Connexion de slot qui bug

Version imprimable

Bonjour, je me remet tout doucement à la prog en c++, mais voila j'ai un bug que je ne comprend pas, si on pouvais corriger mon code sous en me donnant une explication ce serai gentil:

Code:

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#include <QApplication>
#include <QFont>
#include <QGridLayout>
#include <QLCDNumber>
#include <QPushButton>
#include <QSlider>
#include <QVBoxLayout>
#include <QWidget>
 
class LCDRange : public QWidget
{
public:
        LCDRange(QWidget *parent = 0);
};
 
LCDRange::LCDRange(QWidget *parent)
        : QWidget(parent)
{
        QLCDNumber *lcd = new QLCDNumber(2);
        lcd->setSegmentStyle(QLCDNumber::Filled);
 
        QSlider *slider = new QSlider(Qt::Horizontal);
        slider->setRange(0, 99);
        slider->setValue(0);
        connect(slider, SIGNAL(valueChanged(int)),
                lcd, SLOT(display(int)));
 
        QVBoxLayout *layout = new QVBoxLayout;
        layout->addWidget(lcd);
        layout->addWidget(slider);
        setLayout(layout);
}
 
class MyWidget : public QWidget
{
public:
        MyWidget(QWidget *parent = 0);
public slots:
        void setValue();
private:
        QPushButton *button;
};
 
void MyWidget::setValue()
{
        button->setFont(QFont("Times", 18, QFont::Bold));
}
 
MyWidget::MyWidget(QWidget *parent)
        : QWidget(parent)
{
        QPushButton *quit = new QPushButton(tr("Quit"));
        quit->setFont(QFont("Times", 18, QFont::Bold));
        connect(quit, SIGNAL(clicked()), qApp, SLOT(quit()));
 
        QGridLayout *grid = new QGridLayout;
        for (int row = 0; row < 3; ++row) {
                for (int column = 0; column < 3; ++column) {
                        LCDRange *lcdRange = new LCDRange;
                        grid->addWidget(lcdRange, row, column);
                }
        }
 
        QVBoxLayout *layout2 = new QVBoxLayout;
        button = new QPushButton(tr("Button"));
        connect(button, SIGNAL(clicked()), this, SLOT(setValue()));
        layout2->addWidget(button);
        //layout2->addLayout(grid);
        //setLayout(layout2);
 
        QVBoxLayout *layout = new QVBoxLayout;
        layout->addWidget(quit);
        layout->addLayout(grid);
        layout->addLayout(layout2);
        setLayout(layout);
}
 
int main(int argc, char *argv[])
{
        QApplication app(argc, argv);
        MyWidget widget;
        widget.show();
        return app.exec();
}

En console ça me dit:
Object::connect: No such slot QWidget::setValue()

Et moi je cherche seulement à connecter mon bouton (button) à ma méthode setValue() de la classe MyWidget.

Merci de m'expliquer ou j'ai merder, car j'ai avec moi mon bouquain "C++ GUI programming with QT4" et depuis 2 semaine je me tape la tete contre les murs
:arf:

15/10/2007, 20h18
Matthieu Brucher

Il est où le Q_OBJECT ? http://miles.developpez.com/tutoriel...t/signal-slot/

Quand je met:

Code:

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class MyWidget : public QWidget
{
Q_OBJECT
public:
        MyWidget(QWidget *parent = 0);
public slots:
        void setValue();
private:
        QPushButton *button;
};

ca me fait:

Code:

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main.o: In function `MyWidget::MyWidget(QWidget*)':
main.cpp:(.text+0x3ae): undefined reference to `vtable for MyWidget'
main.cpp:(.text+0x3b6): undefined reference to `vtable for MyWidget'
main.cpp:(.text+0x3c2): undefined reference to `MyWidget::staticMetaObject'
main.cpp:(.text+0x4f8): undefined reference to `MyWidget::staticMetaObject'
main.o: In function `main':
main.cpp:(.text+0x6ff): undefined reference to `vtable for MyWidget'
main.cpp:(.text+0x708): undefined reference to `vtable for MyWidget'
main.cpp:(.text+0x750): undefined reference to `vtable for MyWidget'
main.cpp:(.text+0x759): undefined reference to `vtable for MyWidget'
main.o: In function `MyWidget::MyWidget(QWidget*)':
main.cpp:(.text+0x79e): undefined reference to `vtable for MyWidget'
main.o:main.cpp:(.text+0x7a6): more undefined references to `vtable for MyWidget' follow
main.o: In function `MyWidget::MyWidget(QWidget*)':
main.cpp:(.text+0x7b2): undefined reference to `MyWidget::staticMetaObject'
main.cpp:(.text+0x8e8): undefined reference to `MyWidget::staticMetaObject'
collect2: ld returned 1 exit status
make: *** [temp] Error 1

16/10/2007, 08h32
Matthieu Brucher

Tu as lu tout le tuto ?