Tree Map Charts

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Tree map charts are interactive. Left clicking on a node displays its child nodes. Right clicking moves back up the tree.

Query
Requirements		 Column 1: Text - name
Column 2: Text - parent
Column 3: Text - size
Column 4: Text - (optional) colour

The query must return at least the first three columns, the fourth is optional. The root node should have a blank parent column.
Multiple Plots No
Axis Overrides No
Data Formatting No
Extra Columns No
The Google Charts API does allow custom tooltips but they are not supported by Plotalot for this chart type.