Fix/query store grid usability

src/PlanViewer.App/Controls/ColumnFilterPopup.axaml

@@ -0,0 +1,32 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="PlanViewer.App.Controls.ColumnFilterPopup"
+             Width="220">
+    <Border Background="{DynamicResource BackgroundDarkBrush}"
+            BorderBrush="{DynamicResource BorderBrush}"
+            BorderThickness="1" CornerRadius="6">
+        <StackPanel Margin="12" Spacing="4">
+            <TextBlock x:Name="HeaderText" Text="Filter Column"
+                       FontWeight="SemiBold" FontSize="13" Margin="0,0,0,8"
+                       Foreground="{DynamicResource ForegroundBrush}"/>
+            <TextBlock Text="Operator:" FontSize="11" Margin="0,0,0,2"
+                       Foreground="{DynamicResource ForegroundBrush}"/>
+            <ComboBox x:Name="OperatorComboBox" HorizontalAlignment="Stretch"
+                      Height="28" FontSize="12" Margin="0,0,0,8"
+                      SelectionChanged="OperatorComboBox_SelectionChanged"/>
+            <TextBlock x:Name="ValueLabel" Text="Value:" FontSize="11" Margin="0,0,0,2"
+                       Foreground="{DynamicResource ForegroundBrush}"/>
+            <TextBox x:Name="ValueTextBox" HorizontalAlignment="Stretch"
+                     Height="28" FontSize="12" Margin="0,0,0,12"
+                     KeyDown="ValueTextBox_KeyDown"/>
+            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Spacing="8">
+                <Button Content="Clear" Width="65" Height="28"
+                        Click="ClearButton_Click"
+                        Theme="{StaticResource AppButton}"/>
+                <Button Content="Apply" Width="65" Height="28"
+                        Click="ApplyButton_Click"
+                        Theme="{StaticResource AppButton}"/>
+            </StackPanel>
+        </StackPanel>
+    </Border>
+</UserControl>

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

@@ -0,0 +1,113 @@
+using System;
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+
+namespace PlanViewer.App.Controls;
+
+public partial class ColumnFilterPopup : UserControl
+{
+    public event EventHandler<FilterAppliedEventArgs>? FilterApplied;
+    public event EventHandler? FilterCleared;
+
+    private string _currentColumnName = "";
+
+    private static readonly (string Display, FilterOperator Op)[] Operators =
+    [
+        ("Contains",           FilterOperator.Contains),
+        ("Equals (=)",         FilterOperator.Equals),
+        ("Not Equals (!=)",    FilterOperator.NotEquals),
+        ("Starts With",        FilterOperator.StartsWith),
+        ("Ends With",          FilterOperator.EndsWith),
+        ("Greater Than (>)",   FilterOperator.GreaterThan),
+        ("Greater or Equal (>=)", FilterOperator.GreaterThanOrEqual),
+        ("Less Than (<)",      FilterOperator.LessThan),
+        ("Less or Equal (<=)", FilterOperator.LessThanOrEqual),
+        ("Is Empty",           FilterOperator.IsEmpty),
+        ("Is Not Empty",       FilterOperator.IsNotEmpty),
+    ];
+
+    public ColumnFilterPopup()
+    {
+        InitializeComponent();
+        foreach (var (display, _) in Operators)
+            OperatorComboBox.Items.Add(display);
+        OperatorComboBox.SelectedIndex = 0;
+    }
+
+    public void Initialize(string columnName, ColumnFilterState? existingFilter)
+    {
+        _currentColumnName = columnName;
+        HeaderText.Text = $"Filter: {columnName}";
+
+        if (existingFilter?.IsActive == true)
+        {
+            var idx = Array.FindIndex(Operators, o => o.Op == existingFilter.Operator);
+            OperatorComboBox.SelectedIndex = idx >= 0 ? idx : 0;
+            ValueTextBox.Text = existingFilter.Value;
+        }
+        else
+        {
+            OperatorComboBox.SelectedIndex = 0;
+            ValueTextBox.Text = "";
+        }
+
+        UpdateValueVisibility();
+        ValueTextBox.Focus();
+    }
+
+    private void UpdateValueVisibility()
+    {
+        var idx = OperatorComboBox.SelectedIndex;
+        var op = (idx >= 0 && idx < Operators.Length) ? Operators[idx].Op : FilterOperator.Contains;
+        var showValue = op != FilterOperator.IsEmpty && op != FilterOperator.IsNotEmpty;
+        ValueLabel.IsVisible = showValue;
+        ValueTextBox.IsVisible = showValue;
+    }
+
+    private void OperatorComboBox_SelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        UpdateValueVisibility();
+    }
+
+    private void ApplyFilter()
+    {
+        var idx = OperatorComboBox.SelectedIndex;
+        if (idx < 0 || idx >= Operators.Length) return;
+
+        FilterApplied?.Invoke(this, new FilterAppliedEventArgs
+        {
+            FilterState = new ColumnFilterState
+            {
+                ColumnName = _currentColumnName,
+                Operator   = Operators[idx].Op,
+                Value      = ValueTextBox.Text ?? "",
+            }
+        });
+    }
+
+    private void ApplyButton_Click(object? sender, RoutedEventArgs e) => ApplyFilter();
+
+    private void ClearButton_Click(object? sender, RoutedEventArgs e)
+    {
+        FilterApplied?.Invoke(this, new FilterAppliedEventArgs
+        {
+            FilterState = new ColumnFilterState { ColumnName = _currentColumnName }
+        });
+        FilterCleared?.Invoke(this, EventArgs.Empty);
+    }
+
+    private void ValueTextBox_KeyDown(object? sender, KeyEventArgs e)
+    {
+        if (e.Key == Key.Enter)
+        {
+            ApplyFilter();
+            e.Handled = true;
+        }
+        else if (e.Key == Key.Escape)
+        {
+            FilterCleared?.Invoke(this, EventArgs.Empty);
+            e.Handled = true;
+        }
+    }
+}

src/PlanViewer.App/Controls/ColumnFilterState.cs

@@ -0,0 +1,59 @@
+using System;
+
+namespace PlanViewer.App.Controls;
+
+public enum FilterOperator
+{
+    Contains,
+    Equals,
+    NotEquals,
+    StartsWith,
+    EndsWith,
+    GreaterThan,
+    GreaterThanOrEqual,
+    LessThan,
+    LessThanOrEqual,
+    IsEmpty,
+    IsNotEmpty,
+}
+
+public class ColumnFilterState
+{
+    public string ColumnName { get; set; } = string.Empty;
+    public FilterOperator Operator { get; set; } = FilterOperator.Contains;
+    public string Value { get; set; } = string.Empty;
+
+    public bool IsActive =>
+        !string.IsNullOrEmpty(Value) ||
+        Operator == FilterOperator.IsEmpty ||
+        Operator == FilterOperator.IsNotEmpty;
+
+    public string DisplayText
+    {
+        get
+        {
+            if (!IsActive) return string.Empty;
+
+            return Operator switch
+            {
+                FilterOperator.Contains          => $"Contains '{Value}'",
+                FilterOperator.Equals            => $"= '{Value}'",
+                FilterOperator.NotEquals         => $"!= '{Value}'",
+                FilterOperator.GreaterThan       => $"> {Value}",
+                FilterOperator.GreaterThanOrEqual => $">= {Value}",
+                FilterOperator.LessThan          => $"< {Value}",
+                FilterOperator.LessThanOrEqual   => $"<= {Value}",
+                FilterOperator.StartsWith        => $"Starts with '{Value}'",
+                FilterOperator.EndsWith          => $"Ends with '{Value}'",
+                FilterOperator.IsEmpty           => "Is Empty",
+                FilterOperator.IsNotEmpty        => "Is Not Empty",
+                _                                => Value,
+            };
+        }
+    }
+}
+
+public class FilterAppliedEventArgs : EventArgs
+{
+    public ColumnFilterState FilterState { get; set; } = new ColumnFilterState();
+}

src/PlanViewer.App/Controls/QueryStoreGridControl.axaml

@@ -70,15 +70,16 @@
         <DataGrid Grid.Row="1" x:Name="ResultsGrid"
                   AutoGenerateColumns="False"
                   CanUserSortColumns="True"
-                  CanUserReorderColumns="False"
+                  CanUserReorderColumns="True"
                   CanUserResizeColumns="True"
                   IsReadOnly="False"
                   SelectionMode="Single"
                   GridLinesVisibility="Horizontal"
                   HeadersVisibility="Column"
                   FontSize="11"
                   Background="{DynamicResource BackgroundDarkBrush}"
-                  BorderThickness="0">
+                  BorderThickness="0"
+                  ScrollViewer.HorizontalScrollBarVisibility="Auto">
             <DataGrid.ContextMenu>
                 <ContextMenu>
                     <MenuItem Header="Load Plan" Click="LoadHighlightedPlan_Click"/>
@@ -95,20 +96,20 @@
                 <DataGridTextColumn Header="QueryId" Binding="{ReflectionBinding QueryId}" Width="90"/>
                 <DataGridTextColumn Header="PlanId" Binding="{ReflectionBinding PlanId}" Width="80"/>
                 <DataGridTextColumn Header="Last Executed (Local)" Binding="{ReflectionBinding LastExecutedLocal}" Width="160"/>
-                <DataGridTextColumn Header="Executions" Binding="{ReflectionBinding ExecsDisplay}" Width="100"/>
-                <DataGridTextColumn Header="Total CPU (ms)" Binding="{ReflectionBinding TotalCpuDisplay}" Width="120"/>
-                <DataGridTextColumn Header="Avg CPU (ms)" Binding="{ReflectionBinding AvgCpuDisplay}" Width="110"/>
-                <DataGridTextColumn Header="Total Duration (ms)" Binding="{ReflectionBinding TotalDurDisplay}" Width="150"/>
-                <DataGridTextColumn Header="Avg Duration (ms)" Binding="{ReflectionBinding AvgDurDisplay}" Width="140"/>
-                <DataGridTextColumn Header="Total Reads" Binding="{ReflectionBinding TotalReadsDisplay}" Width="100"/>
-                <DataGridTextColumn Header="Avg Reads" Binding="{ReflectionBinding AvgReadsDisplay}" Width="100"/>
-                <DataGridTextColumn Header="Total Writes" Binding="{ReflectionBinding TotalWritesDisplay}" Width="100"/>
-                <DataGridTextColumn Header="Avg Writes" Binding="{ReflectionBinding AvgWritesDisplay}" Width="100"/>
-                <DataGridTextColumn Header="Total Physical Reads" Binding="{ReflectionBinding TotalPhysReadsDisplay}" Width="155"/>
-                <DataGridTextColumn Header="Avg Physical Reads" Binding="{ReflectionBinding AvgPhysReadsDisplay}" Width="140"/>
-                <DataGridTextColumn Header="Total Memory (MB)" Binding="{ReflectionBinding TotalMemDisplay}" Width="140"/>
-                <DataGridTextColumn Header="Avg Memory (MB)" Binding="{ReflectionBinding AvgMemDisplay}" Width="130"/>
-                <DataGridTemplateColumn Header="Query Text" Width="*">
+                <DataGridTextColumn Header="Executions" Binding="{ReflectionBinding ExecsDisplay}" SortMemberPath="ExecsSort" Width="100"/>
+                <DataGridTextColumn Header="Total CPU (ms)" Binding="{ReflectionBinding TotalCpuDisplay}" SortMemberPath="TotalCpuSort" Width="120"/>
+                <DataGridTextColumn Header="Avg CPU (ms)" Binding="{ReflectionBinding AvgCpuDisplay}" SortMemberPath="AvgCpuSort" Width="110"/>
+                <DataGridTextColumn Header="Total Duration (ms)" Binding="{ReflectionBinding TotalDurDisplay}" SortMemberPath="TotalDurSort" Width="150"/>
+                <DataGridTextColumn Header="Avg Duration (ms)" Binding="{ReflectionBinding AvgDurDisplay}" SortMemberPath="AvgDurSort" Width="140"/>
+                <DataGridTextColumn Header="Total Reads" Binding="{ReflectionBinding TotalReadsDisplay}" SortMemberPath="TotalReadsSort" Width="100"/>
+                <DataGridTextColumn Header="Avg Reads" Binding="{ReflectionBinding AvgReadsDisplay}" SortMemberPath="AvgReadsSort" Width="100"/>
+                <DataGridTextColumn Header="Total Writes" Binding="{ReflectionBinding TotalWritesDisplay}" SortMemberPath="TotalWritesSort" Width="100"/>
+                <DataGridTextColumn Header="Avg Writes" Binding="{ReflectionBinding AvgWritesDisplay}" SortMemberPath="AvgWritesSort" Width="100"/>
+                <DataGridTextColumn Header="Total Physical Reads" Binding="{ReflectionBinding TotalPhysReadsDisplay}" SortMemberPath="TotalPhysReadsSort" Width="155"/>
+                <DataGridTextColumn Header="Avg Physical Reads" Binding="{ReflectionBinding AvgPhysReadsDisplay}" SortMemberPath="AvgPhysReadsSort" Width="140"/>
+                <DataGridTextColumn Header="Total Memory (MB)" Binding="{ReflectionBinding TotalMemDisplay}" SortMemberPath="TotalMemSort" Width="140"/>
+                <DataGridTextColumn Header="Avg Memory (MB)" Binding="{ReflectionBinding AvgMemDisplay}" SortMemberPath="AvgMemSort" Width="130"/>
+                <DataGridTemplateColumn Header="Query Text" Width="300" MinWidth="300">
                     <DataGridTemplateColumn.CellTemplate>
                         <DataTemplate x:DataType="local:QueryStoreRow">
                             <TextBlock Text="{Binding QueryPreview}"