Trouble setting up Input Controls

My report currently generates a stacked bar graph, where it lists every project in the database (each associated with a project_type), and the bars represent the number of tasks for the project in each status (To Verify, To Do, In Progress). 

I would like to add a function for users in Jasperreports Server to filter which projects they want to see using a checkbox or list to select the project_type for which they want to see data for. I tried using a multi select query input control as I searched online, but the examples used simpler queries and I was unable to apply the same concept to my own report. My query for the report currently looks like

SELECT PROJECT_TYPE.PROJECT_TYPE_NAME, PROJECT.PROJECT_NAME, STATUS_TYPE.STATUS_TYPE_NAME,

COUNT(*) AS Tasks

FROM TASK

INNER JOIN PROJECT ON PROJECT.PROJECT_ID = TASK.PROJECT_ID

AND PROJECT.POURCENTAGE < 100

AND PROJECT.PROJECT_TYPE < 6

AND PROJECT.PROJECT_STATUS_ID < 3

INNER JOIN PROJECT_TYPE ON PROJECT.PROJECT_TYPE = PROJECT_TYPE.PROJECT_TYPE_ID

INNER JOIN STATUS_TYPE ON TASK.STATUS_TYPE_ID = STATUS_TYPE.STATUS_TYPE_ID

INNER JOIN PRIORITY_TYPE ON TASK.PRIORITY_TYPE_ID = PRIORITY_TYPE.PRIORITY_TYPE_ID

AND NOT PRIORITY_TYPE.PRIORITY_TYPE_NAME = 'Hold'

AND STATUS_TYPE.STATUS_TYPE_NAME IN ('To do','In Progress', 'To Verify')

GROUP BY PROJECT_TYPE.PROJECT_TYPE_NAME, PROJECT.PROJECT_NAME, STATUS_TYPE.STATUS_TYPE_NAME

order by 2, case status_type_name

  when 'To do' then 1

  when 'In Progress' then 2

  when 'To Verify' then 3

  else 4

  end

How should the query for the input control and the parameter be set up in this case?