Implementing Twitter keyword search and analytics

I want to implement real time twitter search and analytics in my Report, but I am stuck. How can I enter any keyword (there must be some visual to enter data) and then passing this text to any parameter which can be used to fetch data related to that keyword .

Currently you can only change value of parameter by going in toolbox then manage parameter and then you need to refresh the whole report. Can't I use any visual to enter data and then on submitting my whole report should refresh for that keyword.