[ScrollView] Shouldn't become responder if scrollEnabled is false

[hayeah]

I am doing a sortable list proof-of-concept with ReactNative. One of the effects I want to achieve is to auto-scroll a long list if the dragged item is near the bottom (or top) of the screen. Like so:

To prevent scroll view from scrolling while an item is dragged, I set ScrollView's "scrollEnabled" prop to false, which seems to do the trick. The only problem is if I use the scrollTo method to programmatically scroll, the scrollView mistakenly thinks a user-initiated scroll event occurred, and tries to steal the responder status.

The chain of events is illustrated by these diagrams:

The way to fix this problem is to check whether scrollEnabled is false in scrollResponderHandleScrollShouldSetResponder.

[ide]

cc @jordwalke @spicyj

[chirag04]

@hayeah awesome demo! I was looking for a solution like this. Is the code open sourced for the sortable list?

[hayeah]

@chirag04 See react-native-SortableList

[chirag04]

👍

[bakso]

@vjeux @brentvatne @ide @spicyj
Awesome demo! I was looking for a solution like this, do you have a solution for this situation now?

[mkonicek]

Hi there! This issue is being closed because it has been inactive for a while.

But don't worry, it will live on with ProductPains! Check out its new home: https://productpains.com/post/react-native/scrollview-shouldnt-become-responder-if-scrollenabled-is-false

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