In that case you can see the example named "In-Page Drilldown with Perma-linking" in the Splunk 6.x Dashboard example app under Drilldown Element examples. This gives similar example where user can click on first visualization, take the value from clicked element and show/run another visualization with a search using clicked element value. The app can be found here https://splunkbase.splunk.com/app/1603/
Mouse hover action is not available by default and will require some custom JS.
In case you can't download/install it right away, here is the runanywhere code from that app for the example I want you to look.
You can change the drilldown elements in a visualization, when editing a visualization, you can also choose to "Show Data values". If you want to know more about those, you should download the "Splunk 6.x Dashboard Examples" app for good examples.