Big problem with QStyle

[TomNow99]

Hi,

Like in a topic - I read QStyle Doc and I don't know, which Param / function I have to use.

I would like to get many information about QComboBox, but ( look at the picture ) not about the red rectangle element, but about green rectangle elements ( so I would like to get information about items in QComboBox's popup ).

My questions:

1. Where I can find a picture with a QWidget and his elements ( like popup, down-arrow, label )?
2. How to know if that enums in QStyle are about red rectangle element or aboute green rectangle elements?
3. How can I get size of indicator in item, which is in QComboBox's popup?

Now I have:

    QStyleOptionComboBox opt;
    initStyleOption( &opt );
    QRect rect( style()->subElementRect( QStyle::SE_CheckBoxIndicator, &opt, this ) );

But I don't know this is a good way. I use CheckBox enum, so is it ok?

4. How to get size of "label" ( I don't know if is it a label ) in item in QCombobox's popup, where there is a item text?

Now I have:

    QStyleOptionComboBox opt;
    initStyleOption(&opt);
    QRect rect(style()->subElementRect(QStyle::SE_CheckBoxContents,&opt,this));

The problem is the same as in second 2 question.

5. Something like question 3. I would like to get size the same but without text margins. Look at the picture:

I would like to get size without red rectangles ( text margins ).

I try find something here too: https://code.woboq.org/qt5/qtbase/src/widgets/styles/qcommonstyle.cpp.html

If you know for example only one answer - please write :) This is very important for me.

[jsulm]

@TomNow99
https://doc.qt.io/qt-5/stylesheet-reference.html
https://doc.qt.io/qt-5/stylesheet-examples.html#customizing-qcombobox

[TomNow99]

@jsulm Thank you, but this is good only for QStyleSheet. I would like the same for QStyle documentation.