public GridView(
Key key = null,
Axis scrollDirection = Axis.vertical,
bool reverse = false,
ScrollController controller = null,
bool?primary = null,
ScrollPhysics physics = null,
bool shrinkWrap = false,
EdgeInsetsGeometry padding = null,
SliverGridDelegate gridDelegate = null,
IndexedWidgetBuilder itemBuilder = null,
int?itemCount = null,
bool addAutomaticKeepAlives = true,
bool addRepaintBoundaries = true,
float?cacheExtent = null
) : base(
key: key,
scrollDirection: scrollDirection,
reverse: reverse,
controller: controller,
primary: primary,
physics: physics,
shrinkWrap: shrinkWrap,
padding: padding,
cacheExtent: cacheExtent
)
{
this.gridDelegate = gridDelegate;
childrenDelegate = new SliverChildBuilderDelegate(
itemBuilder,
childCount: itemCount,
addAutomaticKeepAlives: addAutomaticKeepAlives,
addRepaintBoundaries: addRepaintBoundaries
);
}
ListView(
Key key = null,
Axis scrollDirection = Axis.vertical,
bool reverse = false,
ScrollController controller = null,
bool?primary = null,
ScrollPhysics physics = null,
bool shrinkWrap = false,
EdgeInsetsGeometry padding = null,
float?itemExtent = null,
IndexedWidgetBuilder itemBuilder = null,
int?itemCount = null,
bool addAutomaticKeepAlives = true,
bool addRepaintBoundaries = true,
float?cacheExtent = null,
DragStartBehavior dragStartBehavior = DragStartBehavior.start,
ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual
) : base(key: key,
scrollDirection: scrollDirection,
reverse: reverse,
controller: controller,
primary: primary,
physics: physics,
shrinkWrap: shrinkWrap,
padding: padding,
cacheExtent: cacheExtent,
dragStartBehavior: dragStartBehavior,
keyboardDismissBehavior: keyboardDismissBehavior
)
{
D.assert(itemCount == null || itemCount >= 0);
this.itemExtent = itemExtent;
childrenDelegate = new SliverChildBuilderDelegate(
itemBuilder,
childCount: itemCount,
addAutomaticKeepAlives: addAutomaticKeepAlives,
addRepaintBoundaries: addRepaintBoundaries
);
}
ListView(
Key key = null,
Axis scrollDirection = Axis.vertical,
bool reverse = false,
ScrollController controller = null,
bool?primary = null,
ScrollPhysics physics = null,
bool shrinkWrap = false,
EdgeInsetsGeometry padding = null,
IndexedWidgetBuilder itemBuilder = null,
IndexedWidgetBuilder separatorBuilder = null,
int itemCount = 0,
bool addAutomaticKeepAlives = true,
bool addRepaintBoundaries = true,
float?cacheExtent = null,
DragStartBehavior dragStartBehavior = DragStartBehavior.start,
ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual
) : base(
key: key,
scrollDirection: scrollDirection,
reverse: reverse,
controller: controller,
primary: primary,
physics: physics,
shrinkWrap: shrinkWrap,
padding: padding,
cacheExtent: cacheExtent,
dragStartBehavior: dragStartBehavior,
keyboardDismissBehavior: keyboardDismissBehavior
)
{
D.assert(itemBuilder != null);
D.assert(separatorBuilder != null);
D.assert(itemCount >= 0);
itemExtent = null;
childrenDelegate = new SliverChildBuilderDelegate(
(context, index) => {
int itemIndex = index / 2;
Widget widget = null;
if (index % 2 == 0)
{
widget = itemBuilder(context, itemIndex);
}
else
{
widget = separatorBuilder(context, itemIndex);
D.assert(() => {
if (widget == null)
{
throw new UIWidgetsError("separatorBuilder cannot return null.");
}
return(true);
});
}
return(widget);
},
childCount: _computeActualChildCount(itemCount),
addAutomaticKeepAlives: addAutomaticKeepAlives,
addRepaintBoundaries: addRepaintBoundaries
);
}
