Improved Editor

- Added window docking
- Added MenuBar
- Added scene viewport
- Added closing and reopening for editor windows

GlitchyEditor/src/EditWindows/ComponentEditWindow.bf

@@ -7,16 +7,18 @@ namespace GlitchyEditor.EditWindows
 {
 	class ComponentEditWindow
 	{
+		public const String s_WindowTitle = "Components";
+
 		private Editor _editor;
 		
-		private bool _show = true;
+		private bool _open = true;
 
 		public Editor Editor => _editor;
 		
-		public bool Show
+		public bool Open
 		{
-			get => _show;
+			get => _open;
-			set => _show = value;
+			set => _open = value;
 		}
 
 		public this(Editor editor)
@@ -26,10 +28,10 @@ namespace GlitchyEditor.EditWindows
 
 		public void Show()
 		{
-			if(!_show)
+			if(!_open)
 				return;
 
-			if(!ImGui.Begin("Components"))
+			if(!ImGui.Begin(s_WindowTitle, &_open, .None))
 			{
 				ImGui.End();
 				return;

GlitchyEditor/src/EditWindows/EntityHierarchyWindow.bf

@@ -12,19 +12,21 @@ namespace GlitchyEditor.EditWindows
 	/// A window for viewing and editing the scene hierarchy
 	class EntityHierarchyWindow
 	{
+		public const String s_WindowTitle = "Entity Hierarchy";
+
 		private Editor _editor;
 		
 		/// Buffer for the entity search string.
 		private char8[64] _entitySearchChars;
 
-		private bool _show = true;
+		private bool _open = true;
 
 		public Editor Editor => _editor;
 		
-		public bool Show
+		public bool Open
 		{
-			get => _show;
+			get => _open;
-			set => _show = value;
+			set => _open = value;
 		}
 
 		public this(Editor editor)
@@ -34,10 +36,10 @@ namespace GlitchyEditor.EditWindows
 		
 		public void Show()
 		{
-			if(!_show)
+			if(!_open)
 				return;
 
-			if(!ImGui.Begin("Entity Hierarchy", null, .MenuBar))
+			if(!ImGui.Begin(s_WindowTitle, &_open, .MenuBar))
 			{
 				ImGui.End();
 				return;

GlitchyEditor/src/EditWindows/SceneViewportWindow.bf

@@ -0,0 +1,99 @@
+using System;
+using ImGui;
+using GlitchyEngine.Renderer;
+using GlitchyEngine.Math;
+using GlitchyEngine;
+
+namespace GlitchyEditor.EditWindows
+{
+	class SceneViewportWindow
+	{
+		public const String s_WindowTitle = "Scene";
+
+		private bool _open = true;
+
+		private Texture2D _texture ~ _?.ReleaseRef();
+
+		private bool _hasFocus;
+
+		public Event<EventHandler<Vector2>> ViewportSizeChangedEvent ~ _.Dispose();
+
+		public bool Open
+		{
+			get => _open;
+			set => _open = value;
+		}
+
+		public bool HasFocus
+		{
+			get => _hasFocus;
+		}
+
+		public Texture2D Texture
+		{
+			get => _texture;
+			set
+			{
+				if(_texture == value)
+					return;
+
+				_texture?.ReleaseRef();
+				_texture = value;
+				_texture?.AddRef();
+			}
+		}
+
+		public this()
+		{
+		}
+
+		private ImGui.Vec2 oldViewportSize;
+
+		Texture2D _lastTexture;
+
+		public void Show()
+		{
+			// Hold a reference to the texture until the next frame.
+			// This is a workaround for the issue that changing the window size will release the texture
+			_lastTexture?.ReleaseRef();
+			_lastTexture = _texture;
+			_lastTexture.AddRef();
+
+			if(!_open)
+				return;
+			
+			ImGui.PushStyleVar(.WindowPadding, ImGui.Vec2(1, 1));
+			defer ImGui.PopStyleVar();
+
+			if(!ImGui.Begin(s_WindowTitle, &_open, .NoScrollbar))
+			{
+				ImGui.End();
+				return;
+			}
+
+			if(ImGui.IsWindowHovered() && Input.IsMouseButtonPressing(.RightButton))
+			{
+				var currentWindow = ImGui.GetCurrentWindow();
+				ImGui.FocusWindow(currentWindow);
+			}
+
+			_hasFocus = ImGui.IsWindowFocused();
+
+			var viewportSize = ImGui.GetContentRegionAvail();
+
+			if(_lastTexture != null)
+			{
+				ImGui.Image(_lastTexture, viewportSize);
+			}
+			
+			ImGui.End();
+			
+			if(oldViewportSize != viewportSize)
+			{
+				ViewportSizeChangedEvent.Invoke(this, *(Vector2*)&viewportSize);
+
+				oldViewportSize = viewportSize;
+			}
+		}
+	}
+}

GlitchyEditor/src/Editor.bf

@@ -13,6 +13,7 @@ namespace GlitchyEditor
 		
 		private EntityHierarchyWindow _entityHierarchyWindow = new .(this) ~ delete _;
 		private ComponentEditWindow _componentEditWindow = new .(this) ~ delete _;
+		private SceneViewportWindow _sceneViewportWindow = new .() ~ delete _;
 
 		private List<Entity> _selectedEntities = new .() ~ delete _;
 
@@ -20,6 +21,10 @@ namespace GlitchyEditor
 
 		public List<Entity> SelectedEntities => _selectedEntities;
 
+		public EntityHierarchyWindow EntityHierarchyWindow => _entityHierarchyWindow;
+		public ComponentEditWindow ComponentEditWindow => _componentEditWindow;
+		public SceneViewportWindow SceneViewportWindow => _sceneViewportWindow;
+
 		/// Creates a new editor for the given world
 		public this(EcsWorld world)
 		{
@@ -30,6 +35,7 @@ namespace GlitchyEditor
 		{
 			_entityHierarchyWindow.Show();
 			_componentEditWindow.Show();
+			_sceneViewportWindow.Show();
 		}
 
 		/// Creates a new entity with a transform component.

GlitchyEditor/src/EditorLayer.bf

@@ -2,9 +2,12 @@ using GlitchyEditor.EditWindows;
 using GlitchyEngine;
 using GlitchyEngine.Events;
 using GlitchyEngine.ImGui;
+using GlitchyEngine.Math;
 using GlitchyEngine.Renderer;
 using GlitchyEngine.World;
 using ImGui;
+using System;
+using GlitchyEngine.Renderer.Text;
 
 namespace GlitchyEditor
 {
@@ -14,28 +17,34 @@ namespace GlitchyEditor
 		RasterizerState _rasterizerStateClockWise ~ _?.ReleaseRef();
 
 		GraphicsContext _context ~ _?.ReleaseRef();
-		DepthStencilTarget _depthTarget ~ _?.ReleaseRef();
+		DepthStencilTarget _swapchainDepthBuffer ~ _?.ReleaseRef();
 		
 		BlendState _alphaBlendState ~ _?.ReleaseRef();
 		BlendState _opaqueBlendState ~ _?.ReleaseRef();
 		
 		EcsWorld _world = new EcsWorld() ~ delete _;
 
-		Editor _editor = new Editor(_world) ~ delete _;
+		Editor _editor ~ delete _;
+
+		PerspectiveCameraController _cameraController ~ delete _;
+		
+		RenderTarget2D _renderTarget2D ~ _?.ReleaseRef();
+		DepthStencilTarget _depthTarget ~ _?.ReleaseRef();
 
 		public this() : base("Example")
 		{
 			Application.Get().Window.IsVSync = false;
-			
+
 			InitGraphics();
 			InitEcs();
+			InitEditor();
 		}
 
 		private void InitGraphics()
 		{
 			_context = Application.Get().Window.Context..AddRef();
 			
-			_depthTarget = new DepthStencilTarget(_context, _context.SwapChain.Width, _context.SwapChain.Height);
+			_swapchainDepthBuffer = new DepthStencilTarget(_context, _context.SwapChain.Width, _context.SwapChain.Height);
 			
 			RasterizerStateDescription rsDesc = .(.Solid, .Back, true);
 			_rasterizerState = new RasterizerState(_context, rsDesc);
@@ -47,6 +56,17 @@ namespace GlitchyEditor
 			blendDesc.RenderTarget[0] = .(true, .SourceAlpha, .InvertedSourceAlpha, .Add, .SourceAlpha, .InvertedSourceAlpha, .Add, .All);
 			_alphaBlendState = new BlendState(_context, blendDesc);
 			_opaqueBlendState = new BlendState(_context, .Default);
+
+			_renderTarget2D = new RenderTarget2D(_context, 100, 100, .R8G8B8A8_UNorm);
+			_depthTarget = new DepthStencilTarget(_context, 100, 100, .D32_Float);
+
+			SamplerStateDescription desc = .();
+
+			SamplerState sampler = new SamplerState(_context, desc);
+
+			_renderTarget2D.SamplerState = sampler;
+
+			sampler.ReleaseRef();
 		}
 
 		private void InitEcs()
@@ -61,30 +81,143 @@ namespace GlitchyEditor
 			_world.Register<AnimationComponent>();
 		}
 
+		private void InitEditor()
+		{
+			_editor = new Editor(_world);
+			_editor.SceneViewportWindow.ViewportSizeChangedEvent.Add(new (s, e) => ViewportSizeChanged(s, e));
+
+			_cameraController = new .(Application.Get().Window.Context.SwapChain.BackbufferViewport.Width /
+									Application.Get().Window.Context.SwapChain.BackbufferViewport.Height);
+			_cameraController.CameraPosition = .(0, 0, -5);
+			_cameraController.TranslationSpeed = 10;
+			
+
+			_editor.[Friend]CreateEntityWithTransform();
+		}
+		
 		public override void Update(GameTime gameTime)
 		{
-			RenderCommand.Clear(null, .(0.2f, 0.2f, 0.2f));
+			if(_editor.SceneViewportWindow.HasFocus && Input.IsMouseButtonPressed(.RightButton))
+				_cameraController.Update(gameTime);
+
+			TransformSystem.Update(_world);
+
+			RenderCommand.Clear(_renderTarget2D, .(0.2f, 0.2f, 0.2f));
 			_depthTarget.Clear(1.0f, 0, .Depth);
 
-			_context.SetRenderTarget(null);
+			_context.SetRenderTarget(_renderTarget2D);
 			_depthTarget.Bind();
 			_context.BindRenderTargets();
+
+			_context.SetViewport(Viewport(0, 0, _renderTarget2D.Width, _renderTarget2D.Height));
+
+			_opaqueBlendState.Bind();
+
+			Renderer.BeginScene(_cameraController.Camera);
+
+			DebugRenderer.Render(_world);
 			
+			Renderer.EndScene();
+
+			RenderCommand.Clear(null, .(0.2f, 0.2f, 0.2f));
+			_swapchainDepthBuffer.Clear(1.0f, 0, .Depth);
+
+			_context.SetRenderTarget(null);
+			_swapchainDepthBuffer.Bind();
+			_context.BindRenderTargets();
+
 			_context.SetViewport(_context.SwapChain.BackbufferViewport);
 		}
 
 		public override void OnEvent(Event event)
 		{
+			_cameraController.OnEvent(event);
+
 			EventDispatcher dispatcher = EventDispatcher(event);
 
 			dispatcher.Dispatch<ImGuiRenderEvent>(scope (e) => OnImGuiRender(e));
+			dispatcher.Dispatch<WindowResizeEvent>(scope (e) => OnWindowResize(e));
 		}
 
+		ImGui.ID _mainDockspaceId;
+
 		private bool OnImGuiRender(ImGuiRenderEvent event)
 		{
+			ImGui.Viewport* viewport = ImGui.GetMainViewport();
+			ImGui.DockSpaceOverViewport(viewport);
+
+			DrawMainMenuBar();
+
+			_editor.SceneViewportWindow.Texture = _renderTarget2D;
+
 			_editor.Update();
 
 			return false;
 		}
+
+		private void DrawMainMenuBar()
+		{
+			ImGui.BeginMainMenuBar();
+
+			if(ImGui.BeginMenu("File", false))
+			{
+				ImGui.EndMenu();
+			}
+			
+			if(ImGui.BeginMenu("View", true))
+			{
+				if(ImGui.MenuItem(EntityHierarchyWindow.s_WindowTitle))
+				{
+					_editor.EntityHierarchyWindow.Open = true;
+				}
+
+				if(ImGui.MenuItem(ComponentEditWindow.s_WindowTitle))
+				{
+					_editor.ComponentEditWindow.Open = true;
+				}
+
+				if(ImGui.MenuItem(SceneViewportWindow.s_WindowTitle))
+				{
+					_editor.SceneViewportWindow.Open = true;
+				}
+
+				ImGui.EndMenu();
+			}
+
+
+			ImGui.EndMainMenuBar();
+		}
+
+		private bool OnWindowResize(WindowResizeEvent e)
+		{
+			_swapchainDepthBuffer.ReleaseRef();
+			_swapchainDepthBuffer = new DepthStencilTarget(_context, _context.SwapChain.Width, _context.SwapChain.Height);
+
+			return false;
+		}
+
+		private void ViewportSizeChanged(Object sender, Vector2 viewportSize)
+		{
+			uint32 sizeX = (uint32)viewportSize.X;
+			uint32 sizeY = (uint32)viewportSize.Y;
+
+			if(sizeX == 0 || sizeY == 0)
+				return;
+
+			var sampler = _renderTarget2D.SamplerState;
+
+			_renderTarget2D.ReleaseRef();
+			_depthTarget.ReleaseRef();
+
+			_renderTarget2D = new RenderTarget2D(_context, sizeX, sizeY, .R8G8B8A8_UNorm);
+			_editor.SceneViewportWindow.Texture = _renderTarget2D;
+
+			_depthTarget = new DepthStencilTarget(_context, sizeX, sizeY, .D32_Float);
+
+			_cameraController.AspectRatio = (float)sizeX / (float)sizeY;
+
+			
+			_renderTarget2D.SamplerState = sampler;
+		}
 	}
 }