The Text widget displays editable text.
  Text fields can be single-line (style SINGLE) or multi-line
  (style MULTI).
  
  Text fields with masked echo characters for entering passwords can be created
  by specifying the PASSWORD style.
  Those password fields are always single-line.
  
  Text fields can be created in read-only mode using the READ_ONLY
  style. The read-only mode can also be toggled at runtime using
  setEditable().
  
The Spinner widget looks similar to a single-line Text field, but it only allows to enter numbers within a certain range. The min and max values can be configured. Every time the value of the Spinner changes, a selection event is fired.
The Combo box is available in two different flavors. In the read-only mode, it only allows to select preconfigured values from the drop-down list. In editable mode, it also allows to edit the selection in the text field.