add: Scene::Update

core/e2dmodule.h

@@ -223,6 +223,10 @@ namespace e2d
 		// 结束
 		void Quit();
 
+		// 关闭窗口时触发
+		// 返回值：返回 false 将阻止窗口关闭
+		virtual bool OnExit() { return true; }
+
 		// 修改窗体大小
 		void SetSize(
 			int width,			/* 窗体宽度 */

core/e2dobject.h

@@ -152,9 +152,8 @@ namespace e2d
 		// 退出场景
 		virtual void OnExit() {}
 
-		// 关闭窗口
+		// 更新场景
-		// 说明：返回 false 将阻止窗口关闭
+		virtual void Update() {}
-		virtual bool OnCloseWindow() { return true; }
 
 		// 设置根节点
 		void SetRoot(

core/events/MouseEvent.cpp

@@ -32,6 +32,7 @@ float e2d::MouseEvent::GetX() const
 {
 	HDC hdc = ::GetDC(0);
 	int dpi_x = ::GetDeviceCaps(hdc, LOGPIXELSX);
+	::ReleaseDC(0, hdc);
 	return ((float)(short)LOWORD(l_param_)) * 96.f / dpi_x;
 }
 
@@ -39,6 +40,7 @@ float e2d::MouseEvent::GetY() const
 {
 	HDC hdc = ::GetDC(0);
 	int dpi_y = ::GetDeviceCaps(hdc, LOGPIXELSY);
+	::ReleaseDC(0, hdc);
 	return ((float)(short)HIWORD(l_param_)) * 96.f / dpi_y;
 }
 
@@ -47,6 +49,7 @@ e2d::Point e2d::MouseEvent::GetPosition() const
 	HDC hdc = ::GetDC(0);
 	int dpi_x = ::GetDeviceCaps(hdc, LOGPIXELSX);
 	int dpi_y = ::GetDeviceCaps(hdc, LOGPIXELSY);
+	::ReleaseDC(0, hdc);
 	return Point(
 		((float)(short)LOWORD(l_param_)) * 96.f / dpi_x,
 		((float)(short)HIWORD(l_param_)) * 96.f / dpi_y

core/modules/Game.cpp

@@ -209,6 +209,16 @@ void e2d::Game::UpdateScene()
 		curr_scene_ = next_scene_;
 		next_scene_ = nullptr;
 	}
+
+	if (curr_scene_)
+	{
+		curr_scene_->Update();
+	}
+
+	if (next_scene_)
+	{
+		next_scene_->Update();
+	}
 }
 
 void e2d::Game::DrawScene()
@@ -357,6 +367,7 @@ e2d::Rect e2d::Game::Locate(int width, int height)
 	HDC hdc = ::GetDC(0);
 	int dpi_x = GetDeviceCaps(hdc, LOGPIXELSX);
 	int dpi_y = GetDeviceCaps(hdc, LOGPIXELSY);
+	::ReleaseDC(0, hdc);
 	RECT rect = { 0, 0, LONG(ceil(width * dpi_x / 96.f)), LONG(ceil(height * dpi_y / 96.f)) };
 
 	// 计算合适的窗口大小
@@ -543,6 +554,7 @@ LRESULT e2d::Game::WndProc(HWND hwnd, UINT msg, WPARAM w_param, LPARAM l_param)
 				HDC hdc = ::GetDC(0);
 				int dpi_x = GetDeviceCaps(hdc, LOGPIXELSX);
 				int dpi_y = GetDeviceCaps(hdc, LOGPIXELSY);
+				::ReleaseDC(0, hdc);
 				game->width_ = static_cast<int>(width * 96.f / dpi_x);
 				game->height_ = static_cast<int>(height * 96.f / dpi_y);
 			}
@@ -588,8 +600,7 @@ LRESULT e2d::Game::WndProc(HWND hwnd, UINT msg, WPARAM w_param, LPARAM l_param)
 		// 窗口关闭消息
 		case WM_CLOSE:
 		{
-			auto currScene = game->GetCurrentScene();
+			if (game->OnExit())
-			if (!currScene || currScene->OnCloseWindow())
 			{
 				game->Quit();
 			}

core/modules/Input.cpp

@@ -150,6 +150,7 @@ e2d::Point e2d::Input::GetMousePos()
 	HDC hdc = ::GetDC(0);
 	int dpi_x = GetDeviceCaps(hdc, LOGPIXELSX);
 	int dpi_y = GetDeviceCaps(hdc, LOGPIXELSY);
+	::ReleaseDC(0, hdc);
 
 	POINT mousePos;
 	::GetCursorPos(&mousePos);