Add optional parameter to specify type of animation #38
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The default animations on
TreeView
andSliverTreeView
work fine for small lists, but they break down with a large number of complex elements. This PR proposes an optionalAnimation<double>? animation
parameter for each of them (as well as each of their respective constructors) that allows users to specify a custom animation, including suppressing animation altogether.Omitting the
animation
parameter defaults animation to the package default, so this PR introduces no breaking changes.I've also added an optional
duration
parameter toscrollToItem
andscrollToIndex
that defaults to the library default.(Also—this is a feature born purely of self interest. I've got a big tree I'm trying to manage, and this library is perfect for my use case except that the thing freaks out when it tries to animate.)