Problem with QPixmap

[michaelboybo]

Hi

I'm trying to load an image into a QPixmap object, here is my code:


QPixmap blackKingPixmap;
std::cout << "Hello";
blackKingPixmap.load("images/black_king.png");
std::cout << "Hello";

When I run it, I only see one 'Hello' printed to the console, shortly after that the program terminates without printing the second 'Hello'.
I don't get any error messages when I run it, it simply just terminates. I have tried putting the 'images' folder in the 'resources' folder, and in the same folder as the .cpp file. I have tried taking the images out of the folder and putting them directly in the 'resources' folder. I have tried specifying the absolute path to the image ('C:<user>/ etcetc'). I even tried loading the image to a QImage first and then trying to create the QPixmap from the QImage. I have checked that the image definitely exists at the specified path, and that the permissions for accessing the image are correct. All of which to no avail! Basically I have tried everything that I (or ChatGPT) could think of to fix it, none of it worked.

Can someone please help me? (Or put me out of my misery haha)

Thanks a lot,
Michael

[zvoopz]

You need to set a container for your QPixmap. I do as follows and maybe you can try

ui->label_picRange->setVisible(true); //QLabel for image was defined in mainwindow.ui
picRange = QPixmap(":/img/picRange.jpg");  //QPixmap picRange was declared in the header
    if (picRange.isNull()) {
        qDebug() << "Failed to load picRange.jpg";
    } else {
//putting the image into the label
    ui->label_picRange->setPixmap(picRange.scaled(ui->label_picRange->width(), ui->label_picRange->height(), Qt::KeepAspectRatio));
    }

ui->label_picRange->setVisible(true); //QLabel for image was defined in mainwindow.ui
picRange = QPixmap(":/img/picRange.jpg");  //QPixmap picRange was declared in the header
    if (picRange.isNull()) {
        qDebug() << "Failed to load picRange.jpg";
    } else {
//putting the image into the label
    ui->label_picRange->setPixmap(picRange.scaled(ui->label_picRange->width(), ui->label_picRange->height(), Qt::KeepAspectRatio));
    }

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[Ginsengelf]

Hi, I think you should use a debugger to see what's going on there. Maybe check if the pixmap file itself is corrupted? Can you open it with other tools?

Ginsengelf

[KyleighCormier]

Always make sure to use the full path or double-check the path relative to the working directory. Use functions like QFileInfo::exists() to check the file before downloading.