How to Constrain Second Nsviewcontroller Minimum Size in Os X App

How to constrain second NSViewController minimum size in OS X app?

The simplest way to do this would be:

class SecondViewController: NSViewController, NSWindowDelegate {

override func viewWillAppear() {
    super.viewWillAppear()
    self.view.window?.delegate = self
    self.view.window?.minSize = NSSize(width: 100, height: 100)
    }

}

override func viewDidAppear() {
    super.viewDidAppear()
    var frame = self.view.window!.frame
    var initialSize = NSSize(width: 100, height: 100)
    frame.size = initialSize
    self.view.window?.setFrame(frame, display: true)
}

Although if you were looking for a manual approach then the following would work aswell.

class SecondViewController: NSViewController, NSWindowDelegate {

override func viewWillAppear() {
    super.viewWillAppear()
    self.view.window?.delegate = self
    // Set the initial size
    var frame = self.view.window?.frame
    var initialSize = NSSize(width: 100, height: 100)
    frame.size = initialSize
    self.view.window?.setFrame(frame, display: true)
}

func windowWillResize(_ sender: NSWindow, to frameSize: NSSize) -> NSSize {
    let minimumSize = NSSize(width: 100, height: 100)
    var newSize = NSSize()
    if(frameSize.width < minimumSize.width) {
        newSize.width = minimumSize.width
    } else {
        newSize.width = frameSize.width
    }
    if(frameSize.height < minimumSize.height) {
        newSize.height = minimumSize.height
    } else {
        newSize.height = frameSize.height
    }
    return newSize
}

}

Further reading:

Resize windows event

NSWindow minSize

Resizing the window

Changing OSX app window size based on user input that changes views

I am answering my own question here - still unable to bind IBOutlet with NSWindow. Anyone with better solutions, please let me know.

Below is a capture of my Main.storyboard. All of the coding is done in the class junkViewController2 that is associated with the 1st view controller.

Here is the code for junkViewController2. I know, it could be more concise ...

//
//  JunkViewController2.swift
//  Scratch1
//

import Cocoa

class JunkViewController2: NSViewController {

    var junkSplitViewController: JunkSplitViewController!
    var myWindow: NSWindow!
    var dy: CGFloat!

    @IBOutlet weak var mySlider: NSSlider!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        dy = 0.0
    }

    @IBAction func mySlider(sender: NSSlider) {

        let junkSplitViewController = self.childViewControllers[0]
        dy = 0.0
        for controller in junkSplitViewController.childViewControllers {
            if controller.title == "smallGroup1" {
                if mySlider.intValue > 0 {
                    if controller.view.hidden {
                        dy = dy + 30.0
                    }
                    controller.view.hidden = false
                } else {
                    if !controller.view.hidden {
                        dy = dy - 30.0
                    }
                    controller.view.hidden = true
                }
            }
            if controller.title == "smallGroup2" {
                if mySlider.intValue > 1 {
                    if controller.view.hidden {
                        dy = dy + 30.0
                    }
                    controller.view.hidden = false
                } else {
                    if !controller.view.hidden {
                        dy = dy - 30.0
                    }
                    controller.view.hidden = true
                }
            }
            if controller.title == "smallGroup3" {
                if mySlider.intValue > 2 {
                    if controller.view.hidden {
                        dy = dy + 30.0
                    }
                    controller.view.hidden = false
                } else {
                    if !controller.view.hidden {
                        dy = dy - 30.0
                    }
                    controller.view.hidden = true
                }
            }
        }
        resize()
    }

    func resize() {
        var windowFrame = NSApp.mainWindow!.frame
        let oldWidth = windowFrame.size.width
        let oldHeight = windowFrame.size.height
        let old_x = windowFrame.origin.x
        let old_y = windowFrame.origin.y
        let toAdd = CGFloat(dy)
        let newHeight = oldHeight + toAdd
        let new_y = old_y - toAdd
        windowFrame.size = NSMakeSize(oldWidth, newHeight)
        windowFrame.origin = NSMakePoint(old_x, new_y)
        NSApp.mainWindow!.setFrame(windowFrame, display: true)
    }

}

Simple displaying of second window: OS X & Swift

First make new file like:

After that, put these codes in your classes and that should do it.

class SecondWindowController: NSWindowController {

    convenience init() {
        self.init(windowNibName: "SecondWindowController")
    }
}

class ViewController: NSViewController {

    private var secondWindowController: SecondWindowController?

    @IBAction func showSecondWindow(sender: AnyObject) {
        if secondWindowController == nil {
            secondWindowController = SecondWindowController()
        }
        secondWindowController?.showWindow(self)
    }
}

Resizing NSWindow to match view controller size in storyboard

The auto layout answer is half of it. You need to set the preferredContentSize in your ViewController for each tab to the fitting size (if you wanted the tab to size to the smallest size satisfying all constraints).

override func viewWillAppear() {
        super.viewWillAppear()
        preferredContentSize = view.fittingSize
}

If your constraints are causing an issue below try first with a fixed size, the example below sets this in the tab item's view controller's viewWillAppear function (Swift used here, but the Objective-C version works just as well).

override func viewWillAppear() {
        super.viewWillAppear()
        preferredContentSize = NSSize(width: 400, height: 280)
}

If that works, fiddle with your constraints to figure out what's going on

Resizing the window according to a variable swift

Let's say your window has an IBOutlet named "window", and your dynamic number is named "myDynamicNumber":

func resize() {
    var windowFrame = window.frame
    let oldWidth = windowFrame.size.width
    let oldHeight = windowFrame.size.height
    let toAdd = CGFloat(myDynamicNumber)
    let newWidth = oldWidth + toAdd
    let newHeight = oldHeight + toAdd
    windowFrame.size = NSMakeSize(newWidth, newHeight)
    window.setFrame(windowFrame, display: true)
}

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