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"""
Display many points layers
"""

import numpy as np
import napari
from time import time

data = []
for i in range(50):

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import numpy as np

from ..utils.events import EmitterGroup


class Extent:
    """Extent object holding minimum and maximum values of data.

    Parameters
    ----------

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class TransformChain(ListModel, Transform):
    def __init__(self, transforms=[]):
        super().__init__(
            basetype=Transform,
            iterable=transforms,
            lookup={str: lambda q, e: q == e.name},
        )

    def __call__(self, coords):
        return tz.pipe(coords, *self)

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def generate_3D_path_meshes_2D(path, p=(0, 0, 1)):
    """Generates list of mesh vertices and triangles from a path

    Parameters
    ----------
    path : (N, D) array
        Vertices specifying the path where D is 2 or 3.
    p : 3-tuple, optional
        orthogonal vector for segment calculation in 3D.

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def _get_viewer_thumbnail(self):
    """Creat an overall thumbnail based on the layer thumbnails."""
    thumbnail = np.zeros(layers.Layer._thumbnail_shape, dtype=np.uint8)

    for layer in self.layers[::-1]:
        if layer.blending == 'translucent':
            f_dest = thumbnail[..., 3][..., None] / 255
            f_source = 1 - layer.thumbnail[..., 3][..., None] / 255
        elif layer.blending == 'additive':
            f_dest = thumbnail[..., 3][..., None] / 255

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"""
 Interactive test for range slider.
"""

# starts the QT event loop
from napari._qt.range_slider.range_slider import QVRangeSlider
from napari.util import app_context

with app_context():

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from skimage import data
from skimage.color import rgb2gray

from napari import Viewer
from napari.util import app_context


# THIS WILL NOT WORK UNTIL THERE IS SEPARATION BETWEEN MODEL AND VIEW!

def test_dims_and_ranges():

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# This is in interactive test

from time import sleep

import threading

from napari.components import Dims
from napari.components._dims._constants import DimsMode
from napari.components._dims.view import QtDims
from napari.util import app_context