public ForeignWpfHook <T> HookWpfWindow <T>(IntPtr hWnd, Type tHandler, object oParam = null)
where T : class
{
Contract.Requires(tHandler != null);
Contract.Requires(typeof(IWpfWindowHook).IsAssignableFrom(tHandler));
var source = new DcsMarshalledSource <T>();
var record = WpfHookRegistrationRecord.Create(hWnd, tHandler, typeof(T), oParam);
var rh = Hook.RegisterWpfHook(record, source.ComProxy);
return(new ForeignWpfHook <T>(rh, source));
}
public static IWpfWindowHook Hook(WpfHookRegistrationRecord record, IDcsMarshalledObserver observer)
{
// get visual
var hwndSource = HwndSource.FromHwnd(record.HWnd);
if (hwndSource == null)
{
throw new InvalidOperationException($"HwndSource 0x{record.HWnd.ToInt32():x8} not found");
}
var rootVisual = hwndSource.RootVisual;
if (rootVisual == null)
{
throw new InvalidOperationException("RootVisual is null");
}
// get result source
var resultType = record.ResultType;
var tObserver = typeof(IObserver <>).MakeGenericType(resultType);
var tSource = typeof(DcsMarshalledProxy <>).MakeGenericType(resultType);
var tSourceCtor = tSource.GetConstructor(new[] { typeof(IDcsMarshalledObserver) });
var resultSource = tSourceCtor.Invoke(new object[] { observer });
// instantiate hook
var tHandler = record.HookType;
var tParam = record.ParameterType;
if (tParam == null)
{
var ctor = tHandler.GetConstructor(new[] { typeof(Visual), tObserver });
if (ctor != null)
{
return((IWpfWindowHook)ctor.Invoke(new object[] { rootVisual, resultSource }));
}
}
else
{
var ctor = tHandler.GetConstructor(new[] { typeof(Visual), tObserver, tParam });
if (ctor != null)
{
return((IWpfWindowHook)ctor.Invoke(new object[] { rootVisual, resultSource, record.Parameter }));
}
}
throw new NotSupportedException($"No suitable constructor found. Should be .ctor(System.Windows.Media.Visual, {tObserver.FullName}, {tParam.FullName})");
}
public IWpfWindowHook RegisterWpfHook(WpfHookRegistrationRecord hook, IDcsMarshalledObserver observer)
{
return(WpfHookManager.Hook(hook, observer));
}