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#include <gtkmm/box.h>
#include <gtkmm/button.h>
#include <gtkmm/label.h>
#include <gtkmm/window.h>
#include <gtkmm/main.h>
class AppWindow
: public Gtk::Window
{
public:
AppWindow();
private:
void on_button_clicked();
Gtk::Label* m_label;
};
AppWindow::AppWindow()
: m_label (nullptr)
{
Gtk::Box* vbox = Gtk::make_managed<Gtk::Box>(Gtk::ORIENTATION_VERTICAL, 5);
add(*vbox);
Gtk::Button* button = Gtk::make_managed<Gtk::Button>("Delete Label");
vbox->pack_start(*button, Gtk::PACK_SHRINK);
//m_label = Gtk::make_managed<Gtk::Label>("test");
m_label = new Gtk::Label("test");
g_warning("m_label -> ref_count: %d\n", G_OBJECT(m_label->gobj())->ref_count);
vbox->pack_start(*m_label, Gtk::PACK_SHRINK);
g_warning("m_label -> ref_count: %d\n", G_OBJECT(m_label->gobj())->ref_count);
button->signal_clicked().connect( sigc::mem_fun(*this, &AppWindow::on_button_clicked));
show_all_children();
}
void AppWindow::on_button_clicked()
{
if(m_label)
{
g_warning("AppWindow::on_button_clicked(): label refcount=%d", G_OBJECT(m_label->gobj())->ref_count);
delete m_label;
m_label = nullptr;
}
}
int main(int argc, char *argv[])
{
Glib::RefPtr<Gtk::Application> app =
Gtk::Application::create(argc, argv);
AppWindow window;
return app->run(window);
}
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