getting icon from external applications

[mjzarrin]

hello dear friends
i prepare an uninstaller for windows. i need to get icon of every application beside program name in table widget.
after some googling i write a test code for getting icons but it not worked and my computer not respond to any thing until i kill the process.
this is my test code.

void MainWindow::on_pushButton_clicked()
{
    QFileInfo fin("C:/Program Files/CCleaner/CCleaner.exe");
    QTableWidgetItem *it = new QTableWidgetItem("Hello");
    QFileIconProvider qq;
    QIcon ic = qq.icon(fin);
    ui->tableWidget->insertRow(0);
    it->setIcon(ic);
    ui->tableWidget->setItem(0,0,it);
}

please help me what i must to do.
thanks

[jsulm]

I don't think you can use C:/Program Files/CCleaner/CCleaner.exe directly to create QIcon as it is an executable containing an icon but not just an icon. You need to extract the icon from the executable. I don't know how to do that. I know there is at least one open source exe thumb-nailer for Linux, maybe you can find some inspiration there. And I'm quite sure there is some specification/documentation for the Windows binary format (exe format). And finally you could use an hex editor and open a simple exe with embedded icon to see how it is stored there.

[raven-worx]

maybe this helps. I assume you need a Windows only solution?

[Devopia53]

@mjzarrin

Hi,

The QFileIconProvider class provides file icons for the QDirModel and the QFileSystemModel classes according to the Qt Docs.

If you need only application's icon, following code:

    QFileInfo  fin("C:/Program Files/CCleaner/CCleaner.exe");
    QTableWidgetItem *it = new QTableWidgetItem("Hello");
    QFileSystemModel *model = new QFileSystemModel;

    model->setRootPath(fin.path());

    QIcon ic = model->fileIcon(model->index(fin.filePath()));

    ui->tableWidget->insertRow(0);
    it->setIcon(ic);
    ui->tableWidget->setItem(0, 0, it);

or

QFileInfo  fin("C:/Program Files/CCleaner/CCleaner.exe");
QTableWidgetItem *it = new QTableWidgetItem("Hello");
QFileSystemModel  *model = new QFileSystemModel;

model->setRootPath(fin.path());

QFileIconProvider   *qq = model->iconProvider();
QIcon  ic = qq->icon(fin);

ui->tableWidget->insertRow(0);
it->setIcon(ic)
ui->tableWidget->setItem(0, 0, it);

[mjzarrin]

Hello My Friends
Thank you @jsulm .
Thank you @raven-worx .
and thank you @Devopia53 for the best and right solution. It work like a charm. It is what i need.
thanks.