private MultiPropertyChangedHandle(Binding[] sources, Action <MultiPropertyChangedCallbackArgs> callback, bool keepAlive)
{
if (sources == null)
{
throw new ArgumentNullException("sources");
}
if (sources.Length == 0)
{
throw new ArgumentException("Argument list 'sources' must not be empty.", "sources");
}
if (callback == null)
{
throw new ArgumentNullException("callback");
}
this.PropertyChangedHandles = new PropertyChangedHandle[sources.Length];
this.oldValues = new object[sources.Length];
this.callbackProviders = new CallbackProvider[sources.Length];
for (int i = 0; i < sources.Length; i++)
{
this.callbackProviders[i] = new CallbackProvider(this, i);
this.PropertyChangedHandles[i] = PropertyChangedHandle.GetDistinctInstance(sources[i], this.callbackProviders[i].OnPropertyChanged);
this.oldValues[i] = this.PropertyChangedHandles[i].PropertyValue;
}
this.Callback = callback;
this.KeepAlive = keepAlive;
}
/// <summary>
/// Initializes a new instance of the <see cref="BindingHandler"/> class.
/// </summary>
/// <param name="owner">The PropertyChangedHandle owner instance.</param>
public BindingHandler(PropertyChangedHandle owner)
{
this.owner = owner;
BindingOperations.SetBinding(this, PropertyProperty, owner.Binding);
this.initialized = true;
}
// TODO: (PS) Comment this.
public static bool Equals(object objA, object objB, bool includeCallback)
{
PropertyChangedHandle handleA = objA as PropertyChangedHandle;
PropertyChangedHandle handleB = objB as PropertyChangedHandle;
return((objA == null && objB == null) || (handleA != null && handleB != null && handleA.Equals(handleB, includeCallback)));
}
/// <summary>
/// Monitors a property and prints out any changes in the console using Debug.WriteLine(...).
/// </summary>
/// <param name="source">The source object that contains the property to monitor.</param>
/// <param name="path">The path to the property to monitor.</param>
/// <param name="announceMonitorBegin">if set to <c>true</c> an anouncement is made using Debug.WriteLine(...) when this method is called.</param>
/// <returns>
/// The PropertyChangedHandle that is used to monitor the specified property.
/// </returns>
public static PropertyChangedHandle MonitorProperty(object source, string path, bool announceMonitorBegin = true)
{
if (announceMonitorBegin)
{
Debug.WriteLine("Monitoring property path \"{0}\" of source \"{1}\".", path, source);
}
return(PropertyChangedHandle.GetDistinctInstance(source, path, PropertyChangeCallback, keepAlive: true));
}
// TODO: (PS) Comment this.
public bool Equals(object obj, bool includeCallback)
{
PropertyChangedHandle other = (PropertyChangedHandle)obj;
return(other != null &&
(object.ReferenceEquals(this, obj) ||
(BindingEquals(other.Binding, this.Binding) &&
(!includeCallback || object.Equals(other.Callback, this.Callback)) &&
this.KeepAlive == other.KeepAlive)));
}
/// <summary>
/// Determines whether the specified <see cref="System.Object"/> is equal to this instance.
/// </summary>
/// <param name="obj">The <see cref="System.Object"/> to compare with this instance.</param>
/// <returns>
/// <c>true</c> if the specified <see cref="System.Object"/> is equal to this instance; otherwise, <c>false</c>.
/// </returns>
public override bool Equals(object obj)
{
DumbBinding other = obj as DumbBinding;
return(other != null &&
((this.SourcePropertyChangedHandle != null &&
PropertyChangedHandle.Equals(this.SourcePropertyChangedHandle, other.SourcePropertyChangedHandle, false)) ||
(this.SourceMultiPropertyChangedHandle != null &&
MultiPropertyChangedHandle.Equals(this.SourceMultiPropertyChangedHandle, other.SourceMultiPropertyChangedHandle, false))) &&
object.Equals(this.Target, other.Target));
}
// TODO: (PS) Comment this.
public static PropertyChangedHandle MonitorProperty(Binding binding, bool announceMonitorBegin = true)
{
if (binding == null)
{
throw new ArgumentNullException("binding");
}
if (announceMonitorBegin)
{
Debug.WriteLine("Monitoring property path \"{0}\" of source \"{1}\".", binding.Path, binding.Source);
}
return(PropertyChangedHandle.GetDistinctInstance(binding, PropertyChangeCallback, keepAlive: true));
}
private static bool DoesBindingRead(BindingBase binding)
{
Binding bindingAsBinding;
MultiBinding bindingAsMultiBinding;
if ((bindingAsBinding = binding as Binding) != null)
{
return(PropertyChangedHandle.DoesBindingRead(bindingAsBinding));
}
else if ((bindingAsMultiBinding = binding as MultiBinding) != null)
{
return(bindingAsMultiBinding.Mode == BindingMode.Default || bindingAsMultiBinding.Mode == BindingMode.OneWay || bindingAsMultiBinding.Mode == BindingMode.TwoWay);
}
throw new NotSupportedException(String.Format("Binding type {0} not supported.", binding.GetType()));
}
private UniversalEventHandle(Binding binding, UniversalEventCallback callback)
{
if (binding == null)
{
throw new ArgumentNullException("binding");
}
if (callback == null)
{
throw new ArgumentNullException("callback");
}
this.UniversalEventType = UniversalEventType.PropertyChange;
this.PropertyChangedHandle = PropertyChangedHandle.GetDistinctInstance(binding, this.OnPropertyChanged);
this.Callback = callback;
this.hashCode = HashCodeOperations.Combine(this.PropertyChangedHandle, callback);
}
private DumbBinding(BindingBase bindingToSource, DumbBindingTarget target)
{
if (bindingToSource == null)
{
throw new ArgumentNullException("bindingToSource");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
this.BindingToSource = bindingToSource;
this.Target = target;
target.PropertyChangedCallback = this.OnTargetPropertyChanged;
BindingMode? bindingMode = null;
Binding bindingToSourceAsBinding;
MultiBinding bindingToSourceAsMultiBinding;
if ((bindingToSourceAsBinding = bindingToSource as Binding) != null)
{
bindingMode = bindingToSourceAsBinding.Mode;
this.SourcePropertyChangedHandle = PropertyChangedHandle.GetDistinctInstance(bindingToSourceAsBinding, this.OnSourceValueChanged);
this.UpdateTarget(this.SourcePropertyChangedHandle.PropertyValue, false);
}
else if ((bindingToSourceAsMultiBinding = bindingToSource as MultiBinding) != null)
{
bindingMode = bindingToSourceAsMultiBinding.Mode;
this.SourceMultiPropertyChangedHandle = MultiPropertyChangedHandle.GetDistinctInstance(bindingToSourceAsMultiBinding.Bindings.Cast <Binding>().ToArray(),
this.OnSourceValuesChanged);
this.UpdateTarget(this.MultiConvert(this.GetSourceValues()), false);
}
else
{
throw new NotSupportedException(String.Format("Binding type {0} not supported.", bindingToSource.GetType()));
}
if (bindingMode == BindingMode.OneWayToSource)
{
this.UpdateSource();
}
}
// TODO: (PS) Comment this.
/// <summary>
/// Initializes a new instance of the <see cref="CollectionObservationHandle"/> class.
/// </summary>
/// <param name="source">The source object that contains the property to monitor.</param>
/// <param name="path">The path from the source object to the property to monitor.</param>
/// <param name="callback">The callback method that is supposed to be called when changes happen in the property.</param>
private CollectionObservationHandle(Binding binding, Action <CollectionObservationCallbackArgs> callback, bool keepAlive)
{
this.PropertyChangedHandle = PropertyChangedHandle.GetDistinctInstance(binding, this.OnMonitoredPropertyChanged, keepAlive);
this.UpdateCollectionChangedEventHandler(null, this.PropertyChangedHandle.PropertyValue as INotifyCollectionChanged);
this.Callback = callback;
}
public bool Equals(object obj, bool includeCallback)
{
MultiPropertyChangedHandle other = obj as MultiPropertyChangedHandle;
return(other != null && (object.ReferenceEquals(this, obj) ||
(this.PropertyChangedHandles.EqualsElementwise(other.PropertyChangedHandles, (x, y) => PropertyChangedHandle.Equals(x, y, false)) &&
(!includeCallback || this.Callback.Equals(other.Callback)))));
}
/// <summary>
/// Initializes a new instance of the <see cref="PropertyChangedCallbackArgs"/> class.
/// </summary>
/// <param name="handle">The PropertyChangedHandle instance that executes the callback.</param>
/// <param name="oldValue">The old value of the property that is being watched.</param>
/// <param name="newValue">The new value of the property that is being watched.</param>
public PropertyChangedCallbackArgs(PropertyChangedHandle handle, object oldValue, object newValue)
{
this.Handle = handle;
this.OldValue = oldValue;
this.NewValue = newValue;
}