Called when the window is about to enter full-screen mode.
- macOS 10.9+
The window to enter full-screen mode.
The display screen on which the window will enter full-screen mode.
An array of windows to use for the animation to full-screen mode for
This method lets a window delegate customize the animation when the window is about to enter full-screen mode by providing a custom window or windows containing layers or other effects. If you don’t want to perform custom animation, you can omit the implementation of this method, or it can return
If this method and
custom are both implemented, this method is called.