Problem with SetIcon when using a png

Casisto88

Hello,

It's my first Post, so I hope I give you all the Informations you need. I am using pyside2 5.13.0 on Python 3.6.5 and install it with pip.

I write a Tool, where I have some QPushButtons. By User-Action, the displayed Icon has to be updated. I do that as followed:

/self.values[c_number][cnt].setIcon(QIcon(path))

When I'm using a JPG it's fine. But when I'm using a PNG, it didn't display anything. The Pushbutton turns grey and that is all.

Have you a suggestion what I can do?
I have tried the following, without any success:

self.values[c_number][cnt].repaint()
self.values[c_number][cnt].setIconSize(QSize(20,20))
self.values[c_number][cnt].setIconSize(QSize(80,80))
self.values[c_number][cnt].update()

Best regards

Casisto

SGaist

Hi and welcome to devnet,

Can you display that image on a QLabel ?

Casisto88

Thanks.
The problem stays when I display the image on a QLabel (as Pixmap). JPG are displayed, PNG not.

SGaist

Can you start the application with the QT_DEBUG_PLUGINS environment variable set to 1 ?

See what is related to the image plugins.

Casisto88

Maybe not. Referring to doc.qt.io/qtforpython there is no Variable named „QT_DEBUG_PLUGINS“ and my shoots in the blue dosn‘t work.

Casisto88

I‘ve use now a Build-In PNG2JPG-Converter (Pillow). It‘s very fast and has a good license.

I‘ll let the Topic open, maybe I got Time to observe the behaviour in some weeks. Now it‘s tracked as „known Issue“

SGaist

Because the environment variable is described here. The fact that you are using python is of no importance here.