVCaptureStillImageOutput {
OutputSettings = new NSDictionary()
};
_captureSession.AddOutput(_stillImageOutput);
_captureSession.AddInput(_captureDeviceInput);
_captureSession.StartRunning();
}
protected override void OnAttached()
{
_viewLifecycleEffect = Element.Effects.OfType <ViewLifecycleEffect>().FirstOrDefault();
UIView nativeView = Control ?? Container;
_isLoadedObserverDisposable = nativeView?.AddObserver("superview", ObservingOptions, IsViewLoadedObserver);
}
public override void WillMoveToSuperview(UIView newsuper)
{
base.WillMoveToSuperview(newsuper);
if (newsuper != null)
{
frameObserver = newsuper.AddObserver("frame", NSKeyValueObservingOptions.Initial | NSKeyValueObservingOptions.New, OnFrameChanged);
}
}
void SubscribeToDrawn(UIView elem)
{
if (elem is IDrawnObservable)
{
_observers.Add(elem.AddObserver(nameof(IDrawnObservable.Drawn), NSKeyValueObservingOptions.OldNew, HandleDrawnObserved));
}
foreach (var child in elem.Subviews)
{
SubscribeToDrawn(child);
}
}
public static void SetBinding(this UIView view, string propertyName, BindingBase bindingBase,
string updateSourceEventName = null)
{
var binding = bindingBase as Binding;
//This will allow setting bindings from Xaml by reusing the MarkupExtension
updateSourceEventName = updateSourceEventName ?? binding?.UpdateSourceEventName;
if (!IsNullOrEmpty(updateSourceEventName))
{
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, updateSourceEventName);
return;
}
NativeViewPropertyListener nativePropertyListener = null;
if (bindingBase.Mode == BindingMode.TwoWay)
{
nativePropertyListener = new NativeViewPropertyListener(propertyName);
try
{
//TODO: We need to figure a way to map the value back to the real objectiveC property.
//the X.IOS camelcase property name won't work
var key = new Foundation.NSString(propertyName.ToLower());
var valueKey = view.ValueForKey(key);
if (valueKey != null)
{
view.AddObserver(nativePropertyListener, key, Foundation.NSKeyValueObservingOptions.New, IntPtr.Zero);
}
}
#if __MOBILE__
catch (Foundation.MonoTouchException ex)
{
nativePropertyListener = null;
if (ex.Name == "NSUnknownKeyException")
{
System.Diagnostics.Debug.WriteLine("KVO not supported, try specify a UpdateSourceEventName instead.");
return;
}
throw ex;
}
#else
catch (Exception ex)
{
throw ex;
}
#endif
}
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, nativePropertyListener);
}
public void ObserverTest()
{
bool observed = false;
using (var o = new UIView()) {
using (var observer = o.AddObserver("frame", NSKeyValueObservingOptions.OldNew, change => {
var old = ((NSValue)change.OldValue).CGRectValue;
var @new = ((NSValue)change.NewValue).CGRectValue;
Assert.AreEqual("{X=0,Y=0,Width=0,Height=0}", old.ToString(), "#old");
Assert.AreEqual("{X=0,Y=0,Width=123,Height=234}", @new.ToString(), "#new");
observed = true;
})) {
o.Frame = new RectangleF(0, 0, 123, 234);
}
}
Assert.IsTrue(observed, "observed");
}
public void SubscribeToDrawn(UIView elem)
{
if (!PerformanceTrackerRenderer.EnableInstrumentation)
{
return;
}
if (elem != _View && elem is IDrawnObservable)
{
_observers.Add(elem.AddObserver(nameof(IDrawnObservable.Drawn), NSKeyValueObservingOptions.OldNew, HandleDrawnObserved));
}
foreach (var child in elem.Subviews)
{
SubscribeToDrawn(child);
}
}
public static void SetBinding(this UIView view, string propertyName, BindingBase bindingBase, string updateSourceEventName = null)
{
var binding = bindingBase as Binding;
//This will allow setting bindings from Xaml by reusing the MarkupExtension
updateSourceEventName = updateSourceEventName ?? binding?.UpdateSourceEventName;
if (!IsNullOrEmpty(updateSourceEventName))
{
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, updateSourceEventName);
return;
}
NativeViewPropertyListener nativePropertyListener = null;
if (bindingBase.Mode == BindingMode.TwoWay) {
nativePropertyListener = new NativeViewPropertyListener(propertyName);
view.AddObserver(nativePropertyListener, propertyName, 0, IntPtr.Zero);
}
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, nativePropertyListener);
}