The C1DropDown is a basic drop-down control that can be used as a base to create custom drop-down controls such as date picker, auto complete menus, etc. The control comprises three major elements including a Header view, a button, and a DropDown view. The header includes the entire width of the control, while the button is placed on the top of the header, indicating that the control can be expanded. The drop-down includes the entire length of the control and gets expanded or collapsed.