scrollable.dart

Scrollable(
                    axisDirection: AxisDirection.right,
                    controller: _pageController,
                    physics: const PageScrollPhysics(parent: ClampingScrollPhysics()),
                    viewportBuilder: (BuildContext context, ViewportOffset offset) {
                      return LayoutBuilder(
                        builder: (context, constraints) {
                          offset.applyViewportDimension(constraints.maxWidth);
                          offset.applyContentDimensions(0.0, constraints.maxWidth);
                          return AnimatedBuilder(
                            animation: offset,
                            builder: (BuildContext context, Widget child) {
                              return Transform.translate(
                                offset: Offset(-offset.pixels, 0.0),
                                child: child,
                              );
                            },
                            child: ChangeNotifierProvider<ViewportOffset>.value(
                              value: offset,
                              child: OverflowBox(
                                alignment: Alignment.topLeft,
                                minHeight: constraints.maxHeight,
                                maxHeight: constraints.maxHeight,
                                minWidth: constraints.maxWidth * 2,
                                maxWidth: constraints.maxWidth * 2,
                                child: Row(
                                  crossAxisAlignment: CrossAxisAlignment.stretch,
                                  children: [
                                    Expanded(
                                      child: Page1(),
                                    ),
                                    Expanded(
                                      child: Page2(),
                                    ),
                                  ],
                                ),
                              ),
                            ),
                          );
                        },
                      );
                    },
                  ),