NSOutlineView.Notifications.ObserveItemWillCollapse Method
Definition
Important
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Overloads
| Name | Description |
|---|---|
| ObserveItemWillCollapse(EventHandler<NSOutlineViewItemEventArgs>) |
Strongly typed notification for the ItemWillCollapseNotification constant. |
| ObserveItemWillCollapse(NSObject, EventHandler<NSOutlineViewItemEventArgs>) |
Strongly typed notification for the ItemWillCollapseNotification constant. |
ObserveItemWillCollapse(EventHandler<NSOutlineViewItemEventArgs>)
Strongly typed notification for the ItemWillCollapseNotification constant.
public static Foundation.NSObject ObserveItemWillCollapse(EventHandler<AppKit.NSOutlineViewItemEventArgs> handler);static member ObserveItemWillCollapse : 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 ItemWillCollapseNotification notifications.
// Listen to all notifications posted for any object
var token = NSOutlineView.Notifications.ObserveItemWillCollapse ((notification) => {
Console.WriteLine ("Observed ItemWillCollapseNotification!");
};
// Stop listening for notifications
token.Dispose ();
Applies to
ObserveItemWillCollapse(NSObject, EventHandler<NSOutlineViewItemEventArgs>)
Strongly typed notification for the ItemWillCollapseNotification constant.
public static Foundation.NSObject ObserveItemWillCollapse(Foundation.NSObject objectToObserve, EventHandler<AppKit.NSOutlineViewItemEventArgs> handler);static member ObserveItemWillCollapse : 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 ItemWillCollapseNotification notifications.
// Listen to all notifications posted for a single object
var token = NSOutlineView.Notifications.ObserveItemWillCollapse (objectToObserve, (notification) => {
Console.WriteLine ($"Observed ItemWillCollapseNotification for {nameof (objectToObserve)}!");
};
// Stop listening for notifications
token.Dispose ();