inertial scroll for touchpad gesture

VoidLink/Input/CustomTapGestureRecognizer.m

@@ -90,7 +90,16 @@ static CGFloat screenWidthInPoints;
         _gestureCaptured = false; //reset for next recognition
         if((CACurrentMediaTime() - _gestureCapturedTime) < _tapDownTimeThreshold){
             // lowestTouchPointYCoord = 0.0; //reset for next recognition
-            self.state = UIGestureRecognizerStateRecognized;
+            
+            for(UITouch* touch in touches){
+                CGVector vector = [UITouchUtil vectorOf:touch in:self.view];
+                if(hypot(vector.dx, vector.dy)>2){
+                    self.state = UIGestureRecognizerStateFailed;
+                    break;
+                }
+            }
+            
+            if(self.state != UIGestureRecognizerStateFailed) self.state = UIGestureRecognizerStateRecognized;
             // NSLog(@"gen _lowestTouchPointHeight %f markmark touchesEnd", _lowestTouchPointHeight);
         }
     }

VoidLink/Input/RelativeTouchHandler.m

@@ -193,10 +193,12 @@ static const float QUICK_TAP_TIME_INTERVAL = 0.2;
     
     if(TouchPadGestureHandler.ctrlDown) LiSendKeyboardEvent(CommandManager.keyboardButtonMappings[@"CTRL"].shortValue,KEY_ACTION_UP,0);
     
+    [TouchPadGestureHandler startInertialScroll];
+    
     if(multiTouchesDetected){
         if([UITouchUtil touchesIn:streamView from:event].count == touches.count){
-            
-            multiTouchesDetected = false;}
+            multiTouchesDetected = false;
+        }
         return;
     }
     if([UITouchUtil touchesIn:streamView from:event].count == touches.count) multiTouchesDetected = false;

VoidLink/Input/TouchPadGestureHandler.swift

@@ -16,7 +16,21 @@ import UIKit
     @objc public static var enableHorizontalScroll:Bool = true
     @objc public static var scrollSensitivity:CGFloat = 1.0
     @objc public static var pinchSensitivity:CGFloat = 1.0
+    @objc public static var displayLinkRate:CGFloat = 60
+
+    private static var inertialScroller: InertialScroller = InertialScroller(decelerationRate: 0.915, displayLinkRate: displayLinkRate) {
+        if ctrlDown {return}
+        LiSendHighResScrollEvent(Int16(inertialScroller.vector.dy*7*scrollSensitivity))
+        if TouchPadGestureHandler.enableHorizontalScroll {LiSendHighResHScrollEvent(Int16(-inertialScroller.vector.dx*7*scrollSensitivity))}
+    }
+    
+    @objc public static func startInertialScroll(){
+        inertialScroller.timer?.restart()
+    }
+    
     @objc public static func handleGesture(in view: UIView, with event: UIEvent) {
+        inertialScroller.timer?.pause()
+        
         let currentTouches = UITouchUtil.touches(in: view, from: event)
         guard currentTouches.count == 2 else { return }
         
@@ -35,19 +49,22 @@ import UIKit
         let midPointDeltaX = midPointVector.dx
         let midPointDeltaY = midPointVector.dy
         
+        inertialScroller.vector = CGVector(dx: midPointDeltaX, dy: midPointDeltaY)
+        
         let originalPinchDelta = currentDistance-previousDistance;
         let pinchDelta = enablePinch ? originalPinchDelta*7*pinchSensitivity : 0;
         LiSendHighResScrollEvent(Int16(pinchDelta + midPointDeltaY*7*scrollSensitivity))
         if enableHorizontalScroll {LiSendHighResHScrollEvent(Int16(-midPointDeltaX*7*scrollSensitivity))}
         
-        if !enablePinch || !ctrlDownForPinch {return};
-        
-        if abs(originalPinchDelta) > abs(midPointDeltaY)*1.3, abs(originalPinchDelta) > abs(midPointDeltaX)*1.3 {
-            LiSendKeyboardEvent(CommandManager.keyboardButtonMappings["CTRL"]!, CChar(KEY_ACTION_DOWN), 0)
-            ctrlDown = true
-        } else {
-            LiSendKeyboardEvent(CommandManager.keyboardButtonMappings["CTRL"]!, CChar(KEY_ACTION_UP), 0)
-            ctrlDown = false
+        if enablePinch, ctrlDownForPinch {
+            let midPointDelta = hypot(midPointDeltaX, midPointDeltaY)
+            if abs(originalPinchDelta) > midPointDelta*1.3, midPointDelta < 2 {
+                LiSendKeyboardEvent(CommandManager.keyboardButtonMappings["CTRL"]!, CChar(KEY_ACTION_DOWN), 0)
+                ctrlDown = true
+            } else {
+                LiSendKeyboardEvent(CommandManager.keyboardButtonMappings["CTRL"]!, CChar(KEY_ACTION_UP), 0)
+                ctrlDown = false
+            }
         }
     }
 }

VoidLink/ViewControllers/StreamFrameViewController.m

@@ -451,6 +451,7 @@
     TouchPadGestureHandler.ctrlDownForPinch = _settings.ctrlDownForPinch;
     TouchPadGestureHandler.scrollSensitivity = _settings.scrollSensitivity.floatValue;
     TouchPadGestureHandler.pinchSensitivity = _settings.pinchSensitivity.floatValue;
+    TouchPadGestureHandler.displayLinkRate = _settings.framerate.intValue;
 
     NSLog(@"frameview gestures: %d", (uint32_t)[self.view.gestureRecognizers count]);
     NSLog(@"streamview gestures: %d", (uint32_t)[_streamView.gestureRecognizers count]);