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Powerful widgets and type annotations for napari plugin widgets

Project description


License BSD-3 PyPI Python Version tests codecov napari hub

Powerful magicgui widgets and type annotations for general-purpose napari plugin development.

napari-power-widgets makes the full use of type-to-widget mapping strategy of magicgui to provide napari-specific types and value-widgets, which will be very useful to improve UI/UX of your napari plugins with simple codes.

Currently, napari-power-widgets does not provide any reader, writer or widget. It is supposed to be used programmatically.


Some types/widgets and the possible usage are picked up here (→ check all). If you have any neat ideas, please open an issue.

1. BoxSelection

Alias of a four-float tuple for 2D selection. You can set the value by drawing a interaction box in the viewer.

e. g. : image cropper, rectangular labeling etc.

def f(box: BoxSelection):

2. OneOfRectangles

Alias of np.ndarray for one of rectangles in a Shapes layer.

e. g. : image cropper, rectangular labeling etc.

def f(rect: OneOfRectangles):

3. LineData

Alias of np.ndarray for a line data. You can obtain the data by manually drawing a line in the viewer.

e. g. : line profiling, kymograph etc.

def f(line: LineData):

4. OneOfLabels

Alias of boolean np.ndarray for a labeled region. You can choose ones by directly clicking the viewer.

e. g. : image masking, feature measurement etc.

def f(label: OneOfLabels):

5. ZRange

Alias of a tuple of float that represents the limit of the third dimension. You can select the values by moving the dimension slider.

e. g. : movie trimming, partial image projection etc.

def f(zrange: ZRange):

This napari plugin was generated with Cookiecutter using @napari's cookiecutter-napari-plugin template.


You can install napari-power-widgets via pip:

pip install napari-power-widgets

To install latest development version :

pip install git+


Contributions are very welcome. Tests can be run with tox, please ensure the coverage at least stays the same before you submit a pull request.


Distributed under the terms of the BSD-3 license, "napari-power-widgets" is free and open source software


If you encounter any problems, please file an issue along with a detailed description.

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