diff --git a/src/Avalonia.Base/Input/GestureRecognizers/ScrollGestureRecognizer.cs b/src/Avalonia.Base/Input/GestureRecognizers/ScrollGestureRecognizer.cs index e2deea0fde..cec98ec66b 100644 --- a/src/Avalonia.Base/Input/GestureRecognizers/ScrollGestureRecognizer.cs +++ b/src/Avalonia.Base/Input/GestureRecognizers/ScrollGestureRecognizer.cs @@ -113,7 +113,7 @@ namespace Avalonia.Input.GestureRecognizers _scrolling = true; if (_scrolling) { - _velocityTracker = new VelocityTracker(); // TODO: Should be platform specific -- this default tracker is for Android. + _velocityTracker = new VelocityTracker(); // Correct _trackedRootPoint with ScrollStartDistance, so scrolling does not start with a skip of ScrollStartDistance _trackedRootPoint = new Point( diff --git a/src/Avalonia.Base/Input/GestureRecognizers/VelocityTracker.cs b/src/Avalonia.Base/Input/GestureRecognizers/VelocityTracker.cs index d4705bcdca..9482542b45 100644 --- a/src/Avalonia.Base/Input/GestureRecognizers/VelocityTracker.cs +++ b/src/Avalonia.Base/Input/GestureRecognizers/VelocityTracker.cs @@ -1,40 +1,13 @@ // Code in this file is derived from // https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/gestures/velocity_tracker.dart -//Copyright 2014 The Flutter Authors. All rights reserved. - -//Redistribution and use in source and binary forms, with or without modification, -//are permitted provided that the following conditions are met: - -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. - -//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND -//ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -//WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -//DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR -//ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES -//(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -//LOSS OF USE, DATA, OR PROFITS; -//OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON -//ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -//(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -//SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - using System; using System.Diagnostics; using Avalonia.Utilities; namespace Avalonia.Input.GestureRecognizers { - // TODO: add 'IOSScrollViewFlingVelocityTracker' and 'MacOSScrollViewFlingVelocityTracker'? + // Possible enhancement: add Flutter's 'IOSScrollViewFlingVelocityTracker' and 'MacOSScrollViewFlingVelocityTracker'? public readonly record struct Velocity(Vector PixelsPerSecond) { @@ -92,7 +65,7 @@ namespace Avalonia.Input.GestureRecognizers private const int HistorySize = 20; private const int HorizonMilliseconds = 100; private const int MinSampleSize = 3; - private const double MinFlingVelocity = 50.0; // Logical pixels / second (defined in flutter\lib\src\gesture\constants.dart) + private const double MinFlingVelocity = 50.0; // Logical pixels / second private const double MaxFlingVelocity = 8000.0; private readonly PointAtTime[] _samples = new PointAtTime[HistorySize];