# SituationMap Qt6 Migration Status

## Summary
The SituationMap module has been successfully migrated from Qt5 to Qt6 at the **source code level**. All Qt5 API calls have been updated to Qt6 equivalents.

## Completed Changes

### Qt6 API Migrations
1. **QStringView::slice() → sliced()** - Fixed in 5 files:
   - Symbology/sidc_codec.cpp
   - Symbology/sidc_builder.cpp
   - Symbology/sidc_builder_base.cpp
   - Symbology/symbol_properties.cpp
   - SymbologyImpl/symbol_dictionary_impl.cpp

2. **QSortFilterProxyModel filter changes** - Fixed in base_symbol_model.cpp:
   - beginFilterChange()/endFilterChange() → invalidateFilter() (3 occurrences)

3. **QFuture const-correctness** - Fixed in base_symbol_model.cpp:
   - Added `mutable` keyword to 3 lambdas capturing QFuture for waitForFinished() calls

### Directory Structure
All 22 subdirectories from Qt5 have been copied to Qt6:
- admin_scripts, ArcGISQt5Hack, ElevationMap, EvalApps, FunctionDialog
- GeometryModel, GraphicalObjects, LayerAggregation, LocalSrv
- MapImpl, MapObjects, MapObjectsImpl, MathUtils, ModuleTests
- Portal, README, Resources, Rubberbands, SideBar
- Symbology, SymbologyGui, Tests, UnitTests, UnitTestsGeoModel, Utils

## Build Status

### Without ArcGIS (BUILD_ARCGIS=OFF)
✅ Source code compiles successfully
⚠️ Some unrelated modules (e.g., EEMFakeServer) require Qt6WebSockets which is not installed

### With ArcGIS (BUILD_ARCGIS=ON)
❌ **Linker errors** - ArcGIS SDK binary incompatibility

## Critical Issue: ArcGIS SDK Compatibility

### Problem
The ArcGIS Maps SDK for Qt v300.0.0 library (`libEsriRuntimeQt.a`) was built against **Qt 6.8+**, but the system has **Qt 6.2.4** installed.

**Evidence:**
- ArcGIS SDK template requires: `Qt 6.8.2` minimum (per sdk/ideintegration/ArcGISRuntimeQtTemplate300_0_0/CMakeLists.txt)
- System Qt version: `6.2.4`
- Linker errors show undefined Qt6 internal symbols:
  - `QMetaObject::invokeMethodImpl`
  - `QFutureInterfaceBase::hasException()`
  - `QMetaType::registerHelper`
  - `QtPrivate::QMetaTypeInterfaceWrapper`

### Required Resolution
To build with ArcGIS support, one of the following is needed:

1. **Upgrade Qt to 6.8+** (recommended)
   - Install Qt 6.8.2 or later
   - Rebuild entire project against Qt 6.8+

2. **Obtain Qt 6.2-compatible ArcGIS SDK**
   - Contact Esri for an ArcGIS SDK build compatible with Qt 6.2.x
   - Note: ArcGIS SDK v300 may not support Qt 6.2

3. **Disable ArcGIS temporarily**
   - Build with `-DBUILD_ARCGIS=OFF`
   - Complete migration of non-ArcGIS code
   - Re-enable ArcGIS when compatible SDK is available

## Next Steps

1. **Immediate**: Decide on ArcGIS strategy (upgrade Qt, get compatible SDK, or disable)
2. **If disabling ArcGIS**: Complete migration of remaining 27 plugin files with beginFilterChange()/endFilterChange()
3. **After ArcGIS resolution**: Run full test suite to validate migration

## Files Modified in This Session
- Lts/Viewer/SituationMap/Symbology/sidc_codec.cpp
- Lts/Viewer/SituationMap/Symbology/sidc_builder.cpp
- Lts/Viewer/SituationMap/Symbology/sidc_builder_base.cpp
- Lts/Viewer/SituationMap/Symbology/symbol_properties.cpp
- Lts/Viewer/SituationMap/SymbologyImpl/symbol_dictionary_impl.cpp
- Lts/Viewer/SituationMap/SymbologyImpl/base_symbol_model.cpp