Also store Dear ImGui INI file in the app config dir

Author: kblaschke

src/gui/ProjectMGUI.cpp

@@ -23,7 +23,13 @@ void ProjectMGUI::initialize(Poco::Util::Application& app)
     IMGUI_CHECKVERSION();
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO();
-    (void) io;
+
+    Poco::Path userConfigurationDir = Poco::Path::configHome();
+    userConfigurationDir.makeDirectory().append("projectM/");
+    userConfigurationDir.setFileName(app.config().getString("application.baseName") + ".UI.ini");
+    _uiIniFileName = userConfigurationDir.toString();
+
+    io.IniFilename = _uiIniFileName.c_str();
 
     ImGui::StyleColorsDark();
 

src/gui/ProjectMGUI.h

@@ -134,6 +134,8 @@ class ProjectMGUI : public Poco::Util::Subsystem
 
     Poco::NObserver<ProjectMGUI, DisplayToastNotification> _displayToastNotificationObserver{*this, &ProjectMGUI::DisplayToastNotificationHandler};
 
+    std::string _uiIniFileName; //!< Path and filename of the UI configuration (positions etc.)
+
     SDL_Window* _renderingWindow{nullptr}; //!< Pointer to the SDL window used for rendering.
     SDL_GLContext _glContext{nullptr}; //!< Pointer to the OpenGL context associated with the window.
     ImFont* _uiFont{nullptr}; //!< Main UI font (monospaced).