Tap on body of ExpandablePanel does not expand the widget when it is collapsed.

[bambinoua]

Tap on body of ExpandablePanel does not expand the widget when it is collapsed. Tap on body of ExpandablePanel collapse the widget when it is expanded. In version 3.0.1 tap on body behavour was the same as tap on icon behavour. Is it possible to fix this?

[aryzhov]

I will take a look, thank you.

[Viper-Bit]

@aryzhov i think it comes from line 458

        return builder(context, collapsed, buildBody(expanded));

and line 461

          collapsed: collapsed,

maybe u missed buildBody for collapsed object, i can make a pull if u will

flutter-expandable/lib/expandable.dart

Line 458 in 6d33499

return builder(context, collapsed, buildBody(expanded));

flutter-expandable/lib/expandable.dart

Line 461 in 6d33499

collapsed: collapsed,

[aryzhov]

The current behavior is by design. The parameter tapBodyToCollapse works only for collapsing, not for expanding. ExpandablePanel has an icon that is supposed to be used for expansion. Optionally, you may use tapHeaderToExpand to extend the expansion trigger to the header. Extending this to the body would not yield better usability as the user would not know that clicking on the body would expand it. In addition, if your collapsed body is long enough, it might impact scrolling where the user accidentally expands the body by clicking on it.

The reason tapBodyOnCollapse exists is for cases when the expanded body occupies the entire screen and there's no desire to add a button that collapses it.

If you still wish to implement this behavior, simply wrap your expanded body into ExpandableButton.

[aryzhov]

I added this feature to version 4.1.0 that has been released. You can specify tabBodyToExpand: true in the theme.