protected override void OnRealized()
{
// Base implementation
base.OnRealized();
// Make the context current
MakeCurrent();
// Load OpenGL functions
GL.LoadOpenGL();
// Set the size of the viewport
ResizeViewport();
// Create the scene
_editorScene = new SceneEditorScene();
// Initialize events
_editorScene.GameElementAdded += _editorSceneGameElementAdded;
_editorScene.GameElementRemoved += _editorSceneGameElementRemoved;
// Create the game and add the scene
_editorGame = new SceneEditorGame(_editorScene);
// Enable depth testing
RendererManager.DepthTest();
// Enable blending
RendererManager.Blending();
// Enable face culling
RendererManager.FaceCulling();
// Enable Multi Samples
RendererManager.MultiSample();
// Enable depth mask
RendererManager.DepthMask();
// Start the editor game
_editorGame.Start();
// Initialize the renderer manager
RendererManager.Initialize();
// Focus on the editor
GrabFocus();
// Start updating the scene
Gdk.Threads.AddIdle(120, OnUpdateFrameClock);
// Refresh the game elements tree
((MainWindow)Toplevel).RefreshGameElementsTree();
}