static IControl ImageImpl(
IScheduler dispatcher,
IObservable <IImage> streams,
Optional <IObservable <Color> > overlayColor,
Optional <IObservable <IColorMap> > colorMap,
Optional <IObservable <Ratio <Pixels, Points> > > dpiOverride)
{
BehaviorSubject <Size <Points> > desiredSize = new BehaviorSubject <Size <Points> >(Size.Zero <Points>());
return(Control.Create(
ctrl =>
{
var dummyControl = new DpiAwareView()
{
AutoresizesSubviews = true
};
ctrl.BindNativeDefaults(dummyControl, dispatcher);
var tintedImage = new TintedImage()
{
AutoresizingMask = NSViewResizingMask.WidthSizable | NSViewResizingMask.HeightSizable
};
dummyControl.AddSubview(tintedImage);
ctrl.BindNativeProperty(dispatcher, "image", dpiOverride.Or(dummyControl.GetDpi())
.CombineLatest(streams, colorMap.Select(x => x.Select(Optional.Some)).Or(Observable.Return <Optional <IColorMap> >(Optional.None())),
(dpi, imgStreams, cm) => new { dpi, imgStreams, colorMap = cm }),
x =>
{
var iv = x.imgStreams.Load <NSImage>(x.dpi, x.colorMap);
tintedImage.CurrentImage = iv.Image;
tintedImage.SetFrameSize(dummyControl.Frame.Size);
var size = Size.Create <Pixels>((double)iv.Image.Size.Width, (double)iv.Image.Size.Height) / iv.ScaleFactor;
desiredSize.OnNext(size);
});
overlayColor.Do(
colorObs =>
{
ctrl.BindNativeProperty(
dispatcher,
"tintColor",
colorObs,
color => tintedImage.TintColor = color.ToNSColor());
});
return dummyControl;
}).WithSize(desiredSize.Transpose()));
}