Scroll Problem on a Scrollable Screen

[bahricanyesil]

When I add a web view inside a screen that is scrollable, the mouse wheel actions are recognized by both the web view and the screen. Take the following case as an example:
I have a chart on a scrollable screen. Normally, the chart should zoom in/out when the mouse wheel is scrolled and the screen should NOT scroll. However, the screen is also scrolling while using this package. I am also using flutter_inappwebview package for the web platform. When I run the app on a desktop web, it does not have this issue. What can be the reason and how to fix it? @SinyimZhi Thanks from now on.

[SinyimZhi]

@bahricanyesil I think it is caused we didn't prevent the onPointerSignal event passed to the parent widget. Can you try to find webview.dart line 460 and change the code like this

the code is here if (p is PointerScrollEvent) { _controller._setScrollDelta(p.localPosition, p.scrollDelta.dx.round(), p.scrollDelta.dy.round()); }

[bahricanyesil]

Thanks for your quick response @SinyimZhi. I found and updated the related section in the webview.dart file as follows:

 onPointerSignal: (signal) {
            GestureBinding.instance.pointerSignalResolver.register(signal, (p) {
              if (p is PointerScrollEvent) {
                _controller._setScrollDelta(p.localPosition,
                    p.scrollDelta.dx.round(), p.scrollDelta.dy.round());
              }
            });
          },

The issue has gone and now we can scroll inside webview by preventing passing the scroll event to the parent.

Thank you so much @SinyimZhi 🙏 🥳

[bahricanyesil]

@SinyimZhi How to achieve the same thing for the hold and move action with the left click? I also want to disable parent actions for that type of event and only handle them inside the webview. Those events are types of onPointerMove/onPointerUp/onPointerDown instead of onPointerSignal. How to determine which widget handles those events, can you help?