no more submodule

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

@@ -0,0 +1,32 @@
+// This is free and unencumbered software released into the public domain.
+// Happy coding!!! - GtkSharp Team
+
+using Gtk;
+
+namespace Samples
+{
+    [Section(ContentType = typeof(SpinButton), Category = Category.Widgets)]
+    class SpinButtonSection : ListSection
+    {
+        public SpinButtonSection()
+        {
+            AddItem(CreateSpinButton());
+        }
+
+        public (string, Widget) CreateSpinButton()
+        {
+            // Spinbutton constructor takes MinValue, MaxValue and StepValue 
+            var btn = new SpinButton(0, 1000, 1);
+
+            // Button constructor also takes the adjustment object
+            // and it can be redefined any time like CurrentVal, MinVal, MaxVal, Step, PageStep, PageSize
+            btn.Adjustment.Configure(888, 0, 1000, 1, 100, 0);
+
+            // Default values are double, use ValueAsInt method to get Int
+            btn.ValueChanged += (sender, e) =>
+                ApplicationOutput.WriteLine(sender, $"Spin button changed: {btn.ValueAsInt}");
+
+            return ("Spin button:", btn);
+        }
+    }
+}