RPAnswerFormat

A base (abstract) class for different answer formats.

The answer format describes the format how a question can be answered. Research Package uses RPQuestionStep and RPFormStep (RPQuestionSteps on a single page) to represent a question in a survey. Each questions needs to have an associated Answer Format.

Note: This class should be an abstract class but since we need to serialize it we have to provide a constructor and factory. There's no better solution found yet. Used in RPStepResult

Inheritance

• Object
• Serializable
• RPAnswerFormat

Implementers

• RPChoiceAnswerFormat
• RPDateTimeAnswerFormat
• RPDoubleAnswerFormat
• RPFormAnswerFormat
• RPImageChoiceAnswerFormat
• RPIntegerAnswerFormat
• RPSliderAnswerFormat
• RPTextAnswerFormat

Annotations

• @JsonSerializable(includeIfNull: false, explicitToJson: true)

Constructors

RPAnswerFormat.fromJson

RPAnswerFormat.fromJson(

1. Map<String, dynamic> json

)

RPAnswerFormat

RPAnswerFormat()

The default constructor. The appropriate subclass of RPAnswerFormat should be used instead of this directly.

Properties

fromJsonFunction

1. @override

Function get fromJsonFunction

override

The function which can convert a JSON string to an object of this type.

questionType

RPQuestionType questionType

getter/setter pair

The question type of this answer. Should be implemented / overwritten in the subclasses.

Methods

toJson

1. @override

Map<String, dynamic> toJson()

override

Return a JSON encoding of this object.