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@ -11,7 +11,7 @@ namespace Avalonia.Android.Platform.Specific.Helpers |
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private TView _view; |
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public bool HandleEvents { get; set; } |
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public AndroidTouchEventsHelper(TView view, Func<IInputRoot> getInputRoot, Func<MotionEvent, Point> getPointfunc) |
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public AndroidTouchEventsHelper(TView view, Func<IInputRoot> getInputRoot, Func<MotionEvent, int, Point> getPointfunc) |
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{ |
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this._view = view; |
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HandleEvents = true; |
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@ -19,11 +19,9 @@ namespace Avalonia.Android.Platform.Specific.Helpers |
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_getInputRoot = getInputRoot; |
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} |
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private DateTime _lastTouchMoveEventTime = DateTime.Now; |
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private Point? _lastTouchMovePoint; |
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private Func<MotionEvent, Point> _getPointFunc; |
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private TouchDevice _touchDevice = new TouchDevice(); |
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private Func<MotionEvent, int, Point> _getPointFunc; |
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private Func<IInputRoot> _getInputRoot; |
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private Point _point; |
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public bool? DispatchTouchEvent(MotionEvent e, out bool callBase) |
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{ |
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@ -33,89 +31,44 @@ namespace Avalonia.Android.Platform.Specific.Helpers |
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return null; |
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} |
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RawPointerEventType? mouseEventType = null; |
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var eventTime = DateTime.Now; |
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//Basic touch support
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switch (e.Action) |
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var pointerEventType = e.Action switch |
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{ |
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case MotionEventActions.Move: |
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//may be bot flood the evnt system with too many event especially on not so powerfull mobile devices
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if ((eventTime - _lastTouchMoveEventTime).TotalMilliseconds > 10) |
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{ |
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mouseEventType = RawPointerEventType.Move; |
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} |
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break; |
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case MotionEventActions.Down: |
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mouseEventType = RawPointerEventType.LeftButtonDown; |
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MotionEventActions.Down => RawPointerEventType.TouchBegin, |
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MotionEventActions.Up => RawPointerEventType.TouchEnd, |
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MotionEventActions.Cancel => RawPointerEventType.TouchCancel, |
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_ => RawPointerEventType.TouchUpdate |
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}; |
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break; |
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if (e.Action.HasFlag(MotionEventActions.PointerDown)) |
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{ |
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pointerEventType = RawPointerEventType.TouchBegin; |
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} |
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case MotionEventActions.Up: |
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mouseEventType = RawPointerEventType.LeftButtonUp; |
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break; |
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if (e.Action.HasFlag(MotionEventActions.PointerUp)) |
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{ |
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pointerEventType = RawPointerEventType.TouchEnd; |
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} |
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if (mouseEventType != null) |
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for (int i = 0; i < e.PointerCount; i++) |
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{ |
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//if point is in view otherwise it's possible avalonia not to find the proper window to dispatch the event
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_point = _getPointFunc(e); |
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var point = _getPointFunc(e, i); |
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double x = _view.View.GetX(); |
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double y = _view.View.GetY(); |
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double r = x + _view.View.Width; |
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double b = y + _view.View.Height; |
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if (x <= _point.X && r >= _point.X && y <= _point.Y && b >= _point.Y) |
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if (x <= point.X && r >= point.X && y <= point.Y && b >= point.Y) |
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{ |
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var inputRoot = _getInputRoot(); |
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var mouseDevice = Avalonia.Android.Platform.Input.AndroidMouseDevice.Instance; |
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//in order the controls to work in a predictable way
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//we need to generate mouse move before first mouse down event
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//as this is the way buttons are working every time
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//otherwise there is a problem sometimes
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if (mouseEventType == RawPointerEventType.LeftButtonDown) |
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{ |
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var me = new RawPointerEventArgs(mouseDevice, (uint)eventTime.Ticks, inputRoot, |
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RawPointerEventType.Move, _point, RawInputModifiers.None); |
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_view.Input(me); |
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} |
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var mouseEvent = new RawPointerEventArgs(mouseDevice, (uint)eventTime.Ticks, inputRoot, |
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mouseEventType.Value, _point, RawInputModifiers.LeftMouseButton); |
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var mouseEvent = new RawTouchEventArgs(_touchDevice, (uint)eventTime.Ticks, inputRoot, |
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i == e.ActionIndex ? pointerEventType : RawPointerEventType.TouchUpdate, point, RawInputModifiers.None, e.GetPointerId(i)); |
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_view.Input(mouseEvent); |
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if (e.Action == MotionEventActions.Move && mouseDevice.Captured == null) |
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{ |
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if (_lastTouchMovePoint != null) |
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{ |
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//raise mouse scroll event so the scrollers
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//are moving with the cursor
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double vectorX = _point.X - _lastTouchMovePoint.Value.X; |
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double vectorY = _point.Y - _lastTouchMovePoint.Value.Y; |
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//based on test correction of 0.02 is working perfect
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double correction = 0.02; |
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var ps = AndroidPlatform.Instance.LayoutScalingFactor; |
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var mouseWheelEvent = new RawMouseWheelEventArgs( |
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mouseDevice, |
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(uint)eventTime.Ticks, |
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inputRoot, |
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_point, |
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new Vector(vectorX * correction / ps, vectorY * correction / ps), RawInputModifiers.LeftMouseButton); |
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_view.Input(mouseWheelEvent); |
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} |
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_lastTouchMovePoint = _point; |
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_lastTouchMoveEventTime = eventTime; |
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} |
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else if (e.Action == MotionEventActions.Down) |
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{ |
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_lastTouchMovePoint = _point; |
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} |
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else |
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{ |
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_lastTouchMovePoint = null; |
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} |
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} |
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} |
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Max Katz
5 years ago
GitHub