DeMille Lab Widgets for PyQt5

Small, reusable PyQt5 widgets developed for laboratory control-system interfaces.

The package improves several common Qt interactions, including preventing spin boxes and combo boxes from changing when the mouse wheel is used while the widget does not have focus. It also provides cursor-position-aware numeric stepping, scientific-notation input, convenience layouts, a configured plotting widget, and a table widget with frozen rows and columns.

Installation

Once the first release is published to PyPI:

python -m pip install demille-lab-widgets-pyqt5

Usage

from demille_lab_widgets import NewBox, NewDoubleSpinBox, NewSpinBox

voltage = NewDoubleSpinBox(range=(-10.0, 10.0), decimals=3, suffix=" V")
shots = NewSpinBox(range=(0, 100_000))
controls = NewBox(layout_type="form")
controls.frame.addRow("Voltage", voltage)
controls.frame.addRow("Shots", shots)

The public classes are:

  • NewBox
  • NewComboBox
  • NewSpinBox
  • NewDoubleSpinBox
  • ScientificDoubleSpinBox
  • NewPlot
  • NewScrollArea
  • FlexibleGridLayout
  • NewTableWidget

Behavior

NewSpinBox, NewDoubleSpinBox, and NewComboBox ignore mouse-wheel changes until they have keyboard focus. The numeric spin boxes also change their step size according to the cursor position. Keyboard tracking is disabled so typed values are committed when Enter is pressed or focus is lost.

NewBox exposes its layout as frame and keeps zero margins around it. In form mode the box is drawn without a border; calling setTitle() adds back only the vertical space the title text needs.

Development

Create a virtual environment, then install the package in editable form:

python -m pip install -e ".[test]"
python -m unittest discover -s tests -v
python -m build
python -m twine check dist/*

Release status

The package implementation is maintained independently in this repository and is distributed under the MIT License. Runtime dependencies retain their own licenses; see Third-party notices.

Acknowledgements

The widget collection was originally developed for CeNTREX by Olivier Grasdijk and Jakob Kastelic. Qian Wang subsequently brought it into the SrF control software and developed additional improvements. Shaozhen Yang later adapted it for FrAg, extracted it into this standalone package, coordinated the licensing review, and prepared the public release. See the full project history and contributors.

Project links

Data verified by PyPI on Sep 11, 2026
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Credits

Author: Olivier Grasdijk, Jakob Kastelic, Qian Wang, Shaozhen Yang

GitHub Statistics

Data verified by PyPI on Sep 11, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

MIT
View SPDX License List

Requires

Python >=3.9

Provides Extra

test

Tags

PyQt5 Qt widgets laboratory control-system

Classifiers

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