Widget _buildItem(BuildContext context, int index)
{
return(new AnimatedBuilder(
animation: this._pageController,
builder: (BuildContext c, Widget w) => {
int renderIndex = this._pageController.getRenderIndexFromRealIndex(index);
Widget child = null;
if (this.widget.itemBuilder != null)
{
child = this.widget.itemBuilder(context, renderIndex);
}
if (child == null)
{
child = new Container();
}
if (this._size == null)
{
return child ?? new Container();
}
float position;
float page = this._pageController.realPage;
if (this._transformer.reverse)
{
position = page - index;
}
else
{
position = index - page;
}
position *= this.widget.viewportFraction;
TransformInfo info = new TransformInfo(
index: renderIndex,
width: this._size.width,
height: this._size.height,
position: position.clamp(-1.0f, 1.0f),
activeIndex: this._pageController.getRenderIndexFromRealIndex(this._activeIndex),
fromIndex: this._fromIndex,
forward: this._pageController.position.pixels - this._currentPixels >= 0,
done: this._done,
scrollDirection: this.widget.scrollDirection,
viewportFraction: this.widget.viewportFraction);
return this._transformer.transform(child, info);
}));
}
public override Widget transform(Widget child, TransformInfo info)
{
return(this.builder(child: child, info: info));
}
public abstract Widget transform(Widget child, TransformInfo info);
