Dragging and dropping DragAndDropListExpansion should collapse all DragAndDropListExpansion

[lhengl]

As per the title, dragging and dropping DragAndDropListExpansion should collapse all DragAndDropListExpansion. I haven't been able to find a way to do this with the package. All sub lists will be moved with the state that the drag action started. If they were already opened, the items will be moved in its opened state. This makes it hard to actually do the re-ordering especially if the sub list is the size of half or more of the screen.

Is there a workaround to this, or can this please be added as a feature? Thank you.

[thaidmfinnick]

Hi @lhengl, I've met a problem like you. It brings bad experience for user. Any suggestion and how to solve this problem?

Hope @philip-brink will answer! Thankss!

[thaidmfinnick]

I have solution to workaround with this problem:

1. inside drag_and_drop_list_expansion.dart, author creates 1 generateWidget function to render expansion tile and when dragging, author uses generateWidget with contents to show feedback. That's why expansion tile still opens while dragging.

2. solution is we will create generateWidgetWithoutChildren, we don't pass contents to this, and we call this method in drag_and_drop_list_wrapper.dart, feedback atrributes we pass generateWidgetWithoutChildren and done!

If you want to see details in my solution, you can consider this fork: https://github.com/thaidmfinnick/DragAndDropLists/blob/master/lib/drag_and_drop_list_expansion.dart