![]() This class controls how the component would be deserialized into a corresponding model class. ![]() Let's show it on the CheckBox example: Parser Parsers and Models then need to be registered when you are building the form as you can see in the code above. To implement a custom component you need to provide 3 classes: Parser, Model, and Renderer. For those reasons I would recommend for each application to write its custom set of components to have complete control over each property. In the case of this complex high-level component you let the client application completely control the look of the final widget. I think that may change in the future.Īlso when designing components, you can always choose between low-level components like Label or high-level component like UserProfile. ![]() The flutter_dynamic_forms_components package contains only a set of basic components related to a simple form application.īecause of some requirements on my old app, not all components naming directly corresponds to the flutter widgets. To submit the form you usually want to serialize this list and send it back to your server. Each item contains the id of the source element, property name, and property value. In default components, those are the properties that are expected to be changed by a user. It contains a list of all the properties which were marked as a mutable in a component parser definition. Use your own dispatcher handler if you need to send custom events (like a button click), but you should always let form manager handle the ChangeValueEvent: When dispatcher parameter is not provided, only events of type ChangeValueEvent are processed and delegated directly to the FormManager instance causing changes of the property values. It allows you to handle events derived from FormElementEvent produced in your render classes. The last optional parameter is a dispatcher. The word reactive means that each component will listen to the changes in the form model property and will update itself. In the example above, we use a set of predefined renderers. This widget also takes a list of renderers that controls how each model would be translated to the Flutter widget. You can provide your FormManager as a type: FormRenderer(.) and it will be automatically resolved from previously defined FormProvider or you can pass specific FormManager instance into the FormRenderer constructor. FormManager : myFormManagerInstance, // this is optional, can be resolved from the FormProviderĭispatcher : _onFormElementEvent, // optional, when omitted, it will delegate all change events to from manager ![]()
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