Add/Show pad fixes

src/VS4Mac.SkiaSharpFiddle/Commands/SkiaSharpFiddleCommand.cs

@@ -1,5 +1,8 @@
-using MonoDevelop.Components.Commands;
+using System;
+using System.Linq;
+using MonoDevelop.Components.Commands;
 using MonoDevelop.Ide;
+using MonoDevelop.Ide.Gui;
 using VS4Mac.SkiaSharpFiddle.Controllers;
 using VS4Mac.SkiaSharpFiddle.Views;
 
@@ -7,12 +10,48 @@ namespace VS4Mac.SkiaSharpFiddle.Commands
 {
     public class SkiaSharpFiddleCommand : CommandHandler
     {
+        const string PadId = "SkiaSharpFiddler.Pad";
+
         protected override void Run()
         {
-            var skiaSharpFiddleView = new SkiaSharpFiddleView();
-            var skiaSharpFiddleController = new SkiaSharpFiddleController(skiaSharpFiddleView);
+            var pad = GetActivePad();
 
-            IdeApp.Workbench.ShowPad(skiaSharpFiddleView, "SkiaFiddle.Pad", "SkiaFiddle", "Right", null);
+            if (pad == null)
+            {
+                var skiaSharpFiddleView = new SkiaSharpFiddleView();
+                var skiaSharpFiddleController = new SkiaSharpFiddleController(skiaSharpFiddleView);
+
+                pad = IdeApp.Workbench.ShowPad(skiaSharpFiddleView, PadId, "SkiaSharp Fiddler", "Center", null);
+
+                if (pad == null)
+                {
+                    return;
+                }
+            }
+
+            pad.Sticky = true;
+            pad.AutoHide = false;
+            pad.BringToFront();
+        }
+
+        public static bool IsPadOpen()
+        {
+            return GetActivePad() != null;
+        }
+
+        public static Pad GetActivePad()
+        {
+            var pads = IdeApp.Workbench.Pads;
+
+            foreach (var pad in pads)
+            {
+                if (string.Equals(pad.Id, PadId, StringComparison.OrdinalIgnoreCase))
+                {
+                    return pad;
+                }
+            }
+
+            return null;
         }
     }
 }

src/VS4Mac.SkiaSharpFiddle/Views/SkiaSharpFiddleView.cs

@@ -11,9 +11,6 @@ using SkiaSharp.Views.Gtk;
 using VS4Mac.SkiaSharpFiddle.Controllers;
 using VS4Mac.SkiaSharpFiddle.Controllers.Base;
 using VS4Mac.SkiaSharpFiddle.Views.Base;
-using MonoDevelop.Components;
-using MonoDevelop.Ide;
-using MonoDevelop.Ide.Gui;
 
 namespace VS4Mac.SkiaSharpFiddle.Views
 {