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fix: Prevent invalid map bounds #123

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Janez T
2026-03-16 22:16:36 +01:00
parent cfd233d38e
commit 993563f059
11 changed files with 129 additions and 25 deletions
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34
lib/models/custom_map_config.dart
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@@ -1,3 +1,5 @@
import 'dart:math' as math;
import 'package:flutter_map/flutter_map.dart';
import 'package:latlong2/latlong.dart';
@@ -26,22 +28,34 @@ class CustomMapConfig {
bool get isCalibrated => metersPerPixel != null && metersPerPixel! > 0;
LatLngBounds get bounds => LatLngBounds(
const LatLng(0, 0),
LatLng(imageHeight.toDouble(), imageWidth.toDouble()),
);
double get _displayScale {
final heightScale = imageHeight / 90.0;
final widthScale = imageWidth / 180.0;
return math.max(1.0, math.max(heightScale, widthScale));
}
LatLngBounds get displayBounds => LatLngBounds(
LatLng(imageHeight.toDouble(), 0),
LatLng(0, imageWidth.toDouble()),
);
double get _displayHeight => imageHeight / _displayScale;
double get _displayWidth => imageWidth / _displayScale;
LatLngBounds get bounds =>
LatLngBounds(const LatLng(0, 0), LatLng(_displayHeight, _displayWidth));
LatLngBounds get displayBounds =>
LatLngBounds(LatLng(_displayHeight, 0), LatLng(0, _displayWidth));
LatLng toDisplayPoint(LatLng point) {
return LatLng(imageHeight.toDouble() - point.latitude, point.longitude);
return LatLng(
_displayHeight - (point.latitude / _displayScale),
point.longitude / _displayScale,
);
}
LatLng fromDisplayPoint(LatLng point) {
return LatLng(imageHeight.toDouble() - point.latitude, point.longitude);
return LatLng(
(_displayHeight - point.latitude) * _displayScale,
point.longitude * _displayScale,
);
}
Map<String, dynamic> toJson() {