Move Common functionality to Core project & rendering and Model support as well

PckStudio.Core/Extensions/CursorExtensions.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace PckStudio.Core.Extensions
+{
+    public static class CursorExtensions
+    {
+
+        [StructLayout(LayoutKind.Sequential)]
+        struct PointStruct
+        {
+            public Int32 x;
+            public Int32 y;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        struct CursorInfoStruct
+        {
+            /// <summary> The structure size in bytes that must be set via calling Marshal.SizeOf(typeof(CursorInfoStruct)).</summary>
+            public Int32 cbSize;
+            /// <summary> The cursor state: 0 == hidden, 1 == showing, 2 == suppressed (is supposed to be when finger touch is used, but in practice finger touch results in 0, not 2)</summary>
+            public Int32 flags;
+            /// <summary> A handle to the cursor. </summary>
+            public IntPtr hCursor;
+            /// <summary> The cursor screen coordinates.</summary>
+            public PointStruct pt;
+        }
+
+        /// <summary> Must initialize cbSize</summary>
+        [DllImport("user32.dll")]
+        static extern bool GetCursorInfo(ref CursorInfoStruct pci);
+
+        public static bool IsVisible(this Cursor _)
+        {
+            CursorInfoStruct pci = new CursorInfoStruct();
+            pci.cbSize = Marshal.SizeOf(typeof(CursorInfoStruct));
+            GetCursorInfo(ref pci);
+            // const Int32 hidden = 0x00;
+            const Int32 showing = 0x01;
+            // const Int32 suppressed = 0x02;
+            bool isVisible = ((pci.flags & showing) != 0);
+            return isVisible;
+        }
+
+    }
+}