NSOutlineView.Notifications.ObserveItemWillExpand Method
Definition
Important
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Overloads
| Name | Description |
|---|---|
| ObserveItemWillExpand(EventHandler<NSOutlineViewItemEventArgs>) |
Strongly typed notification for the ItemWillExpandNotification constant. |
| ObserveItemWillExpand(NSObject, EventHandler<NSOutlineViewItemEventArgs>) |
Strongly typed notification for the ItemWillExpandNotification constant. |
ObserveItemWillExpand(EventHandler<NSOutlineViewItemEventArgs>)
Strongly typed notification for the ItemWillExpandNotification constant.
public static Foundation.NSObject ObserveItemWillExpand(EventHandler<AppKit.NSOutlineViewItemEventArgs> handler);static member ObserveItemWillExpand : EventHandler<AppKit.NSOutlineViewItemEventArgs> -> Foundation.NSObjectParameters
- handler
- EventHandler<NSOutlineViewItemEventArgs>
The handler that responds to the notification when it occurs.
Returns
Token object that can be used to stop receiving notifications by either disposing it or passing it to RemoveObservers(IEnumerable<NSObject>).
Remarks
This method can be used to subscribe to ItemWillExpandNotification notifications.
// Listen to all notifications posted for any object
var token = NSOutlineView.Notifications.ObserveItemWillExpand ((notification) => {
Console.WriteLine ("Observed ItemWillExpandNotification!");
};
// Stop listening for notifications
token.Dispose ();
Applies to
ObserveItemWillExpand(NSObject, EventHandler<NSOutlineViewItemEventArgs>)
Strongly typed notification for the ItemWillExpandNotification constant.
public static Foundation.NSObject ObserveItemWillExpand(Foundation.NSObject objectToObserve, EventHandler<AppKit.NSOutlineViewItemEventArgs> handler);static member ObserveItemWillExpand : Foundation.NSObject * EventHandler<AppKit.NSOutlineViewItemEventArgs> -> Foundation.NSObjectParameters
- objectToObserve
- NSObject
The specific object to observe.
- handler
- EventHandler<NSOutlineViewItemEventArgs>
The handler that responds to the notification when it occurs.
Returns
Token object that can be used to stop receiving notifications by either disposing it or passing it to RemoveObservers(IEnumerable<NSObject>).
Remarks
This method can be used to subscribe to ItemWillExpandNotification notifications.
// Listen to all notifications posted for a single object
var token = NSOutlineView.Notifications.ObserveItemWillExpand (objectToObserve, (notification) => {
Console.WriteLine ($"Observed ItemWillExpandNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();