CODEWITHSUNDEEP
c++qtqt4qpixmap
Muhammad Bilal Maqsood
Muhammad Bilal Maqsood

Reputation: 15

QPixmap not working with image path stored in variable

when I write the image path directly like this 

QPixmap imgBtry("/some/path/resources/Battery100.png");

it works perfectly but its not working when i store the path in a variable. What should i do? Following is the complete code.

//global variables
std::string path;
std::string img100 = "/some/path/resources/Battery100.png";
std::string img75 = "/some/path/resources/Battery75.png";
std::string img50 = "/some/path/resources/Battery50.png";
std::string img25 = "/some/path/resources/Battery25.png";

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    QPixmap imgBtry(img50);
    ui->label_2->setPixmap(imgBtry.scaled(50,50,Qt::IgnoreAspectRatio,Qt::FastTransformation));
}

Upvotes: 1

Views: 1426

Answers (1)

user2910256
user2910256

Reputation: 26

What error do you get? A guess could be:

The QPixmap constructor takes a QString as argument. It works when you put the string directly because it is a c-string (char *) and QString have an constructor taking an c-string as input. But have no constructor taking a std::string as input.

So either:

1) define your strings as c-strings.

or

2) convert your std::strings to c-strings before calling QPixmap:

QPixmap imgBtry(img50.c_str());

Upvotes: 1

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