Port DataGridView control from WinForms to Modern.Forms

samples/ControlGallery/MainForm.cs

@@ -22,6 +22,7 @@ public MainForm ()
             tree.Items.Add ("Button", ImageLoader.Get ("button.png"));
             tree.Items.Add ("CheckBox", ImageLoader.Get ("button.png"));
             tree.Items.Add ("ComboBox", ImageLoader.Get ("button.png"));
+            tree.Items.Add ("DataGridView", ImageLoader.Get ("button.png"));
             tree.Items.Add ("Dialogs", ImageLoader.Get ("button.png"));
             tree.Items.Add ("FileDialogs", ImageLoader.Get ("button.png"));
             tree.Items.Add ("FlowLayoutPanel", ImageLoader.Get ("button.png"));
@@ -90,6 +91,8 @@ private void Tree_ItemSelected (object? sender, EventArgs<TreeViewItem> e)
                     return new CheckBoxPanel ();
                 case "ComboBox":
                     return new ComboBoxPanel ();
+                case "DataGridView":
+                    return new DataGridViewPanel ();
                 case "Dialogs":
                     return new DialogPanel ();
                 case "FileDialogs":

samples/ControlGallery/Panels/DataGridViewPanel.cs

@@ -0,0 +1,92 @@
+using Modern.Forms;
+using SkiaSharp;
+
+namespace ControlGallery.Panels
+{
+    public class DataGridViewPanel : BasePanel
+    {
+        public DataGridViewPanel ()
+        {
+            Controls.Add (new Label { Text = "DataGridView - Cell Selection with Row Headers (Tab/Shift-Tab to navigate, double-click or F2 to edit)", Left = 10, Top = 10, Width = 760 });
+
+            var dgv1 = new DataGridView {
+                Left = 10,
+                Top = 30,
+                Width = 750,
+                Height = 250,
+                SelectionMode = DataGridViewSelectionMode.CellSelect,
+                ColumnHeadersHeight = 36,
+                RowHeadersVisible = true,
+                RowHeadersWidth = 30
+            };
+
+            // Customize column header style
+            dgv1.ColumnHeadersDefaultCellStyle.BackgroundColor = Theme.AccentColor;
+            dgv1.ColumnHeadersDefaultCellStyle.ForegroundColor = SKColors.White;
+
+            // Customize alternating row style
+            dgv1.AlternatingRowsDefaultCellStyle.BackgroundColor = new SKColor (150, 200, 225);
+
+            dgv1.Columns.Add ("Name", 150);
+            dgv1.Columns.Add ("Age", 60);
+            dgv1.Columns.Add ("City", 120);
+            dgv1.Columns.Add ("Occupation", 150);
+            dgv1.Columns.Add ("Email", 200);
+
+            dgv1.Rows.Add ("Alice Johnson", "32", "New York", "Engineer", "alice@example.com");
+            dgv1.Rows.Add ("Bob Smith", "45", "Los Angeles", "Designer", "bob@example.com");
+            dgv1.Rows.Add ("Carol Williams", "28", "Chicago", "Teacher", "carol@example.com");
+            dgv1.Rows.Add ("David Brown", "51", "Houston", "Doctor", "david@example.com");
+            dgv1.Rows.Add ("Eve Davis", "39", "Phoenix", "Lawyer", "eve@example.com");
+            dgv1.Rows.Add ("Frank Miller", "22", "Philadelphia", "Student", "frank@example.com");
+            dgv1.Rows.Add ("Grace Wilson", "36", "San Antonio", "Architect", "grace@example.com");
+            dgv1.Rows.Add ("Henry Moore", "48", "San Diego", "Manager", "henry@example.com");
+            dgv1.Rows.Add ("Ivy Taylor", "31", "Dallas", "Analyst", "ivy@example.com");
+            dgv1.Rows.Add ("Jack Anderson", "55", "San Jose", "Director", "jack@example.com");
+            dgv1.Rows.Add ("Karen Thomas", "42", "Austin", "Consultant", "karen@example.com");
+            dgv1.Rows.Add ("Leo Jackson", "27", "Jacksonville", "Developer", "leo@example.com");
+            dgv1.Rows.Add ("Mia White", "34", "Fort Worth", "Scientist", "mia@example.com");
+            dgv1.Rows.Add ("Noah Harris", "60", "Columbus", "Professor", "noah@example.com");
+            dgv1.Rows.Add ("Olivia Martin", "25", "Charlotte", "Intern", "olivia@example.com");
+
+            dgv1.SelectedRowIndex = 2;
+            dgv1.SelectedColumnIndex = 0;
+
+            Controls.Add (dgv1);
+
+            Controls.Add (new Label { Text = "DataGridView - Full Row Selection + Data Binding (column resizing disabled)", Left = 10, Top = 300, Width = 500 });
+
+            var dgv3 = new DataGridView {
+                Left = 10,
+                Top = 320,
+                Width = 500,
+                Height = 200,
+                SelectionMode = DataGridViewSelectionMode.FullRowSelect,
+                AllowUserToResizeColumns = false
+            };
+
+            var products = new List<Product> {
+                new Product { Name = "Widget", Price = 9.99, Quantity = 100, Category = "Hardware" },
+                new Product { Name = "Gadget", Price = 24.95, Quantity = 50, Category = "Electronics" },
+                new Product { Name = "Doohickey", Price = 4.50, Quantity = 200, Category = "Hardware" },
+                new Product { Name = "Thingamajig", Price = 15.00, Quantity = 75, Category = "Electronics" },
+                new Product { Name = "Whatchamacallit", Price = 7.25, Quantity = 150, Category = "Misc" },
+                new Product { Name = "Contraption", Price = 49.99, Quantity = 10, Category = "Electronics" },
+                new Product { Name = "Gizmo", Price = 12.50, Quantity = 80, Category = "Hardware" },
+                new Product { Name = "Doodad", Price = 3.75, Quantity = 300, Category = "Misc" }
+            };
+
+            dgv3.DataSource = products;
+
+            Controls.Add (dgv3);
+        }
+
+        private sealed class Product
+        {
+            public string Name { get; set; } = string.Empty;
+            public double Price { get; set; }
+            public int Quantity { get; set; }
+            public string Category { get; set; } = string.Empty;
+        }
+    }
+}

src/Modern.Forms/Control.Events.cs

@@ -20,6 +20,7 @@ public partial class Control
     private static readonly object s_doubleClickEvent = new object ();
     private static readonly object s_enabledChangedEvent = new object ();
     private static readonly object s_gotFocusEvent = new object ();
+    private static readonly object s_lostFocusEvent = new object ();
     private static readonly object s_invalidatedEvent = new object ();
     private static readonly object s_keyDownEvent = new object ();
     private static readonly object s_keyPressEvent = new object ();
@@ -130,6 +131,14 @@ public event EventHandler<EventArgs<Rectangle>>? Invalidated {
         remove => Events.RemoveHandler (s_invalidatedEvent, value);
     }
 
+    /// <summary>
+    /// Raised when the control loses focus.
+    /// </summary>
+    public event EventHandler? LostFocus {
+        add => Events.AddHandler (s_lostFocusEvent, value);
+        remove => Events.RemoveHandler (s_lostFocusEvent, value);
+    }
+
     /// <summary>
     /// Raised when the user presses down a key.
     /// </summary>

src/Modern.Forms/Control.cs

@@ -990,7 +990,10 @@ protected virtual void OnCreateControl ()
         /// <summary>
         /// Called when the control is deselected.
         /// </summary>
-        protected virtual void OnDeselected (EventArgs e) { }
+        protected virtual void OnDeselected (EventArgs e)
+        {
+            OnLostFocus (e);
+        }
 
         /// <summary>
         /// Raises the DoubleClick event.
@@ -1023,6 +1026,11 @@ protected virtual void OnEnabledChanged (EventArgs e)
         /// </summary>
         protected virtual void OnInvalidated (EventArgs<Rectangle> e) => (Events[s_invalidatedEvent] as EventHandler<EventArgs<Rectangle>>)?.Invoke (this, e);
 
+        /// <summary>
+        /// Raises the LostFocus event.
+        /// </summary>
+        protected virtual void OnLostFocus (EventArgs e) => (Events[s_lostFocusEvent] as EventHandler)?.Invoke (this, e);
+
         /// <summary>
         /// Raises the KeyDown event.
         /// </summary>