更改工具提示时触发事件

Question

I am trying to add routed event to existed tooltip in control - now it is bound to simple get/set property.

binding in xaml:

 <Style x:Key="Style" TargetType="{x:Type myControl}">
      <Setter Property="ToolTip" Value="{Binding Name}" />

prop in myControl:

 public string Name
    {
      get;
      set;
    }

routed event in Control Class that contains list of myControls (I suppose I have wrote it in the right way)

public static readonly RoutedEvent TooltipChangedEvent = EventManager.RegisterRoutedEvent("ToolTipChanged", RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler<string>), typeof(Control));
    public event RoutedPropertyChangedEventHandler<string> ToolTipChanged
    {
        add
        {
            AddHandler(TooltipChangedEvent, value);
        }
        remove
        {
            RemoveHandler(TooltipChangedEvent, value);
        }
    }

the question is how to fire this event when tooltip is changed?

Answer 1

class MainViewModel : FrameworkElement, INotifyPropertyChanged
{
    private string _name;

    public string Name
    {
        get { return _name; }
        set
        {
            _name = value;
            RaiseEvent(new RoutedEventArgs(TooltipChangedEvent));
            OnPropertyChanged();
        }
    }

    public static readonly RoutedEvent TooltipChangedEvent = EventManager.RegisterRoutedEvent("ToolTipChanged", RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler<string>), typeof(Control));
    public event RoutedPropertyChangedEventHandler<string> ToolTipChanged
    {
        add
        {
            AddHandler(TooltipChangedEvent, value);
        }
        remove
        {
            RemoveHandler(TooltipChangedEvent, value);
        }
    }

    public void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }

    public event PropertyChangedEventHandler PropertyChanged;
}