Making a node expandable without adding children

[Jonathan Nightingale]

This is a great widget, and I’ve found it easy to use.

A question though: I have a dynamic tree, and fill the children of a node in when that node is expanded, in the onExpansionChanged callback, which in itself is working well.

However a node is only expandable in the first place if the children list is non-empty; at the moment I’m hacking this by adding a placeholder node, but what is the recommended way of handling this?

I can’t think of clean way other than filling in the children at the level above - but in my case this would mean fetching more data than I really want to.

Thanks,

Jon

[Kevin Armstrong]

Hi Jonathan. I’m glad the widget is working well for you.

There currently isn’t a clean way to perform this functionality. In fact, as I was reading this issue, my immediate thought was to place a node in the children array to allow the node to be expanded just as you did.

What I will do is add a property that will force the node to be a parent that can be expanded. That will be a fairly easy update that I should be able to publish later today.

[Jonathan Nightingale]

That would be brilliant, thanks. There’s no big rush from my side, but if you do add it I’m happy to pick it up and use it.

Thanks again,

Jon

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[Kevin Armstrong]

Fixes issue #18 - introduced vertical and horizontal spacing Fixes issue #19 - added parent flag to Node to force parent layout Fixes issue #22 - fixed various styling properties with the TreeNode and TreeViewTheme

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