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* Change namespace to prevent conflicts. The `DataGrid` in the namespace name was hiding the `DataGrid` type. * Initial impl of bindable DataGridRow.IsSelected. * Make DataGridRow.IsSelected two-way bindable.pull/16568/head
Steven Kirk
2 years ago
committed by
GitHub
GitHub
8 changed files with 220 additions and 29 deletions
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using System; |
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using System.Collections; |
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using System.Collections.Generic; |
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using System.Linq; |
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using Avalonia.Data; |
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using Avalonia.Markup.Xaml.Styling; |
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using Avalonia.Styling; |
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using Avalonia.UnitTests; |
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using Avalonia.VisualTree; |
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using Xunit; |
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#nullable enable |
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namespace Avalonia.Controls.DataGridTests; |
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public class DataGridRowTests |
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{ |
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[Fact] |
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public void IsSelected_Binding_Works_For_Initial_Rows() |
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{ |
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using var app = Start(); |
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var items = Enumerable.Range(0, 100).Select(x => new Model($"Item {x}")).ToList(); |
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items[2].IsSelected = true; |
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var target = CreateTarget(items, [IsSelectedBinding()]); |
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var rows = GetRows(target); |
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Assert.Equal(0, GetFirstRealizedRowIndex(target)); |
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Assert.Equal(4, GetLastRealizedRowIndex(target)); |
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Assert.All(rows, x => Assert.Equal(x.Index == 2, x.IsSelected)); |
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} |
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[Fact] |
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public void IsSelected_Binding_Works_For_Rows_Scrolled_Into_View() |
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{ |
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using var app = Start(); |
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var items = Enumerable.Range(0, 100).Select(x => new Model($"Item {x}")).ToList(); |
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items[10].IsSelected = true; |
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var target = CreateTarget(items, [IsSelectedBinding()]); |
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var rows = GetRows(target); |
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Assert.Equal(0, GetFirstRealizedRowIndex(target)); |
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Assert.Equal(4, GetLastRealizedRowIndex(target)); |
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target.ScrollIntoView(items[10], target.Columns[0]); |
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target.UpdateLayout(); |
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Assert.Equal(6, GetFirstRealizedRowIndex(target)); |
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Assert.Equal(10, GetLastRealizedRowIndex(target)); |
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Assert.All(rows, x => Assert.Equal(x.Index == 10, x.IsSelected)); |
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} |
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[Fact] |
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public void Can_Toggle_IsSelected_Via_Binding() |
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{ |
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using var app = Start(); |
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var items = Enumerable.Range(0, 100).Select(x => new Model($"Item {x}")).ToList(); |
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items[2].IsSelected = true; |
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var target = CreateTarget(items, [IsSelectedBinding()]); |
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var rows = GetRows(target); |
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Assert.Equal(0, GetFirstRealizedRowIndex(target)); |
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Assert.Equal(4, GetLastRealizedRowIndex(target)); |
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Assert.All(rows, x => Assert.Equal(x.Index == 2, x.IsSelected)); |
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items[2].IsSelected = false; |
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Assert.All(rows, x => Assert.False(x.IsSelected)); |
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} |
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[Fact] |
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public void Can_Toggle_IsSelected_Via_DataGrid() |
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{ |
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using var app = Start(); |
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var items = Enumerable.Range(0, 100).Select(x => new Model($"Item {x}")).ToList(); |
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items[2].IsSelected = true; |
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var target = CreateTarget(items, [IsSelectedBinding()]); |
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var rows = GetRows(target); |
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Assert.Equal(0, GetFirstRealizedRowIndex(target)); |
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Assert.Equal(4, GetLastRealizedRowIndex(target)); |
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Assert.All(rows, x => Assert.Equal(x.Index == 2, x.IsSelected)); |
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target.SelectedItems.Remove(items[2]); |
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Assert.All(rows, x => Assert.False(x.IsSelected)); |
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Assert.False(items[2].IsSelected); |
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} |
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private static IDisposable Start() |
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{ |
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return UnitTestApplication.Start(TestServices.StyledWindow); |
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} |
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private static DataGrid CreateTarget( |
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IList items, |
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IEnumerable<Style>? styles = null) |
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{ |
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var root = new TestRoot |
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{ |
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ClientSize = new(100, 100), |
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Styles = |
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{ |
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new StyleInclude((Uri?)null) |
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{ |
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Source = new Uri("avares://Avalonia.Controls.DataGrid/Themes/Simple.xaml") |
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}, |
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} |
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}; |
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var target = new DataGrid |
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{ |
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Columns = |
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{ |
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new DataGridTextColumn { Header = "Name", Binding = new Binding("Name") } |
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}, |
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ItemsSource = items |
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}; |
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if (styles is not null) |
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{ |
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foreach (var style in styles) |
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target.Styles.Add(style); |
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} |
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root.Child = target; |
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root.ExecuteInitialLayoutPass(); |
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return target; |
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} |
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private static int GetFirstRealizedRowIndex(DataGrid target) |
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{ |
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return target.GetSelfAndVisualDescendants().OfType<DataGridRow>().Select(x => x.Index).Min(); |
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} |
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private static int GetLastRealizedRowIndex(DataGrid target) |
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{ |
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return target.GetSelfAndVisualDescendants().OfType<DataGridRow>().Select(x => x.Index).Max(); |
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} |
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private static IReadOnlyList<DataGridRow> GetRows(DataGrid target) |
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{ |
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return target.GetSelfAndVisualDescendants().OfType<DataGridRow>().ToList(); |
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} |
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private static Style IsSelectedBinding() |
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{ |
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return new Style(x => x.OfType<DataGridRow>()) |
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{ |
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Setters = { new Setter(DataGridRow.IsSelectedProperty, new Binding("IsSelected", BindingMode.TwoWay)) } |
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}; |
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} |
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private class Model : NotifyingBase |
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{ |
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private bool _isSelected; |
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private string _name; |
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public Model(string name) => _name = name; |
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public bool IsSelected |
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{ |
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get => _isSelected; |
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set => SetField(ref _isSelected, value); |
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} |
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public string Name |
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{ |
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get => _name; |
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set => SetField(ref _name, value); |
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} |
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} |
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} |
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