gesture 1.0 -> 1.2

Runtime/foundation/debug.cs

 using Unity.UIWidgets.editor;
 using Unity.UIWidgets.painting;
 using Unity.UIWidgets.ui;
+using Canvas = Unity.UIWidgets.ui.Canvas;
+using Color = Unity.UIWidgets.ui.Color;
+using Rect = Unity.UIWidgets.ui.Rect;
-
         public static void logError(string message, Exception ex = null) {
             Debug.LogException(new AssertionError(message, ex));
         }
 #endif
             }
         }
-        
+
         [Conditional("UIWidgets_DEBUG")]
         public static void assert(Func<bool> result, string message = null) {
             if (!result()) {
 
         public static bool debugCheckIntrinsicSizes = false;
 
-        public static HSVColor debugCurrentRepaintColor = 
+        public static bool debugPrintMouseHoverEvents = false;
+
+        public static HSVColor debugCurrentRepaintColor =
             HSVColor.fromAHSV(0.4f, 60.0f, 1.0f, 1.0f);
 
         public static void _debugDrawDoubleRect(Canvas canvas, Rect outerRect, Rect innerRect, Color color) {
                 return true;
             });
         }
-        
+
-            bool? debugPaintPointersEnabled= null,
+            bool? debugPaintPointersEnabled = null,
-            bool? debugRepaintRainbowEnabled = null ) {
-
+            bool? debugRepaintRainbowEnabled = null) {
-            
+
-            
+
-            
-            if (debugPaintLayerBordersEnabled != null && debugPaintLayerBordersEnabled != D.debugPaintLayerBordersEnabled) {
+
+            if (debugPaintLayerBordersEnabled != null &&
+                debugPaintLayerBordersEnabled != D.debugPaintLayerBordersEnabled) {
-            
+
             if (debugRepaintRainbowEnabled != null && debugRepaintRainbowEnabled != D.debugRepaintRainbowEnabled) {
                 D.debugRepaintRainbowEnabled = debugRepaintRainbowEnabled.Value;
                 needRepaint = true;
     [Serializable]
     public class AssertionError : Exception {
         readonly Exception innerException;
-        
+
         public AssertionError(string message) : base(message) {
         }
 
                 if (this.innerException != null) {
                     return this.innerException.StackTrace;
                 }
-                
+
                 var stackTrace = base.StackTrace;
                 var lines = stackTrace.Split('\n');
                 var strippedLines = lines.Skip(1);

Runtime/gestures/binding.cs

                 this._handlePointerHoverEvent(evt);
             }
 
-            HitTestResult result;
+            HitTestResult result = null;
             if (evt is PointerDownEvent) {
                 D.assert(!this._hitTests.ContainsKey(evt.pointer));
                 result = new HitTestResult();
             else if (evt.down) {
                 result = this._hitTests.getOrDefault(evt.pointer);
             }
-            else {
-                return;
-            }
+
+            D.assert(() => {
+                if (D.debugPrintMouseHoverEvents && evt is PointerHoverEvent) {
+                    Debug.LogFormat("{0}", evt);
+                }
+
+                return true;
+            });
-            if (result != null) {
+            if (result != null ||
+                evt is PointerHoverEvent ||
+                evt is PointerAddedEvent ||
+                evt is PointerRemovedEvent
+            ) {
                 this.dispatchEvent(evt, result);
             }
         }
         }
 
         public void dispatchEvent(PointerEvent evt, HitTestResult result) {
+            if (result == null) {
+                D.assert(evt is PointerHoverEvent || evt is PointerAddedEvent || evt is PointerRemovedEvent);
+                try {
+                    this.pointerRouter.route(evt);
+                }
+                catch (Exception ex) {
+                    UIWidgetsError.reportError(new UIWidgetsErrorDetails(
+                            exception: ex,
+                            library: "gesture library",
+                            context: "while dispatching a non-hit-tested pointer event",
+                            informationCollector: information => {
+                                information.AppendLine("Event: ");
+                                information.AppendFormat(" {0}", evt);
+                            }
+                        )
+                    );
+                }
+
+                return;
+            }
+
             foreach (HitTestEntry entry in result.path) {
                 try {
                     entry.target.handleEvent(evt, entry);

Runtime/gestures/converter.cs

     public static class PointerEventConverter {
         static readonly Dictionary<int, _PointerState> _pointers = new Dictionary<int, _PointerState>();
 
+        static void clearPointers() {
+            _pointers.Clear();
+        }
+
         static _PointerState _ensureStateForPointer(PointerData datum, Offset position) {
             return _pointers.putIfAbsent(
                 datum.device,
                         if (state == null || !state.down) {
                             break;
                         }
-                        
+
                         D.assert(state.down);
                         if (position != state.lastPosition) {
                             Offset offset = position - state.lastPosition;

Runtime/gestures/monodrag.cs

         public DragGestureRecognizer(
             object debugOwner = null,
             PointerDeviceKind? kind = null,
-            DragStartBehavior dragStartBehavior = DragStartBehavior.start)
+            DragStartBehavior dragStartBehavior = DragStartBehavior.down)
             : base(debugOwner: debugOwner, kind: kind) {
             this.dragStartBehavior = dragStartBehavior;
         }
         public override void dispose() {
             this._velocityTrackers.Clear();
             base.dispose();
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new EnumProperty<DragStartBehavior>("start behavior", this.dragStartBehavior));
         }
     }
 

Runtime/gestures/recognizer.cs

     public enum GestureRecognizerState {
         ready,
         possible,
+        accepted,
         defunct,
     }
 
             object debugOwner = null,
-            PointerDeviceKind? kind = null
+            PointerDeviceKind? kind = null,
+            float? preAcceptSlotTolerance = Constants.kTouchSlop,
+            float? postAcceptSlotTolerance = Constants.kTouchSlop
+            D.assert(preAcceptSlotTolerance == null || preAcceptSlotTolerance >= 0,
+                "The preAcceptSlopTolerance must be positive or null");
+
+            D.assert(postAcceptSlotTolerance == null || postAcceptSlotTolerance >= 0,
+                "The postAcceptSlopTolerance must be positive or null");
+
+            this.preAcceptSlotTolerance = preAcceptSlotTolerance;
+            this.postAcceptSlotTolerance = postAcceptSlotTolerance;
+
+        public readonly float? preAcceptSlotTolerance;
+
+        public readonly float? postAcceptSlotTolerance;
 
         public GestureRecognizerState state = GestureRecognizerState.ready;
 
 
         protected override void handleEvent(PointerEvent evt) {
             D.assert(this.state != GestureRecognizerState.ready);
-            if (this.state == GestureRecognizerState.possible && evt.pointer == this.primaryPointer) {
-                if (evt is PointerMoveEvent && this._getDistance(evt) > Constants.kTouchSlop) {
+
+            if (evt.pointer == this.primaryPointer) {
+                bool isPreAcceptSlopPastTolerance = this.state == GestureRecognizerState.possible &&
+                                                    this.preAcceptSlotTolerance != null &&
+                                                    this._getDistance(evt) > this.preAcceptSlotTolerance;
+                bool isPostAcceptSlopPastTolerance = this.state == GestureRecognizerState.accepted &&
+                                                     this.postAcceptSlotTolerance != null &&
+                                                     this._getDistance(evt) > this.postAcceptSlotTolerance;
+
+                if (evt is PointerMoveEvent && (isPreAcceptSlopPastTolerance || isPostAcceptSlopPastTolerance)) {
                     this.resolve(GestureDisposition.rejected);
                     this.stopTrackingPointer(this.primaryPointer);
                 }
             D.assert(this.deadline == null);
         }
 
+        public override void acceptGesture(int pointer) {
+            if (pointer == this.primaryPointer && this.state == GestureRecognizerState.possible) {
+                this.state = GestureRecognizerState.accepted;
+            }
+        }
+
-            if (pointer == this.primaryPointer && this.state == GestureRecognizerState.possible) {
+            if (pointer == this.primaryPointer && (this.state == GestureRecognizerState.possible ||
+                                                   this.state == GestureRecognizerState.accepted)) {
                 this._stopTimer();
                 this.state = GestureRecognizerState.defunct;
             }