I wanna Add a button in the end of QTableView , i tried these ways but didn't work

[mrjj]

Hi
first thing.

for(int i=0; i<7 ; i++ ) {
 view->setIndexWidget(model->index(i,6), ViewProfile);
}

You cannot add same button to more than one cell. you have to create a new for each.

so it would be

for(int i=0; i<7 ; i++ ) {
 view->setIndexWidget(model->index(i,6), new QPushButton("ViewProfile"));
}

if you want a button in each cell.

---

Then

model->setData(item, QVariant::fromValue(view->show())

you try to store what the result of a function call (show is function) but
show() returns void so nothing to store.

What are you trying to store there ?

[MostafaEzzat]

@mrjj 
i did that right now also the button not included and this an image for the QTableView 
and for this line :
      //  model->setData(item, QVariant::fromValue(MyObject.getSpecificInformation()));

this line used with QSingleMapper so i don't know which object used with with that 
this piece of code contains full code of QsingleMapper way 
QSignalMapper *signalMapper = new QSignalMapper(this); [ QSignalMapper *signalMapper = new QSignalMapper(this);] 

for( int i=0; i<7; i++ ) { //replace rows.length with your list or vector which consists of the data for your rows.
     //do something with your data for normal cells...         
     auto item = model->index(i, 6);
     model->setData(item, QVariant::fromValue(yourObject.getSpecificInformation()));

     //make new button for this row 
     item = model->index(i, 6); 
     QPushButton *ViewProfile = new QPushButton("ViewProfile");
    view->setIndexWidget(item, ViewProfile);

     signalMapper->setMapping(ViewProfile, i);
     connect(cartButton, SIGNAL(clicked(bool)), signalMapper, SLOT(map()));
}
   connect(signalMapper, SIGNAL(mapped(int)), this, SLOT(on_pushButton_2_clicked()));

![alt text]("https://ibb.co/4FZYK2G")

an url of image if didn't appear  : "https://ibb.co/4FZYK2G"

[SGaist]

Can you reproduce that situation with a minimal compilable example ?

[MostafaEzzat]

@SGaist

this is the full function's code and for sorry the same result without printing the button and i got the code from StackOver Flow from this Answer "https://stackoverflow.com/a/36356873"
and maybe this code doesn't work coz of this line : model->setData(item, QVariant::fromValue(yourObject.getSpecificInformation()));

that i don't know which object should i replace here "yourObject.getSpecificInformation())" and if there any reliable solution would be better then .. and thank you for your efforts

void MainProcess::on_pushButton_2_clicked()
{
    QSqlDatabase  Databasee =   QSqlDatabase::addDatabase("QMYSQL" , "thirdConnection");
    Databasee.setHostName("localhost") ;
    Databasee.setUserName("root");
    Databasee.setPassword("mostafa");
    Databasee.setDatabaseName("Clinic_Database");

// Pls Notice that 'QSqlTableModel' doesn't work without making sure that database connected 

    if(Databasee.open()){
      QMessageBox::about(this,"res","databaseopen") ;


    }else {
        QMessageBox::about(this,"res","database not open") ;
        qDebug() <<  Databasee.lastError();
    }


    QSqlTableModel *model = new QSqlTableModel(this,  Databasee);
    model->setTable("PatientsInfo");
    model->setEditStrategy(QSqlTableModel::OnManualSubmit);
   model->select();
   model->setHeaderData(0, Qt::Horizontal, QObject::tr("PatientsName"));
   model->setHeaderData(1, Qt::Horizontal, QObject::tr("Age")) ;
   model->setHeaderData(2, Qt::Horizontal, QObject::tr("BloodPrint"));
   model->setHeaderData(3, Qt::Horizontal, QObject::tr("PhoneNum"));
   model->setHeaderData(4, Qt::Horizontal, QObject::tr("DiagnosisDisease"));
   model->setHeaderData(5, Qt::Horizontal, QObject::tr("consultant"));
   model->setHeaderData(6, Qt::Horizontal, QObject::tr("ViewProfile"));

   QTableView * view = new QTableView;
    QSignalMapper *signalMapper = new QSignalMapper(this);

   for( int i=0; i<7; i++ ) { //replace rows.length with your list or vector which consists of the data for your rows.
        //do something with your data for normal cells...
        auto item = model->index(i, 6);
     //   model->setData(item, QVariant::fromValue(model->getSpecificInformation()));
        //make new button for this row
        item = model->index(i, 6);
        QPushButton *ViewProfile = new QPushButton("ViewProfile");
        view->setIndexWidget(item, ViewProfile);
        signalMapper->setMapping(ViewProfile, i);
        connect(ViewProfile, SIGNAL(clicked(bool)), signalMapper, SLOT(map()));
   }
   connect(signalMapper, SIGNAL(mapped(int)), this, SLOT(on_pushButton_2_clicked()));

   view->setModel(model);
   view->show(); 
}

[dheerendra]

It is issue a with model not associated with view. Before associating model & view, you are trying to get the QModelIndex and setting the widget. You can't do this. index(model->index(i, 6);) what you are obtaining is from model which not associated with View. So move view->setModel before the for loop. Everything should work fine.

You can look at the simple example at GIT

connect(signalMapper, SIGNAL(mapped(int)), this, SLOT(on_pushButton_2_clicked()));

What is the above method. It is calling same method again when you click it. Is that what you wanted to do ?

[MostafaEzzat]

@dheerendra

it works sir thank you so much and i'll add the other parts to ViewProfile of patients .. but thing that i can't understand is why when i close QTableView it close the class itself which i click the button from it to execute the function of the button .. so to prevent that is there any solution except making another Header and Cpp files and execute Constructor in this function "void MainProcess::on_pushButton_2_clicked()
"

[dheerendra]

I did not understand the second part of your question. Can you tell explain more about the question ?

[MostafaEzzat]

@dheerendra

Yes for sure ,

here there is a designer form class called MainProcess so there is a Method called void MainProcess::on_pushButton_2_clicked()
if clicked it bringing data from database and preview it in a QTableView so if closed the QTableView and closes the MainProcess Class too so what should i do to make it isolate and don't lose the class
note pls : this class shows after checking login .. and i do appreciate all of your efforts

the url of image : "https://ibb.co/xSp23JN"

[dheerendra]

Looking at you code, it should not close the mainwindow. It should just close the QTableView only. I can see that you are showing only view->show() ; view does not have parent. Just to reconfirm, can you show how are you creating the tableview and showing it ?

[MostafaEzzat]

@dheerendra

Here in this function if the login successed it will show another window that has process of the programe which have QTableModel as well .. and i initialized a pointer MainProcess * mainprocess .. so it shows the the other Qt Designer form if the login done , and just included QTable and QModelIndex and press the button to get all data from database when click the button in the method which is "void MainProcess::on_pushButton_2_clicked()
can't be sure if it has relation with our method which has the QTableModel
"

void MainWindow::on_pushButton_3_clicked()
{
    QSqlDatabase Databas  = QSqlDatabase::database();
    /* if(QSqlDatabase::contains("qt_sql_default_connection")){
        Databas = QSqlDatabase::database("qt_sql_default_connection");
      qDebug() <<  "1" ;}
    else{
        Databas = QSqlDatabase::addDatabase("QMYSQL");
      qDebug() <<  "2" ;
    }*/
    Databas =   QSqlDatabase::addDatabase("QMYSQL", "SecConnection");
    Databas.setHostName("localhost") ;
    Databas.setUserName("root");
    Databas.setPassword("mostafa");
    Databas.setDatabaseName("Clinic_Database");
    if( QSqlDatabase::contains( "SecConnection" ) )
    {
        QSqlDatabase db = QSqlDatabase::database( "SecConnection" );
      qDebug() << "Donnne" ;
        //now do some stuff with it
    }
    else
    {
      qDebug()  << "something error" ;

        // connection not found, do something
    }
    if(Databas.open()){
        qDebug() <<  "Connected" ;
    }else {

       qDebug() << Databas.lastError().text();
      qDebug() << "not Connected";
    }

    QSqlQuery qr (Databas) ;
    qr.exec("select * from Employees") ;
    while(qr.next()) {
        qDebug() << qr.value(1) ;

    }

    QSqlQueryModel *model = new QSqlQueryModel();
    QSqlQuery *qry = new QSqlQuery(Databas);
    QString User = ui->lineEdit_Username_3->text();
    QString Pass = ui->lineEdit_2_Password_3->text() ;
    if(User==NULL||Pass==NULL) {

        QMessageBox::information(this,"Result","Pls Fill The User and Password") ;
        return ;

    }
         qry->prepare(" select Employees.Name , Employees.Password from  Employees WHERE Name = :User  AND  Password = :Pass ");
         qry->bindValue(":User", User) ;
         qry->bindValue(":Pass",Pass) ;

            if(qry->exec())
            {
                if(qry->next())
                {
                model->setQuery(*qry);
                QString  S =  qry->value(0).toString() + "Login Successed ";
                QMessageBox::information(this,"Result",S) ;
                hide();
                mainprocess = new MainProcess(this) ;
                mainprocess->show();
                }
                else
                    {
                   QMessageBox::information(this,"Result","Sorry Try Again") ;
                   qDebug() << qry->lastError();
                    }

              }
                      else {qDebug() << qry->lastError();}
   }

[dheerendra]

No it is nothing to do with this method. This has no relation to another slots. Have you looked at the example which I have given y'day ?

[MostafaEzzat]

@dheerendra
yes for sure i've checked it and make it as yours (initialized QSqlTableModel and QTableView in the header file)

now i create another islolated header and cpp file and put the function i wanna do in them and also same problem that if i closed QTableView it closes the other class , it executes the function but also closes

this is the link of files on GitHub : https://github.com/MOSTAFAEZZAT/QTableViewProlem

Update : Sir this Problem is solved now it was because of initializing the next window by pointer not as usual object
i.e :

class MainWindow : public QMainWindow
{
    

    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_pushButton_3_clicked();
    void on_pushButton_4_clicked();
    void on_pushButton_8_clicked();

private:
    Ui::MainWindow * ui;
    MainProcess    mainprocess ;

};

this is a piece of function which if the login done show the next Window else no

  if(qry->exec())
            {
                if(qry->next())
                {
                model->setQuery(*qry);
                QString  S =  qry->value(0).toString() + "Login Successed ";
                QMessageBox::information(this,"Result",S) ;
                hide();
            //    mainprocess = new MainProcess(this) ;
                mainprocess.show();
                }
                else
                    {
                   QMessageBox::information(this,"Result","Sorry Try Again") ;
                   qDebug() << qry->lastError();
                    }

              }

so in previous
it was like that
MainProcess * mainprocess

but pls i just wanna know why it was destroying this window(MainProcess) if i closed QTableView .. And Thank you so much in Advance