Function that generates a stylesheet for styling QSpinBox & QDoubleSpinBox

style_QSpinBox.py

import sys
from qtpy.QtWidgets import (
    QApplication,
    QMainWindow,
    QSpinBox,
    QDoubleSpinBox,
    QFrame,
    QGridLayout,
)


"""
menu-down.svg
```
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><title>menu-down</title><path d="M7,10L12,15L17,10H7Z" /></svg>
```

menu-up.svg
```
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><title>menu-up</title><path d="M7,15L12,10L17,15H7Z" /></svg>
```

svg.qrc
```
<!DOCTYPE RCC>
<RCC version="1.0">
    <qresource prefix="/">
        <file>svg/menu-down.svg</file>
        <file>svg/menu-up.svg</file>
    </qresource>
</RCC>
```
"""

###  start of `svg.qrc` ###
from PySide6 import QtCore

qt_resource_data = b"\
\x00\x00\x00{\
<\
svg xmlns=\x22http:\
//www.w3.org/200\
0/svg\x22 viewBox=\x22\
0 0 24 24\x22><titl\
e>menu-down</tit\
le><path d=\x22M7,1\
0L12,15L17,10H7Z\
\x22 /></svg>\
\x00\x00\x00y\
<\
svg xmlns=\x22http:\
//www.w3.org/200\
0/svg\x22 viewBox=\x22\
0 0 24 24\x22><titl\
e>menu-up</title\
><path d=\x22M7,15L\
12,10L17,15H7Z\x22 \
/></svg>\
"

qt_resource_name = b"\
\x00\x03\
\x00\x00z\xc7\
\x00s\
\x00v\x00g\
\x00\x0d\
\x01j\x5cg\
\x00m\
\x00e\x00n\x00u\x00-\x00d\x00o\x00w\x00n\x00.\x00s\x00v\x00g\
\x00\x0b\
\x04$\xd1\xc7\
\x00m\
\x00e\x00n\x00u\x00-\x00u\x00p\x00.\x00s\x00v\x00g\
"

qt_resource_struct = b"\
\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x01\
\x00\x00\x00\x00\x00\x00\x00\x00\
\x00\x00\x00\x00\x00\x02\x00\x00\x00\x02\x00\x00\x00\x02\
\x00\x00\x00\x00\x00\x00\x00\x00\
\x00\x00\x00\x0c\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\
\x00\x00\x01\x8et\xfe/\xbb\
\x00\x00\x00,\x00\x00\x00\x00\x00\x01\x00\x00\x00\x7f\
\x00\x00\x01\x8ey?+\xf7\
"


def qInitResources():
    QtCore.qRegisterResourceData(
        0x03, qt_resource_struct, qt_resource_name, qt_resource_data
    )


def qCleanupResources():
    QtCore.qUnregisterResourceData(
        0x03, qt_resource_struct, qt_resource_name, qt_resource_data
    )


qInitResources()

###  end of `svg.qrc` ###


def style_QSpinBox(
    border_width: str = "1px",
    border_radius: str = "4px",
    horizontal_padding="8px",
    vertical_padding: str = "2px",
    up_arrow_image=":/svg/menu-up.svg",
    down_arrow_image=":/svg/menu-down.svg",
    border_color: str = "#b0b0b0",
    background_color: str = "#fdfdfd",
    color: str = "#404040",
    placeholder_color: str = "#808080",
    selection_background_color: str = "#404040",
    selection_color: str = "#fdfdfd",
    hover_border_color: str = "#404040",
    disabled_border_color: str = "#b0b0b0",
    disabled_background_color: str = "#e0e0e0",
    disabled_color: str = "#808080",
):

    qss = f"""
        QSpinBox, QDoubleSpinBox {{
            border-width: {border_width};
            border-style: solid;
            border-color: {border_color};
            border-radius: {border_radius};
            background-color: {background_color};
            color: {color};
            padding: {vertical_padding} {horizontal_padding};
            placeholder-text-color: {placeholder_color};
            selection-background-color: {selection_background_color};
            selection-color: {selection_color};
        }}
        QSpinBox::hover, QDoubleSpinBox::hover {{
            border-color: {hover_border_color};
        }}
        QSpinBox::disabled, QDoubleSpinBox::disabled {{
            border-color: {disabled_border_color};
            background-color: {disabled_background_color};
            color: {disabled_color};
        }}
        QSpinBox::up-arrow, QDoubleSpinBox::up-arrow {{
            image: url('{up_arrow_image}');
        }}
        QSpinBox::down-arrow, QDoubleSpinBox::down-arrow {{
            image: url('{down_arrow_image}');
        }}
        QSpinBox::up-button, QDoubleSpinBox::up-button, 
        QSpinBox::down-button, QDoubleSpinBox::down-button {{
            border-style: solid;
            border-left-width: {border_width};
            border-left-color: {border_color};
            background-color: {background_color};
            color: {color};
        }}
        QSpinBox::up-button:hover, QDoubleSpinBox::up-button:hover, 
        QSpinBox::down-button:hover, QDoubleSpinBox::down-button:hover {{
            border-color: {hover_border_color};
        }}
        QSpinBox::up-button, QDoubleSpinBox::up-button {{
            border-top-right-radius: {border_radius};
        }}
        QSpinBox::down-button, QDoubleSpinBox::down-button {{
            border-bottom-right-radius: {border_radius};
        }}
        """
    return qss


class Frame(QFrame):
    def __init__(self, parent=None):
        super().__init__(parent)
        layout = QGridLayout()
        layout.setSizeConstraint(QGridLayout.SizeConstraint.SetFixedSize)
        w = QSpinBox()
        layout.addWidget(w, 0, 0)
        w = QSpinBox()
        w.setDisabled(True)
        layout.addWidget(w, 0, 1)
        w = QDoubleSpinBox()
        layout.addWidget(w, 1, 0)
        w = QDoubleSpinBox()
        w.setDisabled(True)
        layout.addWidget(w, 1, 1)
        self.setLayout(layout)


def main():
    app = QApplication(sys.argv)
    app.setStyleSheet(style_QSpinBox())
    w = QMainWindow()
    w.setMinimumSize(200, 100)
    w.setCentralWidget(Frame(w))
    w.show()
    sys.exit(app.exec())