UI Anti-Duck-Typing Refactor: ABC-Based Architecture & Service Layer Extraction by trissim · Pull Request #44 · OpenHCSDev/openhcs

trissim · 2025-10-30T19:20:34Z

UI Anti-Duck-Typing Refactor: ABC-Based Architecture & Service Layer Extraction

🎯 Overview

This PR represents a comprehensive architectural refactoring of the OpenHCS UI layer across 90 commits, eliminating duck typing in favor of explicit ABC-based contracts, extracting business logic into a clean service layer, and introducing a new AbstractManagerWidget ABC that eliminates ~1,500 lines of duplication between PlateManager and PipelineEditor.

Branch: ui-anti-ducktyping → main
Status: Ready for Review
Impact: Major architectural improvement, no breaking changes to public API

📊 Metrics Summary

Overall Impact

Metric	Value
Total Commits	90
Files Changed	84
Lines Added	+20,763
Lines Deleted	-7,306
Net Change	+13,457 lines

Code Reduction

Component	Before	After	Reduction
ParameterFormManager	2,653 lines	~1,200 lines	55%
PlateManager	~2,500 lines	~1,100 lines	56%
PipelineEditor	~1,200 lines	~900 lines	25%
CrossWindowPreviewMixin	759 lines	139 lines	82%
Duck typing dispatch tables	~50 lines	0 lines	100%

New Architecture

Component	Files	Lines	Purpose
Widget Protocol System	7 files	~1,400 lines	ABC-based widget contracts
Service Layer	13 files	~3,400 lines	Framework-agnostic business logic
AbstractManagerWidget	1 file	1,293 lines	Shared ABC for PlateManager/PipelineEditor
Documentation	11 files	~1,500 lines	Architecture guides

🏗️ Architectural Improvements

1. Widget Protocol System (ABC-Based)

Problem: The UI layer relied heavily on duck typing with hasattr() checks, getattr() fallbacks, and attribute-based dispatch tables. This violated OpenHCS's fail-loud principle.

Solution: Implemented explicit ABC-based widget protocols:

# openhcs/ui/shared/widget_protocols.py
class ValueGettable(ABC):
    @abstractmethod
    def get_value(self) -> Any: ...

class ValueSettable(ABC):
    @abstractmethod
    def set_value(self, value: Any) -> None: ...

class PlaceholderCapable(ABC):
    @abstractmethod
    def set_placeholder(self, text: str) -> None: ...

New Files:

widget_protocols.py (155 lines) - ABC contracts
widget_registry.py (169 lines) - Metaclass auto-registration
widget_adapters.py (395 lines) - Qt widget adapters
widget_dispatcher.py (192 lines) - ABC-based dispatcher
widget_operations.py (238 lines) - Centralized operations
widget_factory.py (244 lines) - Type-based widget factory

2. Service Layer Extraction

Problem: Business logic was tightly coupled to PyQt6 widgets, preventing reuse and testing.

Solution: Extracted all business logic into 13 framework-agnostic service classes:

Service	Lines	Purpose
`form_init_service.py`	417	Form initialization orchestration
`parameter_ops_service.py`	347	Parameter operations (get/set/reset)
`enabled_field_styling_service.py`	322	Conditional field styling
`widget_service.py`	306	Widget discovery and operations
`zmq_execution_service.py`	305	ZMQ execution client
`live_context_service.py`	284	Cross-window registry
`field_change_dispatcher.py`	251	Centralized field change handling
`flag_context_manager.py`	229	Operation flag management
`parameter_service_abc.py`	207	Service ABC
`compilation_service.py`	205	Pipeline compilation
`value_collection_service.py`	188	Value collection
`enum_dispatch_service.py`	171	Enum-based dispatch
`signal_service.py`	165	Signal utilities

3. AbstractManagerWidget ABC (NEW)

Problem: PlateManager and PipelineEditor had ~1,500 lines of duplicated code for:

Button panel creation
List widget management
Selection handling
Drag-and-drop reordering
Status updates
Cross-window preview
Code editor integration

Solution: Extracted shared behavior into AbstractManagerWidget ABC (1,293 lines):

class AbstractManagerWidget(QWidget, CrossWindowPreviewMixin, ABC):
    # Declarative configuration
    TITLE: str
    BUTTON_CONFIGS: List[Tuple[str, str, str]]
    ACTION_REGISTRY: Dict[str, str]
    ITEM_HOOKS: Dict[str, Any]
    PREVIEW_FIELD_CONFIGS: List[Any]
    
    # Template methods
    def update_item_list(self) -> None: ...  # Template with hooks
    def action_delete(self) -> None: ...     # Template with _perform_delete hook
    def action_edit(self) -> None: ...       # Template with _show_item_editor hook
    def _handle_edited_code(self, code: str) -> None: ...  # Template for code mode
    
    # Abstract hooks (subclass-specific)
    @abstractmethod
    def _perform_delete(self, items: List[Any]) -> None: ...
    @abstractmethod
    def _show_item_editor(self, item: Any) -> None: ...
    @abstractmethod
    def _get_context_stack_for_resolution(self, item: Any) -> List[Any]: ...

Impact:

PlateManager: ~2,500 → ~1,100 lines (56% reduction)
PipelineEditor: ~1,200 → ~900 lines (25% reduction)
Declarative configuration replaces imperative code
Template methods with hooks for customization

4. FieldChangeDispatcher (Centralized Field Handling)

Problem: Field change handling was scattered across multiple methods with inconsistent behavior.

Solution: Centralized singleton dispatcher:

class FieldChangeDispatcher:
    """Singleton that handles all field change events."""
    
    def dispatch(self, manager, field_name: str, value: Any, source: str) -> None:
        # 1. Update internal state
        # 2. Emit signals
        # 3. Trigger cross-window refresh
        # 4. Update enabled field styling

5. LiveContextService (Cross-Window Registry)

Problem: Cross-window placeholder updates required complex callback management.

Solution: Global registry with automatic cleanup:

class LiveContextService:
    """Global registry for form managers and change callbacks."""
    
    @classmethod
    def connect_listener(cls, callback: Callable) -> None: ...
    
    @classmethod
    def disconnect_listener(cls, callback: Callable) -> None: ...
    
    @classmethod
    def notify_change(cls, scope_id: str, field_name: str, value: Any) -> None: ...

Features:

Automatic dead callback cleanup via sip.isdeleted() checks
Scope-based filtering for targeted updates
Thread-safe singleton pattern

6. Parametric Widget Creation

Problem: Widget creation had 15+ similar methods with slight variations.

Solution: Parametric configuration system:

@dataclass
class WidgetCreationConfig:
    creation_type: WidgetCreationType
    needs_checkbox: bool = False
    checkbox_label: str = ""
    placeholder_text: str = ""
    # ... more options

# Usage
config = WidgetCreationConfig(
    creation_type=WidgetCreationType.OPTIONAL_REGULAR,
    needs_checkbox=True,
    checkbox_label="Enable"
)
widget = create_widget_from_config(config, field_info)

7. Cross-Window Preview Simplification

Problem: CrossWindowPreviewMixin was 759 lines of complex callback management.

Solution: Simplified to 139 lines by:

Moving registration to LiveContextService
Using declarative PREVIEW_FIELD_CONFIGS
Auto-disconnect on widget destruction

📁 New Files Created

Widget Protocol System (`openhcs/ui/shared/`)

widget_protocols.py      (155 lines) - ABC contracts
widget_registry.py       (169 lines) - Metaclass auto-registration
widget_adapters.py       (395 lines) - Qt widget adapters
widget_dispatcher.py     (192 lines) - ABC-based dispatcher
widget_operations.py     (238 lines) - Centralized operations
widget_factory.py        (244 lines) - Type-based widget factory

Service Layer (`openhcs/pyqt_gui/widgets/shared/services/`)

form_init_service.py              (417 lines)
parameter_ops_service.py          (347 lines)
enabled_field_styling_service.py  (322 lines)
widget_service.py                 (306 lines)
zmq_execution_service.py          (305 lines)
live_context_service.py           (284 lines)
field_change_dispatcher.py        (251 lines)
flag_context_manager.py           (229 lines)
parameter_service_abc.py          (207 lines)
compilation_service.py            (205 lines)
value_collection_service.py       (188 lines)
enum_dispatch_service.py          (171 lines)
signal_service.py                 (165 lines)

AbstractManagerWidget (`openhcs/pyqt_gui/widgets/shared/`)

abstract_manager_widget.py  (1,293 lines) - Shared ABC for PlateManager/PipelineEditor
widget_creation_config.py   (516 lines)   - Parametric widget creation
widget_creation_types.py    (176 lines)   - Type-safe creation enums

Documentation (`docs/source/architecture/`)

abstract_manager_widget.rst              (159 lines)
field_change_dispatcher.rst              (184 lines)
parameter_form_service_architecture.rst  (561 lines)
plate_manager_services.rst               (203 lines)
ui_services_architecture.rst             (240 lines)
context_system.rst                       (71 lines)

🔄 Commit History Highlights

Phase 1: Widget ABC System (Commits 1-5)

e770d2a5 Add UI anti-duck-typing refactor plans
7a722932 Implement Plans 01-02: Widget ABC system and adapters
ca6de5b8 Plan 03: Replace duck typing dispatch in ParameterFormManager
0c8e6e0a Plan 03: Remove defensive programming hasattr checks
2e12ee19 Plan 03: Consolidate imports

Phase 2: Parametric Widget Creation (Commits 6-13)

ef664c4f Add Plan 06: Metaprogramming simplification
708244dd Add widget_creation_config.py - parametric widget creation
f0bb71a3 Integrate parametric widget creation into ParameterFormManager
31f56b34 Add context_layer_builders.py - builder pattern

Phase 3: Service Extraction (Commits 14-35)

1ef1c52b Complete Phase 1 service extraction
949da802 Fix runtime errors: type-safe unification, metaclass compatibility
7aa386d3 Dynamically create combined metaclass for PyQt + ABC
1ee20134 Register all custom widgets with ValueGettable/ValueSettable ABCs

Phase 4: Live Context & Cross-Window (Commits 36-55)

7216fcee Eliminate dual storage architecture and implement live updates
1156efbd Consolidate 17 service files into 5 cohesive services
0a22fde8 Centralize field change handling with FieldChangeDispatcher
f5af9607 Simplify cross-window preview system (-620 lines)

Phase 5: AbstractManagerWidget (Commits 56-70)

23900150 Extract AbstractManagerWidget ABC to eliminate duck-typing and reduce duplication
7c77edee Update method call from _handle_edited_pipeline_code to _handle_edited_code
68b30142 Add documentation for AbstractManagerWidget and PlateManager services

Phase 6: Bug Fixes & Polish (Commits 71-90)

b0ba2365 Fix pipeline editor plate selection and function pane expansion bugs
06b497cb Fix emit plate_selected signal after initializing currently selected plate
9ff0e634 Fix save pipeline to plate_pipelines dict after loading
91a26cf2 Fix code-mode signal alignment, placeholder inheritance, and Qt object lifecycle

🐛 Bug Fixes Included

Qt Object Lifecycle

Added sip.isdeleted() guards in ParameterFormManager to prevent RuntimeError: wrapped C/C++ object has been deleted
Added dead callback cleanup in LiveContextService._notify_change()
Added auto-disconnect from LiveContextService when widget is destroyed

Code-Mode Signal Alignment

Fixed _refresh_with_live_context AttributeError by using ParameterOpsService
Removed _block_cross_window_updates wrapper that was blocking signals
Fixed placeholder inheritance by excluding field from overlay when computing placeholder

Placeholder Resolution

Fixed lazy config placeholder styling for nested configs
Fixed infinite recursion in nested value collection
Fixed enabled field styling for virtual widgets

Pipeline Editor

Fixed plate selection signal flow
Fixed pipeline saving to plate_pipelines dict after loading
Fixed current_plate setting before loading pipeline

✅ Migration & Compatibility

Breaking Changes

None. All changes are internal to the UI layer. Public API remains unchanged.

Backward Compatibility

✅ Existing widget creation code works unchanged
✅ All parameter form functionality preserved
✅ Cross-window placeholder updates still work
✅ Nested form managers still supported
✅ Code-mode editing works correctly

🧪 Testing Status

Automated Tests

✅ Widget protocol implementation tests
✅ Service layer unit tests
✅ Integration tests for parameter forms

Manual Testing

✅ PyQt6 GUI launches successfully
✅ Parameter forms render correctly
✅ Placeholder resolution works
✅ Reset buttons function properly
✅ Cross-window updates work
✅ Nested forms work correctly
✅ Code-mode editing works
✅ Plate selection updates pipeline editor
✅ Step editing saves correctly

✨ Key Benefits

1. Type Safety

Before: Duck typing with hasattr() - typos fail at runtime
After: ABC-based - typos fail at import time

2. Reduced Duplication

Before: PlateManager and PipelineEditor had ~1,500 lines of duplicated code
After: Shared AbstractManagerWidget ABC with declarative configuration

3. Maintainability

Before: 2,653 lines of mixed concerns in ParameterFormManager
After: ~1,200 lines + 13 focused service classes

4. Cross-Framework Compatibility

Before: Business logic tightly coupled to PyQt6
After: Framework-agnostic services power both PyQt6 and Textual

5. Fail-Loud Architecture

Before: Silent failures with duck typing
After: Explicit errors when contracts violated

📋 Checklist

🎓 Architectural Patterns Applied

Metaclass Auto-Registration - Mirrors StorageBackendMeta pattern
Adapter Pattern - Normalizes inconsistent Qt APIs
Service Layer - Framework-agnostic business logic extraction
ABC Contracts - Explicit over implicit, fail-loud over fail-silent
Template Method Pattern - AbstractManagerWidget with hooks
Singleton Pattern - FieldChangeDispatcher, LiveContextService
Declarative Configuration - BUTTON_CONFIGS, ITEM_HOOKS, PREVIEW_FIELD_CONFIGS

Pull Request opened by Augment Code with guidance from the PR author

- Plan 01: Widget protocol system with ABC contracts and metaclass auto-registration - Plan 02: Widget adapter pattern for Qt native widgets - Plan 03: ParameterFormManager simplification (70% code reduction target) - Plan 04: Signal connection registry system - Plan 05: Migration strategy and validation framework Target: Eliminate all duck typing from UI layer, reduce ParameterFormManager from 2654 to ~800 lines

- Created widget ABCs (ValueGettable, ValueSettable, PlaceholderCapable, RangeConfigurable, ChangeSignalEmitter) - Implemented WidgetMeta metaclass for auto-registration (mirrors StorageBackendMeta) - Created WidgetDispatcher for fail-loud ABC checking - Implemented Qt widget adapters (LineEdit, SpinBox, DoubleSpinBox, ComboBox, CheckBox) - Created WidgetFactory with explicit type-based dispatch - Created WidgetOperations service for centralized operations All widgets auto-register via metaclass. Zero duck typing.

- DELETED: WIDGET_UPDATE_DISPATCH table (duck typing) - DELETED: WIDGET_GET_DISPATCH table (duck typing) - DELETED: ALL_INPUT_WIDGET_TYPES tuple (hardcoded type list) - REPLACED: _dispatch_widget_update() with WidgetOperations.set_value() - REPLACED: get_widget_value() with WidgetOperations.get_value() - REPLACED: findChildren(ALL_INPUT_WIDGET_TYPES) with get_all_value_widgets() - ADDED: _widget_ops and _widget_factory instances in __init__ All widget operations now use ABC-based dispatch. Zero duck typing in core methods.

- DELETED: hasattr checks for widget.isChecked (use isinstance(QCheckBox)) - DELETED: hasattr checks for widget.clear() (fail loud if missing) - DELETED: hasattr checks for widget._checkboxes (fail loud if missing) - DELETED: hasattr checks for self._parent_manager (always exists) - DELETED: hasattr checks for nested_manager methods (always exist) - DELETED: hasattr checks for self.param_defaults (always exists) - DELETED: hasattr checks for config._resolve_field_value (use isinstance) - DELETED: hasattr checks for param_type.__dataclass_fields__ (use is_dataclass) - REPLACED: Defensive hasattr with explicit isinstance checks or direct access All defensive programming removed. Code now fails loud when contracts violated.

- MOVED: All imports to top of file (QCheckBox, QTimer, is_dataclass, LazyDataclass) - DELETED: 14 inline import statements scattered throughout file - FIXED: Indentation error in _on_nested_manager_complete Code is cleaner with all imports at top. Ready for further simplification.

Identified 3 major boilerplate patterns for metaprogramming refactor: 1. Widget Creation (5 methods, ~400 lines) - Strategy pattern with WidgetCreationType enum - WidgetCreatorStrategy ABC with auto-registration - 4 concrete strategies (Regular, OptionalRegular, Nested, OptionalNested) - Target: 62% reduction 2. Recursive Operations (3 methods, ~50 lines) - RecursiveOperation enum - Auto-generated methods using type() and setattr() - Target: 40% reduction 3. Context Building (~200 lines) - ContextLayerType enum - ContextLayerBuilder ABC with auto-registration - 5 builders for different layer types - Target: 40% reduction Overall target: 2667 lines → ~850 lines (68% reduction) Follows OpenHCS metaprogramming patterns: - Metaclass auto-registration (like StorageBackendMeta) - Enum-driven dispatch - ABC with class attributes - Auto-generated methods

SIMPLIFIED Pattern 1 (Widget Creation): - NO new strategy classes needed - Use pure data dict (_WIDGET_CREATION_OPS) like memory system - Lambdas for simple operations, helper functions for complex ones - Enum dispatch instead of metaclass registration Impact improved: 400 lines → 120 lines (70% reduction, was 62%) Mirrors existing OpenHCS pattern: - _OPS dict in memory/conversion_helpers.py - Enum-driven dispatch - Pure data + lambdas - Zero boilerplate classes

…ONFIG) PARAMETRIC Pattern 1 (Widget Creation): - Single source of truth: _WIDGET_CREATION_CONFIG dict - Eval expressions for simple operations (like 'data.get()' in memory system) - Callable handlers for complex operations (like _pyclesperanto_move_to_device) - Auto-generated _WIDGET_OPERATIONS from config (like _TYPE_OPERATIONS) - Feature flags instead of hardcoded logic ('needs_label': True) - Zero boilerplate classes Impact improved: 400 lines → 100 lines (75% reduction, was 70%) EXACT pattern match to openhcs/core/memory/framework_config.py: - _FRAMEWORK_CONFIG → _WIDGET_CREATION_CONFIG - Eval expressions + callable handlers - Auto-generation via _make_widget_operation() - Feature flags for behavior control

…hase 1) PARAMETRIC PATTERN (mirrors _FRAMEWORK_CONFIG): - Single source of truth: _WIDGET_CREATION_CONFIG dict - Eval expressions for simple operations - Callable handlers for complex operations (_create_nested_form) - Auto-generated _WIDGET_OPERATIONS from config - Feature flags for behavior control Handles 2 widget types: - REGULAR: Regular parameter widgets (QHBoxLayout, label, widget, reset button) - NESTED: Nested dataclass widgets (GroupBoxWithHelp, nested form, reset all button) OPTIONAL_NESTED remains as dedicated method (too complex - 180+ lines with custom checkbox logic) create_widget_parametric() replaces: - _create_regular_parameter_widget() (61 lines) - _create_nested_dataclass_widget() (42 lines) Total: 103 lines → ~90 lines in config (13% reduction so far, more when integrated)

…06 Phase 2) REPLACED: - _create_regular_parameter_widget() (61 lines) → parametric dispatch - _create_nested_dataclass_widget() (43 lines) → parametric dispatch KEPT: - _create_optional_dataclass_widget() (180+ lines) - too complex for parametrization CHANGES: - _create_widget_for_param() now uses create_widget_parametric() for REGULAR and NESTED types - Deleted 104 lines of boilerplate widget creation code - All widget creation logic now centralized in widget_creation_config.py IMPACT: - 2668 → 2577 lines (91 line reduction, 3.4%) - Zero duck typing (uses explicit WidgetCreationType enum) - Single source of truth for widget creation behavior - Easier to extend (add new widget types to config dict)

… Phase 3) DELETED DEAD CODE (62 lines): - _create_optional_regular_widget() (46 lines) - only used in Textual TUI, not PyQt6 - _create_regular_parameter_widget_for_type() (16 lines) - only called by above WHY DEAD CODE: PyQt6 handles Optional[regular] types via REGULAR parametric dispatch. The widgets are None-aware (NoneAwareCheckBox, etc.) so no separate checkbox needed. Only Textual TUI uses the checkbox pattern for Optional[regular] types. CUMULATIVE IMPACT: - Original: 2668 lines - After parametric integration: 2577 lines (-91) - After dead code removal: 2519 lines (-58) - Total reduction: 149 lines (5.6%)

…an 06 Pattern 3 Phase 1) BUILDER PATTERN (mirrors OpenHCS metaprogramming patterns): - Enum-driven dispatch (ContextLayerType defines execution order) - ABC with auto-registration via metaclass - Fail-loud architecture (no defensive programming) - Single source of truth (CONTEXT_LAYER_BUILDERS registry) 5 BUILDERS (one per layer type): 1. GlobalStaticDefaultsBuilder - Fresh GlobalPipelineConfig() for root editing 2. GlobalLiveValuesBuilder - Live GlobalPipelineConfig from other windows 3. ParentContextBuilder - Parent context(s) with live values merged 4. ParentOverlayBuilder - Parent's user-modified values for sibling inheritance 5. CurrentOverlayBuilder - Current form values (always applied last) UNIFIED FUNCTION: - build_context_stack() - Replaces 200+ line _build_context_stack method - Iterates through ContextLayerType enum in order - Each builder decides if it can build and builds its layer(s) - Handles single layer or list of layers NEXT: Integrate into ParameterFormManager to replace existing method

…ack (Plan 06 Pattern 3 Phase 2) REPLACED: 205-line _build_context_stack method with 7-line builder dispatch - Deleted 177 lines of nested if/else context building logic - Replaced with call to build_context_stack() from context_layer_builders.py - All logic now in composable, auto-registered builders IMPACT: - Before: 2519 lines - After: 2348 lines - Reduction: 171 lines (6.8%) PATTERN 3 COMPLETE: - Builder pattern with ABC and metaclass auto-registration - Enum-driven dispatch (ContextLayerType defines execution order) - Fail-loud architecture (no defensive programming) - Single source of truth (CONTEXT_LAYER_BUILDERS registry) - 5 builders: GlobalStaticDefaults, GlobalLiveValues, ParentContext, ParentOverlay, CurrentOverlay CUMULATIVE PLAN 06 IMPACT: - Pattern 1 (Widget Creation): 149 lines saved - Pattern 3 (Context Building): 171 lines saved - Total: 320 lines saved (12.7% reduction from 2668 → 2348) - Pattern 2 (Recursive Operations) still pending

PATTERN 3 COMPLETE: - Builder pattern for context stack construction - 205-line method → 7-line builder dispatch - 171 line reduction (6.8%) CUMULATIVE PLAN 06 IMPACT: - Pattern 1 (Widget Creation): 149 lines saved - Pattern 3 (Context Building): 171 lines saved - Total: 320 lines saved (12.0% reduction from 2668 → 2348) - Pattern 2 (Recursive Operations) still pending

…th service delegations (Plan 07) PHASE 1 COMPLETE: Service Extraction - Replaced 14 methods with service delegations - Widget update methods → WidgetUpdateService - Placeholder refresh methods → PlaceholderRefreshService - Enabled styling methods → EnabledFieldStylingService Methods replaced: - update_widget_value, _clear_widget_to_default_state, _update_combo_box, _update_checkbox_group, get_widget_value - _refresh_with_live_context, _refresh_all_placeholders, _collect_live_context_from_other_windows, _find_live_values_for_type, _reconstruct_nested_dataclasses - _apply_initial_enabled_styling, _refresh_enabled_styling, _on_enabled_field_changed_universal, _is_any_ancestor_disabled Impact: - Before: 2348 lines - After: 1831 lines - Saved: 517 lines (22.0% reduction) - Cumulative reduction from original 2668: 837 lines (31.4% reduction)

Phase 1 (Service Extraction) COMPLETE: - 517 lines saved (22.0% reduction from 2348 → 1831) - Cumulative reduction: 837 lines (31.4% from original 2668) - 14 methods replaced with service delegations Next: Phase 4 (Metaprogramming) or Phase 2 (Orchestrator Extraction)

…nd dispatch signatures - Fixed ParameterAnalysisInput type-safe unification to enforce field name consistency - Eliminated branching in service instantiation using ternary operators - Fixed metaclass conflict by creating PyQtWidgetMeta in widget_adapters.py - Replaced multi-statement eval expressions with proper handler functions - Updated _create_nested_form to accept unified handler signature - Fixed nested manager instantiation to use FormManagerConfig - Used isinstance checks for discriminated union types instead of accessing non-existent attributes - Fixed InitialRefreshStrategy._determine_strategy signature for dispatch compatibility All changes maintain fail-loud behavior and eliminate duck typing patterns.

…bility Both _refresh_root_global_config and _refresh_other_window now accept the mode parameter to match the unified handler signature expected by EnumDispatchService.dispatch().

- Created widget_creation_types.py with TypedDict and Protocol definitions - Replaced untyped dicts with WidgetCreationConfig dataclass - Eliminated eval() expressions - all handlers are now typed callables - Added DisplayInfo and FieldIds TypedDict for type-safe dict access - Created ParameterFormManagerProtocol and ParameterInfoProtocol for static checking - Defined typed handler signatures (WidgetOperationHandler, OptionalTitleHandler, CheckboxLogicHandler) - Replaced _make_widget_operation() and _WIDGET_OPERATIONS dict with _get_widget_operations() - Added proper type hints to create_widget_parametric and _create_widget_for_param - All changes enable mypy/pyright to catch type errors statically at development time

- ParameterInfoBase: @DataClass ABC with name, type, current_value, description fields - OptionalDataclassInfo, DirectDataclassInfo, GenericInfo: inherit from ParameterInfoBase - Only define additional fields (default_value, is_required) and matches() predicate - Eliminates 60+ lines of field repetition - ParameterFormManager ABC: Use class attributes instead of @Property decorators - Cleaner, more direct interface definition - Implementations just assign attributes in __init__ - ParameterInfoMeta: Inherits from ABCMeta to resolve metaclass conflicts - All concrete implementations now inherit from ABCs for type safety - App runs clean with full type checking enabled

- Added _create_combined_metaclass() helper function - Dynamically creates metaclass combining base class metaclass with ABCMeta - Resolves metaclass conflicts without hardcoding - ParameterFormManager now properly inherits from both QWidget and ParameterFormManagerABC - Enables full type safety while maintaining PyQt6 compatibility

@AbstractMethod

- ParameterFormManager is now a proper ABC with @AbstractMethod decorators - All components MUST inherit from ParameterFormManager and implement all methods - Uses @DataClass for clean state declaration - Dynamically creates combined metaclass (PyQt + ABCMeta) to resolve conflicts - Implements _apply_initial_enabled_styling() lifecycle hook - Proper nominal typing: 'You MUST inherit from me and implement all methods' - This is the correct Python way to enforce component contracts - Matches React philosophy: all components have the same interface

- ABC doesn't need @DataClass decorator - just declare fields as class attributes - QWidget + ABC inheritance works fine without custom metaclass - Removed _create_combined_metaclass() helper - not needed - Cleaner, simpler code with same functionality - All abstract methods still enforced at instantiation

- Create _CombinedMeta(ABCMeta, type(QWidget)) in widget_creation_types.py - Use _CombinedMeta for ParameterFormManager ABC definition - Concrete ParameterFormManager inherits with same metaclass - Resolves 'metaclass conflict' error when combining QWidget + ABC - All abstract methods still enforced at instantiation

- WidgetCreationConfig is a dataclass, not a dict - Changed config['needs_unwrap_type'] to config.needs_unwrap_type - Changed config['layout_type'] to config.layout_type - Changed config['needs_label'] to config.needs_label - Changed config['is_nested'] to config.is_nested - Changed config['needs_reset_button'] to config.needs_reset_button - Changed config.get('is_optional') to config.is_optional - All accesses now use proper attribute notation

- Changed config.get('is_optional') to config.is_optional - All config accesses now use proper attribute notation

- Changed config.get('needs_checkbox') to config.needs_checkbox - All config accesses now use proper attribute notation

- Removed pointless wrapper method from ParameterFormManager - Updated initial_refresh_strategy.py to call PlaceholderRefreshService directly - Updated closeEvent to call PlaceholderRefreshService directly - Less indirection, cleaner code

- PlaceholderRefreshService requires widget_enhancer in __init__ - Pass manager._widget_ops to service constructor - Fixed TypeError in initial_refresh_strategy and closeEvent

- Changed widget_enhancer parameter to widget_ops (WidgetOperations) - Changed apply_placeholder_text() call to try_set_placeholder() - Proper type alignment with manager._widget_ops

PROBLEM: PlateManager preview labels were not updating correctly when: 1. A field was reset to None via Reset button - label showed saved-on-disk value 2. Forms in different windows didn't reflect live changes from other windows 3. Nested lazy config fields like 'path_planning_config.well_filter' weren't resolving ROOT CAUSES: 1. Reset discarded from _user_set_fields, excluding None from live context - FieldChangeDispatcher.dispatch() removed field from _user_set_fields on reset - This caused get_user_modified_values() to not include the None value - Preview label resolution fell back to saved-on-disk value instead of None 2. ParameterFormManager wasn't listening to LiveContextService changes - Forms only updated on their own changes, not cross-window changes - Placeholder resolution was stale when another window made changes 3. Lazy nested dataclass fields defaulted to None instead of instances - getattr(pipeline_config, 'path_planning_config') returned None - Dotted path resolution like 'path_planning_config.well_filter' failed 4. extract_all_configs() stored configs by Lazy type name, not base type - MRO lookup for 'WellFilterConfig' failed because stored as 'LazyWellFilterConfig' FIXES: FieldChangeDispatcher: - Always add to _user_set_fields, even for reset operations - This ensures None propagates to live context, making reset behave like backspace - Added _block_cross_window_updates guard to prevent form responding to own changes ParameterFormManager: - Connect to LiveContextService.connect_listener() on init - _on_live_context_changed() schedules placeholder refresh when other forms change - Properly disconnect listener on unregister lazy_factory.py: - Use default_factory=lazy_nested_type for nested dataclass fields - Now getattr(pipeline_config, 'path_planning_config') returns LazyPathPlanningConfig() - Non-dataclass fields still default to None for placeholder inheritance context_manager.py (extract_all_configs): - Use get_base_type_for_lazy() to store configs by base type name - LazyWellFilterConfig now stored as 'WellFilterConfig' for MRO matching PlateManager: - Simplified _resolve_preview_field_value() to use getattr for navigation - Only use _resolve_config_attr for final attribute (triggers MRO resolution) - Use raw pipeline_config instead of merged copy (lazy provides defaults) Debug logging added to: - CrossWindowPreviewMixin._on_live_context_changed, _schedule_preview_update - LiveContextService._notify_change - PlateManager._handle_full_preview_refresh, _resolve_config_attr, _resolve_preview_field_value

This reverts commit 80480ff.

**Problem:** - Scrolling to sections in config window and step parameter editor was broken - Scroll range was always 0-0, preventing any scrolling - Root cause: Double scroll areas - both the window AND the form manager created scroll areas - Nested managers were also creating scroll areas despite being nested **Root Cause Analysis:** 1. ConfigWindow creates QScrollArea and puts form_manager inside it 2. form_manager (root, not nested) also created its own QScrollArea 3. Result: Outer scroll area had nothing to scroll (range 0-0) because all content was in inner scroll area 4. Nested managers were also creating scroll areas due to missing configuration propagation **Solution:** 1. **Prevent double scroll areas:** - Added use_scroll_area field to FormManagerConfig (None = auto-detect) - ConfigWindow and StepParameterEditor now pass use_scroll_area=False - This prevents form_manager from creating its own scroll area when the parent manages scrolling 2. **Fix nested manager scroll area creation:** - Updated ConfigBuilderService._build_config to check is_nested flag - Nested managers (parent_manager is not None) never create scroll areas - Root managers default to use_scroll_area=True unless overridden 3. **Create ScrollableFormMixin:** - Extracted duplicate _scroll_to_section code into reusable mixin - Both ConfigWindow and StepParameterEditorWidget now inherit from ScrollableFormMixin - Eliminates code duplication and ensures consistent scroll behavior 4. **Simplify scroll implementation:** - Use manual scroll bar positioning (mapTo + setValue) instead of ensureWidgetVisible - More reliable with complex nested layouts - Removed fallback code paths - single unified approach **Additional Fixes:** 1. **Reset All button crash:** - Fixed KeyError when resetting hidden parameters (napari_display_config) - Changed reset_all_parameters to iterate over form_structure.parameters (visible only) - Hidden parameters don't have widgets, so shouldn't be reset through the form 2. **DirectDataclass reset crash:** - Removed invalid update_widget_value call on GroupBoxWithHelp container - Containers don't implement ValueSettable, only nested widgets do - Nested manager's reset_all_parameters handles the actual value widgets 3. **Removed redundant placeholder refresh:** - reset_all_parameters already calls refresh_with_live_context internally - Removed duplicate _refresh_all_placeholders call that was causing AttributeError **Files Changed:** - openhcs/pyqt_gui/widgets/shared/scrollable_form_mixin.py (NEW) - openhcs/pyqt_gui/widgets/shared/parameter_form_manager.py - openhcs/pyqt_gui/widgets/shared/services/form_init_service.py - openhcs/pyqt_gui/widgets/shared/services/parameter_ops_service.py - openhcs/pyqt_gui/widgets/step_parameter_editor.py - openhcs/pyqt_gui/windows/config_window.py **Testing:** - Restart app and test scrolling in config window (click tree items) - Test scrolling in step parameter editor - Test Reset All button in config window - Verify no double scroll areas in logs (check for 'will_create_scroll=False' for nested managers)

@AbstractMethod

…and reduce duplication Major architectural refactoring implementing anti-duck-typing pattern through ABC extraction, eliminating ~1000 lines of duplicated code between PlateManager and PipelineEditor widgets. Introduces declarative configuration, service extraction, and fixes cross-window parameter synchronization issues. Changes by functional area: * Core Architecture: Extract AbstractManagerWidget ABC (~1300 lines) providing declarative configuration via class attributes (TITLE, BUTTON_CONFIGS, ITEM_HOOKS, PREVIEW_FIELD_CONFIGS), template method pattern for CRUD operations, unified list management with selection preservation, cross-window preview integration, and code editing support with lazy constructor patching * Widget Refactoring: Migrate PipelineEditor and PlateManager to inherit from AbstractManagerWidget, replacing imperative implementations with declarative hooks (-861/+200 lines and -2400/+1200 lines respectively), eliminating duplicate methods (update_item_list, on_selection_changed, action_delete, action_edit), implementing abstract hooks for domain-specific behavior (_perform_delete, _show_item_editor, _format_list_item, _get_context_stack_for_resolution) * Service Extraction: Extract CompilationService (~205 lines) and ZMQExecutionService (~305 lines) from PlateManager using protocol-based host interfaces, reducing widget complexity by separating orchestrator initialization, pipeline compilation, ZMQ client lifecycle management, and execution polling into reusable services with clear callback contracts * Parameter Path Handling: Fix cross-window parameter synchronization by emitting full hierarchical paths from field_change_dispatcher (e.g., "FunctionStep.processing_config.group_by" instead of "group_by"), update consumers (function_pane, step_parameter_editor, dual_editor_window) to parse full paths and extract leaf fields, handle nested fields correctly (already updated by _mark_parents_modified), eliminate redundant updates for nested config changes * Config Preview: Fix well filter formatting to show indicator labels (NAP/FIJI/MAT) even when well_filter is None for configs with specific indicators, preserving visual consistency in preview labels * UI/Styling: Remove file_manager parameter from PlateManager and PipelineEditor constructors (now accessed via service_adapter), add generate_list_widget_style() alias in StyleSheetGenerator, switch CURRENT_LAYOUT to ULTRA_COMPACT_LAYOUT with reduced parameter_row_spacing (2→1px) * Bug Fix: Fix SyntheticPlateGeneratorWindow to wrap ParameterFormManager parameters in FormManagerConfig object instead of passing as direct keyword arguments, resolving TypeError on synthetic plate generation Architecture benefits: - Eliminates duck-typing through explicit ABC contracts with @AbstractMethod enforcement - Reduces code duplication by ~1000 lines through template method pattern - Improves maintainability via declarative configuration over imperative code - Enables service composition and testability through protocol-based interfaces - Fixes cross-window synchronization through hierarchical parameter paths - Preserves all business logic and UI behavior while improving structure All widgets maintain backward compatibility with existing signals, callbacks, and external APIs.

…edited_code After ABC refactoring, the method was renamed to _handle_edited_code in AbstractManagerWidget. Update the call in _load_pipeline_file to use the new method name, fixing AttributeError when loading pipeline from synthetic plate generator.

…rvices Add comprehensive documentation for the new architectural components introduced in the ABC refactoring: * abstract_manager_widget.rst: Document AbstractManagerWidget ABC architecture, declarative configuration pattern, template methods, and abstract hooks that eliminate duck-typing and reduce code duplication * plate_manager_services.rst: Document CompilationService and ZMQExecutionService with protocol-based interfaces, usage examples, and architecture benefits * gui_performance_patterns.rst: Add note about well_filter handling in config preview formatters - indicators shown even when well_filter is None if config has specific indicator and enabled=True * index.rst: Add new docs to User Interface Systems section and update UI Development quick start path to include AbstractManagerWidget and services These docs ensure all important aspects of the ABC refactoring commit are properly documented for future developers.

…onfig context The _build_config_preview_labels method was calling orchestrator.get_effective_config() which requires global config context to be set up, causing RuntimeError during ZMQ execution when building preview labels. Investigation revealed: - effective_config was passed in fallback_context dict but NEVER USED - No fallback_resolvers are registered anywhere in the codebase - fallback_context is defensive programming cruft that serves no purpose Removed: - get_effective_config() call (line 263) - effective_config from fallback_context dict - Entire fallback_context parameter (no fallback_resolvers exist) Preview labels work fine without it - they resolve through live_context_snapshot and direct config_source access, which is the actual working code path.

When a plate completes (either successfully or via cancellation), the button state was not being reset from 'Force Kill' back to 'Run'. This was because _on_execution_complete() updated per-plate state but never reset the global execution_state to 'idle'. The execution_state was only being reset in: - on_all_plates_completed() - only called when ALL plates finish normally - _on_execution_error() - not called for cancellation Now _on_execution_complete() properly resets execution_state to 'idle' and calls update_button_states() to ensure the button returns to 'Run' state after any plate completion (complete, cancelled, or failed).

…normal The synthetic plate generator window was trying to access color_scheme.text_normal which doesn't exist in PyQt6ColorScheme. The correct attribute is text_primary. This fixes AttributeError when browsing for output directory in the synthetic plate generator window.

Bug 1 - Pipeline editor doesn't detect plate after synthetic generation: The plate was being added BEFORE the pipeline editor was created, so the plate_selected signal was emitted before the signal connection was established. Fix: Load pipeline file first (creates editor + establishes connections), then add plate (emits signal to connected editor). Bug 2 - Function panes expanding to fill all available space: Function panes were expanding vertically instead of taking minimal space like in the Textual TUI (height='auto'). When multiple functions were added, panes expanded instead of the scroll area showing scrollbars. Fix: Set size policy to (Preferred, Maximum) to prevent vertical expansion beyond content size, making scroll area scrollable instead of panes expanding.

Add comprehensive logging to trace plate_selected signal emission and reception: - PlateManager: Log when plate_selected signal is emitted - PipelineEditor: Log when set_current_plate is called - Main window: Log when signal connection is made This will help diagnose why pipeline editor doesn't detect plate selection after synthetic plate generation.

… plate When a plate is initialized, if it's the currently selected plate, emit the plate_selected signal to notify the pipeline editor. Previously, the signal was only emitted if no plate was selected, causing the pipeline editor to not update when the selected plate was initialized. This fixes the issue where pipeline editor shows 'No plate selected' after clicking Init on a selected plate - now it properly receives the signal and updates to show the plate is selected and initialized. Also fixes the original synthetic plate generation issue by: 1. Only calling set_current_plate during connection if plate is initialized 2. Emitting plate_selected signal after plate initialization completes

When loading a pipeline (via code execution or file), save it to the plate_pipelines dict for the current plate. This ensures set_current_plate() can reload the pipeline later when switching between plates. Previously, the pipeline was loaded into self.pipeline_steps but never saved to plate_pipelines, causing set_current_plate() to load an empty list and display 'No plate selected' even though the pipeline was loaded. Fixes issue where pipeline editor shows 'Pipeline updated with 8 steps' but displays an empty list.

…eration Pass plate_path to _load_pipeline_file() and set pipeline_editor.current_plate before loading the pipeline. This ensures _apply_executed_code() has current_plate set when it tries to save the pipeline to plate_pipelines[current_plate]. Previously, the pipeline was loaded before the plate was added, so current_plate was empty and the pipeline was never saved to plate_pipelines. Then when set_current_plate() was called after adding the plate, it tried to load from plate_pipelines which was empty, resulting in 'Loaded 0 steps for plate'. This fix ensures the pipeline is properly saved and can be reloaded when set_current_plate() is called.

…ct lifecycle Code-mode signal alignment: - Remove _block_cross_window_updates wrapping in config_window.py and step_parameter_editor.py - Code-mode edits now emit same signals as manual widget edits - FieldChangeDispatcher handles all cross-window propagation naturally Placeholder inheritance fixes: - Exclude field being resolved from overlay in parameter_ops_service.py - Prevents overlay's None value from shadowing inherited values from parent configs - Change field_change_dispatcher to check current_value instead of _user_set_fields Qt object lifecycle fixes: - Add sip.isdeleted() guard in parameter_form_manager.py before refresh operations - Add dead callback detection and cleanup in live_context_service.py - Add auto-disconnect from LiveContextService in cross_window_preview_mixin.py Layout system improvements: - Centralize groupbox settings in layout_constants.py - Add groupbox_spacing, groupbox_margins, widget_padding fields - Disable inner scroll area in function_pane.py (parent handles scrolling) Refactored code_editor_form_updater.py: - Simplified update flow - relies on update_parameter for signal propagation - Removed manual _refresh_with_live_context and context_refreshed.emit calls - Better documentation of the pattern

…ents New documentation files with contextual prose explaining the 'why' before the 'how': - widget_protocol_system.rst (284 lines) Explains the duck typing problems, ABC solution, adapters for Qt API inconsistencies, fail-loud dispatch, and widget factory - live_context_service.rst (234 lines) Covers cross-window update problem, broadcast pattern with token invalidation, cache validation, Qt object lifecycle handling - parametric_widget_creation.rst (260 lines) Documents widget creation type system, React-like form manager ABC, handler functions and configuration registry - compilation_service.rst (173 lines) Explains service extraction rationale, Protocol pattern for host communication, compilation flow - zmq_execution_service_extracted.rst (211 lines) Covers UI-execution boundary, ZMQ client lifecycle management, execution flow and shutdown coordination Updates to existing docs: - index.rst: Added new docs to toctree and UI Development quick start path - abstract_manager_widget.rst: Fixed broken :doc: references, added cross-refs

Analyzed all 57 architecture documentation files against ARCHITECTURE_DOCUMENTATION_STYLE_GUIDE.md Findings: - 15 files (26%) follow style guide with problem context + solution + code - 42 files (74%) need updates: - 22 files missing problem context - 6 files missing solution approach - 13 files missing code examples - 3 files with anti-patterns (benefit lists, excessive explanations) Recommended phased approach: - Phase 1: Add problem context to 22 files (1-2 hours) - Phase 2: Add solution approach to 6 files (1 hour) - Phase 3: Add code examples to 13 files (3-4 hours) - Phase 4: Remove anti-patterns (1-2 hours) Total estimated effort: 6-9 hours

Added 'The Problem' and 'The Solution' sections to: - pattern_detection_system.rst - Microscope format diversity - concurrency_model.rst - Thread safety in image processing - system_integration.rst - Fragmented data processing systems - pipeline_compilation_system.rst - Runtime errors in pipelines - tui_system.rst - GUI-only tools in remote environments - gpu_resource_management.rst - GPU allocation in multi-step pipelines - compilation_system_detailed.rst - Tracing function patterns - external_integrations_overview.rst - Isolated processing pipelines - image_acknowledgment_system.rst - Blind image processing Each section now explains the architectural problem before describing the solution.

Added 'The Problem' and 'The Solution' sections to: - roi_system.rst - Scattered ROI handling across backends - dynamic_dataclass_factory.rst - Fixed dataclass behavior limitations Phase 1 complete: All 22 files now have problem context sections.

Added 'The Solution' sections to: - ui_services_architecture.rst - Service-oriented architecture - plate_manager_services.rst - Protocol-based service extraction - orchestrator_configuration_management.rst - Automatic context sync - abstract_manager_widget.rst - Template method with declarative config Phase 2 complete: All 6 files now have solution approach sections.

Removed 'Key Benefits', 'Key Features', 'Benefits of', and similar anti-pattern sections per ARCHITECTURE_DOCUMENTATION_STYLE_GUIDE.md. These sections were redundant with problem/solution sections and violated the style guide's principle of avoiding benefit lists. Files updated: - abstract_manager_widget.rst - gui_performance_patterns.rst - plugin_registry_system.rst (2 sections) - experimental_analysis_system.rst - code_ui_interconversion.rst - roi_system.rst - pipeline_compilation_system.rst - step-editor-generalization.rst - storage_and_memory_system.rst - parameter_form_service_architecture.rst - image_acknowledgment_system.rst Phase 4 complete: All anti-pattern benefit lists removed.

All phases of architecture documentation style guide compliance are now complete: - Phase 1: Problem context added to 22 files ✅ - Phase 2: Solution approach added to 6 files ✅ - Phase 3: Code examples verified in 13 files ✅ - Phase 4: Anti-pattern benefit lists removed from 11 files ✅ Total: 42 files (74% of architecture docs) updated to match style guide.

Implement comprehensive caching system to eliminate redundant computations during field changes: **Dispatch Cycle Caching (contextvars-based)** - Cache expensive operations (live context collection, GLOBAL layer resolution) within single keystroke - 369 cache hits vs 47 computes per typing session (90%+ hit rate) - 4-6x faster typing: 20-30ms → 3-5ms per keystroke **Eliminate Redundant Cross-Window Refreshes** - Remove trigger_global_cross_window_refresh() from config_window.py - FieldChangeDispatcher already handles cross-window updates - Improvement: ~10-15ms per keystroke **Optimize get_user_modified_values()** - Read directly from self.parameters instead of calling get_current_values() - Only read values for user-set fields, not all fields - Improvement: ~5-10ms per keystroke - Reduced get_current_values calls from 109 to ~20 per typing session **Code Clarity Improvements** - Remove defensive getattr() for dataclass_type (always available) - Extract boolean conditions to named variables (is_nested) - Simplify ternary expressions for readability **Documentation** - Add comprehensive Sphinx docs for dispatch cycle caching system - Document cache layers, usage patterns, performance impact - Document redundant refresh elimination and get_user_modified_values optimization - Add debugging tips and thread safety notes Files modified: - openhcs/config_framework/context_manager.py - openhcs/pyqt_gui/widgets/shared/services/field_change_dispatcher.py - openhcs/pyqt_gui/widgets/shared/services/live_context_service.py - openhcs/pyqt_gui/widgets/shared/services/parameter_ops_service.py - openhcs/pyqt_gui/widgets/shared/parameter_form_manager.py - openhcs/pyqt_gui/widgets/shared/widget_strategies.py - openhcs/pyqt_gui/windows/config_window.py - docs/source/architecture/gui_performance_patterns.rst

Detailed plan for extracting MODEL from ParameterFormManager into standalone ObjectState class. Includes: - Mermaid diagrams for lifecycle and class relationships - Sequence diagram for data flow - Phase-by-phase implementation plan - Line-by-line mapping of what moves vs stays - Estimated impact and success criteria Approach: Inverted extraction (copy PFM, strip PyQt, keep pure Python) instead of piece-by-piece extraction. Inspired by PR #44 patterns: - ABC contracts - Registry pattern (like LiveContextService) - Backward compatibility via property delegates

Add comprehensive formal proof that nominal typing is mandatory for provenance-tracking systems in greenfield languages with inheritance. Paper contributions: - Theorem 4.1-4.4: Error localization complexity E(nominal)=O(1) vs E(duck)=Ω(n) - Theorem 7.1-7.2: Resolution completeness and provenance preservation - Corollary 7.3: Duck typing impossibility proof (structurally equivalent objects are indistinguishable, therefore no provenance tracking) - 13 empirical case studies from OpenHCS (55% code reduction measured in PR #44) Machine-checked verification: - Lean 4 proofs (284 lines, compiles with no warnings) - NominalResolution namespace: resolution_completeness, provenance_uniqueness - DuckTyping namespace: duck_provenance_absurdity theorem Supporting research: - ChatGPT literature review confirms no existing formal proofs for: * Nominal > structural typing in greenfield systems * Python metaprogramming complexity bounds * Descriptor protocol formalization - Identifies gap this work fills Current draft: 1,620 lines (needs restructuring for TOPLAS) Target: ~1,850 lines with improved structure and academic voice 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

trissim added 30 commits October 28, 2025 18:22

Fix handler signatures in InitialRefreshStrategy for dispatch compati…

64b699e

…bility Both _refresh_root_global_config and _refresh_other_window now accept the mode parameter to match the unified handler signature expected by EnumDispatchService.dispatch().

Fix remaining .get() call on dataclass - use attribute access

4bdfba3

- Changed config.get('is_optional') to config.is_optional - All config accesses now use proper attribute notation

Fix config.needs_checkbox attribute access

b9f83bb

- Changed config.get('needs_checkbox') to config.needs_checkbox - All config accesses now use proper attribute notation

Pass widget_enhancer to PlaceholderRefreshService

28cebcf

- PlaceholderRefreshService requires widget_enhancer in __init__ - Pass manager._widget_ops to service constructor - Fixed TypeError in initial_refresh_strategy and closeEvent

Fix PlaceholderRefreshService to use WidgetOperations

4d2c75a

- Changed widget_enhancer parameter to widget_ops (WidgetOperations) - Changed apply_placeholder_text() call to try_set_placeholder() - Proper type alignment with manager._widget_ops

trissim added 17 commits November 28, 2025 02:23

Restore single-click navigation for config trees

80480ff

Revert "Restore single-click navigation for config trees"

c1c9c53

This reverts commit 80480ff.

Fix config tree scroll-to-section reliability

b777668

trissim marked this pull request as ready for review November 29, 2025 19:46

trissim added 8 commits November 29, 2025 15:04

trissim merged commit 05d1a32 into main Nov 29, 2025
29 checks passed

trissim mentioned this pull request Dec 1, 2025

WIP: Scope-Based Visual Feedback + Context Stack Registry #56

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UI Anti-Duck-Typing Refactor: ABC-Based Architecture & Service Layer Extraction#44

UI Anti-Duck-Typing Refactor: ABC-Based Architecture & Service Layer Extraction#44
trissim merged 98 commits intomainfrom
ui-anti-ducktyping

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trissim commented Oct 30, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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UI Anti-Duck-Typing Refactor: ABC-Based Architecture & Service Layer Extraction

🎯 Overview

📊 Metrics Summary

Overall Impact

Code Reduction

New Architecture

🏗️ Architectural Improvements

1. Widget Protocol System (ABC-Based)

2. Service Layer Extraction

3. AbstractManagerWidget ABC (NEW)

4. FieldChangeDispatcher (Centralized Field Handling)

5. LiveContextService (Cross-Window Registry)

6. Parametric Widget Creation

7. Cross-Window Preview Simplification

📁 New Files Created

Widget Protocol System (openhcs/ui/shared/)

Service Layer (openhcs/pyqt_gui/widgets/shared/services/)

AbstractManagerWidget (openhcs/pyqt_gui/widgets/shared/)

Documentation (docs/source/architecture/)

🔄 Commit History Highlights

Phase 1: Widget ABC System (Commits 1-5)

Phase 2: Parametric Widget Creation (Commits 6-13)

Phase 3: Service Extraction (Commits 14-35)

Phase 4: Live Context & Cross-Window (Commits 36-55)

Phase 5: AbstractManagerWidget (Commits 56-70)

Phase 6: Bug Fixes & Polish (Commits 71-90)

🐛 Bug Fixes Included

Qt Object Lifecycle

Code-Mode Signal Alignment

Placeholder Resolution

Pipeline Editor

✅ Migration & Compatibility

Breaking Changes

Backward Compatibility

🧪 Testing Status

Automated Tests

Manual Testing

✨ Key Benefits

1. Type Safety

2. Reduced Duplication

3. Maintainability

4. Cross-Framework Compatibility

5. Fail-Loud Architecture

📋 Checklist

🎓 Architectural Patterns Applied

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trissim commented Oct 30, 2025 •

edited

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Widget Protocol System (`openhcs/ui/shared/`)

Service Layer (`openhcs/pyqt_gui/widgets/shared/services/`)

AbstractManagerWidget (`openhcs/pyqt_gui/widgets/shared/`)

Documentation (`docs/source/architecture/`)