private void PresentationSourceChangedHandler(object sender, SourceChangedEventArgs args)
{
if (args.NewSource != null)
{
var newSource = (HwndSource)args.NewSource;
source = newSource;
if (source != null)
{
var notifyDpiChanged = !matrix.Equals(source.CompositionTarget.TransformToDevice);
matrix = source.CompositionTarget.TransformToDevice;
sourceHook = SourceHook;
source.AddHook(sourceHook);
if (notifyDpiChanged)
{
managedCefBrowserAdapter.NotifyScreenInfoChanged();
}
}
}
else if (args.OldSource != null)
{
RemoveSourceHook();
}
}
