Handle a screen with 3 states

SimpleThreeStateView Composable

Purpose:

The SimpleThreeStateView composable is a reusable component that simplifies the management of three common states within your UI: loading, content, and exited. It provides a structured way to handle these states and present the appropriate content to the user.

Parameters:

• modifier: A Modifier to apply to the view.

• loadingView: An optional composable function that returns a loading view to be displayed while data is being fetched.

• exitView: An optional composable function that returns an exit view to be displayed when the content is exited.

• content: A composable function that returns a SimpleStates enum value to determine the current state.

Functionality:

1. Initial State: The initial state is set to SimpleStates.CONTENT.

2. State Updates: The content function is called to determine the current state.

3. State Rendering: Based on the current state, the appropriate view is displayed:

   • SimpleStates.LOADING: Displays the loadingView if provided, or a default loading view.

   • SimpleStates.CONTENT: Calls the content function again to determine the content to be displayed.

   • SimpleStates.EXITED: Displays the exitView if provided, or a default loading view.

Scenario: Form Page, Loading, and Result

In the provided scenario, the SimpleThreeStateView can be used to manage the different states of a form submission process:

1. Initial State (Form Page): The initial state is SimpleStates.CONTENT, displaying the form.

2. Loading State (Posting to Server): When the user submits the form, the state is set to SimpleStates.LOADING, displaying a loading indicator.

3. Final State (Result from Server): Once the server response is received, the state is set to either SimpleStates.CONTENT (if the submission was successful) or SimpleStates.EXITED (if an error occurred).

Example Usage:

Kotlin

SimpleThreeStateView(
    content = {
        if (isFormSubmitted) {
            SimpleStates.LOADING
        } else {
            FormView()
        }
    },
    loadingView = { CircularProgressIndicator() },
    exitView = { Text(text = "Submission failed") }
)

Use code with caution.

Key Benefits:

• Simplified State Management: Handles loading, content, and exited states in a structured way.

• Customizable Views: Allows you to provide custom loading, content, and exit views.

• Reusable Component: Can be reused in multiple parts of your application.

• Clear Structure: Encourages a consistent approach to managing view states.

By using SimpleThreeStateView, you can streamline your UI development and improve the user experience by providing clear feedback and handling different states effectively.