notify camera bloc about equipment profile changes

lib/screens/metering/communication/bloc_communication_metering.dart

@@ -8,6 +8,7 @@ class MeteringCommunicationBloc extends Bloc<MeteringCommunicationEvent, Meterin
     // `MeasureState` is not const, so that `Bloc` treats each state as new and updates state stream
     // ignore: prefer_const_constructors
     on<MeasureEvent>((_, emit) => emit(MeasureState()));
+    on<EquipmentProfileChangedEvent>((event, emit) => emit(EquipmentProfileChangedState(event.profile)));
     on<MeteringInProgressEvent>((event, emit) => emit(MeteringInProgressState(event.ev100)));
     on<MeteringEndedEvent>((event, emit) => emit(MeteringEndedState(event.ev100)));
     on<ScreenOnTopOpenedEvent>((_, emit) => emit(const SettingsOpenedState()));

lib/screens/metering/communication/event_communication_metering.dart

@@ -1,19 +1,29 @@
+import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
+
 abstract class MeteringCommunicationEvent {
   const MeteringCommunicationEvent();
 }
 
-abstract class SourceEvent extends MeteringCommunicationEvent {
-  const SourceEvent();
-}
-
+/// Events sent by the screen to the current metering source.
 abstract class ScreenEvent extends MeteringCommunicationEvent {
   const ScreenEvent();
 }
 
+/// Event sent by the current metering source in response for the screen events.
+abstract class SourceEvent extends MeteringCommunicationEvent {
+  const SourceEvent();
+}
+
 class MeasureEvent extends ScreenEvent {
   const MeasureEvent();
 }
 
+class EquipmentProfileChangedEvent extends ScreenEvent {
+  final EquipmentProfile profile;
+
+  const EquipmentProfileChangedEvent(this.profile);
+}
+
 abstract class MeasuredEvent extends SourceEvent {
   final double? ev100;
 

lib/screens/metering/communication/state_communication_metering.dart

@@ -1,3 +1,5 @@
+import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
+
 sealed class MeteringCommunicationState {
   const MeteringCommunicationState();
 }
@@ -18,6 +20,12 @@ class MeasureState extends SourceState {
   const MeasureState();
 }
 
+class EquipmentProfileChangedState extends SourceState {
+  final EquipmentProfile profile;
+
+  const EquipmentProfileChangedState(this.profile);
+}
+
 sealed class MeasuredState extends ScreenState {
   final double? ev100;
 

lib/screens/metering/components/camera_container/bloc_container_camera.dart

@@ -86,6 +86,12 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
             }
           });
         }
+      case final communication_states.EquipmentProfileChangedState communicationState:
+        if (state is CameraActiveState) {
+          add(ZoomChangedEvent(communicationState.profile.lensZoom));
+        } else {
+          _currentZoom = communicationState.profile.lensZoom;
+        }
       case communication_states.SettingsOpenedState():
         _settingsOpened = true;
         add(const DeinitializeEvent());
@@ -139,25 +145,6 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
       await _cameraController!.setFlashMode(FlashMode.off);
       await _cameraController!.lockCaptureOrientation(DeviceOrientation.portraitUp);
 
-      /// For app startup initialization this effectively isn't executed.
-      await Future.wait<void>([
-        if (_currentZoom != 1.0) _cameraController!.setZoomLevel(_currentZoom),
-        if (_currentExposureOffset != 0.0) _cameraController!.setExposureOffset(_currentExposureOffset),
-      ]);
-
-      if (_zoomRange == null) {
-        await Future.wait<double>([
-          _cameraController!.getMinZoomLevel(),
-          _cameraController!.getMaxZoomLevel(),
-        ]).then((value) {
-          _zoomRange = RangeValues(
-            math.max(1.0, value[0]),
-            math.min(_maxZoom, value[1]),
-          );
-          _currentZoom = _zoomRange!.start;
-        });
-      }
-
       if (_exposureOffsetRange == null) {
         await Future.wait<double>([
           _cameraController!.getMinExposureOffset(),
@@ -173,6 +160,27 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
         });
       }
 
+      if (_zoomRange == null) {
+        await Future.wait<double>([
+          _cameraController!.getMinZoomLevel(),
+          _cameraController!.getMaxZoomLevel(),
+        ]).then((value) {
+          _zoomRange = RangeValues(
+            math.max(1.0, value[0]),
+            math.min(_maxZoom, value[1]),
+          );
+          if (_currentZoom < _zoomRange!.start || _currentZoom > _zoomRange!.end) {
+            _currentZoom = _zoomRange!.start;
+          }
+        });
+      }
+
+      /// For app startup initialization this effectively isn't executed.
+      await Future.wait<void>([
+        if (_currentZoom != 1.0) _cameraController!.setZoomLevel(_currentZoom),
+        if (_currentExposureOffset != 0.0) _cameraController!.setExposureOffset(_currentExposureOffset),
+      ]);
+
       emit(CameraInitializedState(_cameraController!));
       _emitActiveState(emit);
     } catch (e) {
@@ -187,7 +195,7 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
   }
 
   Future<void> _onZoomChanged(ZoomChangedEvent event, Emitter emit) async {
-    if (_cameraController != null) {
+    if (_cameraController != null && _zoomRange != null) {
       final double zoom = event.value.clamp(_zoomRange!.start, _zoomRange!.end);
       _cameraController!.setZoomLevel(zoom);
       _currentZoom = zoom;

lib/screens/metering/components/camera_container/components/camera_controls/components/zoom_slider/widget_slider_zoom.dart

@@ -3,7 +3,7 @@ import 'package:lightmeter/providers/equipment_profile_provider.dart';
 import 'package:lightmeter/screens/shared/ruler_slider/widget_slider_ruler.dart';
 import 'package:lightmeter/utils/double_to_zoom.dart';
 
-class ZoomSlider extends StatefulWidget {
+class ZoomSlider extends StatelessWidget {
   final RangeValues range;
   final double value;
   final ValueChanged<double> onChanged;
@@ -15,23 +15,12 @@ class ZoomSlider extends StatefulWidget {
     super.key,
   });
 
-  @override
-  State<ZoomSlider> createState() => _ZoomSliderState();
-}
-
-class _ZoomSliderState extends State<ZoomSlider> {
-  @override
-  void didChangeDependencies() {
-    super.didChangeDependencies();
-    widget.onChanged(EquipmentProfiles.selectedOf(context).lensZoom);
-  }
-
   @override
   Widget build(BuildContext context) {
     return RulerSlider(
-      range: widget.range,
-      value: widget.value,
-      onChanged: widget.onChanged,
+      range: range,
+      value: value,
+      onChanged: onChanged,
       icon: Icons.search_outlined,
       defaultValue: EquipmentProfiles.selectedOf(context).lensZoom,
       rulerValueAdapter: (value) => value.toStringAsFixed(0),

lib/screens/metering/components/shared/readings_container/components/equipment_profile_picker/widget_picker_equipment_profiles.dart

@@ -1,13 +1,28 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:lightmeter/generated/l10n.dart';
 import 'package:lightmeter/providers/equipment_profile_provider.dart';
+import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
+import 'package:lightmeter/screens/metering/communication/event_communication_metering.dart';
 import 'package:lightmeter/screens/metering/components/shared/readings_container/components/shared/animated_dialog_picker/widget_picker_dialog_animated.dart';
 import 'package:lightmeter/screens/metering/components/shared/readings_container/components/shared/reading_value_container/widget_container_reading_value.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
-class EquipmentProfilePicker extends StatelessWidget {
+class EquipmentProfilePicker extends StatefulWidget {
   const EquipmentProfilePicker();
 
+  @override
+  State<EquipmentProfilePicker> createState() => _EquipmentProfilePickerState();
+}
+
+class _EquipmentProfilePickerState extends State<EquipmentProfilePicker> {
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    final profile = EquipmentProfiles.selectedOf(context);
+    context.read<MeteringCommunicationBloc>().add(EquipmentProfileChangedEvent(profile));
+  }
+
   @override
   Widget build(BuildContext context) {
     return AnimatedDialogPicker<EquipmentProfile>(
@@ -16,7 +31,10 @@ class EquipmentProfilePicker extends StatelessWidget {
       selectedValue: EquipmentProfiles.selectedOf(context),
       values: EquipmentProfiles.inUseOf(context),
       itemTitleBuilder: (_, value) => Text(value.id.isEmpty ? S.of(context).none : value.name),
-      onChanged: EquipmentProfilesProvider.of(context).selectProfile,
+      onChanged: (profile) {
+        EquipmentProfilesProvider.of(context).selectProfile(profile);
+        context.read<MeteringCommunicationBloc>().add(EquipmentProfileChangedEvent(profile));
+      },
       closedChild: ReadingValueContainer.singleValue(
         value: ReadingValue(
           label: S.of(context).equipmentProfile,