public Boolean OnFling(MotionEvent?e1,
MotionEvent?e2,
Single velocityX,
Single velocityY)
{
//System.Diagnostics.Debug.WriteLine("[OKYN] ANDROID REPORTS FLING vx: " + velocityX +
// " vy: " + velocityY);
if (e1 == null)
{
return(false);
}
var pos = GetPosition(e1);
var vx = velocityX * 0.5;
var vy = 0 - velocityY * 0.5;
if (Math.Abs(vx) >= MinimumFlingVelocity ||
Math.Abs(vy) >= MinimumFlingVelocity)
{
var flingArgs = new FlingEventArgs(vx * _dpiRatio,
vy * _dpiRatio, pos, this, RemoveFlingInteraction);
AddInteraction(InputAction.Fling);
if (!_inputHandler.OnMouseInput(flingArgs, InputAction.Fling))
{
flingArgs.SetHandled(false);
//RemoveInteraction(InputAction.Fling);
}
}
return(true);
}
public Boolean OnInput(FlingEventArgs args)
{
if (!IsScrollWithMouseDrag)
{
return(false);
}
var working = _flingHandler.OnInput(args);
if (working)
{
args.InputContext.TryCaptureMouseInput(this);
}
return(working);
}
public virtual bool OnFling(FlingEventArgs e)
{
if (this.FlingGesture != null)
{
this.FlingGesture(this, e);
}
return e.Handled;
}
public Boolean PreFilterMessage(ref Message m)
{
ValuePoint2D pos;
switch ((MessageTypes)m.Msg)
{
case MessageTypes.WM_LBUTTONDOWN:
pos = GetPosition(m);
//if (m.HWnd != _window.Handle)
//{
// var surrogate = _window.Controls.FindControl(m.HWnd);
// if (surrogate == null)
// return false;
//}
_leftButtonWentDown = pos;
//System.Diagnostics.Debug.WriteLine("on l button down");
_inputHandler.OnMouseInput(
new MouseDownEventArgs(pos, MouseButtons.Left, this),
InputAction.LeftMouseButtonDown);
break;
case MessageTypes.WM_RBUTTONDOWN:
pos = GetPosition(m);
_rightButtonWentDown = pos;
_inputHandler.OnMouseInput(
new MouseDownEventArgs(pos, MouseButtons.Right, this),
InputAction.RightMouseButtonDown);
break;
case MessageTypes.WM_RBUTTONUP:
_inputHandler.OnMouseInput(
new MouseUpEventArgs(GetPosition(m),
_rightButtonWentDown,
MouseButtons.Right, this, true),
InputAction.RightMouseButtonUp);
_rightButtonWentDown = default;
_lastDragPosition = default;
break;
case MessageTypes.WM_MOUSEWHEEL:
var args = new MouseWheelEventArgs(CursorPosition,
(Int64)m.WParam >= Int32.MaxValue ? 1 : -1, this);
_inputHandler.OnMouseInput(args, InputAction.MouseWheel);
break;
case MessageTypes.WM_LBUTTONUP:
pos = GetPosition(m);
var dt = _lastDragTimestamp - _nextToLastDragTimestamp;
FlingEventArgs?flingArgs = null;
if (_lastDragPosition != null &&
_nextToLastDragPosition != null &&
dt > 0)
{
var ddt = dt / 100000.0;
var vx = (_lastDragPosition.Value.X -
_nextToLastDragPosition.Value.X) / ddt;
var vy = (_nextToLastDragPosition.Value.Y -
_lastDragPosition.Value.Y) / ddt;
if (vx.IsNotZero() || vy.IsNotZero())
{
vx *= 50;
vy *= 50;
if (Math.Abs(vx) >= MinimumFlingVelocity ||
Math.Abs(vy) >= MinimumFlingVelocity)
{
flingArgs = new FlingEventArgs(vx, vy, pos, this, null);
}
}
}
var lBtnArgs = new MouseUpEventArgs(pos,
_leftButtonWentDown,
MouseButtons.Left, this, true);
_leftButtonWentDown = default;
_lastDragPosition = default;
_nextToLastDragPosition = default;
_nextToLastDragTimestamp = 0;
_lastDragTimestamp = 0;
//System.Diagnostics.Debug.WriteLine("on l button up");
_inputHandler.OnMouseInput(lBtnArgs,
InputAction.LeftMouseButtonUp);
if (flingArgs != null)
{
_inputHandler.OnMouseInput(flingArgs.Value, InputAction.Fling);
}
break;
case MessageTypes.WM_MOUSEMOVE:
pos = GetPosition(m.LParam);
//shouldn't be needed but stops debugging headaches for now
//if (_leftButtonWentDown != null &&
// !IsButtonPressed(MouseButtons.Left))
// _leftButtonWentDown = default;
//if (_rightButtonWentDown != null &&
// !IsButtonPressed(MouseButtons.Right))
_rightButtonWentDown = default;
var letsUse = _leftButtonWentDown ?? _rightButtonWentDown;
if (letsUse == null)
{
_inputHandler.OnMouseMove(pos, this);
break;
}
ValueSize lastDragChange;
if (_lastDragPosition == null)
{
lastDragChange = new ValueSize(pos.X - letsUse.Value.X,
pos.Y - letsUse.Value.Y);
}
else
{
lastDragChange = new ValueSize(pos.X - _lastDragPosition.Value.X,
pos.Y - _lastDragPosition.Value.Y);
}
if (lastDragChange.IsEmpty)
{
break;
}
_nextToLastDragPosition = _lastDragPosition;
_lastDragPosition = pos;
_nextToLastDragTimestamp = _lastDragTimestamp;
_lastDragTimestamp = DateTime.Now.Ticks;
//if (_nextToLastDragPosition != null)
//{
// Debug.WriteLine("last drag: " + _lastDragPosition + " t: " + _lastDragTimestamp +
// " 2nd: " + _nextToLastDragPosition + " t: " + _nextToLastDragTimestamp);
//}
var dragArgs = new DragEventArgs(letsUse, pos, lastDragChange,
_leftButtonWentDown != null ? MouseButtons.Left : MouseButtons.Right,
this);
//Debug.WriteLine("Sending drag event: " + dragArgs.LastChange.Height);
_inputHandler.OnMouseInput(dragArgs, InputAction.MouseDrag);
break;
case MessageTypes.WM_QUERYDRAGICON:
break;
case MessageTypes.WM_MOUSEHWHEEL:
throw new NotImplementedException();
}
return(false);
}
