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Add WMS support and measurement functionality

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- Implemented WMS layer handling for Slovenian aerial imagery and overlays for cadastral parcels and forest roads.
- Added distance measurement feature allowing users to measure distances on the map with long press interactions.
- Updated localization files for Croatian, Italian, and Slovenian languages to include new measurement and WMS-related strings.
- Enhanced the map layer model to support WMS-specific properties.
- Introduced a new tile provider for debugging WMS requests.
- Updated the drawing toolbar to include measurement mode and clear measurement functionality.
- Integrated SharedPreferences to persist overlay visibility states across app sessions.
- Added utility functions for handling the Slovenian coordinate reference system (EPSG:3794).
This commit is contained in:
Janez T
2025-10-27 21:49:58 +01:00
parent a03cc4a363
commit a4dc85d130
29 changed files with 3327 additions and 20 deletions
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49
lib/providers/drawing_provider.dart
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@@ -6,7 +6,7 @@ import '../models/map_drawing.dart';
import '../utils/drawing_message_parser.dart';
/// Drawing mode state
enum DrawingMode { none, line, rectangle }
enum DrawingMode { none, line, rectangle, measure }
/// Provider for managing map drawings
class DrawingProvider with ChangeNotifier {
@@ -26,6 +26,11 @@ class DrawingProvider with ChangeNotifier {
List<LatLng> _currentLinePoints = [];
LatLng? _rectangleStartPoint;
// Distance measurement state
LatLng? _measurementPoint1;
LatLng? _measurementPoint2;
double? _measuredDistance; // in meters
// Getters
DrawingMode get drawingMode => _drawingMode;
Color get selectedColor => _selectedColor;
@@ -46,6 +51,9 @@ class DrawingProvider with ChangeNotifier {
List<LatLng> get currentLinePoints => List.unmodifiable(_currentLinePoints);
LatLng? get rectangleStartPoint => _rectangleStartPoint;
bool get isDrawing => _drawingMode != DrawingMode.none;
LatLng? get measurementPoint1 => _measurementPoint1;
LatLng? get measurementPoint2 => _measurementPoint2;
double? get measuredDistance => _measuredDistance;
/// Initialize and load saved drawings
Future<void> initialize() async {
@@ -126,8 +134,9 @@ class DrawingProvider with ChangeNotifier {
/// Update rectangle end point (for preview)
void updateRectangleEndPoint(LatLng endPoint) {
if (_drawingMode != DrawingMode.rectangle || _rectangleStartPoint == null)
if (_drawingMode != DrawingMode.rectangle || _rectangleStartPoint == null) {
return;
}
// Create preview rectangle
_currentDrawing = RectangleDrawing(
@@ -195,11 +204,47 @@ class DrawingProvider with ChangeNotifier {
notifyListeners();
}
/// Set first measurement point
void setMeasurementPoint1(LatLng point) {
if (_drawingMode != DrawingMode.measure) return;
_measurementPoint1 = point;
_measurementPoint2 = null;
_measuredDistance = null;
notifyListeners();
}
/// Set second measurement point and calculate distance
void setMeasurementPoint2(LatLng point) {
if (_drawingMode != DrawingMode.measure || _measurementPoint1 == null) return;
_measurementPoint2 = point;
_measuredDistance = _calculateDistance(_measurementPoint1!, point);
notifyListeners();
}
/// Calculate distance between two points using Haversine formula
double _calculateDistance(LatLng point1, LatLng point2) {
const Distance distance = Distance();
return distance.as(LengthUnit.Meter, point1, point2);
}
/// Clear measurement points
void clearMeasurement() {
_measurementPoint1 = null;
_measurementPoint2 = null;
_measuredDistance = null;
notifyListeners();
}
/// Cancel current drawing in progress
void _cancelCurrentDrawing() {
_currentLinePoints = [];
_rectangleStartPoint = null;
_currentDrawing = null;
_measurementPoint1 = null;
_measurementPoint2 = null;
_measuredDistance = null;
}
/// Clear current drawing (public method)