How to disable the data view options at the bottom of a widget?

I am using some Piwik visualization widgets in a website that I’m writing, but I would like to use a custom series of tabs to change the visualization. Is there an option to remove them or an easy way to disable the icons at the bottom of a widget?

I’m also trying to write a custom widget to display page views by page title. Is there documentation anywhere on how to generate an evolutionGraph, or a clear example in the existing codebase? The best example that I have found so far is the Goals Overview in the Goals plugin, but I still haven’t quite figured it out.