https://github.com/kyorohiro/hello_skyengine/tree/master/widget_scrollableviewport
// following code is checked in 2015/12/13import 'package:flutter/material.dart';import 'package:flutter/services.dart';void main() {// ScrollDirection.vertical.both is developping now. 2016/01/13//https://github.com/flutter/engine/issues/888Widget b1 = new AssetImage(name: "assets/a.png", width: 300.0, height: 300.0, bundle:rootBundle);Widget b2 = new AssetImage(name: "assets/b.png", width: 300.0, height: 300.0, bundle:rootBundle);Row r1 = new Row([b1, b2, b1, b2, b1, b2, b1, b2, b1]);Row r2 = new Row([b2, b1, b2, b1, b2, b1, b2, b1, b2]);Column g = new Column([r1, r2, r1, r2, r1, r2, r1, r2, r1]);ScrollableViewport viewPortH = new ScrollableViewport(child: g, scrollDirection: ScrollDirection.horizontal,onScroll: (double scrollOffset) {print("---h-${scrollOffset}--");});ScrollableViewport viewPortV = new ScrollableViewport(child: viewPortH, scrollDirection: ScrollDirection.vertical,onScroll: (double scrollOffset) {print("---v-${scrollOffset}--");});runApp(viewPortV);}
#flutter.yamlassets:- assets/icon.jpeg- assets/icon2.jpeg- assets/a.png- assets/b.png