/// <summary>
/// Registers a <see cref="PerspexProperty"/>.
/// </summary>
/// <typeparam name="TOwner">The type of the class that is registering the property.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="defaultValue">The default value of the property.</param>
/// <param name="inherits">Whether the property inherits its value.</param>
/// <param name="defaultBindingMode">The default binding mode for the property.</param>
/// <param name="validate">A validation function.</param>
/// <param name="notifying">
/// A method that gets called before and after the property starts being notified on an
/// object; the bool argument will be true before and false afterwards. This callback is
/// intended to support IsDataContextChanging.
/// </param>
/// <returns>A <see cref="PerspexProperty{TValue}"/></returns>
public static PerspexProperty <TValue> Register <TOwner, TValue>(
string name,
TValue defaultValue = default(TValue),
bool inherits = false,
BindingMode defaultBindingMode = BindingMode.OneWay,
Func <TOwner, TValue, TValue> validate = null,
Action <PerspexObject, bool> notifying = null)
where TOwner : PerspexObject
{
Contract.Requires <ArgumentNullException>(name != null);
PerspexProperty <TValue> result = new PerspexProperty <TValue>(
name,
typeof(TOwner),
defaultValue,
inherits,
defaultBindingMode,
Cast(validate),
notifying,
false);
PerspexObject.Register(typeof(TOwner), result);
return(result);
}
/// <summary>
/// Initialites a two-way bind between <see cref="PerspexProperty"/>s.
/// </summary>
/// <param name="property">The property on this object.</param>
/// <param name="source">The source object.</param>
/// <param name="sourceProperty">The property on the source object.</param>
/// <returns>
/// A disposable which can be used to terminate the binding.
/// </returns>
/// <remarks>
/// The binding is first carried out from <paramref name="source"/> to this. Two-way
/// bindings are always at the LocalValue priority.
/// </remarks>
public void BindTwoWay(
PerspexProperty property,
PerspexObject source,
PerspexProperty sourceProperty)
{
source.GetObservable(sourceProperty).Subscribe(x => this.SetValue(property, x));
this.GetObservable(property).Subscribe(x => source.SetValue(sourceProperty, x));
}
/// <summary>
/// Initialites a two-way bind between <see cref="PerspexProperty"/>s.
/// </summary>
/// <param name="property">The property on this object.</param>
/// <param name="source">The source object.</param>
/// <param name="sourceProperty">The property on the source object.</param>
/// <param name="priority">The priority of the binding.</param>
/// <returns>
/// A disposable which can be used to terminate the binding.
/// </returns>
/// <remarks>
/// The binding is first carried out from <paramref name="source"/> to this.
/// </remarks>
public IDisposable BindTwoWay(
PerspexProperty property,
PerspexObject source,
PerspexProperty sourceProperty,
BindingPriority priority = BindingPriority.LocalValue)
{
return(new CompositeDisposable(
Bind(property, source.GetObservable(sourceProperty)),
source.Bind(sourceProperty, GetObservable(property))));
}
/// <summary>
/// Registers the direct property on another type.
/// </summary>
/// <typeparam name="TOwner">The type of the additional owner.</typeparam>
/// <returns>The property.</returns>
public PerspexProperty <TValue> AddOwner <TOwner>(
Func <TOwner, TValue> getter,
Action <TOwner, TValue> setter = null)
where TOwner : PerspexObject
{
var result = new PerspexProperty <TValue>(this, CastReturn(getter), CastParam1(setter));
PerspexObject.Register(typeof(TOwner), result);
return(result);
}
/// <summary>
/// Registers the property on another type.
/// </summary>
/// <typeparam name="TOwner">The type of the additional owner.</typeparam>
/// <returns>The property.</returns>
public PerspexProperty <TValue> AddOwner <TOwner>() where TOwner : PerspexObject
{
if (IsDirect)
{
throw new InvalidOperationException(
"You must provide a new getter and setter when calling AddOwner on a direct PerspexProperty.");
}
PerspexObject.Register(typeof(TOwner), this);
return(this);
}
/// <summary>
/// Initializes a new instance of the <see cref="PriorityValue"/> class.
/// </summary>
/// <param name="owner">The owner of the object.</param>
/// <param name="name">The name of the property.</param>
/// <param name="valueType">The value type.</param>
/// <param name="validate">An optional validation function.</param>
public PriorityValue(
PerspexObject owner,
string name,
Type valueType,
Func <object, object> validate = null)
{
_owner = owner;
_name = name;
_valueType = valueType;
_value = PerspexProperty.UnsetValue;
ValuePriority = int.MaxValue;
_validate = validate;
}
/// <summary>
/// Initializes a new instance of the <see cref="PerspexPropertyChangedEventArgs"/> class.
/// </summary>
/// <param name="sender">The object that the property changed on.</param>
/// <param name="property">The property that changed.</param>
/// <param name="oldValue">The old value of the property.</param>
/// <param name="newValue">The new value of the property.</param>
/// <param name="priority">The priority of the binding that produced the value.</param>
public PerspexPropertyChangedEventArgs(
PerspexObject sender,
PerspexProperty property,
object oldValue,
object newValue,
BindingPriority priority)
{
Sender = sender;
Property = property;
OldValue = oldValue;
NewValue = newValue;
Priority = priority;
}
/// <summary>
/// Initiates a two-way binding between <see cref="PerspexProperty"/>s.
/// </summary>
/// <param name="property">The property on this object.</param>
/// <param name="source">The source object.</param>
/// <param name="sourceProperty">The property on the source object.</param>
/// <param name="priority">The priority of the binding.</param>
/// <returns>
/// A disposable which can be used to terminate the binding.
/// </returns>
/// <remarks>
/// The binding is first carried out from <paramref name="source"/> to this.
/// </remarks>
public IDisposable BindTwoWay(
PerspexProperty property,
PerspexObject source,
PerspexProperty sourceProperty,
BindingPriority priority = BindingPriority.LocalValue)
{
VerifyAccess();
_propertyLog.Verbose(
"Bound two way {Property} to {Binding} with priority {Priority}",
property,
source,
priority);
return(new CompositeDisposable(
Bind(property, source.GetObservable(sourceProperty)),
source.Bind(sourceProperty, GetObservable(property))));
}
/// <summary>
/// Registers a direct <see cref="PerspexProperty"/>.
/// </summary>
/// <typeparam name="TOwner">The type of the class that is registering the property.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="getter">Gets the current value of the property.</param>
/// <param name="setter">Sets the value of the property.</param>
/// <returns>A <see cref="PerspexProperty{TValue}"/></returns>
public static PerspexProperty <TValue> RegisterDirect <TOwner, TValue>(
string name,
Func <TOwner, TValue> getter,
Action <TOwner, TValue> setter = null)
where TOwner : PerspexObject
{
Contract.Requires <ArgumentNullException>(name != null);
PerspexProperty <TValue> result = new PerspexProperty <TValue>(
name,
typeof(TOwner),
Cast(getter),
Cast(setter));
PerspexObject.Register(typeof(TOwner), result);
return(result);
}
/// <summary>
/// Registers an attached <see cref="PerspexProperty"/>.
/// </summary>
/// <typeparam name="TOwner">The type of the class that is registering the property.</typeparam>
/// <typeparam name="THost">The type of the class that the property is to be registered on.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="defaultValue">The default value of the property.</param>
/// <param name="inherits">Whether the property inherits its value.</param>
/// <param name="defaultBindingMode">The default binding mode for the property.</param>
/// <returns>A <see cref="PerspexProperty{TValue}"/></returns>
public static PerspexProperty <TValue> RegisterAttached <TOwner, THost, TValue>(
string name,
TValue defaultValue = default(TValue),
bool inherits = false,
BindingMode defaultBindingMode = BindingMode.OneWay)
where TOwner : PerspexObject
{
Contract.Requires <NullReferenceException>(name != null);
PerspexProperty <TValue> result = new PerspexProperty <TValue>(
typeof(TOwner) + "." + name,
typeof(TOwner),
defaultValue,
inherits,
defaultBindingMode);
PerspexObject.Register(typeof(THost), result);
return(result);
}
/// <summary>
/// Registers an attached <see cref="PerspexProperty"/>.
/// </summary>
/// <typeparam name="TOwner">The type of the class that is registering the property.</typeparam>
/// <typeparam name="THost">The type of the class that the property is to be registered on.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="defaultValue">The default value of the property.</param>
/// <param name="inherits">Whether the property inherits its value.</param>
/// <param name="defaultBindingMode">The default binding mode for the property.</param>
/// <param name="validate">A validation function.</param>
/// <returns>A <see cref="PerspexProperty{TValue}"/></returns>
public static PerspexProperty <TValue> RegisterAttached <TOwner, THost, TValue>(
string name,
TValue defaultValue = default(TValue),
bool inherits = false,
BindingMode defaultBindingMode = BindingMode.OneWay,
Func <PerspexObject, TValue, TValue> validate = null)
{
Contract.Requires <ArgumentNullException>(name != null);
PerspexProperty <TValue> result = new PerspexProperty <TValue>(
name,
typeof(TOwner),
defaultValue,
inherits,
defaultBindingMode,
validate,
null,
true);
PerspexObject.Register(typeof(THost), result);
return(result);
}
/// <summary>
/// Gets all <see cref="PerspexProperty"/>s registered on a object.
/// </summary>
/// <param name="o">The object.</param>
/// <returns>A collection of <see cref="PerspexProperty"/> definitions.</returns>
public IEnumerable <PerspexProperty> GetRegistered(PerspexObject o)
{
Contract.Requires <ArgumentNullException>(o != null);
return(GetRegistered(o.GetType()));
}
/// <summary>
/// Finds a registered property on an object by name.
/// </summary>
/// <param name="o">The object.</param>
/// <param name="name">
/// The property name. If an attached property it should be in the form
/// "OwnerType.PropertyName".
/// </param>
/// <returns>
/// The registered property or null if no matching property found.
/// </returns>
public PerspexProperty FindRegistered(PerspexObject o, string name)
{
return(FindRegistered(o.GetType(), name));
}
/// <summary>
/// Registers the property on another type.
/// </summary>
/// <typeparam name="TOwner">The type of the additional owner.</typeparam>
/// <returns>The property.</returns>
public PerspexProperty <TValue> AddOwner <TOwner>()
{
PerspexObject.Register(typeof(TOwner), this);
return(this);
}
