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JohanLarssonJohanLarsson
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Three state sort as attached property.
1 parent fa11f8d commit 7fac606

8 files changed

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‎Gu.Wpf.DataGrid2D.Demo/Gu.Wpf.DataGrid2D.Demo.csproj‎

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<Compile Include="Array2DView.xaml.cs">
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<DependentUpon>Array2DView.xaml</DependentUpon>
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</Compile>
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<Compile Include="ThreeStateSortItem.cs">
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<DependentUpon>ThreeStateSortView.xaml</DependentUpon>
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</Compile>
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<Compile Include="ThreeStateSortView.xaml.cs">
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<DependentUpon>ThreeStateSortView.xaml</DependentUpon>
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</Compile>
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<Compile Include="ThreeStateSortViewModel.cs" />
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<Compile Include="TransposedView.xaml.cs">
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<DependentUpon>TransposedView.xaml</DependentUpon>
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</Compile>
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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<Page Include="ThreeStateSortView.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>
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</Page>
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<Page Include="TransposedView.xaml">
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<SubType>Designer</SubType>
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<Generator>MSBuild:Compile</Generator>

‎Gu.Wpf.DataGrid2D.Demo/MainWindow.xaml‎

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<TabItem AutomationProperties.AutomationId="{x:Static demo:AutomationIds.CellTemplateTab}" Header="CellTemplate">
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<demo:CellTemplateView />
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</TabItem>
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<TabItem Header="sort">
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<demo:ThreeStateSortView />
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</TabItem>
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</TabControl>
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</Window>

‎Gu.Wpf.DataGrid2D.Demo/ThreeStateSortItem.cs‎

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namespace Gu.Wpf.DataGrid2D.Demo
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{
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using System.ComponentModel;
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using System.Runtime.CompilerServices;
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using JetBrains.Annotations;
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public class ThreeStateSortItem : INotifyPropertyChanged
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{
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private string stringValue;
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private int intValue;
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public event PropertyChangedEventHandler PropertyChanged;
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public string StringValue
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{
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get
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{
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return this.stringValue;
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}
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set
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{
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if (value == this.stringValue)
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{
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return;
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}
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this.stringValue = value;
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this.OnPropertyChanged();
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}
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}
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public int IntValue
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{
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get
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{
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return this.intValue;
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}
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set
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{
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if (value == this.intValue)
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{
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return;
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}
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this.intValue = value;
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this.OnPropertyChanged();
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}
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}
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[NotifyPropertyChangedInvocator]
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protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
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{
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this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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}
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}

‎Gu.Wpf.DataGrid2D.Demo/ThreeStateSortView.xaml‎

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<UserControl x:Class="Gu.Wpf.DataGrid2D.Demo.ThreeStateSortView"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:dataGrid2D="http://gu.se/DataGrid2D"
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xmlns:local="clr-namespace:Gu.Wpf.DataGrid2D.Demo"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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d:DesignHeight="300"
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d:DesignWidth="300"
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mc:Ignorable="d">
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<UserControl.DataContext>
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<local:ThreeStateSortViewModel />
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</UserControl.DataContext>
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<DataGrid dataGrid2D:Sort.ThreeState="True" ItemsSource="{Binding Items}" />
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</UserControl>

‎Gu.Wpf.DataGrid2D.Demo/ThreeStateSortView.xaml.cs‎

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namespace Gu.Wpf.DataGrid2D.Demo
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{
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using System.Windows.Controls;
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/// <summary>
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/// Interaction logic for ThreeStateSortView.xaml
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/// </summary>
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public partial class ThreeStateSortView : UserControl
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{
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public ThreeStateSortView()
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{
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this.InitializeComponent();
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}
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}
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}

‎Gu.Wpf.DataGrid2D.Demo/ThreeStateSortViewModel.cs‎

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namespace Gu.Wpf.DataGrid2D.Demo
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{
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using System.Collections.ObjectModel;
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public class ThreeStateSortViewModel
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{
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public ThreeStateSortViewModel()
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{
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this.Items = new ObservableCollection<ThreeStateSortItem>
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{
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new ThreeStateSortItem {StringValue = "a", IntValue = 1},
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new ThreeStateSortItem {StringValue = "c", IntValue = 4},
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new ThreeStateSortItem {StringValue = "d", IntValue = 2},
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new ThreeStateSortItem {StringValue = "b", IntValue = 3},
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};
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}
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public ObservableCollection<ThreeStateSortItem> Items { get; }
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}
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}

‎Gu.Wpf.DataGrid2D/Gu.Wpf.DataGrid2D.csproj‎

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<Compile Include="ItemsSource.Array2D.cs" />
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<Compile Include="RowColumnIndex.cs" />
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<Compile Include="RowColumnIndexConverter.cs" />
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<Compile Include="Sort.cs" />
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<Compile Include="Views\Array2DRowView.cs" />
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<Compile Include="Views\Array2DView.cs" />
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<Compile Include="Views\Array2DIndexPropertyDescriptor.cs" />

‎Gu.Wpf.DataGrid2D/Sort.cs‎

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namespace Gu.Wpf.DataGrid2D
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{
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using System;
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using System.ComponentModel;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Input;
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public class Sort
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{
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public static readonly DependencyProperty ThreeStateProperty = DependencyProperty.RegisterAttached(
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"ThreeState",
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typeof(bool),
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typeof(Sort),
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new PropertyMetadata(default(bool), OnThreeStateChanged));
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private static readonly DependencyProperty SubscriptionProperty = DependencyProperty.RegisterAttached(
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"Subscription",
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typeof(SortingSubscription),
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typeof(Sort),
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new PropertyMetadata(default(SortingSubscription)));
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public static void SetThreeState(DependencyObject element, bool value)
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{
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element.SetValue(ThreeStateProperty, value);
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}
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public static bool GetThreeState(DependencyObject element)
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{
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return (bool)element.GetValue(ThreeStateProperty);
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}
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private static void OnThreeStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if ((bool)e.NewValue)
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{
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d.SetCurrentValue(SubscriptionProperty, new SortingSubscription((DataGrid)d));
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}
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else
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{
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(d.GetValue(SubscriptionProperty) as IDisposable)?.Dispose();
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d.ClearValue(SubscriptionProperty);
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}
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}
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private static void OnDataGridSorting(object sender, DataGridSortingEventArgs e)
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{
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var dataGrid = (DataGrid)sender;
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var sortPropertyName = e.Column.SortMemberPath;
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if (!string.IsNullOrEmpty(sortPropertyName))
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{
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// sorting is cleared when the previous state is Descending
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if (e.Column.SortDirection.HasValue && e.Column.SortDirection.Value == ListSortDirection.Descending)
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{
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e.Column.SetCurrentValue(DataGridColumn.SortDirectionProperty, null);
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if ((Keyboard.Modifiers & ModifierKeys.Shift) != ModifierKeys.Shift)
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{
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var sortDescriptions = dataGrid.Items.SortDescriptions;
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for (var i = sortDescriptions.Count - 1; i >= 0; i--)
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{
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if (sortDescriptions[i].PropertyName == sortPropertyName)
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{
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sortDescriptions.RemoveAt(i);
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}
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}
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}
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else
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{
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dataGrid.Items.SortDescriptions.Clear();
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}
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dataGrid.Items.Refresh();
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e.Handled = true;
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}
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}
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}
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private sealed class SortingSubscription : IDisposable
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{
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private readonly DataGrid dataGrid;
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public SortingSubscription(DataGrid dataGrid)
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{
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this.dataGrid = dataGrid;
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this.dataGrid.Sorting += OnDataGridSorting;
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}
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public void Dispose()
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{
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this.dataGrid.Sorting -= OnDataGridSorting;
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}
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}
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}
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}

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