Factory
A factory that produces presenters for a given Screen. Circuit instances use the created presenter and connects it to a given Ui for the same Screen.
Factories should be simple aggregate multiple presenters for a canonical "whole screen". That is to say, they should be hand-written and aggregate all the presenters responsible for the UI visible within the surface this presents on.
Example
Consider this example of a Profile UI.
┌────────────────────┐
┌─── │ │
│ ├────────────────────┤◄──┐
│ │ X │ │
│ │ │ ProfileHeaderPresenter
│ │ Fred Rogers │ │
│ ├────────────────────┤◄──┘
│ │ ┌───────┐ ┌────┐ │
ProfilePresenterFactory │ │Message│ │Call│◄─┼─── ProfileActionsPresenter
│ │ └───────┘ └────┘ │
│ │ │
│ │ - - - - - - - - ◄─┼────┐
│ │ - - - - - - - - │ │
│ │ - - - - - - - - │ ProfileDetailsPresenter
│ │ - - - - - - - - ◄─┼────┘
└─── │ │
└────────────────────┘Content copied to clipboard
This would be represented by the following factory implementation:
class ProfilePresenter.Factory @Inject constructor(
val headerPresenter: ProfilerHeaderPresenter.Factory,
val actionsPresenter: ProfilerActionsPresenter.Factory,
val detailsPresenter: ProfilerDetailsPresenter.Factory,
val callScreenRouter: CallScreenRouter.Factory
) : Presenter.Factory {
override fun create(screen: Screen, navigator: Navigator, context: CircuitContext): Presenter<*, *>? {
return when (screen) {
is ProfileHeader -> headerPresenter.create(screen)
is ProfileActions -> actionsPresenter.create(screen, callScreenRouter.create(navigator))
is ProfileDetails -> detailsPresenter.create(screen)
else -> null
}
}
}Content copied to clipboard