KCD/SuppliesView.swift

   1 //
   2 //  SuppliesView.swift
   3 //  KCD
   4 //
   5 //  Created by Hori,Masaki on 2017/01/02.
   6 //  Copyright © 2017年 Hori,Masaki. All rights reserved.
   7 //
   8
   9 import Cocoa
  10
  11 private var pShipStatusContext: Int = 0
  12
  13 final class SuppliesView: NSControl {
  14
  15     private let observeKeys = [ #keyPath(Ship.fuel),
  16                                 #keyPath(Ship.maxFuel),
  17                                 #keyPath(Ship.bull),
  18                                 #keyPath(Ship.maxBull)]
  19     private let suppliesCell: SuppliesCell
  20
  21     override init(frame: NSRect) {
  22
  23         suppliesCell = SuppliesCell()
  24
  25         super.init(frame: frame)
  26
  27         self.cell = suppliesCell
  28     }
  29
  30     required init?(coder: NSCoder) {
  31
  32         suppliesCell = SuppliesCell()
  33
  34         super.init(coder: coder)
  35
  36         self.cell = suppliesCell
  37     }
  38
  39     deinit {
  40
  41         observeKeys.forEach {
  42
  43             suppliesCell.shipStatus?.removeObserver(self, forKeyPath: $0)
  44         }
  45     }
  46
  47     @objc var shipStatus: Ship? {
  48
  49         get { return suppliesCell.shipStatus }
  50         set {
  51             observeKeys.forEach {
  52
  53                 suppliesCell.shipStatus?.removeObserver(self, forKeyPath: $0)
  54             }
  55             suppliesCell.shipStatus = newValue
  56             observeKeys.forEach {
  57
  58                 suppliesCell.shipStatus?.addObserver(self, forKeyPath: $0, context: &pShipStatusContext)
  59             }
  60             needsDisplay = true
  61         }
  62     }
  63
  64     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey: Any]?, context: UnsafeMutableRawPointer?) {
  65
  66         if context == &pShipStatusContext {
  67
  68             needsDisplay = true
  69
  70             return
  71         }
  72
  73         super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
  74     }
  75 }