feat: add stacSliverToBoxAdapter widget, parser,example and documentation by akhil-ge0rge · Pull Request #423 · StacDev/stac

akhil-ge0rge · 2026-01-17T13:40:34Z

Description

This PR introduces support for stacSliverToBoxAdapter by adding a new widget model and its corresponding parser.

Related Issues

Closes #422

Type of Change

New feature (non-breaking change which adds functionality)
Bug fix (non-breaking change which fixes an issue)
Breaking change (fix or feature that would cause existing functionality to change)
Code refactor
Build configuration change
Documentation
Chore

Summary by CodeRabbit

New Features
- Added SliverToBoxAdapter support to enable embedding box widgets inside sliver-based layouts.
Documentation
- Added a new docs page with properties, usage guidance, and an example.
Examples
- Added a gallery entry and a runnable example demonstrating SliverToBoxAdapter usage.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

…SON structure

coderabbitai · 2026-01-17T13:40:46Z

📝 Walkthrough

Walkthrough

Adds first-class SliverToBoxAdapter support: new StacSliverToBoxAdapter model with JSON (de)serialization, a parser that renders Flutter SliverToBoxAdapter, parser registration in the framework, WidgetType enum value, exports, docs, and example gallery assets.

Changes

Cohort / File(s)	Summary
Documentation `docs/docs.json`, `docs/widgets/sliver_to_box_adapter.mdx`	New docs nav entry and page for SliverToBoxAdapter under Widgets → Layout Widgets; includes props and example JSON.
Example Assets `examples/stac_gallery/assets/json/home_screen.json`, `examples/stac_gallery/assets/json/sliver_to_box_adapter_example.json`	Added gallery menu item and an example JSON demonstrating CustomScrollView → SliverPadding → SliverToBoxAdapter with a centered container.
Core Model `packages/stac_core/lib/widgets/sliver_to_box_adapter/stac_sliver_to_box_adapter.dart`, `packages/stac_core/lib/widgets/sliver_to_box_adapter/stac_sliver_to_box_adapter.g.dart`	New JsonSerializable `StacSliverToBoxAdapter` model with optional `child` and generated (de)serializers.
Widget Type & Exports `packages/stac_core/lib/foundation/specifications/widget_type.dart`, `packages/stac_core/lib/widgets/widgets.dart`	Added `sliverToBoxAdapter` enum value and exported the new model from the widgets barrel.
Parser Implementation & Exports `packages/stac/lib/src/parsers/widgets/stac_sliver_to_box_adapter/stac_sliver_to_box_adapter_parser.dart`, `packages/stac/lib/src/parsers/widgets/widgets.dart`	New `StacSliverToBoxAdapterParser` mapping JSON → model → `SliverToBoxAdapter` widget; exported from parsers barrel.
Framework Registration `packages/stac/lib/src/framework/stac_service.dart`	Registered `StacSliverToBoxAdapterParser` in the service's parsers list.

Sequence Diagram(s)

mermaid
sequenceDiagram
participant Example as Example JSON / Gallery
participant Service as StacService
participant Parser as StacSliverToBoxAdapterParser
participant Model as StacSliverToBoxAdapter
participant Flutter as SliverToBoxAdapter Widget

Example->>Service: request parse(example JSON)
Service->>Parser: delegate JSON for type "sliverToBoxAdapter"
Parser->>Model: StacSliverToBoxAdapter.fromJson(...)
Parser->>Flutter: build SliverToBoxAdapter(child: child.parse(context))
Flutter-->>Example: rendered sliver in CustomScrollView

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

feat: Introduce StacError and StacErrorWidget for enhanced error handling #364: modifies stac_service.dart; related because both change parser registration and service initialization.

Suggested reviewers

divyanshub024
Potatomonsta

Poem

🐰 A sliver cradles a tiny box so snug,
JSON whispers softly, the parser gives a hug,
Model hops in, docs and examples in tow,
From text to widget — see the sliver glow! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding the stacSliverToBoxAdapter widget with its parser, example, and documentation.
Linked Issues check	✅ Passed	The PR successfully implements the core requirement from issue `#422`: creating StacSliverToBoxAdapter with necessary supporting components (parser, type registration, model class).
Out of Scope Changes check	✅ Passed	All changes directly support the implementation of stacSliverToBoxAdapter: widget model, parser, type enum, documentation, and example assets are all in-scope.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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coderabbitai

Actionable comments posted: 2

🤖 Fix all issues with AI agents

In `@docs/widgets/sliver_to_box_adapter.mdx`:
- Around line 6-8: Update the prose describing the widget to hyphenate the
compound adjective: replace occurrences of "sliver to box adapter" with
"sliver-to-box-adapter" in the sentence that mentions "The Stac
SliverToBoxAdapter allows you to build a Flutter sliver to box adapter widget
using JSON." Ensure the phrase "sliver-to-box-adapter widget" appears
consistently (e.g., in the line referencing the official documentation) and keep
the class name "SliverToBoxAdapter" unchanged.

In `@packages/stac_core/lib/foundation/specifications/widget_type.dart`:
- Around line 210-211: The doc comment for the enum value sliverToBoxAdapter is
incorrect (it says "Sliver app bar widget"); update the comment above the
sliverToBoxAdapter enum member in widget_type.dart to accurately describe that
it represents a SliverToBoxAdapter widget (e.g., "SliverToBoxAdapter widget" or
similar). Ensure the updated comment is concise and matches the naming/style of
other enum docs in the same file.

docs/widgets/sliver_to_box_adapter.mdx

packages/stac_core/lib/foundation/specifications/widget_type.dart

akhil-ge0rge · 2026-01-17T13:53:01Z

Hi @divyanshub024 , @Potatomonsta 👋,
Please take a look. Thanks!

…json

divyanshub024 · 2026-01-27T08:57:33Z

@akhil-ge0rge PR checks are failing. Please check.

divyanshub024 · 2026-01-27T09:02:08Z

@akhil-ge0rge I'm unable to run the example app, please check it out.
Logs:

 RenderSliverPadding expected a child of type RenderSliver but received a child of type RenderErrorBox.
The relevant error-causing widget was:
    CustomScrollView CustomScrollView:file:///Users/divy/StudioProjects/stac/packages/stac/lib/src/parsers/widgets/stac_custom_scroll_view/stac_custom_scroll_view_parser.dart:23:12
════════════════════════════════════════════════════════════════════════════════
Restarted application in 1,598ms.
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ #0   LogIO.e (package:stac_logger/src/log_io.dart:25:35)
log_io.dart:25
flutter: │ #1   Log.e (package:stac_logger/src/log.dart:38:45)
log.dart:38
flutter: ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
flutter: │ ⛔ [Stac Asset Load Error] Type: "asset" - Unable to load asset: "assets/json/sliver_to_box_adapter_example.json".
flutter: │ ⛔ The asset does not exist or has empty data.
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ #0   LogIO.e (package:stac_logger/src/log_io.dart:25:35)
log_io.dart:25
flutter: │ #1   Log.e (package:stac_logger/src/log.dart:38:45)
log.dart:38
flutter: ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
flutter: │ ⛔ Stack trace:
flutter: │ ⛔ #0      PlatformAssetBundle.load.<anonymous closure> (package:flutter/src/services/asset_bundle.dart:332:13)
asset_bundle.dart:332
flutter: │ ⛔ <asynchronous suspension>
flutter: │ ⛔ #1      AssetBundle.loadString (package:flutter/src/services/asset_bundle.dart:92:27)
asset_bundle.dart:92
flutter: │ ⛔ <asynchronous suspension>
flutter: │ ⛔ #2      _FutureBuilderState._subscribe.<anonymous closure> (package:flutter/src/widgets/async.dart:641:7)
async.dart:641
flutter: │ ⛔ <asynchronous suspension>
flutter: │ ⛔ 
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

akhil-ge0rge · 2026-01-27T09:35:42Z

@akhil-ge0rge I'm unable to run the example app, please check it out. Logs:

 RenderSliverPadding expected a child of type RenderSliver but received a child of type RenderErrorBox.
The relevant error-causing widget was:
    CustomScrollView CustomScrollView:file:///Users/divy/StudioProjects/stac/packages/stac/lib/src/parsers/widgets/stac_custom_scroll_view/stac_custom_scroll_view_parser.dart:23:12
════════════════════════════════════════════════════════════════════════════════
Restarted application in 1,598ms.
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ #0   LogIO.e (package:stac_logger/src/log_io.dart:25:35)
log_io.dart:25
flutter: │ #1   Log.e (package:stac_logger/src/log.dart:38:45)
log.dart:38
flutter: ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
flutter: │ ⛔ [Stac Asset Load Error] Type: "asset" - Unable to load asset: "assets/json/sliver_to_box_adapter_example.json".
flutter: │ ⛔ The asset does not exist or has empty data.
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ #0   LogIO.e (package:stac_logger/src/log_io.dart:25:35)
log_io.dart:25
flutter: │ #1   Log.e (package:stac_logger/src/log.dart:38:45)
log.dart:38
flutter: ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
flutter: │ ⛔ Stack trace:
flutter: │ ⛔ #0      PlatformAssetBundle.load.<anonymous closure> (package:flutter/src/services/asset_bundle.dart:332:13)
asset_bundle.dart:332
flutter: │ ⛔ <asynchronous suspension>
flutter: │ ⛔ #1      AssetBundle.loadString (package:flutter/src/services/asset_bundle.dart:92:27)
asset_bundle.dart:92
flutter: │ ⛔ <asynchronous suspension>
flutter: │ ⛔ #2      _FutureBuilderState._subscribe.<anonymous closure> (package:flutter/src/widgets/async.dart:641:7)
async.dart:641
flutter: │ ⛔ <asynchronous suspension>
flutter: │ ⛔ 
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

The example app is currently failing because the supporting widget for StacSliverBoxAdapter, specifically StacSliverPadding, is part of another PR.

Since that PR hasn’t been merged yet, the example doesn’t run as expected.

Would it be okay if I remove the example from this PR and submit it in a separate PR after both PRs are merged?

divyanshub024

Thanks for this awesome PR @akhil-ge0rge. 🎉 Please check my suggestions below

docs/widgets/sliver_to_box_adapter.mdx

examples/stac_gallery/assets/json/home_screen.json

examples/stac_gallery/assets/json/sliver_to_box_adapter_example.json

packages/stac_core/lib/widgets/sliver_to_box_adapter/stac_sliver_to_box_adapter.dart

…tion

divyanshub024

Thank you for your awesome contribution @akhil-ge0rge 🎉

akhil-ge0rge added 3 commits January 17, 2026 17:50

feat: Add SliverToBoxAdapter widget and parser with documentation

d7e757a

feat: Add StacSliverToBoxAdapterParser to StacService

7fb628e

feat: Update SliverToBoxAdapter documentation and examples with new J…

50166d6

…SON structure

coderabbitai bot reviewed Jan 17, 2026

View reviewed changes

docs/widgets/sliver_to_box_adapter.mdx Outdated Show resolved Hide resolved

packages/stac_core/lib/foundation/specifications/widget_type.dart Outdated Show resolved Hide resolved

fix: Correct documentation and comments for SliverToBoxAdapter

3be776d

fix: Update subtitle for Sliver To Box Adapter widget in home_screen.…

bed3c2d

…json

divyanshub024 requested changes Jan 27, 2026

View reviewed changes

fix: Update description and examples for SliverToBoxAdapter documenta…

fab5d86

…tion

akhil-ge0rge requested a review from divyanshub024 January 27, 2026 10:52

divyanshub024 approved these changes Jan 27, 2026

View reviewed changes

divyanshub024 merged commit a9e8782 into StacDev:dev Jan 27, 2026
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This was referenced Jan 27, 2026

feat: add stacSliverPadding widget, parser,example and documentation #421

Merged

feat: add stacSliverSafeArea widget, parser,example and documentation #424

Merged

akhil-ge0rge deleted the feat-sliver-to-box-adapter branch January 28, 2026 04:36

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