wip: moving backend-related stuff out of the app logic

src/gui/ui_manager.hpp

@@ -0,0 +1,38 @@
+#ifndef CLRSYNC_UI_MANAGER_HPP
+#define CLRSYNC_UI_MANAGER_HPP
+#include <string>
+
+namespace clrsync::gui::backend
+{
+class backend_interface;
+}
+
+namespace clrsync::gui
+{
+
+struct ui_config
+{
+    std::string ini_path = "";
+    bool enable_docking = true;
+    bool enable_keyboard_nav = true;
+};
+
+class ui_manager
+{
+public:
+    explicit ui_manager(backend::backend_interface *backend);
+    ~ui_manager();
+
+    bool initialize(const ui_config& config = ui_config());
+    void shutdown();
+
+    void begin_frame();
+    void end_frame();
+
+private:
+    backend::backend_interface *m_backend;
+    void *m_imgui_context = nullptr;
+};
+}
+
+#endif