Clover's HTML report now includes a coverage treemap report.
The coverage treemap report allows simultaneous comparison of classes and package by complexity and by code coverage. The treemap is divided by package (labelled) and then further divided by class (unlabelled). The size of the package or class indicates its complexity (larger squares indicate great complexity, while smaller squares indicate less complexity). Colours indicate the level of coverage, as follows:
Left clicking on a package title will show a package level treemap with greater detail. Right clicking on a package area will zoom out one level. Clicking on a class will navigate to the corresponding source file view.