These modules provide interactive control of inputs to other modules in visual programs. The module in the VPE represents a connection to a widget in a control panel that can be set by the user.Interactors are named after the type of data they control:

• FileSelector -- Presents a standard Motif file-selector dialog box. The output is a file name.

• Integer -- Presents a stepper, slider, dial, or text interactor. The output is a whole number.

• IntegerList -- Presents a scrolled-list or text interactor. The output is a list of integers.

• Reset -- Presents a toggle button. The output is one value the first time it is run, and a different value on subsequent runs until the toggle is selected again.

• Scalar -- Presents a stepper, slider, dial, or text interactor. The output is a real number.

• ScalarList -- Presents a stepper, slider, dial, or text interactor. The output is list of scalar values.

• Selector -- Presents an option menu, a set of radio buttons, or a toggle button. The outputs are a value and a string, representing a choice from a selection.

• SelectorList -- Presents a selection list. The output is a list of values and a list of strings, representing a choice of one or more from many.

• String -- Presents a text interactor. The output is a text string.

• StringList -- Presents a scrolled-text list. The output is a list of strings.

• Toggle -- Presents a toggle button. The output is one of two values (set or unset).

• Value -- Presents a text interactor. The output is a value (scalar, vector, tensor, or matrix).

• ValueList -- Presents a scrolled list or text interactor. The output is a value list.

• Vector -- Presents a stepper or text interactor. The output is a vector.

• VectorList -- Presents a scrolled-list or text interactor. The output is a vector list.