From b638d4e752dc9967f06c5206c42f41cbe90c8225 Mon Sep 17 00:00:00 2001
From: Alek-ban <alek.kovkov124@gmail.com>
Date: Mon, 9 Feb 2026 15:23:43 +0300
Subject: [PATCH] feat: SectionPanel

---
 GSS2.Test/ViewModels/MainViewModel.cs |  9 ++-
 GSS2.Test/Views/MainView.axaml        | 18 +++--
 GSS2.UI.Core/SectionPanel.cs          | 96 +++++++++++++++++++++++++++
 3 files changed, 114 insertions(+), 9 deletions(-)
 create mode 100644 GSS2.UI.Core/SectionPanel.cs

diff --git a/GSS2.Test/ViewModels/MainViewModel.cs b/GSS2.Test/ViewModels/MainViewModel.cs
index afab441..1cfad08 100644
--- a/GSS2.Test/ViewModels/MainViewModel.cs
+++ b/GSS2.Test/ViewModels/MainViewModel.cs
@@ -13,7 +13,10 @@ public partial class MainViewModel : ViewModelBase
     [ObservableProperty] private CameraViewModel _cameraViewModel;
     [ObservableProperty] private ResourcesViewModel _resourcesViewModel;
     [ObservableProperty] private OpenCvSharp.Mat? _image;
-    [ObservableProperty] private IRelayCommand _buttonClick;
+    [ObservableProperty] private IRelayCommand _buttonCaptureClick;
+    [ObservableProperty] private IRelayCommand _buttonUpClick;
+    [ObservableProperty] private IRelayCommand _buttonDownClick;
+    [ObservableProperty] private int _currentIndex;
 
     public MainViewModel(ILogger<MainViewModel> logger, CameraViewModel cameraViewModel, ResourcesViewModel resourcesViewModel, CameraService cameraService)
     {
@@ -21,10 +24,12 @@ public partial class MainViewModel : ViewModelBase
         _cameraService = cameraService;
         CameraViewModel = cameraViewModel;
         ResourcesViewModel = resourcesViewModel;
-        ButtonClick = new RelayCommand(() =>
+        ButtonCaptureClick = new RelayCommand(() =>
         {
             Task.Run(() => cameraService.CaptureImage(CancellationToken.None, 10).ContinueWith(image => Image = image.Result));
         });
+        ButtonUpClick = new RelayCommand(() => CurrentIndex--);
+        ButtonDownClick = new RelayCommand(() => CurrentIndex++);
 
         _logger.LogInformation("{} initialized", nameof(MainViewModel));
     }
diff --git a/GSS2.Test/Views/MainView.axaml b/GSS2.Test/Views/MainView.axaml
index 6256e2f..4b61d85 100644
--- a/GSS2.Test/Views/MainView.axaml
+++ b/GSS2.Test/Views/MainView.axaml
@@ -6,12 +6,16 @@
              xmlns:core="using:GSS2.UI.Core"
              x:DataType="local_vm:MainViewModel"
              x:Class="GSS2.Test.Views.MainView">
-    <Grid RowDefinitions="*,*">
-        <Grid Grid.Row="0" ColumnDefinitions="*,*,Auto">
-            <ContentControl Grid.Column="0" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Content="{Binding CameraViewModel}" />
-            <core:OpenCvImage Grid.Column="1" Image="{Binding Image}" />
-            <Button Grid.Column="2" Width="50" VerticalAlignment="Stretch" Command="{Binding ButtonClick}"/>
-        </Grid>
-        <ContentControl Grid.Row="1" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Content="{Binding ResourcesViewModel}" />
+    <Grid ColumnDefinitions="*,100" RowDefinitions="*,*">
+        <Button Grid.Row="0" Grid.Column="1"  VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Command="{Binding ButtonUpClick}"/>
+        <Button Grid.Row="1" Grid.Column="1"  VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Command="{Binding ButtonDownClick}"/>
+        <core:SectionPanel Grid.Row="0" Grid.RowSpan="2" Grid.Column="0" CurrentIndex="{Binding CurrentIndex}">
+            <ContentControl VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Content="{Binding ResourcesViewModel}" />
+            <ContentControl VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Content="{Binding CameraViewModel}" />
+            <Grid ColumnDefinitions="100, *">
+                <Button Grid.Column="0" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Command="{Binding ButtonCaptureClick}"/>
+                <core:OpenCvImage Grid.Column="1" Image="{Binding Image}" Background="Red" />
+            </Grid>
+        </core:SectionPanel>
     </Grid>
 </UserControl>
\ No newline at end of file
diff --git a/GSS2.UI.Core/SectionPanel.cs b/GSS2.UI.Core/SectionPanel.cs
new file mode 100644
index 0000000..c4b6f64
--- /dev/null
+++ b/GSS2.UI.Core/SectionPanel.cs
@@ -0,0 +1,96 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Media;
+
+namespace GSS2.UI.Core;
+
+public enum SectionDirection
+{
+    UpDown,
+    DownUp,
+    LeftRight,
+    RightLeft
+}
+
+public class SectionPanel : Panel
+{
+    public static readonly StyledProperty<int> CurrentIndexProperty = AvaloniaProperty.Register<SectionPanel, int>(nameof(CurrentIndex), 0);
+    public int CurrentIndex
+    {
+        get => GetValue(CurrentIndexProperty);
+        set => SetValue(CurrentIndexProperty, value);
+    }
+    public static readonly StyledProperty<double> AnimationSpeedProperty = AvaloniaProperty.Register<SectionPanel, double>(nameof(AnimationSpeed), 300);
+    public double AnimationSpeed
+    {
+        get => GetValue(AnimationSpeedProperty);
+        set => SetValue(AnimationSpeedProperty, value);
+    }
+    public static readonly StyledProperty<SectionDirection> DirectionProperty = AvaloniaProperty.Register<SectionPanel, SectionDirection>(nameof(Direction), SectionDirection.UpDown);
+    public SectionDirection Direction
+    {
+        get => GetValue(DirectionProperty);
+        set => SetValue(DirectionProperty, value);
+    }
+
+    public SectionPanel()
+    : base()
+    {
+        CurrentIndexProperty.Changed.AddClassHandler<SectionPanel>((panel, _) => panel.InvalidateArrange());
+    }
+
+    protected override Size MeasureOverride(Size availableSize)
+    {
+        foreach (var child in Children)
+            child.Measure(availableSize);
+
+        Console.WriteLine(availableSize);
+        return availableSize;
+    }
+    protected override Size ArrangeOverride(Size finalSize)
+    {
+        for (int i = 0; i < Children.Count; i++)
+        {
+            var child = Children[i];
+
+            var rect = Direction switch
+            {
+                SectionDirection.UpDown => new Rect(0, i * finalSize.Height, finalSize.Width, finalSize.Height),
+                SectionDirection.DownUp => new Rect(0, -i * finalSize.Height, finalSize.Width, finalSize.Height),
+                SectionDirection.LeftRight => new Rect(i * finalSize.Width, 0, finalSize.Width, finalSize.Height),
+                SectionDirection.RightLeft => new Rect(-i * finalSize.Width, 0, finalSize.Width, finalSize.Height),
+
+                _ => default
+            };
+
+            child.Arrange(rect);
+        }
+
+        ApplyOffset(finalSize);
+
+        return finalSize;
+    }
+    private void ApplyOffset(Size size)
+    {
+        double offset = Direction switch
+        {
+            SectionDirection.UpDown => -CurrentIndex * size.Height,
+            SectionDirection.DownUp => CurrentIndex * size.Height,
+            SectionDirection.LeftRight => -CurrentIndex * size.Width,
+            SectionDirection.RightLeft => CurrentIndex * size.Width,
+            _ => 0
+        };
+
+        var transform = RenderTransform as TranslateTransform;
+        if (transform is null)
+        {
+            transform = new TranslateTransform();
+            RenderTransform = transform;
+        }
+
+        if (Direction is SectionDirection.LeftRight or SectionDirection.RightLeft)
+            transform.X = offset;
+        else
+            transform.Y = offset;
+    }
+}
\ No newline at end of file