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magicgui viewer#
Example showing how to access the current viewer from a function widget.
import napari
# annotating a paramater as `napari.Viewer` will automatically provide
# the viewer that the function is embedded in, when the function is added to
# the viewer with add_function_widget.
def my_function(viewer: napari.Viewer):
print(viewer, f"with {len(viewer.layers)} layers")
viewer = napari.Viewer()
# Add our magic function to napari
viewer.window.add_function_widget(my_function)
if __name__ == '__main__':
napari.run()