Fix segfault on app exit

roundabout,
created on Tuesday, 25 February 2025, 16:09:30 (1740499770), received on Tuesday, 25 February 2025, 16:09:33 (1740499773)
Author identity: vlad <vlad.muntoiu@gmail.com>

                                
                                
                                
                            
                                
                                    
                                        
                                            133  
                                                }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            134  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            135  
                                                DockStackSwitcher::DockStackSwitcher(DockStack *stack) : Gtk::ButtonBox(Gtk::ORIENTATION_HORIZONTAL), stack(stack) {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        136 -
                                                this->stack->signal_add().connect([this](Gtk::Widget *child) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        136 +
                                                add_handler = this->stack->signal_add().connect([this](Gtk::Widget *child) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            137  
                                                        this->update_buttons();
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            138  
                                                    });
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        139 -
                                                this->stack->signal_remove().connect([this](Gtk::Widget *child) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        139 +
                                                remove_handler = this->stack->signal_remove().connect([this](Gtk::Widget *child) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            140  
                                                        this->update_buttons();
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            141  
                                                    });
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            142  
                                                }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            143  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        144 +
                                            DockStackSwitcher::~DockStackSwitcher() {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        145 +
                                                add_handler.disconnect();
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        146 +
                                                remove_handler.disconnect();
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        147 +
                                            }
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        148 +
                                        
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            149  
                                                void DockStackSwitcher::update_buttons() {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        145 -
                                                for(auto &child: get_children()) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        150 +
                                                auto children = get_children();
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        151 +
                                                for(auto &child: children) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            152  
                                                        if(child) {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            153  
                                                            remove(*child);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            154  
                                                        }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                            
                                

                                
                                
                                
                            
                                
                                    
                                        
                                            65  
                                                class DockStackSwitcher : public Gtk::ButtonBox {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            66  
                                                private:
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            67  
                                                    DockStack *stack;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        68 +
                                                sigc::connection add_handler, remove_handler;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            69  
                                                public:
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            70  
                                                    void update_buttons();
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            71  
                                                    explicit DockStackSwitcher(DockStack *stack);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        72 +
                                                ~DockStackSwitcher() override;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            73  
                                                };
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            74  
                                            } // namespace gPanthera
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            75  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                            
                                

                                
                                
                                
                            
                                
                                    
                                        
                                            10  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            11  
                                                Gtk::Window window;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            12  
                                                window.set_default_size(600, 400);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        13 +
                                            window.signal_delete_event().connect([&app](GdkEventAny *event) {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        14 +
                                                app->quit();
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        15 +
                                                return false;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        16 +
                                            });
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            17  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            18  
                                                auto layout_manager = std::make_shared<gPanthera::LayoutManager>();
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            19  
                                                auto dock_stack_1 = Gtk::make_managed<gPanthera::DockStack>(layout_manager, "One");