How do I set an QImage on a QLabel?

[Maluko_Da_Tola]

Hi

How do I set an QImage on a QLabel?
I'm really stuck!

Cheers

[toutarrive]

Try this:

int main(int argc, char** argv)
{
  QApplication app(argc, argv);
  QPixmap image("image.jpg");
  QLabel imageLabel();
  imageLabel.setPixmap(image);
  label.show();
  return app.exec();
}

int main(int argc, char** argv)
{
  QApplication app(argc, argv);
  QPixmap image("image.jpg");
  QLabel imageLabel();
  imageLabel.setPixmap(image);
  label.show();
  return app.exec();
}

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QImage is designed and optimized for I/O, and for direct pixel access and manipulation, while QPixmap is designed and optimized for showing images on screen

[Maluko_Da_Tola]

I'm trying to use QImage instead of QPixmap, because it is optimized for pixel manipulation.
I tried to create a QImage:

QImage image;
image = QImage(100, 100, QImage::Format_ARGB32);
image.fill(qRgb(0, 100, 100));

and then created a QLabel to set the image:

QLabel *labelImagem=new QLabel;
labelImagem->setPicture(image);

but it won't compile. Any suggestions what is going wrong?

Cheers

[ChrisW67]

What is the error message and what do you make of it? What are the argument types for setPicture()?

[Lykurg]

QLabel *labelImagem=new QLabel;
labelImagem->setPicture(image);

but it won't compile. Any suggestions what is going wrong?

Surprise, surprise. QImage != QPicture! use:

QLabel l;
l.setPixmap(QPixmap::fromImage(yourImage));

QLabel l;
l.setPixmap(QPixmap::fromImage(yourImage));

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