Clicked signal not emitted

[dual]

Hello guys,
I have a problem: i connected the clicked signal to a slot function but it is never emitted even if the PushButton looks as pressed and release graphically.
Using emit button->clicked() the signal is fired, so I think that the connect works well.

I paste here some code:

void Ui_MainWindow::setupUi(QMainWindow *MainWindow)
{
    if (MainWindow->objectName().isEmpty())
        MainWindow->setObjectName(QString::fromUtf8("MainWindow"));
    MainWindow->resize(800, 600);
    actionNew_File = new QAction(MainWindow);
    actionNew_File->setObjectName(QString::fromUtf8("actionNew_File"));
    actionOpen_File = new QAction(MainWindow);
    actionOpen_File->setObjectName(QString::fromUtf8("actionOpen_File"));
    actionLogout = new QAction(MainWindow);
    actionLogout->setObjectName(QString::fromUtf8("actionLogout"));
    actionTintero_0_1 = new QAction(MainWindow);
    actionTintero_0_1->setObjectName(QString::fromUtf8("actionTintero_0_1"));
    centralwidget = new QWidget(MainWindow);
    centralwidget->setObjectName(QString::fromUtf8("centralwidget"));
    verticalLayoutWidget = new QWidget(centralwidget);
    verticalLayoutWidget->setObjectName(QString::fromUtf8("verticalLayoutWidget"));
    verticalLayoutWidget->setGeometry(QRect(10, 30, 191, 501));
    verticalLayout = new QVBoxLayout(verticalLayoutWidget);
    verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
    verticalLayout->setContentsMargins(0, 0, 0, 0);


    avatarLabel = new ClickableLabel(verticalLayoutWidget);
    avatarLabel->setObjectName(QString::fromUtf8("avatarLabel"));
    avatarLabel->setAlignment(Qt::AlignCenter);

    verticalLayout->addWidget(avatarLabel);

    usernameLabel = new QLabel(verticalLayoutWidget);
    usernameLabel->setObjectName(QString::fromUtf8("usernameLabel"));
    usernameLabel->setAlignment(Qt::AlignCenter);

    verticalLayout->addWidget(usernameLabel);

    recentDocsLabel = new QListView(verticalLayoutWidget);
    recentDocsLabel->setObjectName(QString::fromUtf8("recentDocsLabel"));

    verticalLayout->addWidget(recentDocsLabel);


    scrollArea = new QScrollArea(centralwidget);
    scrollArea->setObjectName(QString::fromUtf8("scrollArea"));
    scrollArea->setGeometry(QRect(210, 30, 581, 501));
    scrollArea->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
    scrollArea->setVerticalScrollBarPolicy( Qt::ScrollBarAsNeeded);
    scrollArea->setWidgetResizable(true);
    scrollAreaWidgetContents = new QWidget();
    scrollAreaWidgetContents->setObjectName(QString::fromUtf8("scrollAreaWidgetContents"));
    scrollAreaWidgetContents->setGeometry(QRect(0, 0, 579, 499));
    docTableWdg = new QGridLayout(scrollAreaWidgetContents);
    docTableWdg->setObjectName(QString::fromUtf8("docTableWdg"));
    docTableWdg->setGeometry(QRect(10, 10, 561, 481));
    scrollArea->setWidget(scrollAreaWidgetContents);

[...]

} // setupUi

[...] 
QLabel *newDoc = new QLabel();

auto createDocButton = new QPushButton();
    createDocButton->setEnabled(true);
    createDocButton->setText("new document");

  QFrame *container = new QFrame();
    container->setLayout(new QVBoxLayout);
    container->layout()->addWidget(newDoc);
    container->layout()->addWidget(createDocButton);



    this->docTableWdg->addWidget(container, 0, 0);

bool success = connect(createDocButton, &QAbstractButton::clicked, this, &Ui_MainWindow::createDocument);
qDebug()<<success; //this prints true
[...]
void Ui_MainWindow::createDocument(){
    qDebug()<<"i'm here";
}

Thanks in advance for helping

[jay1]

@dual said in Clicked signal not emitted:

createDocument

Is the

createDocument()

function created as a slot ?

[dual]

@jay1 yup, it is

[...]
private slots:
    void createDocument();
[...]

[mrjj]

@dual
Hi
The name seems a bit odd Ui_MainWindow.
You are not editing the auto-generated file ?

class Ui_MainWindow
{
public:
    QWidget *centralwidget;
.....
    void setupUi(QMainWindow *MainWindow)
    {

This one ?
it has this warning in top

maybe you must expand it.

I would assume

void Ui_MainWindow::createDocument(){
qDebug()<<"i'm here";
}

should be

void MainWindow::createDocument(){
qDebug()<<"i'm here";
}

[dual]

@mrjj yes I'm using the auto-generated file but I deleted from my project the .ui file in order to avoid the problem in the top comment.
I paste here the class declaration:

class Ui_MainWindow : public QMainWindow
{
    Q_OBJECT


private:
[...]
    QWidget *centralwidget;
    QWidget *verticalLayoutWidget;
    QVBoxLayout *verticalLayout;
[...]

Btw emitting the "clicked" signal in code, the slot triggers.

[SGaist]

Hi,

Do not edit the auto-generated file. It even has a warning on top saying so.

You have to edit the other on that makes use of that generated class.

[dual]

@SGaist hi, thanks for the reply.
Can you explain better this concept? I've previously modified the auto-generated file with other stuff, but the only thing that doesn't work is the pushButton, the remaining stuff works well.

Sorry for these silly questions, but I am a newbie in qt.

[SGaist]

The most simple is to take a look at the Qt Designer Calculator Form Example.

[dual]

@SGaist thank you again. So my last question is: how can I modify the gui obtained with the auto-generated file in a "legal" way? Is it possible in code or should I draw the .ui file and auto-generate the .h file again? And again, let's suppose I have to modify an auto-gen .h file in some way after some time, how can I do?

[SGaist]

What modifications do you have in mind ?
Again, this is a generated file so do not even store in your version control system. It's created based on the .ui file and will be regenerated when that file is modified.

[dual]

@SGaist I need to change the displayed object dynamically: I have a scroll area, a grid layout and some labels in it, but the number of labels is not fixed and may change over time. How can I manage this problem?

[jsulm]

@dual In your main window (MainWindow class or whatever name you gave it not Ui_MainWindow) you can access your UI widgets/layouts via ui->WIDGET_NAME.