QDateEdit return to previous state on button click in Qt C++ -

i have qdateedit in form in qt , want on button click qdateedit returns previous state. how can done?

at moment state of qdateedit (which specialized qdatetimeedit) can retrieved calling date() method.

then, said, need put value qdate variable of class , create slot connect button click , calls setdate set qdateedit date.

below code snippet shows 1 way this.

#ifndef mydialog_h #define mydialog_h  #include <qdialog> #include <qhboxlayout> #include <qdateedit> #include <qpushbutton>  class dialog: public qdialog {   q_object      public:   dialog(qwidget *parent = 0) : qdialog(parent),     layout(this),     edit(),     button("reset",this)       {         layout.addwidget(&edit);         layout.addwidget(&button);         date = edit.date();         connect(&button, signal( clicked() ), this, slot( resettime() ) );       }    public slots:    void resettime()   {     edit.setdate(date);   }   private:    qhboxlayout layout;   qdateedit edit;   qpushbutton button;   qdate date;  };  #endif 

main.cc completeness

#include <qapplication>  #include "dialog.h"  int main(int argc, char** argv) {   qapplication app(argc, argv);   dialog dialog;    dialog.show();    return app.exec();  } 

let me know if helps.