Qt Stylesheets not applying on my custom widgets

[trim fulcrum]

Good afternoon! I'm trying to figure out why my widget, which is a child of a QWidget, is ignoring the setStylesheet parameter. In the example, it should be colored green, but it ignores that. I've painted the background of the main window red so you can see it faster. And I added a button with a title so you can see where the widget is actually located. Can someone tell me what should I do to apply the style to it?

Qt 5.14.2 (gcc 5.3.1)

[spice parcel]

who taught you to use Qt?

[trim fulcrum]

I dont have teacher

[spice parcel]

did you learn to use Qt for youtube tutorials?

[trim fulcrum]

I found very few tutorials, they were all very primitive. Do you have something that you could advise?

[spice parcel]

you need to open the documentation of Qt, see how these classes work, see what pointers do they expect to receive, see what callback functions are supposed to do

and debug this example

and most importantly see how these classes handle errors

[trim fulcrum]

As I found in comments on strange forum, I must override function paintEvent()

But I did not find a mention of this in the documentation for QT. Now it works, but I'm not sure if it's the right solution.

[spice parcel]

let me repeat, read the documentation of Qt

[jovial vector]

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