Added window (de-)activate events

GlitchyEngine/src/Application.bf

@@ -1,96 +1,99 @@
-using System;
-using GlitchyEngine.Events;
-using GlitchyEngine.ImGui;
-using GlitchyEngine.Renderer;
-
-namespace GlitchyEngine
-{
-	public class Application
-	{
-		static Application s_Instance = null;
-
-		private Window _window ~ delete _;
-		private RendererAPI _rendererApi ~ delete _;
-		private bool _running = true;
-
-		private LayerStack _layerStack = new LayerStack() ~ delete _;
-
-		private ImGuiLayer _imGuiLayer;
-
-		private GameTime _gameTime = new GameTime(true) ~ delete _;
-
-		public bool IsRunning => _running;
-		public Window Window => _window;
-
-		[Inline]
-		public static Application Get() => s_Instance;
-
-		public this()
-		{
-			Log.EngineLogger.Assert(s_Instance == null, "Tried to create a second application.");
-			s_Instance = this;
-
-			_window = new Window(.Default);
-			_window.EventCallback = new => OnEvent;
-
-			_rendererApi = new RendererAPI();
-			_rendererApi.Context = _window.Context;
-
-			SamplerStateManager.Init(_window.Context);
-
-			RenderCommand.RendererAPI = _rendererApi;
-			
-			Renderer.Init(_window.Context);
-
-			_imGuiLayer = new ImGuiLayer();
-			PushOverlay(_imGuiLayer);
-		}
-
-		public ~this()
-		{
-			SamplerStateManager.Uninit();
-		}
-
-		public void OnEvent(Event e)
-		{
-			EventDispatcher dispatcher = scope .(e);
-			dispatcher.Dispatch<WindowCloseEvent>(scope => OnWindowClose);
-
-			for(Layer layer in _layerStack)
-			{
-				layer.OnEvent(e);
-				if(e.Handled)
-					break;
-			}
-		}
-
-		public void Run()
-		{
-			while(_running)
-			{
-				_gameTime.NewFrame();
-
-				Input.NewFrame();
-
-				for(Layer layer in _layerStack)
-					layer.Update(_gameTime);
-				
-				_window.Update();
-
-				_imGuiLayer.ImGuiRender();
-
-				_window.Context.SwapChain.Present();
-			}
-		}
-
-		public void PushLayer(Layer ownLayer) => _layerStack.PushLayer(ownLayer);
-
-		public void PushOverlay(Layer ownOverlay) => _layerStack.PushOverlay(ownOverlay);
-
-		public bool OnWindowClose(WindowCloseEvent e)
-		{
-			_running = false;
-			return true;
-		}
-	}
-}
+using System;
+using GlitchyEngine.Events;
+using GlitchyEngine.ImGui;
+using GlitchyEngine.Renderer;
+
+namespace GlitchyEngine
+{
+	public class Application
+	{
+		static Application s_Instance = null;
+
+		private Window _window ~ delete _;
+		private RendererAPI _rendererApi ~ delete _;
+		private bool _running = true;
+
+		private LayerStack _layerStack = new LayerStack() ~ delete _;
+
+		private ImGuiLayer _imGuiLayer;
+
+		private GameTime _gameTime = new GameTime(true) ~ delete _;
+
+		public bool IsRunning => _running;
+		public Window Window => _window;
+
+		[Inline]
+		public static Application Get() => s_Instance;
+
+		public this()
+		{
+			Log.EngineLogger.Assert(s_Instance == null, "Tried to create a second application.");
+			s_Instance = this;
+
+			_window = new Window(.Default);
+			_window.EventCallback = new => OnEvent;
+
+			_rendererApi = new RendererAPI();
+			_rendererApi.Context = _window.Context;
+
+			SamplerStateManager.Init(_window.Context);
+
+			RenderCommand.RendererAPI = _rendererApi;
+			
+			Renderer.Init(_window.Context);
+
+			_imGuiLayer = new ImGuiLayer();
+			PushOverlay(_imGuiLayer);
+		}
+
+		public ~this()
+		{
+			SamplerStateManager.Uninit();
+		}
+
+		public void OnEvent(Event e)
+		{
+			if(!_running)
+				return;
+
+			EventDispatcher dispatcher = scope .(e);
+			dispatcher.Dispatch<WindowCloseEvent>(scope => OnWindowClose);
+
+			for(Layer layer in _layerStack)
+			{
+				layer.OnEvent(e);
+				if(e.Handled)
+					break;
+			}
+		}
+
+		public void Run()
+		{
+			while(_running)
+			{
+				_gameTime.NewFrame();
+
+				Input.NewFrame();
+
+				for(Layer layer in _layerStack)
+					layer.Update(_gameTime);
+				
+				_window.Update();
+
+				_imGuiLayer.ImGuiRender();
+
+				_window.Context.SwapChain.Present();
+			}
+		}
+
+		public void PushLayer(Layer ownLayer) => _layerStack.PushLayer(ownLayer);
+
+		public void PushOverlay(Layer ownOverlay) => _layerStack.PushOverlay(ownOverlay);
+
+		public bool OnWindowClose(WindowCloseEvent e)
+		{
+			_running = false;
+			return true;
+		}
+	}
+}

GlitchyEngine/src/Events/ApplicationEvent.bf

@@ -89,4 +89,44 @@ namespace GlitchyEngine.Events
 			strBuffer.AppendF("WindowMovedEvent: {}, {} (is moving: {})", _x, _y, _isMoving);
 		}
 	}
+
+	public class WindowActivateEvent : Event, IEvent
+	{
+		public override EventType EventType => .WindowMoved;
+
+		public override StringView Name => "WindowActivated";
+
+		public override EventCategory Category => .Application;
+
+		public static EventType StaticType => .WindowActivated;
+
+		public this()
+		{
+		}
+
+		public override void ToString(String strBuffer)
+		{
+			strBuffer.AppendF("WindowActivatedEvent");
+		}
+	}
+
+	public class WindowDeactivateEvent : Event, IEvent
+	{
+		public override EventType EventType => .WindowMoved;
+
+		public override StringView Name => "WindowDeactivated";
+
+		public override EventCategory Category => .Application;
+
+		public static EventType StaticType => .WindowDeactivated;
+
+		public this()
+		{
+		}
+
+		public override void ToString(String strBuffer)
+		{
+			strBuffer.AppendF("WindowDeactivatedEvent");
+		}
+	}
 }

GlitchyEngine/src/Events/Event.bf

@@ -4,7 +4,7 @@ namespace GlitchyEngine.Events
 	public enum EventType
 	{
 		None = 0,
-		WindowClose, WindowResize, WindowFocus, WindowLostFocus, WindowMoved,
+		WindowClose, WindowResize, WindowFocus, WindowLostFocus, WindowMoved, WindowActivated, WindowDeactivated,
 		AppTick, AppUpdate, AppRender,
 		KeyPressed, KeyReleased, KeyTyped,
 		MouseButtonPressed, MouseButtonReleased, MouseMoved, MouseScrolled

GlitchyEngine/src/Platform/Windows/WindowsInput.bf

@@ -20,8 +20,10 @@ namespace GlitchyEngine
 			public Point CursorPositionDifference;
 		}
 
-		static WindowsInputState* CurrentState = new WindowsInputState() ~ delete _;
-		static WindowsInputState* LastState = new WindowsInputState() ~ delete _;
+		static WindowsInputState[2] IputStates;
+
+		static WindowsInputState* CurrentState = &IputStates[0];
+		static WindowsInputState* LastState = &IputStates[1];
 
 		//
 		// Current Keyboard state
@@ -162,11 +164,8 @@ namespace GlitchyEngine
 
 		public override static void NewFrame()
 		{
-			// Switch last and current states
-			var buffer = LastState;
-			LastState = CurrentState;
-			CurrentState = buffer;
-
+			Swap!(CurrentState, LastState);
+			
 			// Get current keyboard state
 			if(DirectX.Windows.Winuser.GetKeyboardState((uint8*)&CurrentState.KeyStates) == 0)
 			{

GlitchyEngine/src/Platform/Windows/WindowsWindow.bf

@@ -31,6 +31,8 @@ namespace GlitchyEngine
 
 		private bool _isVSync = true;
 
+		private bool _isActive;
+
 		private GraphicsContext _graphicsContext ~ _?.ReleaseRef();
 
 		public override GraphicsContext Context => _graphicsContext;
@@ -149,6 +151,8 @@ namespace GlitchyEngine
 			set => _isVSync = value;
 		}
 
+		public override bool IsActive => _isActive;
+
 		public override void* NativeWindow => (void*)(int)_windowHandle;
 
 		public override this(WindowDescription desc)
@@ -176,6 +180,9 @@ namespace GlitchyEngine
 			UnregisterClass(WindowClassName.ToScopedNativeWChar!(), _instanceHandle);
 		}
 
+		[LinkName(.C)]
+		static extern HWnd GetActiveWindow();
+
 		private void Init(WindowDescription desc)
 		{
 			Log.EngineLogger.Trace($"Creating window \"{desc.Title}\" ({desc.Width}, {desc.Height})...");
@@ -215,6 +222,9 @@ namespace GlitchyEngine
 			LoadWindowRectangle();
 
 			Log.EngineLogger.Trace($"Created window \"{Title}\" ({Width}, {Height})");
+
+			// Determine whether or not the window is currently active
+			_isActive = GetActiveWindow() == _windowHandle;
 		}
 
 		private bool _isResizingOrMoving;
@@ -304,7 +314,26 @@ namespace GlitchyEngine
 					var moveEvent = scope WindowMoveEvent(window._clientRect.X, window._clientRect.Y, false);
 					window._eventCallback(moveEvent);
 				}
+				 
+			case 0x0006: //WM_ACTIVATE
+				{
+					SplitHighAndLowOrder!((int64)wParam, let lowWParam, let highWParam);
 
+					bool isActivate = lowWParam > 0;
+
+					//HWnd windowHandle = (.)lParam;
+
+					if(window._isActive != isActivate)
+					{
+						window._isActive = isActivate;
+
+						if(window._isActive)
+							window._eventCallback(scope WindowActivateEvent());
+						else
+							window._eventCallback(scope WindowDeactivateEvent());
+
+					}
+				}
 				////
 				//// Keyboard input
 				////

GlitchyEngine/src/Window.bf

@@ -98,6 +98,11 @@ namespace GlitchyEngine
 		 */
 		public extern void* NativeWindow {get;}
 
+		/**
+		 * Gets whether or not the window is active.
+		 */
+		public extern bool IsActive {get;}
+
 		public EventCallback EventCallback
 		{
 			get => _eventCallback;

Sandbox/src/SandboxApp.bf

@@ -193,32 +193,35 @@ namespace Sandbox
 
 		public override void Update(GameTime gameTime)
 		{
-			Vector2 movement = .();
-
-			if(Input.IsKeyPressed(Key.W))
+			if(Application.Get().Window.IsActive)
 			{
-				movement.Y += 1;
-			}
-			if(Input.IsKeyPressed(Key.S))
-			{
-				movement.Y -= 1;
-			}
-			
-			if(Input.IsKeyPressed(Key.A))
-			{
-				movement.X -= 1;
-			}
-			if(Input.IsKeyPressed(Key.D))
-			{
-				movement.X += 1;
-			}
+				Vector2 movement = .();
 
-			if(movement != .Zero)
-				movement.Normalize();
+				if(Input.IsKeyPressed(Key.W))
+				{
+					movement.Y += 1;
+				}
+				if(Input.IsKeyPressed(Key.S))
+				{
+					movement.Y -= 1;
+				}
 
-			movement *= (float)(gameTime.FrameTime.TotalSeconds);
+				if(Input.IsKeyPressed(Key.A))
+				{
+					movement.X -= 1;
+				}
+				if(Input.IsKeyPressed(Key.D))
+				{
+					movement.X += 1;
+				}
 
-			_camera.Position += .(movement, 0);
+				if(movement != .Zero)
+					movement.Normalize();
+
+				movement *= (float)(gameTime.FrameTime.TotalSeconds);
+
+				_camera.Position += .(movement, 0);
+			}
 
 			_camera.Width = _context.SwapChain.BackbufferViewport.Width / 256;
 			_camera.Height = _context.SwapChain.BackbufferViewport.Height / 256;