CODEWITHSUNDEEP
c++qt
Elyss
Elyss

Reputation: 25

How to save a QPixmap as a picture in a folder with C++ and Qt?

I'm trying to code a C++ function to save a selected picture to my program directory, using a Qt GUI.

So far, the "save" function I'm using on my QPixmap object won't save anything, and I can't figure out why.

Here is the code :

qImage = new QPixmap(path);
QPixmap qImage2 = qImage->scaled(this->width(),this->height(), Qt::KeepAspectRatio, Qt::SmoothTransformation);

qImage2.toImage();

qImage2.save(QDir::currentPath());
qDebug()<<QDir::currentPath();

Can anyone help me ? :)

Upvotes: 1

Views: 1993

Answers (1)

kefir500
kefir500

Reputation: 4404

  • QDir::currentPath() returns the current working directory. Obviously, the filename itself is not specified. Simply append the needed filename, for example: QDir::currentPath() + "/123.png"

  • QPixmap::toImage() is a const method returning a QImage converted from a QPixmap. It literally does nothing useful in your code, remove it or use QImage instead.

  • QDir::currentPath() returns the current working directory which is not necessarily an application executable directory. Use QCoreApplication::applicationDirPath() instead if you need an executable directory.
  • Also, as pointed out by Violet Giraffe, there could be write permission issues.

Upvotes: 1

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