Question

This is my first time Qt programming. I am to make an address book on relational database to keep track of calls and events, related to persons and companies. A simple home-made sales tool. I am in great need of it.

Using Qt Designer I have created a main window and placed a QTableView widget. Installed SQLite, created a database. Now I need to connect it to the QTableView. I spent several hours, and still couldn’t do it.

Can someone please help?

Thanks!

Some code:

untitled9.pro:

#-------------------------------------------------
#
# Project created by QtCreator 2012-10-26T14:35:12
#
#-------------------------------------------------

QT       += core gui
QT       += sql

TARGET = untitled9
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

private slots:
    void on_menu_exit_triggered();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

main.cpp:

#include <QtGui/QApplication>
#include "mainwindow.h"
#include <QTableView>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;

    w.show();

    QTableView *tableView;

    return a.exec();
}

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

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

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

void MainWindow::on_menu_exit_triggered()
{
  QCoreApplication::quit ();
}

And, there is also a long xml in mainwindow.ui. I’ll post it here in case of need.

Thanks!

Answer 1

You should check the model-view related Qt documentation.

In general, you will need a [QSqlTableModel][2] which will correspond to a database table. Then you just need to attach it to a table view.

// Let a table A, with the following columns : id, column1, column2
QSqlTableModel *model = new QSqlTableModel(parentObject, database);
model->setTable("A");
model->setEditStrategy(QSqlTableModel::OnManualSubmit);
model->select();
model->removeColumn(0); // don't show the ID
model->setHeaderData(0, Qt::Horizontal, tr("Column 1"));
model->setHeaderData(1, Qt::Horizontal, tr("Column 2"));

// Attach it to the view
ui->view->setModel(model);