/// <summary>
/// Handles the property changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="args">The <see cref="System.ComponentModel.PropertyChangedEventArgs"/> instance containing the event data.</param>
public void HandlePropertyChanged(object sender, PropertyChangedEventArgs args)
{
INotifyPropertyChanged target = sender as INotifyPropertyChanged;
if (target == null)
{
throw new NotSupportedException("WeakSource can only work on INotifyPropertyChanged");
}
string name = args.PropertyName;
if (!Actions.ContainsKey(name))
{
return;
}
if (IsAlive)
{
NotifyPropertyChanged(target, name);
}
else
{
target.PropertyChanged -= new PropertyChangedEventHandler(HandlePropertyChanged);
Targets.Remove(target.GetHashCode());
}
}
public void RemoveBindings(INotifyPropertyChanged dataSource)
{
if (dataSource != null)
{
string sKey = dataSource.GetHashCode().ToString();
List <string> keys = new List <string>();
foreach (KeyValuePair <string, List <DataBindingCtrlInfo> > kv in m_DTDataSource2ControlProperty)
{
if (kv.Key.StartsWith(sKey))
{
keys.Add(kv.Key);
}
}
if (keys.Count > 0)
{
foreach (string key in keys)
{
m_DTDataSource2ControlProperty.Remove(key);
}
}
if (m_RegisteredDataSource.Contains(dataSource))
{
dataSource.PropertyChanged -= new PropertyChangedEventHandler(dataSource_PropertyChanged);
m_RegisteredDataSource.Remove(dataSource);
}
}
}
/// <summary>
/// Registers the specified source.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <param name="action">The action.</param>
/// <param name="targetProp">The target prop.</param>
/// <param name="converter">The converter.</param>
/// <param name="parameter">The converter parameter.</param>
/// <returns></returns>
public static WeakSource Register(Object source, INotifyPropertyChanged target, Delegate action, string targetProp, IDataConverter converter = null, object parameter = null)
{
WeakSource wSource = _weakSources.ContainsKey(source.GetHashCode()) ? _weakSources[source.GetHashCode()] : null;
if (wSource == null)
{
wSource = new WeakSource(source);
_weakSources.Add(source.GetHashCode(), wSource);
}
IList <WeakAction> actions;
if (wSource.Actions.ContainsKey(targetProp))
{
actions = wSource.Actions[targetProp];
}
else
{
actions = new List <WeakAction>();
wSource.Actions.Add(targetProp, actions);
}
actions.Add(new WeakAction(action, converter, parameter));
IList <string> props;
if (!wSource.Targets.ContainsKey(target.GetHashCode()))
{
props = new List <string>();
props.Add(targetProp);
wSource.Targets.Add(target.GetHashCode(), props);
target.PropertyChanged += new PropertyChangedEventHandler(wSource.HandlePropertyChanged);
}
else
{
props = wSource.Targets[target.GetHashCode()];
if (!props.Contains(targetProp))
{
props.Add(targetProp);
}
}
return(wSource);
}
/// <summary>
/// Registers the specified source.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <param name="action">The action.</param>
/// <param name="targetProp">The target prop.</param>
/// <param name="converter">The converter.</param>
/// <param name="parameter">The converter parameter.</param>
/// <returns></returns>
public static WeakSource Register(Object source, INotifyPropertyChanged target, Delegate action, string targetProp, IDataConverter converter = null, object parameter = null)
{
WeakSource wSource = _weakSources.ContainsKey(source.GetHashCode()) ? _weakSources[source.GetHashCode()] : null;
if (wSource == null)
{
wSource = new WeakSource(source);
_weakSources.Add(source.GetHashCode(), wSource);
}
IList<WeakAction> actions;
if (wSource.Actions.ContainsKey(targetProp))
{
actions = wSource.Actions[targetProp];
}
else
{
actions = new List<WeakAction>();
wSource.Actions.Add(targetProp, actions);
}
actions.Add(new WeakAction(action, converter, parameter));
IList<string> props;
if (!wSource.Targets.ContainsKey(target.GetHashCode()))
{
props = new List<string>();
props.Add(targetProp);
wSource.Targets.Add(target.GetHashCode(), props);
target.PropertyChanged += new PropertyChangedEventHandler(wSource.HandlePropertyChanged);
}
else
{
props = wSource.Targets[target.GetHashCode()];
if (!props.Contains(targetProp))
{
props.Add(targetProp);
}
}
return wSource;
}
private string GetKey(INotifyPropertyChanged dataSource, string dataMember)
{
return(string.Format("{0}#{1}", dataSource.GetHashCode(), dataMember));
}
