示例：最小宿主

下面的流程对应 SDK 中的 examples/litheview_demo。真实应用通常把生命周期放在应用对象中，把 View 操作放在窗口对象中。

初始化与运行

struct ShellState {
  std::unique_ptr<ShellWindow> window;
};

void LTV_CALLBACK OnReady(void* user_data) {
  auto* state = static_cast<ShellState*>(user_data);
  state->window = std::make_unique<ShellWindow>();
  if (!state->window->Open()) {
    ltv_shutdown();
  }
}

int RunApp(int argc, const char* const* argv) {
  ltv_settings_t settings = {
      .struct_size = sizeof(ltv_settings_t),
      .version = LTV_STRUCT_VERSION,
      .width_dip = 1280,
      .height_dip = 720,
      .device_scale_factor = 1.0f,
      .remote_debugging_enabled = 0,
  };

  if (ltv_initialize(&settings) != LTV_OK) {
    return 1;
  }

  ShellState state;
  return ltv_run(argc, argv, &OnReady, &state);
}

创建并绑定 View

bool ShellWindow::CreateView() {
  view_ = ltv_view_create();
  if (!view_) {
    return false;
  }

  if (ltv_win_view_attach(
          view_, reinterpret_cast<uintptr_t>(render_hwnd_)) != LTV_OK) {
    ltv_view_destroy(view_);
    view_ = nullptr;
    return false;
  }

  return ltv_view_navigate(view_, "https://example.com/") == LTV_OK;
}

响应 WM_SIZE

void ShellWindow::ResizeView() {
  const int width_pixels = client_rect.right - client_rect.left;
  const int height_pixels = client_rect.bottom - client_rect.top;
  const float scale = static_cast<float>(GetDpiForWindow(hwnd_)) / 96.0f;

  ltv_win_view_resize(view_,
                      static_cast<int>(width_pixels / scale),
                      static_cast<int>(height_pixels / scale),
                      width_pixels,
                      height_pixels);
}

关闭

ShellWindow::~ShellWindow() {
  if (view_) {
    ltv_win_view_detach(view_);
    ltv_view_destroy(view_);
  }
}

// 最后一个窗口销毁后：
ltv_shutdown();

完整 Demo 还展示多标签页、popup、文件对话框、下载、IME 和共享 GPU 纹理输出。