QPixmap png transparency

[rspock]

I have a png with transparency but when I run the application it became white.

Do I have to do something to set the transparency?

[wysota]

You have to paint it on something else than white background

[rspock]

I've a blue background and I see white at the transparency area.

[droneone]

Show us how you're drawing your pixmap. Are you creating a pixmap and painting it to the screen, or are you doing something with QSS?

[rspock]

if (!product["icon"].isEmpty()){
QPixmap* pixmap = new QPixmap(product["icon"]);
QIcon icon(*pixmap);
QSize iconSize(pixmap->width(), pixmap->height());
button->setIconSize(iconSize);
button->setIcon(icon);

button->setFixedSize(pixmap->width(),pixmap->height());
//button->setFlat(true);
}

[wysota]

Apart from superflous use of the new operator this code is fine. The problem has to be elsewhere (e.g. your image is not transparent).

[ChrisW67]

.. or you are viewing your image on top of a white background.

[wysota]

That's what I already suggested but OP insists the background is blue

[ChrisW67]

Indeed, please forgive my failure of early morning reading comprehension.