RPStep class Null safety
The base class for steps which can compose a task.
Each RPStep object represents one logical piece of data entry or activity in a larger task. Whether your app is giving instructions, presenting a form or survey, obtaining consent, or running an active task, everything in the Research Package framework is a collection of steps (RPStep objects), which together form a task (an RPTask object)
- $type ↔ String?
The runtime class name (type) of this object.
Used for deserialization from JSON objects.
read / write, inherited
- fromJsonFunction → Function
The function which can convert a JSON string to an object of this type.
- hashCode → int
The hash code for this object. [...]
- identifier → String
A unique identifier of the Step. This identifier connects the Step to its
result (RPResult) object.
- jsonType → String
Return the $type to be used for JSON serialization of this class.
Default is runtimeType. Only specify this if you need another type.
- optional ↔ bool
If set to
truethe step can be skipped. In that case the result for the step will be
null.read / write
- runtimeType → Type
A representation of the runtime type of the object.
- stepWidget → Widget
The widget (UI representation) of the step. RPQuestionSteps don't have it
because their UI representation depends on the Answer Format.
Their Answer Format is assessed by RPUIQuestionStep or RPUIFormStep and
they return the corresponding UI. [...]
- text ↔ String?
The text of the Step. Different types of Steps are using the text text
read / write
- title ↔ String
The title text. Different types of Steps are using the title text differently. [...]
read / write