Show picture using QLabel and Pixmap

[Fedi]

I'm beginner in Qt and I couldn't display a picture using QPixmap and QLabel.
The code I wrote is :
QLabel *img = new QLabel(tab);
img->setPixmap(QPixmap(":/Users/Learner/Desktop/photo.png"));
tab is a pointer to the parent widget.
I don't know what's wrong with this code , there is no compilation error but , the picture is not displayed . Is there anyone who can help me ??

[jsulm]

@Fedi said in Show picture using QLabel and Pixmap:

:/Users/Learner/Desktop/photo.png

Is your image in a resource file or are you trying to load a file from the file system? If file system then you're missing the drive letter.

[joeQ]

@Fedi Hi, friend, welcome.

You can reference code snippet below.

    QString filename = "xxxxx";
    QLabel* lbl = new QLabel(this);
    /** set content to show center in label */
    lbl->setAlignment(Qt::AlignCenter);
    QPixmap pix;

    /** to check wether load ok */
    if(pix.load(filename)){
        /** scale pixmap to fit in label'size and keep ratio of pixmap */
        pix = pix.scaled(lbl->size(),Qt::KeepAspectRatio);
        lbl->setPixmap(pix);
    }

[Vinod Kuntoji]

@Fedi ,

Your pixmap is not scaled.

QPixmap pix(":/Users/Learner/Desktop/photo.png");
int w = img->width ();
int h = img->height ();
img->setPixmap (pix.scaled (w,h,Qt::KeepAspectRatio));

[Yashpal]

@Fedi

• Make sure your label or it's parent widget is visible.

• Make sure QPixmap object is not NULL.

• Try whether plain text appears on QLabel.

[SGaist]

Hi and welcome to devnet,

As @jsulm asked, are you using an image using Qt's resource system ?

If not then:

• If you are running Windows, then @jsulm is right regarding the missing letter
• If you are running macOS, then drop the :.

[Amogh]

QPixmap m_logo_pic;
QLabel *m_pic_label;
m_pic_label=new QLabel();

    m_logo_pic.load(":/image/bank.png");
    m_pic_label->setPixmap(m_logo_pic);
////Place the labe in the layout

[Fedi]

@jsulm you are right bro , now it works ,thx :))

[Pradeep Kumar]

Hi,

@Fedi , glad u got solution , can u mark as solved.

Thanks,

[Fedi]

@joeQ I've just added the drive letter to my code and it works ! the solution you gave me works as well, thx a lot :D

[SGaist]

Don't forget that using such a hardcoded value won't make your application portable.