Create Suspend/ResumeDrawing control extensions

Author: Morilli

src/BizHawk.Client.EmuHawk/Extensions/ControlExtensions.cs

@@ -23,6 +23,8 @@ namespace BizHawk.Client.EmuHawk
 {
 	public static class ControlExtensions
 	{
+		private const int WM_SETREDRAW = 0x000B;
+
 		/// <exception cref="ArgumentException"><typeparamref name="T"/> does not inherit <see cref="Enum"/></exception>
 		public static void PopulateFromEnum<T>(this ComboBox box, T enumVal)
 			where T : Enum
@@ -199,6 +201,22 @@ public static CheckState ToCheckState(this bool? tristate)
 				false => CheckState.Unchecked,
 				null => CheckState.Indeterminate,
 			};
+
+		public static void SuspendDrawing(this Control control)
+		{
+			if (!OSTailoredCode.IsUnixHost)
+			{
+				WmImports.SendMessageW(control.Handle, WM_SETREDRAW, (IntPtr) 0, IntPtr.Zero);
+			}
+		}
+
+		public static void ResumeDrawing(this Control control)
+		{
+			if (!OSTailoredCode.IsUnixHost)
+			{
+				WmImports.SendMessageW(control.Handle, WM_SETREDRAW, (IntPtr) 1, IntPtr.Zero);
+			}
+		}
 	}
 
 	public static class ListViewExtensions

src/BizHawk.Client.EmuHawk/tools/SNES/SNESGraphicsDebugger.cs

@@ -873,12 +873,7 @@ private void viewer_MouseDown(object sender, MouseEventArgs e)
 		private void Freeze()
 		{
 			groupFreeze.SuspendLayout();
-
-			if (!OSTailoredCode.IsUnixHost)
-			{
-				// WM_SETREDRAW false
-				WmImports.SendMessageW(groupFreeze.Handle, 11, (IntPtr)0, IntPtr.Zero);
-			}
+			groupFreeze.SuspendDrawing();
 
 			var tp = tabctrlDetails.SelectedTab;
 
@@ -895,12 +890,7 @@ private void Freeze()
 			if (tp == tpOBJ) groupFreeze.Text = "Freeze - OBJ";
 
 			groupFreeze.ResumeLayout();
-
-			if (!OSTailoredCode.IsUnixHost)
-			{
-				// WM_SETREDRAW true
-				WmImports.SendMessageW(groupFreeze.Handle, 11, (IntPtr)1, IntPtr.Zero);
-			}
+			groupFreeze.ResumeDrawing();
 
 			groupFreeze.Refresh();
 		}