Protocol

NSValidatedUserInterfaceItem

A protocol that a custom class can adopt to manage the automatic enablement of a UI control.

Declaration

@protocol NSValidatedUserInterfaceItem

Overview

The NSValidatedUserInterfaceItem protocol works with the NSUserInterfaceValidations protocol to enable or disable a control automatically, depending on whether any responder in the responder chain can handle the control’s action method. The NSMenuItem and NSToolbarItem classes implement this protocol.

By conforming to this protocol, your control can participate in this validation mechanism. To validate a control, the application calls validateUserInterfaceItem: for each item in the responder chain, starting with the first responder. If no responder returns YES, the item is disabled. For example, a menu item that sends the copy: action message would disable itself if no responder in the responder chain can be copied.

Topics

Getting information about a user interface item

action

Returns the selector of the receiver’s action method.

Required.

tag

Returns the receiver’s tag integer.

Required.

Relationships

Conforming Types

See Also

UI Validation

NSUserInterfaceValidations

A protocol that a custom class can adopt to manage the enabled state of a UI element.