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 ); }