Is there a way to force the NSPopover to start in the detached state? I only see
isDetached which is a read-only property for the state of the popover and an NSPopoverDelegate method
detachableWindow(forPopover:) which lets me override the window that gets created. I'd like to essentially click a button and have the NSPopover start in the state in this photo.
The style of this window is exactly what a product requirement is and I can't seem to find any NSWindow style settings that would make a window do something like this (nor an NSPanel)
This detached popover functionality seems special in that it:
Here is the trick.
Use the required delegate method
detachableWindowForPopover: to do the work for you, like:
- (void) showPopoverDetached
NSWindow* detachedWindow = [self detachableWindowForPopover:nil];
Seems that the Apple engineers implemented
detachableWindowForPopover: on a pretty smart way, I guess it uses the content view controller class, and will always create a singleton like instance of the detached window.
detachableWindowForPopover: has called the presented window instance will be re-used no matter when and why it is called, called it directly (from a func like my sample above) or indirectly (e.g. when you drag out, detach, the popover from its original position)
This way they can prevent a popover from being detached 'twice' and we can also implement the detached way programmatically, nice job from them!
Here is a tiny demo of how it works in a real life (tested on macOS 10.13 - 13.0)