91 lines
3.4 KiB
C#
91 lines
3.4 KiB
C#
namespace Caliburn.Micro.Core {
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using System;
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using System.ComponentModel;
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using System.Linq.Expressions;
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using System.Runtime.CompilerServices;
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using System.Runtime.Serialization;
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/// <summary>
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/// A base class that implements the infrastructure for property change notification and automatically performs UI thread marshalling.
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/// </summary>
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[DataContract]
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public class PropertyChangedBase : INotifyPropertyChangedEx {
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/// <summary>
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/// Creates an instance of <see cref = "PropertyChangedBase" />.
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/// </summary>
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public PropertyChangedBase() {
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IsNotifying = true;
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}
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/// <summary>
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/// Occurs when a property value changes.
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/// </summary>
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public virtual event PropertyChangedEventHandler PropertyChanged;
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/// <summary>
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/// Enables/Disables property change notification.
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/// Virtualized in order to help with document oriented view models.
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/// </summary>
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public virtual bool IsNotifying { get; set; }
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/// <summary>
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/// Raises a change notification indicating that all bindings should be refreshed.
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/// </summary>
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public virtual void Refresh() {
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NotifyOfPropertyChange(string.Empty);
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}
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/// <summary>
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/// Notifies subscribers of the property change.
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/// </summary>
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/// <param name = "propertyName">Name of the property.</param>
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#if NET || SILVERLIGHT
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public virtual void NotifyOfPropertyChange([CallerMemberName] string propertyName = null) {
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#else
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public virtual void NotifyOfPropertyChange([System.Runtime.CompilerServices.CallerMemberName] string propertyName = null) {
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#endif
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if (IsNotifying && PropertyChanged != null) {
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Execute.OnUIThread(() => OnPropertyChanged(new PropertyChangedEventArgs(propertyName)));
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}
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}
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/// <summary>
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/// Notifies subscribers of the property change.
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/// </summary>
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/// <typeparam name = "TProperty">The type of the property.</typeparam>
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/// <param name = "property">The property expression.</param>
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public void NotifyOfPropertyChange<TProperty>(Expression<Func<TProperty>> property) {
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NotifyOfPropertyChange(property.GetMemberInfo().Name);
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}
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/// <summary>
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/// Raises the <see cref="PropertyChanged" /> event directly.
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/// </summary>
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/// <param name="e">The <see cref="PropertyChangedEventArgs"/> instance containing the event data.</param>
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[EditorBrowsable(EditorBrowsableState.Never)]
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protected void OnPropertyChanged(PropertyChangedEventArgs e) {
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var handler = PropertyChanged;
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if (handler != null) {
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handler(this, e);
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}
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}
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/// <summary>
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/// Raises the property changed event immediately.
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/// </summary>
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/// <param name="propertyName">Name of the property.</param>
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public virtual void RaisePropertyChangedEventImmediately(string propertyName)
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{
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if (IsNotifying)
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RaisePropertyChangedEventCore(propertyName);
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}
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void RaisePropertyChangedEventCore(string propertyName)
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{
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var handler = PropertyChanged;
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if (handler != null)
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handler(this, new PropertyChangedEventArgs(propertyName));
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}
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}
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}
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