QLabel does not show image

[Mobility]

Hi guys,

Simple case, just cannot figure out what I'm doing wrong. I'm using Qt Creator to create simple application. At the first phase, I only want it to show a image in QLabel.

This is what I have done:

1. Added the image to resource file.
2. Added a QLabel to the window.
3. From the property menu of the QLabel, I have added the image using QLabel->Pixmap option. As a result the image is shown in the Qt Creator just fine and it also shows fine when using the preview tool (ctrl+alt+r).
4. Everything seem to be fine, but when running the app the image is not shown.

I also tried setting the image to the QLabel in the cpp, but it didn't help either:

QPixmap pixmap( ":/pics/test.jpg" );
    ui->label_2->setPixmap(pixmap);

QPixmap pixmap( ":/pics/test.jpg" );
    ui->label_2->setPixmap(pixmap);

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Then also checked the app with Dependency Walker and nothing seems to be missing.

Any idea what's wrong?

Cheers!

[wysota]

http://www.qtcentre.org/faq.php?faq=...missing_images

[saman_artorious]

Hi guys,
I also tried setting the image to the QLabel in the cpp, but it didn't help either:

QLabel *love = new QLabel();
    QImage myImage;
    myImage.load(":/xxx.png");
    QImage image = myImage.scaled(love->width(), love->height(), Qt::IgnoreAspectRatio );
    love->setPixmap(QPixmap::fromImage(image));
    love->show();

QLabel *love = new QLabel();
    QImage myImage;
    myImage.load(":/xxx.png");
    QImage image = myImage.scaled(love->width(), love->height(), Qt::IgnoreAspectRatio );
    love->setPixmap(QPixmap::fromImage(image));
    love->show();

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[Mobility]

Thanks for your quick replies! Problem was after all with the location of the imageformats folder. I have my sql drivers in app/plugins/sqldrivers directory, so I put the imageformats folder also under app/plugins. Correct place is app/. Wonder why Dependency Walker did not notice this... Anyway now it works, thanks again!

[wysota]

sqldrivers and imageformats should be in the same directory. Unless you somehow changed the default Qt behaviour for your application, your app does not search for sql plugins in the correct place. Try renaming this directory to something else and see if your app reports a missing SQL driver.