Flex 4 Tree Lines

I've updated my previous blog post on Tree Lines to include a Flex 4/Spark version which uses the MXTreeItemRenderer class.

For more documentation on how to use it see the blog post linked above.


I've also updated the AdvancedDataGrid example to show tree lines in the tree:

Tree Lines

In Flex I've seen how you can configure Trees by changing the disclosure (expand/collapse) icon, the folder/leaf icons, background colors, indentation, etc. But I've never seen the option for rendering tree lines like you can in Java, C# and most other languages.

I've created a custom TreeItemRenderer that does renderer tree lines. It has these properties:

<ui:TreeItemLinesRenderer
Styles
lineAlpha="1"
lineColor="#808080"
lineThickness="1"
lineStyle="dotted"/>

And here is an example of it in action (right click to view source):


If you know of any other solutions out there I'd be interested to see them.

** September 28th 2009 Updated **
I've added another example application showing how to render tree lines in an AdvancedDataGrid control.

Flex Example Application

AdvancedDataGrid API

AdvancedDataGridGroupItemRenderer API

Flex 4/Spark Version
Here is a very similar version written in Flex 4. It uses a lot of the same code, but uses a Spark item renderer instead. There is probably a much nicer way to do this using the new Spark Path or Line controls, but since the code was already written I went with this solution.

An example of tree lines in an AdvancedDataGrid with a Flex 4 itemRenderer is on my newer blog post.