Working on render logic

src/Artemis.UI/ViewModels/Controls/SurfaceEditor/SurfaceDeviceViewModel.cs

@@ -63,8 +63,8 @@ namespace Artemis.UI.ViewModels.Controls.SurfaceEditor
         {
             var roundedX = Math.Round((mousePosition.X + _dragOffsetX) / 10, 0, MidpointRounding.AwayFromZero) * 10;
             var roundedY = Math.Round((mousePosition.Y + _dragOffsetY) / 10, 0, MidpointRounding.AwayFromZero) * 10;
-            X = roundedX;
-            Y = roundedY;
+            X = Math.Max(0, roundedX);
+            Y = Math.Max(0, roundedY);
         }
 
         // ReSharper disable once UnusedMember.Global - Called from view

src/Artemis.UI/ViewModels/PanZoomViewModel.cs

@@ -42,8 +42,8 @@ namespace Artemis.UI.ViewModels
             Zoom = Math.Max(0.1, Math.Min(4, Zoom));
 
             // Update the PanX/Y to enable zooming relative to cursor
-            PanX = absoluteX - relative.X * Zoom;
-            PanY = absoluteY - relative.Y * Zoom;
+            PanX = Math.Min(0, absoluteX - relative.X * Zoom);
+            PanY = Math.Min(0, absoluteY - relative.Y * Zoom);
         }
 
         public void ProcessMouseMove(object sender, MouseEventArgs e)
@@ -60,9 +60,10 @@ namespace Artemis.UI.ViewModels
 
             var position = e.GetPosition((IInputElement) sender);
             var delta = _lastPanPosition - position;
-            PanX -= delta.Value.X;
-            PanY -= delta.Value.Y;
 
+            PanX = Math.Min(0, PanX - delta.Value.X);
+            PanY = Math.Min(0, PanY - delta.Value.Y);
+            
             _lastPanPosition = position;
         }
 

src/Artemis.UI/ViewModels/Screens/SurfaceEditorViewModel.cs

@@ -105,6 +105,8 @@ namespace Artemis.UI.ViewModels.Screens
                         Devices.Add(viewModel);
                 });
             });
+
+            _surfaceService.ActiveSurfaceConfiguration = SelectedSurfaceConfiguration;
         }
 
         #region Overrides of Screen