How to call a dialog from a mainwindow

[luiz4um]

I want to build an interface and I need to link a pushbutton in a mainwindow with a dialog. Both were made in Qt Designer. I tried some answers that I saw in others thread but I think it doesn't help me. So, here it goes my codes:
Mainwindow: telainicial (.h/.cpp)
Dialog: simples (.h/.cpp)

telainicial.h

#ifndef TELAINICIAL_H
#define TELAINICIAL_H
 
#include <QMainWindow>
#include "ui_telainicial.h"
 
class telainicial : public QMainWindow, public Ui::telainicial {
    Q_OBJECT
public:
    telainicial(QWidget *parent = 0);
private slots:
    void telasimples();
};
 
#endif // TELAINICIAL_H

#ifndef TELAINICIAL_H
#define TELAINICIAL_H

#include <QMainWindow>
#include "ui_telainicial.h"

class telainicial : public QMainWindow, public Ui::telainicial {
    Q_OBJECT
public:
    telainicial(QWidget *parent = 0);
private slots:
    void telasimples();
};

#endif // TELAINICIAL_H

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telainicial.cpp

#include <QtGui>
#include "telainicial.h"
#include "simples.h"
 
telainicial::telainicial(QWidget *parent) :
    QMainWindow(parent)
 
{
    setupUi(this);
 
    connect(lentesimplesButton, SIGNAL(clicked()), this, SLOT(telasimples()));
 
}
 
void telainicial::telasimples(){
 
    //code goes here
 
 };

#include <QtGui>
#include "telainicial.h"
#include "simples.h"

telainicial::telainicial(QWidget *parent) :
    QMainWindow(parent)

{
    setupUi(this);

    connect(lentesimplesButton, SIGNAL(clicked()), this, SLOT(telasimples()));

}

void telainicial::telasimples(){

    //code goes here

 };

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simples.h

#ifndef SIMPLES_H
#define SIMPLES_H
 
#include <QDialog>
#include "ui_simples.h"
 
class simples : public QDialog, public Ui::simples {
    Q_OBJECT
 
public:
    simples(QWidget *parent = 0);
 
};
 
#endif

#ifndef SIMPLES_H
#define SIMPLES_H

#include <QDialog>
#include "ui_simples.h"

class simples : public QDialog, public Ui::simples {
    Q_OBJECT

public:
    simples(QWidget *parent = 0);

};

#endif

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simples.cpp

#include "simples.h"
#include <QtGui>
 
simples::simples(QWidget *parent) :
    QDialog(parent)
 
{
    setupUi(this);
}

#include "simples.h"
#include <QtGui>

simples::simples(QWidget *parent) :
    QDialog(parent)

{
    setupUi(this);
}

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The mains files are similiar like this:

#include <QtGui/QApplication>
#include "telainicial.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    telainicial mainwindow;
    mainwindow.show();
    return app.exec();
}

#include <QtGui/QApplication>
#include "telainicial.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    telainicial mainwindow;
    mainwindow.show();
    return app.exec();
}

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Can somebody help me?

[luiz4um]

I've tried:
simples dialog(this);
dialog.exec();

But it fails. The follow problem is detected:
undifined reference to 'simple::simple(QWidget*)'
undifined reference to 'vtable for simples'
undifined reference to 'vtable for simples'
collect2: Id returned 1 exit status

Someone knows what is it?

[wysota]

Run qmake and then build your program again. Btw. your class is called "simples" and you are calling the constructor as "simple".

[luiz4um]

My mistake. The follow problem was detected:
undifined reference to 'simples::simples(QWidget*)'

It's not a problem about compilation I think. I'm using the Qt Creator to do everything, like designer the ui files and compile the program. Is there any problem to do it?

[wysota]

Again, check if you actually implemented the simples constructor.

[luiz4um]

Yes, it works individually. But not when I call it by mainwindow. All my constructors are correct. I just don't know what to do... I've tried everything... Is it better to make the .pro file in the Qt Command Prompt? If you can run my codes on your pc (try to do it in Qt Creator)...

[wysota]

What "works individually"? The .pro file is not an issue here, the linker can't find the implementation of your constructor. Could you post the contents of the offending method?

[luiz4um]

I don't know exactly what are you asking for. I'm a beginner. Can I send my files to you by email? Sorry bother you, but it's important... :/

[wysota]

Please post the body of the constructor of class "simples". I hope you know what a constructor is... If not, you should first learn at least basics of C++ before taking on Qt.

[luiz4um]

I try to search in my files about C++ something connect to constructor class but I don't find a good answer. So, I again ask you with you can give me a example of constructor class. I'm still lost here. The following compile output appear when I run telainicial mainwindow:

g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -mthreads -Wl -Wl,-subsystem,windows -o debug\TelaPrincipal.exe debug/main.o debug/telainicial.o debug/moc_telainicial.o -L"f:\QT\2010.02.1\qt\lib" -lopengl32 -lglu32 -lgdi32 -luser32 -lmingw32 -lqtmaind -lQtOpenGLd4 -lQtGuid4 -lQtCored4
mingw32-make[1]: Leaving directory `C:/Users/Luiz Paulo/Documents/TelaPrincipal'
mingw32-make: Leaving directory `C:/Users/Luiz Paulo/Documents/TelaPrincipal'
[r]debug/telainicial.o:C:\Users\Luiz Paulo\Documents\TelaPrincipal/telainicial.cpp:16: undefined reference to `simples::simples(QWidget*)'
debug/telainicial.o: In function `~simples':
C:\Users\Luiz Paulo\Documents\TelaPrincipal/simples.h:7: undefined reference to `vtable for simples'
C:\Users\Luiz Paulo\Documents\TelaPrincipal/simples.h:7: undefined reference to `vtable for simples'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\TelaPrincipal.exe] Error 1
mingw32-make: *** [debug] Error 2
Exited with code 2.
Error while building project TelaPrincipal
When executing build step 'Make'[/r]

[squidge]

1) run qmake from the menu
2) rebuild your project
3) if it still doesn't work, post simples.h and simples.cpp if they are now different to your first post

[luiz4um]

It's already posted on top. Can you see? There are 4 codes... 2 of them are this codes...

[wysota]

My bet is you didn't add simples.cpp to SOURCES in your project file. At least I can't see simples.o being linked into the binary.

[luiz4um]

Can be... now I tried it but the compilation stop to work and when I check the compile output this message was shown:
Running build steps for project TelaPrincipal...
Starting: f:/qt/2010.02.1/qt/bin/qmake.exe C:/Users/Luiz Paulo/Documents/TelaPrincipal/TelaPrincipal.pro -spec win32-g++ -r
c:\Users\Luiz Paulo\Documents\TelaPrincipal\TelaPrincipal.pro:15 : Parse Error ('simples.cpp')
Error processing project file: C:/Users/Luiz Paulo/Documents/TelaPrincipal/TelaPrincipal.pro
Exited with code 3.
Error while building project TelaPrincipal
When executing build step 'QMake'

Just one doubt... Which simples's files have to be in the same folder that the mainwindow's folder? Cause when I made both, I made it individually, so each one have a specific folder. But, I copy and put the simples.h, simples.cpp, ui_simples.h in the mainwindow's folder...

[wysota]

Did you add simples.cpp to the SOURCES variable or did you just put it in the project file in a random place?

You can place the actual files anywhere you want as long as you tell the compiler where to find them.

[luiz4um]

How I tell the compiler where is the dialog files? Sorry the stupid question... I'm noob about Qt...

[wysota]

You need a proper project file. Could you post its contents?

[luiz4um]

The files .pro are below:

telainicial.pro:

#-------------------------------------------------
#
# Project created by QtCreator 2010-05-14T10:13:43
#
#-------------------------------------------------
 
QT       += opengl
 
TARGET = TelaPrincipal
TEMPLATE = app
 
 
SOURCES += main.cpp\
        telainicial.cpp
        simples.cpp
 
HEADERS  += telainicial.h
 
FORMS    += telainicial.ui

#-------------------------------------------------
#
# Project created by QtCreator 2010-05-14T10:13:43
#
#-------------------------------------------------

QT       += opengl

TARGET = TelaPrincipal
TEMPLATE = app


SOURCES += main.cpp\
        telainicial.cpp
        simples.cpp

HEADERS  += telainicial.h

FORMS    += telainicial.ui

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simples.pro:

#-------------------------------------------------
#
# Project created by QtCreator 2010-05-14T10:47:49
#
#-------------------------------------------------
 
QT       += opengl
 
TARGET = LenteSimples
TEMPLATE = app
 
 
SOURCES += main.cpp\
        simples.cpp
 
HEADERS  += simples.h
 
FORMS    += simples.ui

#-------------------------------------------------
#
# Project created by QtCreator 2010-05-14T10:47:49
#
#-------------------------------------------------

QT       += opengl

TARGET = LenteSimples
TEMPLATE = app


SOURCES += main.cpp\
        simples.cpp

HEADERS  += simples.h

FORMS    += simples.ui

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Are this files you want to see?

[wysota]

Look at your first project file. simples.cpp is not part of the SOURCES variable.

[luiz4um]

It was missing a "\" after telainicial.cpp... I corrected it.
But where I put the local where the dialog (simples) is located?