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# acceptsFirstMouse(for:)

Returns a Boolean value indicating whether the receiver accepts the first mouse.

```
func acceptsFirstMouse(for event: NSEvent?) -> Bool
```

## Parameters

`event`

This parameter is ignored.

## Return Value

<doc://com.apple.documentation/documentation/Swift/false> if the selection mode of the receiver is `NSListModeMatrix`, <doc://com.apple.documentation/documentation/Swift/true> if the receiver is in any other selection mode. The receiver does not accept first mouse in `NSListModeMatrix` to prevent the loss of multiple selections.

## See Also

[`mode`](/documentation/AppKit/NSMatrix/mode-swift.property)

The selection mode of the receiver.


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