add double click delegate & notification

Author: DivineDominion

FatSidebar/FatSidebar.swift

@@ -8,18 +8,15 @@ class FlippedView: NSView {
 
 public protocol FatSidebarDelegate: class {
     func sidebar(_ sidebar: FatSidebar, didMoveItemFrom oldIndex: Int, to newIndex: Int)
-}
-
-public protocol FatSidebarSelectionChangeDelegate: class {
     func sidebar(_ sidebar: FatSidebar, didChangeSelection selectionIndex: Int)
+    func sidebar(_ sidebar: FatSidebar, editItem index: Int)
 }
 
 
 /// Top-level module facade, acting as a composite view that scrolls.
 public class FatSidebar: NSView {
 
     public weak var delegate: FatSidebarDelegate?
-    public weak var selectionDelegate: FatSidebarSelectionChangeDelegate?
 
     let scrollView = NSScrollView()
     let sidebarView = FatSidebarView()
@@ -103,6 +100,7 @@ public class FatSidebar: NSView {
 
     private var selectionChangeObserver: AnyObject!
     private var moveObserver: AnyObject!
+    private var doubleClickObserver: AnyObject!
 
     fileprivate func observeSidebarSelectionChanges() {
 
@@ -117,13 +115,18 @@ public class FatSidebar: NSView {
             forName: FatSidebarView.didReorderItemNotification,
             object: sidebarView,
             queue: nil) { [weak self] in self?.itemDidMove($0) }
+
+        doubleClickObserver = notificationCenter.addObserver(
+            forName: FatSidebarView.didDoubleClickItemNotification,
+            object: sidebarView,
+            queue: nil) { [weak self] in self?.itemWasDoubleClicked($0) }
     }
 
     fileprivate func selectionDidChange(_ notification: Notification) {
 
         guard let index = notification.userInfo?["index"] as? Int else { return }
 
-        selectionDelegate?.sidebar(self, didChangeSelection: index)
+        delegate?.sidebar(self, didChangeSelection: index)
     }
 
     fileprivate func itemDidMove(_ notification: Notification) {
@@ -136,6 +139,16 @@ public class FatSidebar: NSView {
         self.delegate?.sidebar(self, didMoveItemFrom: fromIndex, to: toIndex)
     }
 
+    fileprivate func itemWasDoubleClicked(_ notification: Notification) {
+
+        guard let userInfo = notification.userInfo,
+            let index = userInfo["index"] as? Int
+            else { return }
+
+        self.delegate?.sidebar(self, editItem: index)
+    }
+    
+
     // MARK: - Sidebar Façade
 
     public var itemCount: Int {

FatSidebar/FatSidebarItem.swift

@@ -35,6 +35,7 @@ public class FatSidebarItem: NSView {
     public let style: Style
     public let callback: ((FatSidebarItem) -> Void)?
     public var selectionHandler: ((FatSidebarItem) -> Void)?
+    public var doubleClickHandler: ((FatSidebarItem) -> Void)?
     public var animated: Bool
 
     let label: NSTextField
@@ -328,6 +329,7 @@ public class FatSidebarItem: NSView {
 
     public override func mouseDown(with event: NSEvent) {
 
+
         isHighlighted = true
 
         let dragTimer = Timer.scheduledTimer(
@@ -367,6 +369,10 @@ public class FatSidebarItem: NSView {
             dragging = nil
         }
 
+        if event.clickCount == 2 {
+            doubleClickHandler?(self)
+        }
+
         guard let dragging = dragging,
             !dragging.isDragging
             else { return }
@@ -442,6 +448,10 @@ public class FatSidebarItem: NSView {
             overlay.isSelected = self.isSelected
             overlay.translatesAutoresizingMaskIntoConstraints = true
 
+            overlay.doubleClickHandler = { [weak self] _ in
+                guard let item = self else { return }
+                item.doubleClickHandler?(item)
+            }
             overlay.selectionHandler = { [weak self] _ in
                 guard let item = self else { return }
                 item.selectionHandler?(item)

FatSidebar/FatSidebarView.swift

@@ -18,8 +18,11 @@ public class FatSidebarView: NSView, DragViewContainer {
     static let didToggleItemNotification = Notification.Name("FatSidebarView_didToggleItemNotification")
     static let didSelectItemNotification = Notification.Name("FatSidebarView_didSelectItemNotification")
     static let didDeselectItemNotification = Notification.Name("FatSidebarView_didDeselectItemNotification")
+
     static let didReorderItemNotification = Notification.Name("FatSidebarView_didReorderItemNotification")
 
+    static let didDoubleClickItemNotification = Notification.Name("FatSidebarView_didDoubleClickItemNotification")
+
     public var theme: FatSidebarTheme = DefaultTheme() {
         didSet {
             applyThemeToItems()
@@ -80,6 +83,7 @@ public class FatSidebarView: NSView, DragViewContainer {
         let item = FatSidebarItem(configuration: configuration)
         item.menu = self.itemContextualMenu
         item.selectionHandler = { [unowned self] in self.itemSelected($0) }
+        item.doubleClickHandler = { [unowned self] in self.itemDoubleClicked($0) }
 
         return item
     }
@@ -166,6 +170,15 @@ public class FatSidebarView: NSView, DragViewContainer {
         }
     }
 
+    fileprivate func itemDoubleClicked(_ item: FatSidebarItem) {
+
+        guard let index = self.items.index(of: item) else { return }
+
+        NotificationCenter.default.post(
+            name: FatSidebarView.didDoubleClickItemNotification,
+            object: self,
+            userInfo: ["index" : index])
+    }
 
     // MARK: Removal