Set Window Resizable

Question

In IB this can be done easily by checking the 'Resize' checkbox on or off. My problem is I want my main NSWindow to not be resizable, until a button is clicked, and then i want it to be resizable.

I've scoured the Internet but can't find anything? Can a window not be made to be resizable or not programmatically?

Thanks in advance everyone!

Answer 1

Since 10.6, you can change the style mask of a window using -[NSWindow setStyleMask:]. So, you'd do something like this:

In Objective-C

To make it resizable:

window.styleMask |= NSWindowStyleMaskResizable;

To make it non-resizable:

window.styleMask &= ~NSWindowStyleMaskResizable;

In Swift

To make it resizable:

mainWindow.styleMask = mainWindow.styleMask | NSWindowStyleMaskResizable

To make it non-resizable:

mainWindow.styleMask = mainWindow.styleMask & ~NSWindowStyleMaskResizable

Answer 2

The Swift 3 solution to this issue is to use the OptionSet class described at:

https://developer.apple.com/reference/swift/optionset

In short:

To replace the set of flags, you now do something like:

myWindow.styleMask = [ .resizable, .titled, .closable ]

To add a flag, do something like:

myWindow.styleMask.insert( [ .miniaturizable, .fullscreen ] )

To remove a flag, something like:

myWindow.styleMask.remove( [ .resizable ] )

Answer 3

In Swift 3,

if enabled {
  window.styleMask.update(with: .resizable)
} else {
  window.styleMask.remove(.resizable)
}

Answer 4

You can't change the style mask of a window after creating it, but you can set the window's minimum and maximum frame size to the same size. Do that after you and your resizable window awake from nib, and then change the maximum and optionally the minimum size back when the user clicks the button.