no more submodule

GtkSharp/Source/Samples/Sections/Widgets/CompositeWidgetSection.cs

@@ -0,0 +1,47 @@
+using System;
+using Gtk;
+
+namespace Samples
+{
+    [Section(ContentType = typeof(CompositeWidget), Category = Category.Widgets)]
+    class CompositeWidgetSection : ListSection
+    {
+        public CompositeWidgetSection()
+        {
+            AddItem("CompositeWidget:", new CompositeWidget());
+            AddItem("Other instance:", new CompositeWidget());
+        }
+    }
+
+    [Template("CompositeWidget.glade", true)]
+    [GLib.TypeName(nameof(CompositeWidget))]
+    class CompositeWidget : Bin
+    {
+#pragma warning disable CS0649, CS0169
+        [Child] Button btn1;
+        [Child] Button btn2;
+        [Child("label")] Entry entry;
+#pragma warning restore CS0649, CS0169
+
+        public CompositeWidget()
+        {
+            // Base constructor sets [Child] fields
+            // if [Template(throwOnUnknownChild = true) and GTK can't bind any [Child] field then base constructor throws
+            // GTK writes invalid field/widget name in console (project <OutputType> must be Exe to see console on Windows OS)
+            System.Diagnostics.Debug.Assert(btn1 != null);
+            System.Diagnostics.Debug.Assert(btn2 != null);
+            System.Diagnostics.Debug.Assert(entry != null);
+        }
+
+        private void on_btn1_clicked(object sender, EventArgs e)
+        {
+            entry.Text = DateTime.Now.ToString();
+            ApplicationOutput.WriteLine(this, "Instance handler clicked");
+        }
+
+        private static void on_btn2_clicked(object sender, EventArgs e)
+        {
+            ApplicationOutput.WriteLine("Static handler clicked");
+        }
+    }
+}