c++ - Sending QStringList between classes using signals and slots -

i have gui built using qt creator. @ point dialog window opened need send variable of type qstringlist. using signals , slots method. however, variable empty once sent. here code samples:

widget.h

class widget : public qwidget { q_object public: explicit widget(qwidget *parent = 0); ~widget(); signals: void mysignal(qstringlist); }; 

widget.cpp

widget::widget(qwidget *parent) :     qwidget(parent),     ui(new ui::widget) {  // blah blah }  widget::~widget() {     delete ui; }    void widget::on_pushbutton_4_clicked() {     qstringlist dlist;     int damount = ui->listwidget->count();     for(int i=0; < damount; i++){                                     dlist << ui->listwidget->item(i)->text();                                     qdebug() << dlist;                                     }     emit mysignal(dlist);      mysaver mdialog;     mdialog.setmodal(true);     mdialog.exec(); } 

mysaver.h (the dialog box)

class mysaver : public qdialog { q_object public: explicit mysaver(qwidget *parent = 0); ~mysaver();  public slots: void myreciever(qstringlist); } 

mysaver.cpp

void mysaver::myreciever(qstringlist alist) { qdebug << alist; } 

main.cpp

int main(int argc, char *argv[]) {     qapplication a(argc, argv); widget w;  widget *duff = new widget; mysaver *buff = new mysaver; qobject::connect(duff,signal(mysignal(qstringlist)),buff,slot(myreciever(qstringlist)));  w.show();  return a.exec(); } 

i'd appreciate on this. note: if i'm doing whole method wrong , should doing entirely different tell me!

you creating 2 mysaver instances , connecting first (invisible) one:

// in main.cpp mysaver *buff = new mysaver;  // in widget::on_pushbutton_4_clicked() mysaver mdialog; mdialog.setmodal(true); mdialog.exec(); 

mdialog not mysaver instance connected to.