bool _handleScrollStart(ScrollStartNotification notification)
{
// This is used to interrupt useless callback when the pull up load rolls back.
if (notification.metrics.outOfRange())
{
return(false);
}
GestureProcessor topWrap = this._headerKey.currentState as GestureProcessor;
GestureProcessor bottomWrap = this._footerKey.currentState as GestureProcessor;
if (this.widget.enablePullUp)
{
bottomWrap.onDragStart(notification);
}
if (this.widget.enablePullDown)
{
topWrap.onDragStart(notification);
}
return(false);
}
Widget _buildSwiper()
{
IndexedWidgetBuilder itemBuilder;
if (widget.onTap != null)
{
itemBuilder = _wrapTap;
}
else
{
itemBuilder = widget.itemBuilder;
}
if (widget.layout == SwiperLayout.STACK)
{
return(new _StackSwiper(
loop: widget.loop,
itemWidth: widget.itemWidth,
itemHeight: widget.itemHeight,
itemCount: widget.itemCount,
itemBuilder: itemBuilder,
index: _activeIndex,
curve: widget.curve,
duration: widget.duration,
onIndexChanged: _onIndexChanged,
controller: _controller,
scrollDirection: widget.scrollDirection
));
}
else if (_isPageViewLayout())
{
PageTransformer transformer = widget.transformer;
if (widget.scale != 0 || widget.fade != 0)
{
transformer =
new ScaleAndFadeTransformer(scale: widget.scale, fade: widget.fade);
}
Widget child = new TransformerPageView(
pageController: _pageController,
loop: widget.loop,
itemCount: widget.itemCount,
itemBuilder: itemBuilder,
transformer: transformer,
viewportFraction: widget.viewportFraction,
index: _activeIndex,
duration: TimeSpan.FromMilliseconds(widget.duration),
scrollDirection: widget.scrollDirection,
onPageChanged: _onIndexChanged,
curve: widget.curve,
physics: widget.physics,
controller: _controller
);
if (widget.autoplayDisableOnInteraction && widget.autoplay)
{
return(new NotificationListener <ScrollNotification>(
child: child,
onNotification: (ScrollNotification notification) =>
{
ScrollStartNotification ssno = notification as ScrollStartNotification;
if (ssno != null)
{
if (ssno.dragDetails != null)
{
//by human
if (_timer != null)
{
_stopAutoplay();
}
}
}
else if (notification is ScrollEndNotification)
{
if (_timer == null)
{
_startAutoplay();
}
}
return false;
}
));
}
return(child);
}
else if (widget.layout == SwiperLayout.TINDER)
{
return(new _TinderSwiper(
loop: widget.loop,
itemWidth: widget.itemWidth,
itemHeight: widget.itemHeight,
itemCount: widget.itemCount,
itemBuilder: itemBuilder,
index: _activeIndex,
curve: widget.curve,
duration: widget.duration,
onIndexChanged: _onIndexChanged,
controller: _controller,
scrollDirection: widget.scrollDirection
));
}
else if (widget.layout == SwiperLayout.CUSTOM)
{
return(new _CustomLayoutSwiper(
loop: widget.loop,
option: widget.customLayoutOption,
itemWidth: widget.itemWidth,
itemHeight: widget.itemHeight,
itemCount: widget.itemCount,
itemBuilder: itemBuilder,
index: _activeIndex,
curve: widget.curve,
duration: widget.duration,
onIndexChanged: _onIndexChanged,
controller: _controller,
scrollDirection: widget.scrollDirection
));
}
else
{
return(new Container());
}
}
public void onDragStart(ScrollStartNotification notification)
{
// throw new NotImplementedException();
}
