Route editor actions by active target

editor/src/UI/ImGuiBackendBridge.h

@@ -0,0 +1,65 @@
+#pragma once
+
+#include <d3d12.h>
+#include <dxgi1_6.h>
+#include <imgui.h>
+#include <imgui_impl_dx12.h>
+#include <imgui_impl_win32.h>
+#include <windows.h>
+
+extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
+
+namespace XCEngine {
+namespace Editor {
+namespace UI {
+
+class ImGuiBackendBridge {
+public:
+    void Initialize(
+        HWND hwnd,
+        ID3D12Device* device,
+        ID3D12DescriptorHeap* srvHeap,
+        int frameCount = 3,
+        DXGI_FORMAT backBufferFormat = DXGI_FORMAT_R8G8B8A8_UNORM) {
+        ImGui_ImplWin32_Init(hwnd);
+        ImGui_ImplDX12_Init(
+            device,
+            frameCount,
+            backBufferFormat,
+            srvHeap,
+            srvHeap->GetCPUDescriptorHandleForHeapStart(),
+            srvHeap->GetGPUDescriptorHandleForHeapStart());
+        m_initialized = true;
+    }
+
+    void Shutdown() {
+        if (!m_initialized) {
+            return;
+        }
+
+        ImGui_ImplDX12_Shutdown();
+        ImGui_ImplWin32_Shutdown();
+        m_initialized = false;
+    }
+
+    void BeginFrame() const {
+        ImGui_ImplDX12_NewFrame();
+        ImGui_ImplWin32_NewFrame();
+        ImGui::NewFrame();
+    }
+
+    void RenderDrawData(ID3D12GraphicsCommandList* commandList) const {
+        ImGui_ImplDX12_RenderDrawData(ImGui::GetDrawData(), commandList);
+    }
+
+    static bool HandleWindowMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
+        return ImGui_ImplWin32_WndProcHandler(hwnd, msg, wParam, lParam) != 0;
+    }
+
+private:
+    bool m_initialized = false;
+};
+
+} // namespace UI
+} // namespace Editor
+} // namespace XCEngine

editor/src/UI/ImGuiSession.h

@@ -0,0 +1,77 @@
+#pragma once
+
+#include "BaseTheme.h"
+
+#include <imgui.h>
+
+#include <filesystem>
+#include <string>
+
+namespace XCEngine {
+namespace Editor {
+namespace UI {
+
+class ImGuiSession {
+public:
+    void Initialize(const std::string& projectPath) {
+        IMGUI_CHECKVERSION();
+        ImGui::CreateContext();
+
+        ImGuiIO& io = ImGui::GetIO();
+        io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
+
+        ConfigureIniFile(projectPath, io);
+        ConfigureFonts(io);
+        ApplyBaseTheme(ImGui::GetStyle());
+    }
+
+    void Shutdown() {
+        SaveSettings();
+        if (ImGui::GetCurrentContext() != nullptr) {
+            ImGui::DestroyContext();
+        }
+
+        m_iniPath.clear();
+    }
+
+    void SaveSettings() const {
+        if (m_iniPath.empty() || ImGui::GetCurrentContext() == nullptr) {
+            return;
+        }
+
+        ImGui::SaveIniSettingsToDisk(m_iniPath.c_str());
+    }
+
+    const std::string& GetIniPath() const {
+        return m_iniPath;
+    }
+
+private:
+    void ConfigureIniFile(const std::string& projectPath, ImGuiIO& io) {
+        const std::filesystem::path configDir = std::filesystem::path(projectPath) / ".xceditor";
+        std::error_code ec;
+        std::filesystem::create_directories(configDir, ec);
+
+        m_iniPath = (configDir / "imgui_layout.ini").string();
+        io.IniFilename = m_iniPath.c_str();
+    }
+
+    void ConfigureFonts(ImGuiIO& io) const {
+        if (ImFont* uiFont = io.Fonts->AddFontFromFileTTF("C:/Windows/Fonts/msyh.ttc", 15.0f)) {
+            io.FontDefault = uiFont;
+        } else {
+            io.FontDefault = io.Fonts->AddFontDefault();
+        }
+
+        unsigned char* pixels = nullptr;
+        int width = 0;
+        int height = 0;
+        io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+    }
+
+    std::string m_iniPath;
+};
+
+} // namespace UI
+} // namespace Editor
+} // namespace XCEngine