[solved] Are models (which inherited from QAbstractItemModel) only working on 'Qt GUI Application'?

Hareen Laks

Hi all,

I would like to learn about Model/View programming. So I'm trying some examples.

I created a 'Qt Console Application' and edited the code as below.

@#include <QtCore/QCoreApplication>
#include <QFileSystemModel>
#include <QDebug>
#include <QDir>
#include <QModelIndex>

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

QFileSystemModel *model = new QFileSystemModel;
QModelIndex *parent_index = model->index(QDir::currentPath());
int num_rows = model->rowCount(parent_index);

for (int row = 0; row < num_rows; ++row) {
   QModelIndex *index = model->index(row,0,parent_index);
   qDebug() << model->data(index,Qt::DisplayRole);
}

return a.exec&#40;&#41;;

}@

But unfortunately, I'm getting following errors.

@.\ModelExample\main.cpp:2:28: error: QFileSystemModel: No such file or directory
..\ModelExample\main.cpp: In function 'int main(int, char**)':
..\ModelExample\main.cpp:13: error: 'QFileSystemModel' was not declared in this scope
..\ModelExample\main.cpp:13: error: 'model' was not declared in this scope
..\ModelExample\main.cpp:13: error: expected type-specifier before 'QFileSystemModel'
..\ModelExample\main.cpp:13: error: expected ';' before 'QFileSystemModel'@

It appear as my app not recognized the 'QFileSystemModel' class or Models cannot use here.

Can anyone help me?

Thanks for reading.

sierdzio

QFileSystemModel is part of QtWidgets module, so you need to add this to your .pro file:
@
QT += widgets
@

However, MVC is all about GUIs and displaying the information provided by the modeal and controller classes. So using this in a console application seems a bit pointless.

Hareen Laks

@ sierdzio,

Thank you for your answer. It is really helpful.