NSOutlineView + columnId for NSTableView

.gitignore

@@ -67,3 +67,5 @@ Example/Pods
 
 # mac OS
 .DS_Store
+/Example/Podfile.lock
+/Example/RxRealmDataSources.xcworkspace/xcshareddata

Example/RxRealmDataSources.xcodeproj/xcshareddata/xcschemes/RxRealmDataSources_MacExample.xcscheme

@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1010"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "9C5B02CE1E1678C80009FBDE"
+               BuildableName = "RxRealmDataSources_MacExample.app"
+               BlueprintName = "RxRealmDataSources_MacExample"
+               ReferencedContainer = "container:RxRealmDataSources.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "9C5B02CE1E1678C80009FBDE"
+            BuildableName = "RxRealmDataSources_MacExample.app"
+            BlueprintName = "RxRealmDataSources_MacExample"
+            ReferencedContainer = "container:RxRealmDataSources.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "9C5B02CE1E1678C80009FBDE"
+            BuildableName = "RxRealmDataSources_MacExample.app"
+            BlueprintName = "RxRealmDataSources_MacExample"
+            ReferencedContainer = "container:RxRealmDataSources.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "9C5B02CE1E1678C80009FBDE"
+            BuildableName = "RxRealmDataSources_MacExample.app"
+            BlueprintName = "RxRealmDataSources_MacExample"
+            ReferencedContainer = "container:RxRealmDataSources.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Example/RxRealmDataSources/DataRandomizerTree.swift

@@ -0,0 +1,107 @@
+//
+//  DataRandomizerTree.swift
+//  RxRealmDataSources
+//
+//  Created by Sergiy Vynnychenko on 4/24/18.
+//  Copyright © 2018 CocoaPods. All rights reserved.
+//
+
+import Foundation
+import RealmSwift
+import RxSwift
+
+class DataRandomizerTree {
+
+    private let bag = DisposeBag()
+    private let rootItem = TreeItem()
+
+    lazy var config: Realm.Configuration = {
+        var config = Realm.Configuration.defaultConfiguration
+        config.inMemoryIdentifier = UUID().uuidString
+        return config
+    }()
+
+    private lazy var realm: Realm = {
+        let realm: Realm
+        do {
+            realm = try Realm(configuration: self.config)
+            return realm
+        }
+        catch let e {
+            print(e)
+            fatalError()
+        }
+    }()
+
+    init() {
+        try! realm.write {
+            rootItem.title = "1"
+            rootItem.time = 40
+            realm.add(rootItem)
+        }
+    }
+
+    private func insertChild() {
+        let items = realm.objects(TreeItem.self)
+        let index = items.count.random()
+        let parent = items[index]
+        let newItem = TreeItem()
+
+
+        try! realm.write {
+            newItem.title = "\(parent.title)+1"
+            newItem.time = parent.time * 3.14
+            newItem.parent = parent
+
+            realm.add(newItem)
+            print("tree item: added child for \(parent.title)]")
+        }
+    }
+
+    private func updateItem() {
+        let items = realm.objects(TreeItem.self)
+        let index = items.count.random()
+        let item = items[index]
+
+        try! realm.write {
+            print("tree item: going to update \(item.title)")
+            item.title += "+"
+        }
+    }
+
+    private func deleteItem() {
+        let items = realm.objects(TreeItem.self).filter("children.@count = 0")
+        if items.count > 0 {
+            let item = items[items.count.random()]
+
+            let parentTitle = item.parent?.title ?? "root item"
+            print("tree item: going to delete \(item.title) of parent \(parentTitle)")
+
+            try! realm.write {
+                realm.delete(item)
+            }
+        }
+    }
+
+    func start() {
+        // insert some laps
+        Observable<Int>.interval(1.0, scheduler: MainScheduler.instance)
+            .subscribe(onNext: {[weak self] _ in
+                self?.insertChild()
+            })
+            .disposed(by: bag)
+
+        Observable<Int>.interval(1.0, scheduler: MainScheduler.instance)
+            .subscribe(onNext: {[weak self] _ in
+                self?.updateItem()
+            })
+            .disposed(by: bag)
+
+        Observable<Int>.interval(2.0, scheduler: MainScheduler.instance)
+            .subscribe(onNext: {[weak self] _ in
+                self?.deleteItem()
+            })
+            .disposed(by: bag)
+    }
+}
+

Example/RxRealmDataSources/TreeItem.swift

@@ -0,0 +1,44 @@
+//
+//  TreeItem.swift
+//  RxRealmDataSources
+//
+//  Created by Sergiy Vynnychenko on 4/23/18.
+//  Copyright © 2018 CocoaPods. All rights reserved.
+//
+
+import Foundation
+import RealmSwift
+import RxRealmDataSources
+
+@objcMembers class TreeItem: Object, RxOutlineViewRealmDataItem {
+
+    override static func primaryKey() -> String? { return "key" }
+
+    dynamic var key             : String            = UUID().uuidString
+    dynamic var title           : String            = ""
+    dynamic var time            : Double            = 0
+    dynamic var children        = LinkingObjects(fromType: TreeItem.self, property: "parent")
+    dynamic var parent          : TreeItem?         { didSet { _indexInParent = (parent == nil) ? -1 : parent!.childrenCount } }
+    dynamic var _indexInParent  : Int               = -1
+
+    // RxOutlineViewRealmDataItem implementation
+    var isExpandable    : Bool  { return childrenCount > 0 }
+    var childrenCount   : Int   { return children.count }
+    var indexInParent   : Int   { return _indexInParent}
+
+    func childAt(idx: Int) -> RxOutlineViewRealmDataItem? {
+        guard idx >= 0 else { return nil }
+        guard idx < children.count else { return nil }
+
+        return children[idx]
+    }
+
+    func getParent() -> RxOutlineViewRealmDataItem? {
+        return parent
+    }
+
+    func getChildren() -> [RxOutlineViewRealmDataItem] {
+        return children.toArray()
+    }
+}
+