Gestures for Volume (2 fingers) and Brightness (3 fingers) on ScrollView

MTMR/ScrollViewItem.swift

@@ -1,6 +1,8 @@
 import Foundation
 
-class ScrollViewItem: NSCustomTouchBarItem {
+class ScrollViewItem: NSCustomTouchBarItem, NSGestureRecognizerDelegate {
+    var twofingersPrev: CGFloat = 0.0
+    var threefingersPrev: CGFloat = 0.0
     
     init(identifier: NSTouchBarItem.Identifier, items: [NSTouchBarItem]) {
         super.init(identifier: identifier)
@@ -11,10 +13,63 @@ class ScrollViewItem: NSCustomTouchBarItem {
         let scrollView = NSScrollView(frame: CGRect(origin: .zero, size: stackView.fittingSize))
         scrollView.documentView = stackView
         self.view = scrollView
+        
+        let twofingers = NSPanGestureRecognizer(target: self, action: #selector(twofingersHandler(_:)))
+        twofingers.allowedTouchTypes = .direct
+        twofingers.numberOfTouchesRequired = 2
+        self.view.addGestureRecognizer(twofingers)
+        
+        let threefingers = NSPanGestureRecognizer(target: self, action: #selector(threefingersHandler(_:)))
+        threefingers.allowedTouchTypes = .direct
+        threefingers.numberOfTouchesRequired = 3
+        self.view.addGestureRecognizer(threefingers)
     }
     
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
+    @objc func twofingersHandler(_ sender: NSGestureRecognizer?) { // Volume
+        let position = (sender?.location(in: sender?.view).x)!
+        
+        switch sender!.state {
+        case .began:
+            twofingersPrev = position
+        case .changed:
+            if (((position-twofingersPrev) > 10) || ((twofingersPrev-position) > 10)) {
+                if position > twofingersPrev {
+                    HIDPostAuxKey(NX_KEYTYPE_SOUND_UP)
+                } else if position < twofingersPrev {
+                    HIDPostAuxKey(NX_KEYTYPE_SOUND_DOWN)
+                }
+                twofingersPrev = position
+            }
+        case .ended:
+            twofingersPrev = 0.0
+        default:
+            break
+        }
+    }
+    
+    @objc func threefingersHandler(_ sender: NSGestureRecognizer?) { // Brightness
+        let position = (sender?.location(in: sender?.view).x)!
+        
+        switch sender!.state {
+        case .began:
+            threefingersPrev = position
+        case .changed:
+            if (((position-threefingersPrev) > 15) || ((threefingersPrev-position) > 15)) {
+                if position > threefingersPrev {
+                    GenericKeyPress(keyCode: CGKeyCode(144)).send()
+                } else if position < threefingersPrev {
+                    GenericKeyPress(keyCode: CGKeyCode(145)).send()
+                }
+                threefingersPrev = position
+            }
+        case .ended:
+            threefingersPrev = 0.0
+        default:
+            break
+        }
+    }
 }