How to create your own design in Qt?

Question

Qt

This question, probably, has already bothered many, but still, after searching the Internet, I did not find answers to my questions. How to implement my own design in Qt, for example buttons? Draw a button in advance in photoshop and paste it as an icon - a working solution or a crutch? If I need to fit the active area of ​​the widget (the zone that accepts clicks on the button, respectively) to the visible part, how can I do this?
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There are more useful links in the comments to create your own style

Answer 1

Depends on what technology is being used. If QtWidgets, then we do QSS . But today it is already obsolete, and therefore it is better to use QML - in this case, you should look at how the design is implemented in the Qt Quick Controls 2 sources
. shapes, gradients, shadows, etc. And if it's an ordinary button, then it's better to do without pictures, with a combination of primitive elements.
If you write as simply as possible with your hands, then the button is just a Rectangle, inside of which lies the MouseArea, which can have a negative indent from the edges.