made zoom slider vertical & added more ticks to ruler

lib/res/dimens.dart

@@ -38,7 +38,7 @@ class Dimens {
   // `CenteredSlider`
   static const double cameraSliderTrackHeight = grid4;
   static const double cameraSliderTrackRadius = cameraSliderTrackHeight / 2;
-  static const double cameraSliderHandleSize = 32;
+  static const double cameraSliderHandleSize = 24;
   static const double cameraSliderHandleIconSize = cameraSliderHandleSize * 2 / 3;
 
   // Dialog

lib/screens/metering/components/camera_container/components/camera_controls/components/exposure_offset_slider/widget_slider_exposure_offset.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
-import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/shared/ruler_slider/widget_slider_ruler.dart';
-import 'package:lightmeter/screens/shared/centered_slider/widget_slider_centered.dart';
 import 'package:lightmeter/utils/to_string_signed.dart';
 
 class ExposureOffsetSlider extends StatelessWidget {
@@ -26,68 +25,15 @@ class ExposureOffsetSlider extends StatelessWidget {
           tooltip: S.of(context).tooltipResetToZero,
         ),
         Expanded(
-          child: Row(
+          child: RulerSlider(
-            mainAxisAlignment: MainAxisAlignment.center,
+            icon: Icons.light_mode,
-            children: [
+            range: range,
-              Padding(
-                padding: const EdgeInsets.symmetric(vertical: Dimens.grid8),
-                child: _Ruler(
-                  range.start,
-                  range.end,
-                ),
-              ),
-              CenteredSlider(
-                isVertical: true,
-                icon: const Icon(Icons.light_mode),
             value: value,
-                min: range.start,
-                max: range.end,
             onChanged: onChanged,
-              ),
+            rulerValueAdapter: (value) => value.toStringSignedAsFixed(0),
-            ],
           ),
         ),
       ],
     );
   }
 }
-
-class _Ruler extends StatelessWidget {
-  final double min;
-  final double max;
-
-  const _Ruler(this.min, this.max);
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.end,
-      mainAxisAlignment: MainAxisAlignment.spaceBetween,
-      children: List.generate(
-        (max - min + 1).toInt(),
-        (index) {
-          final bool showValue = index % 2 == 0.0 || index == 0.0;
-          return Row(
-            mainAxisAlignment: MainAxisAlignment.end,
-            children: [
-              if (showValue)
-                Text(
-                  (index + min).toStringSignedAsFixed(0),
-                  style: Theme.of(context).textTheme.bodyLarge,
-                ),
-              const SizedBox(width: Dimens.grid8),
-              ColoredBox(
-                color: Theme.of(context).colorScheme.onBackground,
-                child: SizedBox(
-                  height: 1,
-                  width: showValue ? Dimens.grid16 : Dimens.grid8,
-                ),
-              ),
-              const SizedBox(width: Dimens.grid8),
-            ],
-          );
-        },
-      ).reversed.toList(),
-    );
-  }
-}

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

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:lightmeter/screens/shared/centered_slider/widget_slider_centered.dart';
+import 'package:lightmeter/screens/shared/ruler_slider/widget_slider_ruler.dart';
 
 class ZoomSlider extends StatelessWidget {
   final RangeValues range;
@@ -15,12 +15,22 @@ class ZoomSlider extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return CenteredSlider(
+    return Column(
-      icon: const Icon(Icons.search),
+      children: [
+        const IconButton(
+          icon: Icon(Icons.lock_open),
+          onPressed: null,
+        ),
+        Expanded(
+          child: RulerSlider(
+            icon: Icons.search,
+            range: range,
             value: value,
-      min: range.start,
-      max: range.end,
             onChanged: onChanged,
+            rulerValueAdapter: (value) => '${value.toStringAsFixed(0)}x',
+          ),
+        ),
+      ],
     );
   }
 }

lib/screens/metering/components/camera_container/components/camera_controls/widget_camera_controls.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:lightmeter/res/dimens.dart';
 
 import 'package:lightmeter/screens/metering/components/camera_container/components/camera_controls/components/exposure_offset_slider/widget_slider_exposure_offset.dart';
 import 'package:lightmeter/screens/metering/components/camera_container/components/camera_controls/components/zoom_slider/widget_slider_zoom.dart';
@@ -25,16 +24,14 @@ class CameraControls extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Column(
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
       children: [
-        Expanded(
+        ExposureOffsetSlider(
-          child: ExposureOffsetSlider(
           range: exposureOffsetRange,
           value: exposureOffsetValue,
           onChanged: onExposureOffsetChanged,
         ),
-        ),
-        const SizedBox(height: Dimens.grid24),
         ZoomSlider(
           range: zoomRange,
           value: zoomValue,

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

@@ -157,7 +157,12 @@ class _CameraControlsBuilder extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Padding(
-      padding: const EdgeInsets.symmetric(vertical: Dimens.paddingM),
+      padding: const EdgeInsets.fromLTRB(
+        Dimens.paddingL,
+        Dimens.paddingM,
+        0,
+        Dimens.paddingL,
+      ),
       child: BlocBuilder<CameraContainerBloc, CameraContainerState>(
         builder: (context, state) {
           late final Widget child;

lib/screens/shared/ruler_slider/widget_slider_ruler.dart

@@ -0,0 +1,100 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/shared/centered_slider/widget_slider_centered.dart';
+
+class RulerSlider extends StatelessWidget {
+  final IconData icon;
+  final RangeValues range;
+  final double value;
+  final ValueChanged<double> onChanged;
+  final String Function(double value) rulerValueAdapter;
+
+  const RulerSlider({
+    required this.icon,
+    required this.range,
+    required this.value,
+    required this.onChanged,
+    required this.rulerValueAdapter,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        _Ruler(
+          range.start,
+          range.end,
+          rulerValueAdapter,
+        ),
+        CenteredSlider(
+          isVertical: true,
+          icon: Icon(icon),
+          value: value,
+          min: range.start,
+          max: range.end,
+          onChanged: onChanged,
+        ),
+      ],
+    );
+  }
+}
+
+class _Ruler extends StatelessWidget {
+  final double min;
+  final double max;
+  final String Function(double value) rulerValueAdapter;
+  late final int mainTicksCount = (max - min + 1).toInt();
+  late final int itemsCount = mainTicksCount * 2 - 1;
+
+  _Ruler(
+    this.min,
+    this.max,
+    this.rulerValueAdapter,
+  );
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final bool showAllMainTicks = Dimens.cameraSliderHandleSize * mainTicksCount <= constraints.maxHeight;
+        return Column(
+          crossAxisAlignment: CrossAxisAlignment.end,
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          children: List.generate(
+            itemsCount,
+            (index) {
+              final bool isMainTick = index % 2 == 0.0;
+              if (!showAllMainTicks && !isMainTick) {
+                return const SizedBox();
+              }
+              final bool showValue = (index % (showAllMainTicks ? 2 : 4) == 0.0);
+              return SizedBox(
+                height: index == itemsCount - 1 || showValue ? Dimens.cameraSliderHandleSize : 1,
+                child: Row(
+                  mainAxisAlignment: MainAxisAlignment.end,
+                  children: [
+                    if (showValue)
+                      Text(
+                        rulerValueAdapter(index / 2 + min),
+                        style: Theme.of(context).textTheme.bodySmall,
+                      ),
+                    const SizedBox(width: Dimens.grid4),
+                    ColoredBox(
+                      color: Theme.of(context).colorScheme.onBackground,
+                      child: SizedBox(
+                        height: 1,
+                        width: isMainTick ? Dimens.grid8 : Dimens.grid4,
+                      ),
+                    ),
+                    const SizedBox(width: Dimens.grid4),
+                  ],
+                ),
+              );
+            },
+          ).reversed.toList(),
+        );
+      },
+    );
+  }
+}