Exemple #1
0
        /// <summary>
        /// Creates a new <see cref="DerivedNotifyProperty&lt;TValue&gt;"/>.  When any of the specified properties change in the owner object, this property's value will be re-calculated the next time it is requested
        /// </summary>
        /// <param name="owner">Object that contains this property and the ones from which it is derived</param>
        /// <param name="derivedPropertyName">Name of this property in the owner</param>
        /// <param name="getDerivedPropertyValue">Function to determine the current value of this property</param>
        /// <param name="propertiesDependedOn">Properties that this value depends on.  When any of these properties change, this property's value will be re-calculated the next time it is requested.
        /// These properties must therefore be in the same owner object as this one.</param>
        public DerivedNotifyProperty(IRaisePropertyChanged owner, string derivedPropertyName, Func <TValue> getDerivedPropertyValue, params string[] propertiesDependedOn)
            : this(owner, derivedPropertyName, getDerivedPropertyValue)
        {
            this.m_owner.PropertyChanged += m_owner_PropertyChanged;

            if (propertiesDependedOn == null)
            {
                throw new ArgumentNullException(ObjectNamingExtensions.GetName(() => propertiesDependedOn));
            }
            this.m_dependentValuesToListenFor = propertiesDependedOn.ToDictionary(property => property, property => true);
        }
Exemple #2
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        /// <summary>
        /// Creates a notify property with the given owner and name
        /// </summary>
        /// <param name="owner">Object that contains this property, on which <see cref="INotifyPropertyChanged.PropertyChanged"/> events will be raised</param>
        /// <param name="name">Name of the property within its owner</param>
        /// <param name="initialValue">Initial value of the property</param>
        /// <param name="itemChangedComparer">Comparer that will be used to determine if the value has changed</param>
        public NotifyProperty(IRaisePropertyChanged owner, string name, T initialValue, IEqualityComparer <T> itemChangedComparer)
            : this(owner, name)
        {
            if (itemChangedComparer == null)
            {
                throw new ArgumentNullException(ObjectNamingExtensions.GetName(() => itemChangedComparer));
            }
            this.m_itemChangedComparer = itemChangedComparer;

            this.m_value = initialValue;
        }
Exemple #3
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        /// <summary>
        /// Creates a new <see cref="DerivedNotifyProperty&lt;TValue&gt;"/>.  When any of the specified properties change, this property's value will be re-calculated the next time it is requested
        /// </summary>
        /// <param name="owner">Object that contains this property</param>
        /// <param name="derivedPropertyName">Name of this property in the owner</param>
        /// <param name="getDerivedPropertyValue">Function to determine the current value of this property</param>
        /// <param name="valueChangesToListenFor">Properties that this value depends on.  When any of these properties change, this property's value will be re-calculated the next time it is requested.</param>
        public DerivedNotifyProperty(IRaisePropertyChanged owner, string derivedPropertyName, Func <TValue> getDerivedPropertyValue, params INotifyValueChanged[] valueChangesToListenFor)
            : this(owner, derivedPropertyName, getDerivedPropertyValue)
        {
            if (valueChangesToListenFor == null)
            {
                throw new ArgumentNullException(ObjectNamingExtensions.GetName(() => valueChangesToListenFor));
            }

            foreach (INotifyValueChanged valueChangeToListenFor in valueChangesToListenFor)
            {
                valueChangeToListenFor.ValueChanged += TriggerValueChanged;
            }
        }
Exemple #4
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        /// <summary>
        /// Creates a notify property with the given owner and name
        /// </summary>
        /// <param name="owner">Object that contains this property, on which <see cref="INotifyPropertyChanged.PropertyChanged"/> events will be raised</param>
        /// <param name="name">Name of the property within its owner</param>
        public NotifyProperty(IRaisePropertyChanged owner, string name)
        {
            if (owner == null)
            {
                throw new NotSupportedException("Null owners (e.g. static properties) are not supported");
            }
            if (string.IsNullOrEmpty(name))
            {
                throw new ArgumentException("No property name was specified", ObjectNamingExtensions.GetName(() => name));
            }

            this.m_owner = owner;
            this.m_name  = name;
            this.m_itemChangedComparer = EqualityComparer <T> .Default; //will be overwritten by other constructors if necessary
        }
Exemple #5
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        private DerivedNotifyProperty(IRaisePropertyChanged owner, string derivedPropertyName, Func <TValue> getDerivedPropertyValue)
        {
            if (owner == null)
            {
                throw new ArgumentNullException(ObjectNamingExtensions.GetName(() => owner));
            }
            this.m_owner = owner;

            if (string.IsNullOrEmpty(derivedPropertyName))
            {
                throw new ArgumentNullException(ObjectNamingExtensions.GetName(() => derivedPropertyName));
            }
            this.m_derivedPropertyName = derivedPropertyName;

            if (getDerivedPropertyValue == null)
            {
                throw new ArgumentNullException(ObjectNamingExtensions.GetName(() => getDerivedPropertyValue));
            }
            this.m_getValueProperty = getDerivedPropertyValue;
            this.m_value            = new Lazy <TValue>(m_getValueProperty);
        }