Instance Method

panel(_:shouldEnable:)

For NSOpenPanel delegates, asks the delegate whether the specified URL should be enabled in the panel. This method is not called for NSSavePanel delegates; all URLs are always disabled.

Declaration

optional func panel(_ sender: Any, shouldEnable url: URL) -> Bool

Parameters

sender

The panel asking whether the URL should be enabled.

url

The URL to be checked.

Return Value

true to allow the URL to be enabled in the panel; otherwise, false.

Discussion

Implementations of this method should be fast to avoid stalling the user interface. Use panel(_:validate:) instead if processing will take a long time.

See Also

Running Panels

func panel(Any, validate: URL)

For NSSavePanel delegates, asks the delegate for file URL validation when the user chooses the Save button. For NSOpenPanel delegates, asks the delegate for file URL validation once for each selected filename (or directory) when the user chooses the Open button.

func panel(Any, didChangeToDirectoryURL: URL?)

Informs the delegate that the user changed the selected directory to the directory located at the specified URL. The URL may be nil if the current URL can’t be represented by an NSURL object.

func panel(Any, userEnteredFilename: String, confirmed: Bool) -> String?

Tells the delegate that the user confirmed a filename choice by clicking Save in a Save panel.

func panel(Any, willExpand: Bool)

Tells the delegate that the Save panel is about to expand or collapse because the user clicked the disclosure triangle that displays or hides the file browser.

func panelSelectionDidChange(Any?)

Tells the delegate that the user changed the selection in the specified Save panel.