Feature/query store grid barchart

src/PlanViewer.App/App.axaml

@@ -20,6 +20,7 @@
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
                 <ResourceInclude Source="avares://PlanViewer.App/Themes/DarkTheme.axaml"/>
+                <ResourceInclude Source="avares://PlanViewer.App/Themes/BarChartConfig.axaml"/>
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Application.Resources>

src/PlanViewer.App/Controls/BarChartCell.axaml

@@ -0,0 +1,28 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="PlanViewer.App.Controls.BarChartCell">
+    <Grid RowDefinitions="Auto,4" Margin="2,1">
+        <!-- Numeric value text -->
+        <TextBlock x:Name="ValueText"
+                   Grid.Row="0"
+                   FontSize="11"
+                   VerticalAlignment="Center"
+                   Foreground="{DynamicResource ForegroundBrush}"/>
+
+        <!-- Bar row: background track + coloured fill -->
+        <Grid Grid.Row="1" ColumnDefinitions="*">
+            <Border x:Name="BarTrack"
+                    Height="3"
+                    CornerRadius="1"
+                    Background="{DynamicResource BackgroundLightBrush}"
+                    HorizontalAlignment="Stretch"
+                    VerticalAlignment="Center"/>
+            <Border x:Name="BarFill"
+                    Height="3"
+                    CornerRadius="1"
+                    HorizontalAlignment="Left"
+                    VerticalAlignment="Center"
+                    MinWidth="0"/>
+        </Grid>
+    </Grid>
+</UserControl>

src/PlanViewer.App/Controls/BarChartCell.axaml.cs

@@ -0,0 +1,140 @@
+using Avalonia;
+using System;
+using Avalonia.Controls;
+using Avalonia.Media;
+
+namespace PlanViewer.App.Controls;
+
+/// <summary>
+/// A DataGrid cell control that shows a text value above a proportional bar.
+/// The bar colour is resolved from application resources using the priority:
+///   BarChart.&lt;ColumnId&gt;  →  BarChart.Sorted (when isSorted)  →  BarChart.Default
+/// </summary>
+public partial class BarChartCell : UserControl
+{
+    // ── Avalonia properties ────────────────────────────────────────────────
+
+    public static readonly StyledProperty<string> DisplayTextProperty =
+        AvaloniaProperty.Register<BarChartCell, string>(nameof(DisplayText), string.Empty);
+
+    /// <summary>Value in [0..1] that controls the bar width.</summary>
+    public static readonly StyledProperty<double> RatioProperty =
+        AvaloniaProperty.Register<BarChartCell, double>(nameof(Ratio), 0.0);
+
+    /// <summary>Column identifier used to look up per-column brush overrides.</summary>
+    public static readonly StyledProperty<string> ColumnIdProperty =
+        AvaloniaProperty.Register<BarChartCell, string>(nameof(ColumnId), string.Empty);
+
+    /// <summary>When true the "Sorted" brush is preferred over "Default".</summary>
+    public static readonly StyledProperty<bool> IsSortedColumnProperty =
+        AvaloniaProperty.Register<BarChartCell, bool>(nameof(IsSortedColumn), false);
+
+    // ── CLR accessors ──────────────────────────────────────────────────────
+
+    public string DisplayText
+    {
+        get => GetValue(DisplayTextProperty);
+        set => SetValue(DisplayTextProperty, value);
+    }
+
+    public double Ratio
+    {
+        get => GetValue(RatioProperty);
+        set => SetValue(RatioProperty, value);
+    }
+
+    public string ColumnId
+    {
+        get => GetValue(ColumnIdProperty);
+        set => SetValue(ColumnIdProperty, value);
+    }
+
+    public bool IsSortedColumn
+    {
+        get => GetValue(IsSortedColumnProperty);
+        set => SetValue(IsSortedColumnProperty, value);
+    }
+
+    // ── Constructor ────────────────────────────────────────────────────────
+
+    public BarChartCell()
+    {
+        InitializeComponent();
+    }
+
+    // ── Property-change overrides ──────────────────────────────────────────
+
+    protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+    {
+        base.OnPropertyChanged(change);
+
+        if (change.Property == DisplayTextProperty)
+            UpdateText();
+        else if (change.Property == RatioProperty || change.Property == BoundsProperty)
+            UpdateBar();
+        else if (change.Property == ColumnIdProperty || change.Property == IsSortedColumnProperty)
+            UpdateBarColor();
+    }
+
+    protected override void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
+    {
+        base.OnAttachedToVisualTree(e);
+        UpdateText();
+        UpdateBar();
+        UpdateBarColor();
+    }
+
+    // ── Helpers ────────────────────────────────────────────────────────────
+
+    private void UpdateText()
+    {
+        if (ValueText != null)
+            ValueText.Text = DisplayText;
+    }
+
+    private void UpdateBar()
+    {
+        if (BarTrack == null || BarFill == null) return;
+
+        var ratio = global::System.Math.Max(0.0, global::System.Math.Min(1.0, Ratio));
+        var trackWidth = BarTrack.Bounds.Width;
+
+        // Fall back to control width when layout hasn't run yet
+        if (trackWidth <= 0)
+            trackWidth = Bounds.Width - 4; // subtract Margin="2,1" × 2
+
+        BarFill.Width = trackWidth > 0 ? ratio * trackWidth : 0;
+    }
+
+    private void UpdateBarColor()
+    {
+        if (BarFill == null) return;
+
+        // 1. Per-column override
+        if (!string.IsNullOrEmpty(ColumnId) &&
+            Application.Current!.TryFindResource($"BarChart.{ColumnId}", out var colRes) &&
+            colRes is IBrush colBrush)
+        {
+            BarFill.Background = colBrush;
+            return;
+        }
+
+        // 2. Sorted vs Default
+        var key = IsSortedColumn ? "BarChart.Sorted" : "BarChart.Default";
+        if (Application.Current!.TryFindResource(key, out var res) && res is IBrush brush)
+            BarFill.Background = brush;
+        else
+            BarFill.Background = IsSortedColumn
+                ? new SolidColorBrush(Color.FromRgb(0x2E, 0xAE, 0xF1))
+                : new SolidColorBrush(Color.FromRgb(0x3A, 0x6E, 0xA8));
+    }
+
+    // ── Layout override to update bar after measure ─────────────────────--
+
+    protected override Size ArrangeOverride(Size finalSize)
+    {
+        var result = base.ArrangeOverride(finalSize);
+        UpdateBar();
+        return result;
+    }
+}