bool _hasDraggedTooFar(DragUpdateDetails details)
{
Offset offCenter = details.localPosition - new Offset(size.width / 2, size.height / 2);
return(Mathf.Pow(Mathf.Max(0, offCenter.dx.abs() - size.width / 2), 2) + Mathf.Pow(Mathf.Max(0, offCenter.dy.abs() - size.height / 2), 2) > CupertinoSlidingSegmentedControlsUtils._kTouchYDistanceThreshold);
}
void _handleDragUpdate(DragUpdateDetails details)
{
if (!this._isActive || this._moveController.isAnimating)
{
return;
}
float delta = details.primaryDelta ?? 0.0f;
float oldDragExtent = this._dragExtent;
switch (this.widget.direction)
{
case DismissDirection.horizontal:
case DismissDirection.vertical:
this._dragExtent += delta;
break;
case DismissDirection.up:
if (this._dragExtent + delta < 0)
{
this._dragExtent += delta;
}
break;
case DismissDirection.down:
if (this._dragExtent + delta > 0)
{
this._dragExtent += delta;
}
break;
case DismissDirection.endToStart:
switch (Directionality.of(this.context))
{
case TextDirection.rtl:
if (this._dragExtent + delta > 0)
{
this._dragExtent += delta;
}
break;
case TextDirection.ltr:
if (this._dragExtent + delta < 0)
{
this._dragExtent += delta;
}
break;
}
break;
case DismissDirection.startToEnd:
switch (Directionality.of(this.context))
{
case TextDirection.rtl:
if (this._dragExtent + delta < 0)
{
this._dragExtent += delta;
}
break;
case TextDirection.ltr:
if (this._dragExtent + delta > 0)
{
this._dragExtent += delta;
}
break;
}
break;
}
if (oldDragExtent.sign() != this._dragExtent.sign())
{
this.setState(() => { this._updateMoveAnimation(); });
}
if (!this._moveController.isAnimating)
{
this._moveController.setValue(this._dragExtent.abs() / this._overallDragAxisExtent);
}
}
