state_widget 1.0.1

Loading, error, empty widget

StateWidget

Chinese Document: README

The StateWidget component is a generic state layout component that can display different layouts based on various states (such as loading, load failure, empty data, etc.).

Usage

To use the StateWidget component, the following parameters need to be provided:

• stateType: The type of state layout, enumerated as StateType, including the following values:
  • loading: Loading state
  • empty: Empty data state
  • error: Load failure state
  • success: Content display state
• message: When the state layout type is empty or error, a text message can be passed to describe the specific state information.
• onRetry: When the state layout type is error, a callback function can be passed to retry loading the data.
• child: When the state layout type is success, a child component needs to be passed to display the content.

Example code:

//1. Direct usage
    StateWidget(
      stateType: stateType,
      loadingWidgetBuilder: (_, __) => const Text('Loading'),
      emptyWidgetBuilder: (message, __) => const Text('Empty'),
      errorWidgetBuilder: (message, onRetry) => TextButton(
        onPressed: onRetry,
        child: const Text("Click to Retry"),
      ),
      onRetry: () {
        //retry
        setState(() {
          stateType = StateType.loading;
        });
      },
      message: "Prompt message",
      child: const Text('Hello World'),
    );

//2. Using the extension function .state to build
     Text('Hello World').state(
        stateType: stateType,
        loadingWidgetBuilder: (_, __) => const Text('Loading'),
        emptyWidgetBuilder: (message, __) => const Text('Empty'),
        errorWidgetBuilder: (message, onRetry) => TextButton(
              onPressed: onRetry,
              child: const Text("Click to Retry"),
            ),
        onRetry: () {
          //retry
          setState(() {
            stateType = StateType.loading;
          });
        },
        message: "Prompt message");

Global Configuration

The global configuration of the StateWidget component can be set as follows:

// Global initialization of state layout
    StateWidget.config(
        errorWidgetBuilder: (String? message, VoidCallback? onRetry) => Column(
              children: [
                Text(message ?? "Error"),
                TextButton(onPressed: onRetry, child: const Text("Click to Retry"))
              ],
            ),
        emptyWidgetBuilder: (String? message, VoidCallback? onRetry) =>
            Text(message ?? "Empty"),
        loadingWidgetBuilder: (String? message, VoidCallback? onRetry) =>
            Text(message ?? "Loading"));

The StateWidgetConfig is a configuration class that includes the following parameters:

• emptyWidgetBuilder: Custom component for building the empty data state.
• errorWidgetBuilder: Custom component for building the load failure state.
• loadingWidgetBuilder: Custom component for building the loading state.

Configuration Priority

Local configuration > Global configuration