Invisible buttons

[Nafab213]

Hello
I have a window create in Qt designer.
I inserted two standard buttons "bttoncene and bttoncenep" on the main window in Gridlayout.
But the buttons are not displayed when I compile.

The code.h

#ifndef FENPRINCIPALE_H
#define FENPRINCIPALE_H

#include <QMainWindow>
#include <QWidget>
#include <QStackedWidget>
#include "fencene.h"
#include "fencenep.h"


namespace Ui {
class FenPrincipale;
}

class FenPrincipale : public QMainWindow
{
    Q_OBJECT

public:
    explicit FenPrincipale(QWidget *parent = 0);
    ~FenPrincipale();

private:
    Ui::FenPrincipale *ui;
    QStackedWidget *centralfencen;


public slots:
    void Affichefencene();
    void Affichefencenep();

};

#endif // FENPRINCIPALE_H

The code.cpp

#include "fenprincipale.h"
#include "ui_fenprincipale.h"
#include "fencene.h"
#include "fencenep.h"
#include <QStackedWidget>

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

    centralfencen = new QStackedWidget;
    centralfencen ->addWidget(new FenCene);
    centralfencen ->addWidget(new FenCenep);
    setCentralWidget(centralfencen);

    connect(ui->bttoncene, &QPushButton::clicked, this, &FenPrincipale::Affichefencene);
    connect(ui->bttoncenep,  &QPushButton::clicked, this, &FenPrincipale::Affichefencenep);
}

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

void FenPrincipale::Affichefencene()
{
    centralfencen->setCurrentIndex(0);
}

void FenPrincipale::Affichefencenep()
{
   centralfencen->setCurrentIndex(1);
}

Where did I make a mistake?
Thank you in advance

[mpergand]

@Nafab213 said in Invisible buttons:

ui->setupUi(this);

setCentralWidget(centralfencen);

The second line replace what you did in the Designer with centralfencen. (c'est ballot !)

You have to position the buttons somewhere else (in a Toolbar for ex) or place centralfen in the grid itself.

[Nafab213]

I place the buttons in the toolbar? Or elsewhere ?
I don't understand..
I would like to display both buttons on the main window.
How can I do it? I show them how?
Thnks

[jsulm]

@Nafab213 As @mpergand said you're replacing central widget with another one. Your buttons are in the central widget, then you create a new widget and set it as new central widget - how can you expect to see the buttons which are placed on a central widget you just replaced? Simply use the central widget you're already using (don't call setCentralWidget) and add centralfencen to the existing layout.