object GetValueCore(object o)
{
object value;
if (info == null)
{
value = o;
}
else
{
using (info.SetContext(o))
{
value = info.GetValue();
}
}
// comparers can deal with null, but not with UnsetValue or null-variants
if (value == DependencyProperty.UnsetValue ||
System.Windows.Data.BindingExpressionBase.IsNullValue(value))
{
value = null;
}
return(value);
}
internal static IObservable <EventPattern <PropertyChangedAndValueEventArgs <TProperty> > > ObservePropertyChangedWithValue <TNotifier, TProperty>(
this TNotifier source,
PropertyPath <TNotifier, TProperty> propertyPath,
bool signalInitial = true) where TNotifier : INotifyPropertyChanged
{
var wr = new WeakReference(source);
var observable = source.ObservePropertyChanged(propertyPath, false);
return(Observable.Defer(
() =>
{
var withValues =
observable.Select(
x =>
new EventPattern <PropertyChangedAndValueEventArgs <TProperty> >(
x.Sender,
new PropertyChangedAndValueEventArgs <TProperty>(
x.EventArgs.PropertyName,
propertyPath.GetValue((TNotifier)wr.Target))));
if (signalInitial)
{
var valueAndSource = propertyPath.GetValueAndSender((TNotifier)wr.Target);
var current =
new EventPattern <PropertyChangedAndValueEventArgs <TProperty> >(
valueAndSource.Source,
new PropertyChangedAndValueEventArgs <TProperty>(
propertyPath.Last.PropertyInfo.Name,
valueAndSource.Value));
return Observable.Return(current).Concat(withValues);
}
return withValues;
}));
}
public static object GetValue(ComponentPath path, PropertyPath prop, bool resolveDataContext = true)
{
if (resolveDataContext && path.Component is DataContext)
return (path.Component as DataContext).GetValue(prop);
else
return prop.GetValue(path.Component, null);
}
public static object GetValue(ComponentPath path, PropertyPath prop, bool resolveDataContext = true)
{
if (resolveDataContext && path.Component is DataContext)
{
return((path.Component as DataContext).GetValue(prop));
}
else
{
return(prop.GetValue(path.Component, null));
}
}
public void ApplyVToVM()
{
//Debug.Log("Applying v to vm");
if (_vmProp == null || _vProp == null)
{
return;
}
if (_mode == BindingMode.OneWayToTarget)
{
return;
}
if (_target.Component == null)
{
return;
}
if (!enabled)
{
return;
}
var value = _vProp.GetValue(_target.Component, null);
if (_ci != null)
{
var currentCulture = CultureInfo.CurrentCulture;
value = _ci.ConvertBack(value, _vmType, null, currentCulture);
}
else if (value != null)
{
value = System.Convert.ChangeType(value, _vmType);
}
else
{
value = GetDefaultValue(_vmType);
}
if (value is IDelayedValue)
{
if (!(value as IDelayedValue).ValueOrSubscribe(SetVmValue, ref value))
{
return;
}
}
SetVmValue(value);
}
private void TestAddressPath(PropertyPath <Employee, string> path)
{
Employee person = new Employee {
FirstName = "Franz",
LastName = "Huber",
Address = new Address {
City = "NY"
}
};
Assert.AreEqual("NY", path.GetValue(person));
path.SetValue(person, "LA");
Assert.AreEqual("LA", person.Address.City);
}
public TValue GetValue(IBehaviorContext context)
{
var sourceObject = _sourceObjectPath.GetValue((TVM)context.VM);
return(_getter(sourceObject));
}
public TValue GetValue(IBehaviorContext vm)
{
return(_path.GetValue((TVM)vm.VM));
}
public TValue CreateValue(IBehaviorContext context)
{
var sourceObject = _sourceObjectPath.GetValue((TVM)context.VM);
return(_factoryMethod(context, (TVM)context.VM, sourceObject));
}
