This is the inner representation of the Text input.
| allowedCharacters | Method to override to indicate the allowed characters in the actual field. |
| formatString | Format the string. |
| ApplyInputDeviceDelta | Called when the user is dragging the label to update the value contained in the field. |
| StartDragging | Method called by the application when the label of the field is started to be dragged to change the value of it. |
| StopDragging | Method called by the application when the label of the field is stopped to be dragged to change the value of it. |
| StringToValue | Transform the string representation in the field to the right value. |
| ValueToString | Convert the value to string for visual representation. |