Slider labels clipping in high resolution screens

[MosGeo]

Describe the bug
The labels of the range sliders are clipped when displayed on high resolution screens. You can see in the snapshots that even at 100% scaling in the Surface Book 3 (3240x2160 recommended resolution), it is clipping the labels. The issue is even worse at 200% scaling (which is the recommended scaling for this screen).

To Reproduce
Steps to reproduce the behavior:

1. Create a napari dock widget with a QVBoxLayout
2. Add a QLabeledRangeSlider
3. Add the widget to napari
4. Labels are clipped as in the picture example

A simple example code

self.layout = QVBoxLayout()
histogram_slider = QLabeledRangeSlider()
histogram_slider.setRange(0,255)
histogram_slider.setOrientation(Qt.Orientation.Horizontal)
self.layout.addWidget(histogram_slider)

Expected behavior
Labels are automatically scaled to the screen and are not clipped.

Screenshots
Slider at recommended scaling (200%)

Sliders at not-recommended scaling (100%)

Desktop (please complete the following information):

• OS with version [e.g Win64 21H2]
• Qt Backend [PyQt5]
• Python 3.9.7 64bit

[tlambert03]

Thanks, can you also tell me what version of Qt you're on? I think we've seen this before and found that it's been fixed in newer versions of Qt, but I'm not sure

[tlambert03]

Linking napari/napari#3221 for reference, where I think we saw the same thing on qt 5.12

[MosGeo]

I am using the latest version of PyQt==5.15.4. Looks like the napari issue is the same.

Edit: upon reading through the napari issue, I just wanted to note that I am using pip and that is why napari installed the latest PyQt.

[tlambert03]

Thanks for checking. Just for the sake of completeness, could you give me the output of conda list?

[MosGeo]

I am using pip virtual environment (venv) not conda. The virtual environment:

Package Version

---

aicsimageio 4.2.0
aicspylibczi 3.0.3
aiohttp 3.7.4.post0
alabaster 0.7.12
appdirs 1.4.4
arrow 1.1.1
asciitree 0.3.3
astroid 2.8.0
async-timeout 3.0.1
attrs 21.2.0
Babel 2.9.1
backcall 0.2.0
binaryornot 0.4.4
cachey 0.2.1
certifi 2021.5.30
chardet 4.0.0
charset-normalizer 2.0.6
click 8.0.1
cloudpickle 2.0.0
colorama 0.4.4
cookiecutter 1.7.3
cycler 0.10.0
dask 2021.9.1
debugpy 1.4.3
decorator 5.1.0
dnspython 2.1.0
docstring-parser 0.10
docutils 0.17.1
elementpath 2.3.2
email-validator 1.1.3
entrypoints 0.3
fasteners 0.16.3
freetype-py 2.2.0
fsspec 2021.8.1
HeapDict 1.0.1
hsluv 5.0.2
idna 3.2
imagecodecs 2021.8.26
imageio 2.9.0
imageio-ffmpeg 0.4.5
imagesize 1.2.0
ipykernel 6.4.1
ipython 7.27.0
ipython-genutils 0.2.0
isort 5.9.3
jedi 0.18.0
Jinja2 3.0.1
jinja2-time 0.2.0
jsonschema 3.2.0
jupyter-client 7.0.3
jupyter-core 4.8.1
kiwisolver 1.3.2
lazy-object-proxy 1.6.0
locket 0.2.1
lxml 4.6.3
magicgui 0.2.11
MarkupSafe 2.0.1
matplotlib 3.4.3
matplotlib-inline 0.1.3
mccabe 0.6.1
multidict 5.1.0
napari 0.4.11
napari-aicsimageio 0.4.1
napari-console 0.0.4
napari-plugin-engine 0.2.0
napari-svg 0.1.5
nest-asyncio 1.5.1
networkx 2.6.3
numcodecs 0.9.1
numpy 1.21.2
numpydoc 1.1.0
ome-types 0.2.9
opencv-python 4.5.3.56
packaging 21.0
pandas 1.3.3
parso 0.8.2
partd 1.2.0
pickleshare 0.7.5
Pillow 8.3.2
Pint 0.17
pip 21.2.4
platformdirs 2.3.0
pooch 1.5.1
poyo 0.5.0
prompt-toolkit 3.0.20
psutil 5.8.0
pydantic 1.8.2
Pygments 2.10.0
pylint 2.11.1
PyOpenGL 3.1.5
pyparsing 2.4.7
PyQt5 5.15.4
PyQt5-Qt5 5.15.2
PyQt5-sip 12.9.0
pyrsistent 0.18.0
python-dateutil 2.8.2
python-slugify 5.0.2
pytz 2021.1
PyWavelets 1.1.1
pywin32 301
PyYAML 5.4.1
pyzmq 22.3.0
qtconsole 5.1.1
QtPy 1.11.2
readlif 0.6.2
requests 2.26.0
scikit-image 0.18.3
scipy 1.7.1
setuptools 58.1.0
six 1.16.0
snowballstemmer 2.1.0
Sphinx 4.2.0
sphinxcontrib-applehelp 1.0.2
sphinxcontrib-devhelp 1.0.2
sphinxcontrib-htmlhelp 2.0.0
sphinxcontrib-jsmath 1.0.1
sphinxcontrib-qthelp 1.0.3
sphinxcontrib-serializinghtml 1.1.5
superqt 0.2.4
text-unidecode 1.3
tifffile 2021.8.30
toml 0.10.2
toolz 0.11.1
tornado 6.1
tqdm 4.62.3
traitlets 5.1.0
typing-extensions 3.10.0.2
urllib3 1.26.7
vispy 0.8.1
wcwidth 0.2.5
wheel 0.37.0
wrapt 1.12.1
xarray 0.16.2
xmlschema 1.7.1
yarl 1.6.3
zarr 2.10.0

[MehradN]

I also have a similar problem, the numbers on top of the QLabeledRangeSlider will clip when they get near the edges of the slider