Link error when showing a new form

[viniltc]

Hi all,

I'm getting a strange Link error on showing a form

#include "stagetwopatients.h"
#include "ui_stagetwopatients.h"
#include "stageonemain.h"
#include "stagetwonew.h"


StageTwoPatients::StageTwoPatients(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::StageTwoPatients)
{
    ui->setupUi(this);


    this->setStyleSheet("background-color: white;");
    this->setFixedSize(this->width(),this->height());
}

StageTwoPatients::~StageTwoPatients()
{
    delete ui;
}

void StageTwoPatients::on_pushButton_bmain_clicked()
{
   hide();
   StageOneMain *back =new StageOneMain(this);
   back ->show();
}

void StageTwoPatients::on_pushButton_new_clicked()
{

    hide();
    StageTwoNew *newone = new StageTwoNew(this);
    newone->show();

}

the Link error is as follows :

stagetwopatients.obj:-1: error: LNK2019: unresolved external symbol "public: __cdecl StageTwoNew::StageTwoNew(class QWidget *)" (??0StageTwoNew@@QEAA@PEAVQWidget@@@Z) referenced in function "private: void __cdecl StageTwoPatients::on_pushButton_new_clicked(void)" (?on_pushButton_new_clicked@StageTwoPatients@@AEAAXXZ)

Any idea, Where am I done wrong?

Thank you

[jsulm]

@viniltc said in Link error when showing a new form:

StageTwoNew::StageTwoNew

The error message tells you that StageTwoNew constructor is not defined.
You include

#include "stagetwonew.h"

did you also add stagetwonew.cpp to your project?

[Gerhard]

Is "stagetwonew.cpp" included in the Project ?
is qmake run after added class StageTwoNew ?

[Pl45m4]

@viniltc said in Link error when showing a new form:

StageTwoPatients::StageTwoPatients(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::StageTwoPatients)

This is technically not wrong, but I would avoid using multiple QMainWindows.
Especially when they are hiding / showing each other.
(I assume StageOneMain, StageTwoNew are QMainWindow- derived classes as well?!)

Better use QDialogs or QWidgets with only one (parent) QMainWindow.

[viniltc]

@jsulm @Gerhard @Pl45m4

Thanks a lot guys for the suggestions. The error was because I forgot to do qmake!