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[kit] Implement the notification infrastructure

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This commit is contained in:
Eryn Wells 2017-08-16 21:12:00 -07:00
parent 0aa82ce59e
commit 587e616d76
3 changed files with 55 additions and 16 deletions
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42
MetaballsKit/Metaballs.swift
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@ -117,6 +117,7 @@ public class Field {
private(set) var balls = [Ball]()
public var defaults = UserDefaults.standard
private var parameters: Parameters
internal var bounds: CGRect {
@ -125,6 +126,11 @@ public class Field {
public init(parameters p: Parameters) {
parameters = p
NotificationCenter.default.addObserver(self, selector: #selector(Field.preferencesDidChange(note:)), name: PreferencesDidChange_Color, object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self, name: PreferencesDidChange_Color, object: nil)
}
public func update() {
@ -246,4 +252,40 @@ public class Field {
populateParametersBuffer()
populateBallBuffer()
}
// MARK: - Notifications
@objc
func preferencesDidChange(note: Notification) {
guard let userInfo = note.userInfo else { return }
var didChange = false
if let color = userInfo["color0"] as? NSColor {
let cf = Float4(color: color)
parameters.color0 = cf
defaults.color0 = cf
didChange = true
}
if let color = userInfo["color1"] as? NSColor {
let cf = Float4(color: color)
parameters.color1 = cf
defaults.color1 = cf
didChange = true
}
if let color = userInfo["color2"] as? NSColor {
let cf = Float4(color: color)
parameters.color2 = cf
defaults.color2 = cf
didChange = true
}
if let color = userInfo["color3"] as? NSColor {
let cf = Float4(color: color)
parameters.color3 = cf
defaults.color3 = cf
didChange = true
}
if didChange {
populateParametersBuffer()
}
}
}