新建一个平台相关的打开和保存文件的工具

#pragma once
#include <string>
namespace CryDust {
    class FileDialogs
    {
        public:
            // These return empty strings if cancelled
            static std::string OpenFile(const char* filter);
            static std::string SaveFile(const char* filter);
    };
}

对应的WindowPlayformUtils（使用win窗口）

#include "cdpch.h"
#include "CryDust/Utils/PlatformUtils.h"
#include <commdlg.h>
#include <GLFW/glfw3.h>
#define GLFW_EXPOSE_NATIVE_WIN32
#include <GLFW/glfw3native.h>
#include "CryDust/Core/Application.h"
namespace CryDust {
    std::string FileDialogs::OpenFile(const char* filter)
    {
        OPENFILENAMEA ofn;
        CHAR szFile[260] = { 0 };
        ZeroMemory(&ofn, sizeof(OPENFILENAME));
        ofn.lStructSize = sizeof(OPENFILENAME);
        ofn.hwndOwner = glfwGetWin32Window((GLFWwindow*)Application::Get().GetWindow().GetNativeWindow());
        ofn.lpstrFile = szFile;
        ofn.nMaxFile = sizeof(szFile);
        ofn.lpstrFilter = filter;
        ofn.nFilterIndex = 1;
        ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR;
        if (GetOpenFileNameA(&ofn) == TRUE)
        {
            return ofn.lpstrFile;
        }
        return std::string();
    }
    std::string FileDialogs::SaveFile(const char* filter)
    {
        OPENFILENAMEA ofn;
        CHAR szFile[260] = { 0 };
        ZeroMemory(&ofn, sizeof(OPENFILENAME));
        ofn.lStructSize = sizeof(OPENFILENAME);
        ofn.hwndOwner = glfwGetWin32Window((GLFWwindow*)Application::Get().GetWindow().GetNativeWindow());
        ofn.lpstrFile = szFile;
        ofn.nMaxFile = sizeof(szFile);
        ofn.lpstrFilter = filter;
        ofn.nFilterIndex = 1;
        ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR;
        if (GetSaveFileNameA(&ofn) == TRUE)
        {
            return ofn.lpstrFile;
        }
        return std::string();
    }
}

EditorLayer

场景保存

    private:
        bool OnKeyPressed(KeyPressedEvent& e);
        void NewScene();
        void OpenScene();
        void SaveSceneAs();

场景函数

创建：构造、设置场景，设置上下文 打开：读路径，判断不为空，创建，设置上下文，反序列化 保存：读路径，判断不为空，序列化

    void EditorLayer::NewScene()
    {
        m_ActiveScene = CreateRef<Scene>();
        m_ActiveScene->OnViewportResize((uint32_t)m_ViewportSize.x, (uint32_t)m_ViewportSize.y);
        m_SceneHierarchyPanel.SetContext(m_ActiveScene);
    }
    void EditorLayer::OpenScene()
    {
        std::string filepath = FileDialogs::OpenFile("Hazel Scene (*.hazel)\0*.hazel\0");
        if (!filepath.empty())
        {
            m_ActiveScene = CreateRef<Scene>();
            m_ActiveScene->OnViewportResize((uint32_t)m_ViewportSize.x, (uint32_t)m_ViewportSize.y);
            m_SceneHierarchyPanel.SetContext(m_ActiveScene);
            SceneSerializer serializer(m_ActiveScene);
            serializer.Deserialize(filepath);
        }
    }
    void EditorLayer::SaveSceneAs()
    {
        std::string filepath = FileDialogs::SaveFile("Hazel Scene (*.hazel)\0*.hazel\0");
        if (!filepath.empty())
        {
            SceneSerializer serializer(m_ActiveScene);
            serializer.Serialize(filepath);
        }
    }

快捷键设置

ctrl+n创建，ctrl+o打开，ctrl+shift+s保存

    void EditorLayer::OnEvent(CryDust::Event& e)
    {
        m_CameraController.OnEvent(e);
        EventDispatcher dispatcher(e);
        dispatcher.Dispatch<KeyPressedEvent>(CD_BIND_EVENT_FN(EditorLayer::OnKeyPressed));
    }

bool EditorLayer::OnKeyPressed(KeyPressedEvent& e)
    {
        // Shortcuts
        if (e.GetRepeatCount() > 0)
            return false;
        bool control = Input::IsKeyPressed(Key::LeftControl) || Input::IsKeyPressed(Key::RightControl);
        bool shift = Input::IsKeyPressed(Key::LeftShift) || Input::IsKeyPressed(Key::RightShift);
        switch (e.GetKeyCode())
        {
        case Key::N:
        {
            if (control)
                NewScene();
            break;
        }
        case Key::O:
        {
            if (control)
                OpenScene();
            break;
        }
        case Key::S:
        {
            if (control && shift)
                SaveSceneAs();
            break;
        }
        }
    }

扩展后缀

        // 更强力的保存：扩展后缀
        ofn.lpstrDefExt = strchr(filter, '\0') + 1;