Error message with QFileDialog

[gabor53]

Hi,
I have the following function (I used the same in a QDialog without any problems):

QPixmap myDelegate::getNewPix()
{
    QString sPath = "C:/";
    QFileDialog *fileDialog = new QFileDialog;
    fileDialog->getOpenFileName (Q_NULLPTR,sPath);

    fileName = fileDialog->getOpenFileName(Q_NULLPTR,
                                           tr("Finding Friend's replacement Image"),sPath, tr("Image Files (*.png *.jpg *.bmp)"));


    if(fileName == "")
        {
            qDebug() << "No image was chosen.";
//            QMessageBox::warning (this,"Error 1039","No image was choosen!");
        }
    else
        {
            qDebug() << "Image was chosen!";
        }

    QPixmap returnImage(fileName);

    QFile file(fileName);
    if(file.open (QIODevice::ReadOnly))
        {
            qDebug() << "File  is open!";
            fixByteArray = file.readAll ();
        }
    else
        {
            qDebug() << "File is not open!";
        }
    return returnImage;
}

When the file search window opens and I click on any of the folders I get the following error message in Application Output:
onecoreuap\shell\ext\thumbnailcache\lib\thumbcacheapi.cpp(285)\thumbcache.dll!5E1AFEFF: (caller: 5E19EF51) ReturnHr(1) tid(bf8) 80004005 Unspecified error.
Is this because it is not a QDialog but a delegate? Any way to eliminate it? Thank you for your help.

[jsulm]

@gabor53 getOpenFileName is a static method (http://doc.qt.io/qt-5/qfiledialog.html#getOpenFileName), that means you do not need a QFileDialog instance:

fileName = QFileDialog::getOpenFileName(Q_NULLPTR,
                                           tr("Finding Friend's replacement Image"),sPath, tr("Image Files (*.png *.jpg *.bmp)"));

[gabor53]

@jsulm
I did as you recommended. It works now (enters the folder and opens the file) but I still get the error messages.

[SGaist]

Hi,

How are you using that delegate ?

[gabor53]

@SGaist
What do you mean?
I use it to replace an image in the db.

[jsulm]

@gabor53 Besides that error - does your application work?

[gabor53]

@jsulm
Yes. It works ok.

[jsulm]

@gabor53 I think this error is not related to Qt. It is thumbnail functionality in Windows.
You can try to delete files in: C:\Users\YOUR_USER_NAME\AppData\Local\Microsoft\Windows\Explorer
(make copy of that files before deleting!)