Throbber transparency with QToolbar

stef.pellegrino

Hi,
I'm trying to add an animated gif on a QToolbar()
Almost work, doing that:

    mov = QMovie("waiting.gif", parent=self)
    lbl = QLabel(self)

    mov.setScaledSize(QSize(32, 32))
    lbl.setMovie(mov)
    lbl.setAttribute(Qt.WidgetAttribute.WA_NoSystemBackground)
    lbl.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground)
    my_toolbar.addWidget(lbl)
    mov.start()

But, doesn't work, the background remains black !!

Perhaps something to do/change with the gif itself ?

Any ideas ?
Thanks for you help

jsulm

@stef-pellegrino said in Throbber transparency with QToolbar:

mov = QMovie("waiting.gif", parent=self)

You are using a relative path to the image: are you sure your app can find it at runtime?
You should put it into a resource: https://doc.qt.io/qt-6/resources.html

stef.pellegrino

@jsulm Yes the gis is well loaded.

I think the issue comes from the background of the gif itself

JonB

@stef-pellegrino Well let's start with: does the GIF have a background?

stef.pellegrino

@JonB Hi,

Ok, sorry for wasting your time, the gif "transparent region" was setting on black, I changed it to "white" and it works !
Nevertheless Don't really know why !? (I need some tutorials about gif transparency I guess :))