public IObservable<IObservedChange<object, object>> GetNotificationForProperty(object sender, System.Linq.Expressions.Expression expression, bool beforeChanged = false)
{
Contract.Requires(sender != null && sender is DependencyObject);
var type = sender.GetType();
var propertyName = expression.GetMemberInfo().Name;
var depSender = sender as DependencyObject;
if (depSender == null)
{
this.Log().Warn("Tried to bind DP on a non-DependencyObject. Binding as POCO object",
type.FullName, propertyName);
var ret = new POCOObservableForProperty();
return ret.GetNotificationForProperty(sender, expression, beforeChanged);
}
if (beforeChanged == true) {
this.Log().Warn("Tried to bind DO {0}.{1}, but DPs can't do beforeChanged. Binding as POCO object",
type.FullName, propertyName);
var ret = new POCOObservableForProperty();
return ret.GetNotificationForProperty(sender, expression, beforeChanged);
}
var dpFetcher = getDependencyPropertyFetcher(type, propertyName);
if (dpFetcher == null) {
this.Log().Warn("Tried to bind DO {0}.{1}, but DP doesn't exist. Binding as POCO object",
type.FullName, propertyName);
var ret = new POCOObservableForProperty();
return ret.GetNotificationForProperty(sender, expression, beforeChanged);
}
#if WINDOWS_UWP
return Observable.Create<IObservedChange<object, object>>(subj => {
var handler = new DependencyPropertyChangedCallback((o, e) => {
subj.OnNext(new ObservedChange<object, object>(sender, expression));
});
var dependencyProperty = dpFetcher();
var token = depSender.RegisterPropertyChangedCallback(dependencyProperty, handler);
return Disposable.Create(() => depSender.UnregisterPropertyChangedCallback(dependencyProperty, token));
});
#else
var dpAndSubj = createAttachedProperty(type, propertyName);
return Observable.Create<IObservedChange<object, object>>(obs => {
BindingOperations.SetBinding(depSender, dpAndSubj.Item1,
new Binding() { Source = depSender, Path = new PropertyPath(propertyName) });
var disp = dpAndSubj.Item2
.Where(x => x == sender)
.Select(x => new ObservedChange<object, object>(x, expression))
.Subscribe(obs);
// ClearBinding calls ClearValue http://stackoverflow.com/questions/1639219/clear-binding-in-silverlight-remove-data-binding-from-setbinding
return new CompositeDisposable(Disposable.Create(() => depSender.ClearValue(dpAndSubj.Item1)), disp);
});
#endif
}
/// <inheritdoc/>
public IObservable <IObservedChange <object, object> > GetNotificationForProperty(object sender, System.Linq.Expressions.Expression expression, string propertyName, bool beforeChanged = false, bool suppressWarnings = false)
{
Contract.Requires(sender != null && sender is DependencyObject);
var type = sender.GetType();
var depSender = sender as DependencyObject;
if (depSender == null)
{
if (!suppressWarnings)
{
this.Log().Warn(
CultureInfo.InvariantCulture,
"Tried to bind DP on a non-DependencyObject. Binding as POCO object",
type.FullName,
propertyName);
}
var ret = new POCOObservableForProperty();
return(ret.GetNotificationForProperty(sender, expression, propertyName, beforeChanged));
}
if (beforeChanged == true)
{
this.Log().Warn(
CultureInfo.InvariantCulture,
"Tried to bind DO {0}.{1}, but DPs can't do beforeChanged. Binding as POCO object",
type.FullName,
propertyName);
var ret = new POCOObservableForProperty();
return(ret.GetNotificationForProperty(sender, expression, propertyName, beforeChanged));
}
var dpFetcher = GetDependencyPropertyFetcher(type, propertyName);
if (dpFetcher == null)
{
this.Log().Warn(
CultureInfo.InvariantCulture,
"Tried to bind DO {0}.{1}, but DP doesn't exist. Binding as POCO object",
type.FullName,
propertyName);
var ret = new POCOObservableForProperty();
return(ret.GetNotificationForProperty(sender, expression, propertyName, beforeChanged));
}
return(Observable.Create <IObservedChange <object, object> >(subj =>
{
var handler = new DependencyPropertyChangedCallback((o, e) =>
{
subj.OnNext(new ObservedChange <object, object>(sender, expression));
});
var dependencyProperty = dpFetcher();
var token = depSender.RegisterPropertyChangedCallback(dependencyProperty, handler);
return Disposable.Create(() => depSender.UnregisterPropertyChangedCallback(dependencyProperty, token));
}));
}
public IObservable <IObservedChange <object, object> > GetNotificationForProperty(object sender, System.Linq.Expressions.Expression expression, bool beforeChanged = false)
{
Contract.Requires(sender != null && sender is DependencyObject);
var type = sender.GetType();
var propertyName = expression.GetMemberInfo().Name;
if (beforeChanged == true)
{
this.Log().Warn("Tried to bind DO {0}.{1}, but DPs can't do beforeChanged. Binding as POCO object",
type.FullName, propertyName);
var ret = new POCOObservableForProperty();
return(ret.GetNotificationForProperty(sender, expression, beforeChanged));
}
var dpFetcher = getDependencyPropertyFetcher(type, propertyName);
if (dpFetcher == null)
{
this.Log().Warn("Tried to bind DO {0}.{1}, but DP doesn't exist. Binding as POCO object",
type.FullName, propertyName);
var ret = new POCOObservableForProperty();
return(ret.GetNotificationForProperty(sender, expression, beforeChanged));
}
var dpAndSubj = createAttachedProperty(type, propertyName);
return(Observable.Create <IObservedChange <object, object> >(obs => {
BindingOperations.SetBinding(sender as DependencyObject, dpAndSubj.Item1,
new Binding()
{
Source = sender as DependencyObject, Path = new PropertyPath(propertyName)
});
var disp = dpAndSubj.Item2
.Where(x => x == sender)
.Select(x => new ObservedChange <object, object>(x, expression))
.Subscribe(obs);
// ClearBinding calls ClearValue http://stackoverflow.com/questions/1639219/clear-binding-in-silverlight-remove-data-binding-from-setbinding
return new CompositeDisposable(Disposable.Create(() => (sender as DependencyObject).ClearValue(dpAndSubj.Item1)), disp);
}));
}