implement scrolling view at the center

MTMR.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		368EDDE720812A1D00E10953 /* ScrollViewItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 368EDDE620812A1D00E10953 /* ScrollViewItem.swift */; };
 		36C2ECD7207B6DAE003CDA33 /* TimeTouchBarItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 36C2ECD6207B6DAE003CDA33 /* TimeTouchBarItem.swift */; };
 		36C2ECD9207B74B4003CDA33 /* AppleScriptTouchBarItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 36C2ECD8207B74B4003CDA33 /* AppleScriptTouchBarItem.swift */; };
 		36C2ECDB207C3FE7003CDA33 /* ItemsParsing.swift in Sources */ = {isa = PBXBuildFile; fileRef = 36C2ECDA207C3FE7003CDA33 /* ItemsParsing.swift */; };
@@ -49,6 +50,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		368EDDE620812A1D00E10953 /* ScrollViewItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScrollViewItem.swift; sourceTree = "<group>"; };
 		36BDC22F207CDA8600FCFEBE /* TECHNICAL_DEBT.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = TECHNICAL_DEBT.md; sourceTree = "<group>"; };
 		36C2ECD2207B3B1D003CDA33 /* README.md */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = net.daringfireball.markdown; path = README.md; sourceTree = "<group>"; };
 		36C2ECD6207B6DAE003CDA33 /* TimeTouchBarItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimeTouchBarItem.swift; sourceTree = "<group>"; };
@@ -160,6 +162,7 @@
 				36C2ECDF207CB1B0003CDA33 /* defaultPreset.json */,
 				6027D1B72080E52A004FFDC7 /* BrightnessViewController.swift */,
 				6027D1B82080E52A004FFDC7 /* VolumeViewController.swift */,
+				368EDDE620812A1D00E10953 /* ScrollViewItem.swift */,
 			);
 			path = MTMR;
 			sourceTree = "<group>";
@@ -329,6 +332,7 @@
 				B0A7E9AA205D6AA400EEF070 /* KeyPress.swift in Sources */,
 				36C2ECD7207B6DAE003CDA33 /* TimeTouchBarItem.swift in Sources */,
 				6027D1B92080E52A004FFDC7 /* BrightnessViewController.swift in Sources */,
+				368EDDE720812A1D00E10953 /* ScrollViewItem.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

MTMR/ScrollViewItem.swift

@@ -0,0 +1,19 @@
+import Foundation
+
+class ScrollViewItem: NSCustomTouchBarItem {
+    
+    init(identifier: NSTouchBarItem.Identifier, items: [NSTouchBarItem]) {
+        super.init(identifier: identifier)
+        let views = items.flatMap { $0.view }
+        let stackView = NSStackView(views: views)
+        stackView.orientation = .horizontal
+        let scrollView = NSScrollView(frame: CGRect(origin: .zero, size: stackView.fittingSize))
+        scrollView.documentView = stackView
+        self.view = scrollView
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+}

MTMR/TouchBarController.swift

@@ -36,6 +36,7 @@ extension ItemType {
 
 extension NSTouchBarItem.Identifier {
     static let controlStripItem = NSTouchBarItem.Identifier("com.toxblh.mtmr.controlStrip")
+    static let centerScrollArea = NSTouchBarItem.Identifier("com.toxblh.mtmr.scrollArea")
 }
 
 class TouchBarController: NSObject, NSTouchBarDelegate {
@@ -46,9 +47,10 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
 
     var itemDefinitions: [NSTouchBarItem.Identifier: BarItemDefinition] = [:]
     var items: [NSTouchBarItem.Identifier: NSTouchBarItem] = [:]
-    var orderedIdentifiers: [NSTouchBarItem.Identifier] = []
+    var leftIdentifiers: [NSTouchBarItem.Identifier] = []
     var centerItems: [NSTouchBarItem] = []
-    
+    var rightIdentifiers: [NSTouchBarItem.Identifier] = []
+
     private override init() {
         super.init()
         SupportedTypesHolder.sharedInstance.register(typename: "exitTouchbar", item: .staticButton(title: "exit"), action: .custom(closure: { [weak self] in
@@ -57,12 +59,12 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
 
         loadItemDefinitions()
         createItems()
-        centerItems = self.orderedIdentifiers.flatMap { identifier -> NSTouchBarItem? in
+        centerItems = self.itemDefinitions.flatMap { (identifier, definition) -> NSTouchBarItem? in
-            return itemDefinitions[identifier]?.centerAligned == true ? items[identifier] : nil
+            return definition.align == .center ? items[identifier] : nil
         }
 
         touchBar.delegate = self
-        touchBar.defaultItemIdentifiers = self.orderedIdentifiers
+        touchBar.defaultItemIdentifiers = self.leftIdentifiers + [.centerScrollArea] + self.rightIdentifiers
         self.presentTouchBar()
     }
 
@@ -83,7 +85,12 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
                 ? NSTouchBarItem.Identifier.flexibleSpace
                 : NSTouchBarItem.Identifier(identifierString)
             itemDefinitions[identifier] = item
-            orderedIdentifiers.append(identifier)
+            if item.align == .left {
+                leftIdentifiers.append(identifier)
+            }
+            if item.align == .right {
+                rightIdentifiers.append(identifier)
+            }
         }
     }
     
@@ -114,9 +121,13 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
     }
 
     func touchBar(_ touchBar: NSTouchBar, makeItemForIdentifier identifier: NSTouchBarItem.Identifier) -> NSTouchBarItem? {
+        if identifier == .centerScrollArea {
+            return ScrollViewItem(identifier: identifier, items: centerItems)
+        }
+
         guard let item = self.items[identifier],
             let definition = self.itemDefinitions[identifier],
-            !definition.centerAligned else {
+            definition.align != .center else {
             return nil
         }
         return item
@@ -139,10 +150,6 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
             barItem = VolumeViewController(identifier: identifier)
         case .brightness:
             barItem = BrightnessViewController(identifier: identifier)
-//        case .scrollArea:
-//            for item in centerItems {
-//                //todo:add item.view to scrollview
-//            }
         }
         if case .width(let value)? = item.additionalParameters[.width], let widthBarItem = barItem as? CanSetWidth {
             widthBarItem.setWidth(value: value)
@@ -202,10 +209,10 @@ extension NSCustomTouchBarItem: CanSetWidth {
 }
 
 extension BarItemDefinition {
-    var centerAligned: Bool {
+    var align: Align {
         if case .align(let result)? = self.additionalParameters[.align] {
-            return result == .center
+            return result
         }
-        return true
+        return .center
     }
 }

README.md

@@ -25,7 +25,7 @@ My the idea is to create the program like a platform for plugins for customizati
 - [x] Status menu: "preferences", "quit"
 - [x] JSON or another approch for save preset, maybe in `~/Library/Application Support/MTMR/`
 - [x] Custom buttons size, actions by click
-- [ ] Layout: [always left, NSSliderView for center, always right]
+- [x] Layout: [always left, NSSliderView for center, always right]
 - [ ] Overwrite default values from item types (e.g. title for brightness)
 - [ ] System for autoupdate (maybe https://sparkle-project.org/)