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EagleOfToledo
EagleOfToledo

Reputation: 564

How to Detect NSWindow Maximize or Zoom Event?

How do you detect when a user clicks the green maximize or zoom (+) button on the NSWindow without using the NSWindowDidResizeNotification?

The reason I don't want to use NSWindowDidResizeNotification is because that is also triggered repeatedly as the user clicks and drags to manually resize the window. I have some code that I want to execute and it should only fire once when the user zooms or de-zooms the window using the green button in the top left-hand corner and not many times when manually resizing the window.

Upvotes: 5

Views: 3033

Answers (2)

Tyler Liu
Tyler Liu

Reputation: 20396

@EagleOfToledo, based on your question and your comments on Todd Yandell's answer, I think you only need this delegate method:

Swift

optional func windowDidEndLiveResize(_ notification: NSNotification)

Objective-C

- (void)windowDidEndLiveResize:(NSNotification *)notification

This method will only be invoked once no matter you click the zoom button or resize manually.

Upvotes: 0

Todd Yandell
Todd Yandell

Reputation: 14696

These two window delegate methods may be useful:

- windowWillUseStandardFrame:defaultFrame:
- windowShouldZoom:toFrame:

You might also consider subclassing NSWindow and overriding the zoom: method.

Upvotes: 11

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