Single click edit.

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

@@ -111,6 +111,15 @@
     <Compile Include="Array2DView.xaml.cs">
       <DependentUpon>Array2DView.xaml</DependentUpon>
     </Compile>
+    <Compile Include="SingleClickEditItem.cs">
+      <DependentUpon>SingleClickEditView.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="SingleClickEditView.xaml.cs">
+      <DependentUpon>SingleClickEditView.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="SingleClickEditViewModel.cs">
+      <DependentUpon>SingleClickEditView.xaml</DependentUpon>
+    </Compile>
     <Compile Include="TransposedView.xaml.cs">
       <DependentUpon>TransposedView.xaml</DependentUpon>
     </Compile>
@@ -166,6 +175,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="SingleClickEditView.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="TransposedView.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

Gu.Wpf.DataGrid2D.Demo/MainWindow.xaml

@@ -41,5 +41,9 @@
         <TabItem AutomationProperties.AutomationId="{x:Static demo:AutomationIds.CellTemplateTab}" Header="CellTemplate">
             <demo:CellTemplateView />
         </TabItem>
+
+        <TabItem Header="Single click edit.">
+            <demo:SingleClickEditView />
+        </TabItem>
     </TabControl>
 </Window>

Gu.Wpf.DataGrid2D.Demo/SingleClickEditItem.cs

@@ -0,0 +1,75 @@
+namespace Gu.Wpf.DataGrid2D.Demo
+{
+    using System.ComponentModel;
+    using System.Runtime.CompilerServices;
+    using JetBrains.Annotations;
+
+    public class SingleClickEditItem : INotifyPropertyChanged
+    {
+        private string stringValue;
+        private int intValue;
+        private bool boolValue;
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        public string StringValue
+        {
+            get
+            {
+                return this.stringValue;
+            }
+
+            set
+            {
+                if (value == this.stringValue)
+                {
+                    return;
+                }
+                this.stringValue = value;
+                this.OnPropertyChanged();
+            }
+        }
+
+        public int IntValue
+        {
+            get
+            {
+                return this.intValue;
+            }
+
+            set
+            {
+                if (value == this.intValue)
+                {
+                    return;
+                }
+                this.intValue = value;
+                this.OnPropertyChanged();
+            }
+        }
+
+        public bool BoolValue
+        {
+            get
+            {
+                return this.boolValue;
+            }
+
+            set
+            {
+                if (value == this.boolValue)
+                {
+                    return;
+                }
+                this.boolValue = value;
+                this.OnPropertyChanged();
+            }
+        }
+
+        [NotifyPropertyChangedInvocator]
+        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        {
+            this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}

Gu.Wpf.DataGrid2D.Demo/SingleClickEditView.xaml

@@ -0,0 +1,17 @@
+<UserControl x:Class="Gu.Wpf.DataGrid2D.Demo.SingleClickEditView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:dataGrid2D="http://gu.se/DataGrid2D"
+             xmlns:local="clr-namespace:Gu.Wpf.DataGrid2D.Demo"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             d:DesignHeight="300"
+             d:DesignWidth="300"
+             mc:Ignorable="d">
+    <UserControl.DataContext>
+        <local:SingleClickEditViewModel />
+    </UserControl.DataContext>
+    <Grid>
+        <DataGrid dataGrid2D:SingleClick.Edit="True" ItemsSource="{Binding Items}" SelectionUnit="FullRow" />
+    </Grid>
+</UserControl>

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

@@ -0,0 +1,15 @@
+namespace Gu.Wpf.DataGrid2D.Demo
+{
+    using System.Windows.Controls;
+
+    /// <summary>
+    /// Interaction logic for SingleClickEditView.xaml
+    /// </summary>
+    public partial class SingleClickEditView : UserControl
+    {
+        public SingleClickEditView()
+        {
+            InitializeComponent();
+        }
+    }
+}

Gu.Wpf.DataGrid2D.Demo/SingleClickEditViewModel.cs

@@ -0,0 +1,18 @@
+namespace Gu.Wpf.DataGrid2D.Demo
+{
+    using System.Collections.ObjectModel;
+
+    public class SingleClickEditViewModel
+    {
+        public SingleClickEditViewModel()
+        {
+            this.Items = new ObservableCollection<SingleClickEditItem>
+                    {
+                        new SingleClickEditItem(),
+                        new SingleClickEditItem(),
+                    };
+        }
+
+        public ObservableCollection<SingleClickEditItem> Items { get;  }
+    }
+}

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

@@ -66,6 +66,7 @@
     <Compile Include="ItemsSource.Array2D.cs" />
     <Compile Include="RowColumnIndex.cs" />
     <Compile Include="RowColumnIndexConverter.cs" />
+    <Compile Include="SingleClick.cs" />
     <Compile Include="Views\Array2DRowView.cs" />
     <Compile Include="Views\Array2DView.cs" />
     <Compile Include="Views\Array2DIndexPropertyDescriptor.cs" />

Gu.Wpf.DataGrid2D/SingleClick.cs

@@ -0,0 +1,60 @@
+namespace Gu.Wpf.DataGrid2D
+{
+    using System.Linq;
+    using System.Windows;
+    using System.Windows.Controls;
+
+    public static class SingleClick
+    {
+        public static readonly DependencyProperty EditProperty = DependencyProperty.RegisterAttached(
+            "Edit",
+            typeof(bool),
+            typeof(SingleClick),
+            new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.Inherits));
+
+        static SingleClick()
+        {
+            EventManager.RegisterClassHandler(typeof(DataGridCell), UIElement.PreviewMouseLeftButtonDownEvent, new RoutedEventHandler(OnPreviewMouseLeftButtonDown));
+        }
+
+        public static void SetEdit(DependencyObject element, bool value)
+        {
+            element.SetValue(EditProperty, value);
+        }
+
+        public static bool GetEdit(DependencyObject element)
+        {
+            return (bool)element.GetValue(EditProperty);
+        }
+
+        private static void OnPreviewMouseLeftButtonDown(object sender, RoutedEventArgs e)
+        {
+            var cell = (DataGridCell)sender;
+            if (GetEdit(cell) && !cell.IsReadOnly && !cell.IsEditing)
+            {
+                var dataGrid = cell.Ancestors()
+                                   .OfType<DataGrid>()
+                                   .FirstOrDefault();
+                if (dataGrid == null)
+                {
+                    return;
+                }
+
+                dataGrid.BeginEdit();
+                if (dataGrid.SelectionUnit == DataGridSelectionUnit.FullRow)
+                {
+                    cell.Ancestors()
+                        .OfType<DataGridRow>()
+                        .FirstOrDefault()
+                        ?.SetCurrentValue(DataGridRow.IsSelectedProperty, true);
+                }
+                else
+                {
+                    cell.SetCurrentValue(DataGridCell.IsSelectedProperty, true);
+                }
+
+                cell.Focus();
+            }
+        }
+    }
+}