eqMac/native/app/Source/UI/Popover.swift

//
//  Popover.swift
//  eqMac
//
//  Created by Roman Kisil on 25/12/2018.
//  Copyright © 2018 Roman Kisil. All rights reserved.
//

import Foundation
import Cocoa

class Popover: NSObject, NSPopoverDelegate {
    let popover = NSPopover()
    var popoverTransiencyMonitor: Any?
    private var statusItem: StatusItem!
    
    var isShown: Bool {
        get {
            return popover.isShown
        }
        set {
            let show = newValue
            if (show) {
                self.show()
            } else {
                self.hide()
            }
        }
    }
    
    var isHidden: Bool {
        get {
            return !isShown
        }
        set {
            isShown = !newValue
        }
    }
    var height: Double {
        get {
            return Double(popover.contentSize.height)
        }
        set {
            let newHeight = CGFloat(newValue)
            let newSize = NSSize(width: CGFloat(width), height: newHeight)
            popover.contentSize = newSize
        }
    }
    
    var width: Double {
        get {
            return Double(popover.contentSize.width)
        }
        set {
            let newWidth = CGFloat(newValue)
            let newSize = NSSize(width: newWidth, height: CGFloat(height))
            popover.contentSize = newSize
        }
    }
    
    var canHide: Bool {
        get { return true }
        set {
          //
        }
    }
    
    init (_ statusItem: StatusItem, _ viewController: ViewController) {
        self.statusItem = statusItem
        popover.contentViewController = viewController
        popover.animates = true
        super.init()
        popover.behavior = .transient
        popover.delegate = self
    }
    
    // MARK: -  Public functions
    @objc open func toggle() {
        isShown ? hide() : show()
    }
    
    func show() {
        NSApp.activate(ignoringOtherApps: true)
        popover.show(relativeTo: NSZeroRect, of: statusItem.button, preferredEdge: .minY)
        popover.becomeFirstResponder()
    }
    
    func hide() {
        popover.resignFirstResponder()
        popover.close()
        statusItem.highlighted = false
    }
    
    func popoverShouldClose(_ popover: NSPopover) -> Bool {
        return !File.isPanelVisible
    }
}