import functools
import io
import operator
from unittest import mock

from matplotlib.backend_bases import MouseEvent
import matplotlib.colors as mcolors
import matplotlib.widgets as widgets
import matplotlib.pyplot as plt
from matplotlib.testing.decorators import check_figures_equal, image_comparison
from matplotlib.testing.widgets import (click_and_drag, do_event, get_ax,
                                        mock_event, noop)

import numpy as np
from numpy.testing import assert_allclose

import pytest


@pytest.fixture
def ax():
    return get_ax()


def test_save_blitted_widget_as_pdf():
    from matplotlib.widgets import CheckButtons, RadioButtons
    from matplotlib.cbook import _get_running_interactive_framework
    if _get_running_interactive_framework() not in ['headless', None]:
        pytest.xfail("Callback exceptions are not raised otherwise.")

    fig, ax = plt.subplots(
        nrows=2, ncols=2, figsize=(5, 2), width_ratios=[1, 2]
    )
    default_rb = RadioButtons(ax[0, 0], ['Apples', 'Oranges'])
    styled_rb = RadioButtons(
        ax[0, 1], ['Apples', 'Oranges'],
        label_props={'color': ['red', 'orange'],
                     'fontsize': [16, 20]},
        radio_props={'edgecolor': ['red', 'orange'],
                     'facecolor': ['mistyrose', 'peachpuff']}
    )

    default_cb = CheckButtons(ax[1, 0], ['Apples', 'Oranges'],
                              actives=[True, True])
    styled_cb = CheckButtons(
        ax[1, 1], ['Apples', 'Oranges'],
        actives=[True, True],
        label_props={'color': ['red', 'orange'],
                     'fontsize': [16, 20]},
        frame_props={'edgecolor': ['red', 'orange'],
                     'facecolor': ['mistyrose', 'peachpuff']},
        check_props={'color': ['darkred', 'darkorange']}
    )

    ax[0, 0].set_title('Default')
    ax[0, 1].set_title('Stylized')
    # force an Agg render
    fig.canvas.draw()
    # force a pdf save
    with io.BytesIO() as result_after:
        fig.savefig(result_after, format='pdf')


@pytest.mark.parametrize('kwargs', [
    dict(),
    dict(useblit=True, button=1),
    dict(minspanx=10, minspany=10, spancoords='pixels'),
    dict(props=dict(fill=True)),
])
def test_rectangle_selector(ax, kwargs):
    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.RectangleSelector(ax, onselect=onselect, **kwargs)
    do_event(tool, 'press', xdata=100, ydata=100, button=1)
    do_event(tool, 'onmove', xdata=199, ydata=199, button=1)

    # purposely drag outside of axis for release
    do_event(tool, 'release', xdata=250, ydata=250, button=1)

    if kwargs.get('drawtype', None) not in ['line', 'none']:
        assert_allclose(tool.geometry,
                        [[100., 100, 199, 199, 100],
                         [100, 199, 199, 100, 100]],
                        err_msg=tool.geometry)

    onselect.assert_called_once()
    (epress, erelease), kwargs = onselect.call_args
    assert epress.xdata == 100
    assert epress.ydata == 100
    assert erelease.xdata == 199
    assert erelease.ydata == 199
    assert kwargs == {}


@pytest.mark.parametrize('spancoords', ['data', 'pixels'])
@pytest.mark.parametrize('minspanx, x1', [[0, 10], [1, 10.5], [1, 11]])
@pytest.mark.parametrize('minspany, y1', [[0, 10], [1, 10.5], [1, 11]])
def test_rectangle_minspan(ax, spancoords, minspanx, x1, minspany, y1):

    onselect = mock.Mock(spec=noop, return_value=None)

    x0, y0 = (10, 10)
    if spancoords == 'pixels':
        minspanx, minspany = (ax.transData.transform((x1, y1)) -
                              ax.transData.transform((x0, y0)))

    tool = widgets.RectangleSelector(ax, onselect=onselect, interactive=True,
                                     spancoords=spancoords,
                                     minspanx=minspanx, minspany=minspany)
    # Too small to create a selector
    click_and_drag(tool, start=(x0, x1), end=(y0, y1))
    assert not tool._selection_completed
    onselect.assert_not_called()

    click_and_drag(tool, start=(20, 20), end=(30, 30))
    assert tool._selection_completed
    onselect.assert_called_once()

    # Too small to create a selector. Should clear existing selector, and
    # trigger onselect because there was a preexisting selector
    onselect.reset_mock()
    click_and_drag(tool, start=(x0, y0), end=(x1, y1))
    assert not tool._selection_completed
    onselect.assert_called_once()
    (epress, erelease), kwargs = onselect.call_args
    assert epress.xdata == x0
    assert epress.ydata == y0
    assert erelease.xdata == x1
    assert erelease.ydata == y1
    assert kwargs == {}


@pytest.mark.parametrize('drag_from_anywhere, new_center',
                         [[True, (60, 75)],
                          [False, (30, 20)]])
def test_rectangle_drag(ax, drag_from_anywhere, new_center):
    tool = widgets.RectangleSelector(ax, interactive=True,
                                     drag_from_anywhere=drag_from_anywhere)
    # Create rectangle
    click_and_drag(tool, start=(0, 10), end=(100, 120))
    assert tool.center == (50, 65)
    # Drag inside rectangle, but away from centre handle
    #
    # If drag_from_anywhere == True, this will move the rectangle by (10, 10),
    # giving it a new center of (60, 75)
    #
    # If drag_from_anywhere == False, this will create a new rectangle with
    # center (30, 20)
    click_and_drag(tool, start=(25, 15), end=(35, 25))
    assert tool.center == new_center
    # Check that in both cases, dragging outside the rectangle draws a new
    # rectangle
    click_and_drag(tool, start=(175, 185), end=(185, 195))
    assert tool.center == (180, 190)


def test_rectangle_selector_set_props_handle_props(ax):
    tool = widgets.RectangleSelector(ax, interactive=True,
                                     props=dict(facecolor='b', alpha=0.2),
                                     handle_props=dict(alpha=0.5))
    # Create rectangle
    click_and_drag(tool, start=(0, 10), end=(100, 120))

    artist = tool._selection_artist
    assert artist.get_facecolor() == mcolors.to_rgba('b', alpha=0.2)
    tool.set_props(facecolor='r', alpha=0.3)
    assert artist.get_facecolor() == mcolors.to_rgba('r', alpha=0.3)

    for artist in tool._handles_artists:
        assert artist.get_markeredgecolor() == 'black'
        assert artist.get_alpha() == 0.5
    tool.set_handle_props(markeredgecolor='r', alpha=0.3)
    for artist in tool._handles_artists:
        assert artist.get_markeredgecolor() == 'r'
        assert artist.get_alpha() == 0.3


def test_rectangle_resize(ax):
    tool = widgets.RectangleSelector(ax, interactive=True)
    # Create rectangle
    click_and_drag(tool, start=(0, 10), end=(100, 120))
    assert tool.extents == (0.0, 100.0, 10.0, 120.0)

    # resize NE handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[3]
    xdata_new, ydata_new = xdata + 10, ydata + 5
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert tool.extents == (extents[0], xdata_new, extents[2], ydata_new)

    # resize E handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdata_new, ydata_new = xdata + 10, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert tool.extents == (extents[0], xdata_new, extents[2], extents[3])

    # resize W handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdata_new, ydata_new = xdata + 15, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert tool.extents == (xdata_new, extents[1], extents[2], extents[3])

    # resize SW handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2]
    xdata_new, ydata_new = xdata + 20, ydata + 25
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert tool.extents == (xdata_new, extents[1], ydata_new, extents[3])


def test_rectangle_add_state(ax):
    tool = widgets.RectangleSelector(ax, interactive=True)
    # Create rectangle
    click_and_drag(tool, start=(70, 65), end=(125, 130))

    with pytest.raises(ValueError):
        tool.add_state('unsupported_state')

    with pytest.raises(ValueError):
        tool.add_state('clear')
    tool.add_state('move')
    tool.add_state('square')
    tool.add_state('center')


@pytest.mark.parametrize('add_state', [True, False])
def test_rectangle_resize_center(ax, add_state):
    tool = widgets.RectangleSelector(ax, interactive=True)
    # Create rectangle
    click_and_drag(tool, start=(70, 65), end=(125, 130))
    assert tool.extents == (70.0, 125.0, 65.0, 130.0)

    if add_state:
        tool.add_state('center')
        use_key = None
    else:
        use_key = 'control'

    # resize NE handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[3]
    xdiff, ydiff = 10, 5
    xdata_new, ydata_new = xdata + xdiff, ydata + ydiff
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0] - xdiff, xdata_new,
                            extents[2] - ydiff, ydata_new)

    # resize E handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = 10
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0] - xdiff, xdata_new,
                            extents[2], extents[3])

    # resize E handle negative diff
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = -20
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0] - xdiff, xdata_new,
                            extents[2], extents[3])

    # resize W handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = 15
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (xdata_new, extents[1] - xdiff,
                            extents[2], extents[3])

    # resize W handle negative diff
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = -25
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (xdata_new, extents[1] - xdiff,
                            extents[2], extents[3])

    # resize SW handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2]
    xdiff, ydiff = 20, 25
    xdata_new, ydata_new = xdata + xdiff, ydata + ydiff
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (xdata_new, extents[1] - xdiff,
                            ydata_new, extents[3] - ydiff)


@pytest.mark.parametrize('add_state', [True, False])
def test_rectangle_resize_square(ax, add_state):
    tool = widgets.RectangleSelector(ax, interactive=True)
    # Create rectangle
    click_and_drag(tool, start=(70, 65), end=(120, 115))
    assert tool.extents == (70.0, 120.0, 65.0, 115.0)

    if add_state:
        tool.add_state('square')
        use_key = None
    else:
        use_key = 'shift'

    # resize NE handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[3]
    xdiff, ydiff = 10, 5
    xdata_new, ydata_new = xdata + xdiff, ydata + ydiff
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0], xdata_new,
                            extents[2], extents[3] + xdiff)

    # resize E handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = 10
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0], xdata_new,
                            extents[2], extents[3] + xdiff)

    # resize E handle negative diff
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = -20
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0], xdata_new,
                            extents[2], extents[3] + xdiff)

    # resize W handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = 15
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (xdata_new, extents[1],
                            extents[2], extents[3] - xdiff)

    # resize W handle negative diff
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = -25
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (xdata_new, extents[1],
                            extents[2], extents[3] - xdiff)

    # resize SW handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2]
    xdiff, ydiff = 20, 25
    xdata_new, ydata_new = xdata + xdiff, ydata + ydiff
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new),
                   key=use_key)
    assert tool.extents == (extents[0] + ydiff, extents[1],
                            ydata_new, extents[3])


def test_rectangle_resize_square_center(ax):
    tool = widgets.RectangleSelector(ax, interactive=True)
    # Create rectangle
    click_and_drag(tool, start=(70, 65), end=(120, 115))
    tool.add_state('square')
    tool.add_state('center')
    assert_allclose(tool.extents, (70.0, 120.0, 65.0, 115.0))

    # resize NE handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[3]
    xdiff, ydiff = 10, 5
    xdata_new, ydata_new = xdata + xdiff, ydata + ydiff
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert_allclose(tool.extents, (extents[0] - xdiff, xdata_new,
                                   extents[2] - xdiff, extents[3] + xdiff))

    # resize E handle
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = 10
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert_allclose(tool.extents, (extents[0] - xdiff, xdata_new,
                                   extents[2] - xdiff, extents[3] + xdiff))

    # resize E handle negative diff
    extents = tool.extents
    xdata, ydata = extents[1], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = -20
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert_allclose(tool.extents, (extents[0] - xdiff, xdata_new,
                                   extents[2] - xdiff, extents[3] + xdiff))

    # resize W handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = 5
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert_allclose(tool.extents, (xdata_new, extents[1] - xdiff,
                                   extents[2] + xdiff, extents[3] - xdiff))

    # resize W handle negative diff
    extents = tool.extents
    xdata, ydata = extents[0], extents[2] + (extents[3] - extents[2]) / 2
    xdiff = -25
    xdata_new, ydata_new = xdata + xdiff, ydata
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert_allclose(tool.extents, (xdata_new, extents[1] - xdiff,
                                   extents[2] + xdiff, extents[3] - xdiff))

    # resize SW handle
    extents = tool.extents
    xdata, ydata = extents[0], extents[2]
    xdiff, ydiff = 20, 25
    xdata_new, ydata_new = xdata + xdiff, ydata + ydiff
    click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
    assert_allclose(tool.extents, (extents[0] + ydiff, extents[1] - ydiff,
                                   ydata_new, extents[3] - ydiff))


@pytest.mark.parametrize('selector_class',
                         [widgets.RectangleSelector, widgets.EllipseSelector])
def test_rectangle_rotate(ax, selector_class):
    tool = selector_class(ax, interactive=True)
    # Draw rectangle
    click_and_drag(tool, start=(100, 100), end=(130, 140))
    assert tool.extents == (100, 130, 100, 140)
    assert len(tool._state) == 0

    # Rotate anticlockwise using top-right corner
    do_event(tool, 'on_key_press', key='r')
    assert tool._state == {'rotate'}
    assert len(tool._state) == 1
    click_and_drag(tool, start=(130, 140), end=(120, 145))
    do_event(tool, 'on_key_press', key='r')
    assert len(tool._state) == 0
    # Extents shouldn't change (as shape of rectangle hasn't changed)
    assert tool.extents == (100, 130, 100, 140)
    assert_allclose(tool.rotation, 25.56, atol=0.01)
    tool.rotation = 45
    assert tool.rotation == 45
    # Corners should move
    assert_allclose(tool.corners,
                    np.array([[118.53, 139.75, 111.46, 90.25],
                              [95.25, 116.46, 144.75, 123.54]]), atol=0.01)

    # Scale using top-right corner
    click_and_drag(tool, start=(110, 145), end=(110, 160))
    assert_allclose(tool.extents, (100, 139.75, 100, 151.82), atol=0.01)

    if selector_class == widgets.RectangleSelector:
        with pytest.raises(ValueError):
            tool._selection_artist.rotation_point = 'unvalid_value'


def test_rectangle_add_remove_set(ax):
    tool = widgets.RectangleSelector(ax, interactive=True)
    # Draw rectangle
    click_and_drag(tool, start=(100, 100), end=(130, 140))
    assert tool.extents == (100, 130, 100, 140)
    assert len(tool._state) == 0
    for state in ['rotate', 'square', 'center']:
        tool.add_state(state)
        assert len(tool._state) == 1
        tool.remove_state(state)
        assert len(tool._state) == 0


@pytest.mark.parametrize('use_data_coordinates', [False, True])
def test_rectangle_resize_square_center_aspect(ax, use_data_coordinates):
    ax.set_aspect(0.8)

    tool = widgets.RectangleSelector(ax, interactive=True,
                                     use_data_coordinates=use_data_coordinates)
    # Create rectangle
    click_and_drag(tool, start=(70, 65), end=(120, 115))
    assert tool.extents == (70.0, 120.0, 65.0, 115.0)
    tool.add_state('square')
    tool.add_state('center')

    if use_data_coordinates:
        # resize E handle
        extents = tool.extents
        xdata, ydata, width = extents[1], extents[3], extents[1] - extents[0]
        xdiff, ycenter = 10,  extents[2] + (extents[3] - extents[2]) / 2
        xdata_new, ydata_new = xdata + xdiff, ydata
        ychange = width / 2 + xdiff
        click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
        assert_allclose(tool.extents, [extents[0] - xdiff, xdata_new,
                                       ycenter - ychange, ycenter + ychange])
    else:
        # resize E handle
        extents = tool.extents
        xdata, ydata = extents[1], extents[3]
        xdiff = 10
        xdata_new, ydata_new = xdata + xdiff, ydata
        ychange = xdiff * 1 / tool._aspect_ratio_correction
        click_and_drag(tool, start=(xdata, ydata), end=(xdata_new, ydata_new))
        assert_allclose(tool.extents, [extents[0] - xdiff, xdata_new,
                                       46.25, 133.75])


def test_ellipse(ax):
    """For ellipse, test out the key modifiers"""
    tool = widgets.EllipseSelector(ax, grab_range=10, interactive=True)
    tool.extents = (100, 150, 100, 150)

    # drag the rectangle
    click_and_drag(tool, start=(125, 125), end=(145, 145))
    assert tool.extents == (120, 170, 120, 170)

    # create from center
    click_and_drag(tool, start=(100, 100), end=(125, 125), key='control')
    assert tool.extents == (75, 125, 75, 125)

    # create a square
    click_and_drag(tool, start=(10, 10), end=(35, 30), key='shift')
    extents = [int(e) for e in tool.extents]
    assert extents == [10, 35, 10, 35]

    # create a square from center
    click_and_drag(tool, start=(100, 100), end=(125, 130), key='ctrl+shift')
    extents = [int(e) for e in tool.extents]
    assert extents == [70, 130, 70, 130]

    assert tool.geometry.shape == (2, 73)
    assert_allclose(tool.geometry[:, 0], [70., 100])


def test_rectangle_handles(ax):
    tool = widgets.RectangleSelector(ax, grab_range=10, interactive=True,
                                     handle_props={'markerfacecolor': 'r',
                                                   'markeredgecolor': 'b'})
    tool.extents = (100, 150, 100, 150)

    assert_allclose(tool.corners, ((100, 150, 150, 100), (100, 100, 150, 150)))
    assert tool.extents == (100, 150, 100, 150)
    assert_allclose(tool.edge_centers,
                    ((100, 125.0, 150, 125.0), (125.0, 100, 125.0, 150)))
    assert tool.extents == (100, 150, 100, 150)

    # grab a corner and move it
    click_and_drag(tool, start=(100, 100), end=(120, 120))
    assert tool.extents == (120, 150, 120, 150)

    # grab the center and move it
    click_and_drag(tool, start=(132, 132), end=(120, 120))
    assert tool.extents == (108, 138, 108, 138)

    # create a new rectangle
    click_and_drag(tool, start=(10, 10), end=(100, 100))
    assert tool.extents == (10, 100, 10, 100)

    # Check that marker_props worked.
    assert mcolors.same_color(
        tool._corner_handles.artists[0].get_markerfacecolor(), 'r')
    assert mcolors.same_color(
        tool._corner_handles.artists[0].get_markeredgecolor(), 'b')


@pytest.mark.parametrize('interactive', [True, False])
def test_rectangle_selector_onselect(ax, interactive):
    # check when press and release events take place at the same position
    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.RectangleSelector(ax, onselect=onselect, interactive=interactive)
    # move outside of axis
    click_and_drag(tool, start=(100, 110), end=(150, 120))

    onselect.assert_called_once()
    assert tool.extents == (100.0, 150.0, 110.0, 120.0)

    onselect.reset_mock()
    click_and_drag(tool, start=(10, 100), end=(10, 100))
    onselect.assert_called_once()


@pytest.mark.parametrize('ignore_event_outside', [True, False])
def test_rectangle_selector_ignore_outside(ax, ignore_event_outside):
    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.RectangleSelector(ax, onselect=onselect,
                                     ignore_event_outside=ignore_event_outside)
    click_and_drag(tool, start=(100, 110), end=(150, 120))
    onselect.assert_called_once()
    assert tool.extents == (100.0, 150.0, 110.0, 120.0)

    onselect.reset_mock()
    # Trigger event outside of span
    click_and_drag(tool, start=(150, 150), end=(160, 160))
    if ignore_event_outside:
        # event have been ignored and span haven't changed.
        onselect.assert_not_called()
        assert tool.extents == (100.0, 150.0, 110.0, 120.0)
    else:
        # A new shape is created
        onselect.assert_called_once()
        assert tool.extents == (150.0, 160.0, 150.0, 160.0)


@pytest.mark.parametrize('orientation, onmove_callback, kwargs', [
    ('horizontal', False, dict(minspan=10, useblit=True)),
    ('vertical', True, dict(button=1)),
    ('horizontal', False, dict(props=dict(fill=True))),
    ('horizontal', False, dict(interactive=True)),
])
def test_span_selector(ax, orientation, onmove_callback, kwargs):
    onselect = mock.Mock(spec=noop, return_value=None)
    onmove = mock.Mock(spec=noop, return_value=None)
    if onmove_callback:
        kwargs['onmove_callback'] = onmove

    # While at it, also test that span selectors work in the presence of twin axes on
    # top of the axes that contain the selector.  Note that we need to unforce the axes
    # aspect here, otherwise the twin axes forces the original axes' limits (to respect
    # aspect=1) which makes some of the values below go out of bounds.
    ax.set_aspect("auto")
    tax = ax.twinx()

    tool = widgets.SpanSelector(ax, onselect, orientation, **kwargs)
    do_event(tool, 'press', xdata=100, ydata=100, button=1)
    # move outside of axis
    do_event(tool, 'onmove', xdata=199, ydata=199, button=1)
    do_event(tool, 'release', xdata=250, ydata=250, button=1)

    onselect.assert_called_once_with(100, 199)
    if onmove_callback:
        onmove.assert_called_once_with(100, 199)


@pytest.mark.parametrize('interactive', [True, False])
def test_span_selector_onselect(ax, interactive):
    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.SpanSelector(ax, onselect, 'horizontal',
                                interactive=interactive)
    # move outside of axis
    click_and_drag(tool, start=(100, 100), end=(150, 100))
    onselect.assert_called_once()
    assert tool.extents == (100, 150)

    onselect.reset_mock()
    click_and_drag(tool, start=(10, 100), end=(10, 100))
    onselect.assert_called_once()


@pytest.mark.parametrize('ignore_event_outside', [True, False])
def test_span_selector_ignore_outside(ax, ignore_event_outside):
    onselect = mock.Mock(spec=noop, return_value=None)
    onmove = mock.Mock(spec=noop, return_value=None)

    tool = widgets.SpanSelector(ax, onselect, 'horizontal',
                                onmove_callback=onmove,
                                ignore_event_outside=ignore_event_outside)
    click_and_drag(tool, start=(100, 100), end=(125, 125))
    onselect.assert_called_once()
    onmove.assert_called_once()
    assert tool.extents == (100, 125)

    onselect.reset_mock()
    onmove.reset_mock()
    # Trigger event outside of span
    click_and_drag(tool, start=(150, 150), end=(160, 160))
    if ignore_event_outside:
        # event have been ignored and span haven't changed.
        onselect.assert_not_called()
        onmove.assert_not_called()
        assert tool.extents == (100, 125)
    else:
        # A new shape is created
        onselect.assert_called_once()
        onmove.assert_called_once()
        assert tool.extents == (150, 160)


@pytest.mark.parametrize('drag_from_anywhere', [True, False])
def test_span_selector_drag(ax, drag_from_anywhere):
    # Create span
    tool = widgets.SpanSelector(ax, onselect=noop, direction='horizontal',
                                interactive=True,
                                drag_from_anywhere=drag_from_anywhere)
    click_and_drag(tool, start=(10, 10), end=(100, 120))
    assert tool.extents == (10, 100)
    # Drag inside span
    #
    # If drag_from_anywhere == True, this will move the span by 10,
    # giving new value extents = 20, 110
    #
    # If drag_from_anywhere == False, this will create a new span with
    # value extents = 25, 35
    click_and_drag(tool, start=(25, 15), end=(35, 25))
    if drag_from_anywhere:
        assert tool.extents == (20, 110)
    else:
        assert tool.extents == (25, 35)

    # Check that in both cases, dragging outside the span draws a new span
    click_and_drag(tool, start=(175, 185), end=(185, 195))
    assert tool.extents == (175, 185)


def test_span_selector_direction(ax):
    tool = widgets.SpanSelector(ax, onselect=noop, direction='horizontal',
                                interactive=True)
    assert tool.direction == 'horizontal'
    assert tool._edge_handles.direction == 'horizontal'

    with pytest.raises(ValueError):
        tool = widgets.SpanSelector(ax, onselect=noop,
                                    direction='invalid_direction')

    tool.direction = 'vertical'
    assert tool.direction == 'vertical'
    assert tool._edge_handles.direction == 'vertical'

    with pytest.raises(ValueError):
        tool.direction = 'invalid_string'


def test_span_selector_set_props_handle_props(ax):
    tool = widgets.SpanSelector(ax, onselect=noop, direction='horizontal',
                                interactive=True,
                                props=dict(facecolor='b', alpha=0.2),
                                handle_props=dict(alpha=0.5))
    # Create rectangle
    click_and_drag(tool, start=(0, 10), end=(100, 120))

    artist = tool._selection_artist
    assert artist.get_facecolor() == mcolors.to_rgba('b', alpha=0.2)
    tool.set_props(facecolor='r', alpha=0.3)
    assert artist.get_facecolor() == mcolors.to_rgba('r', alpha=0.3)

    for artist in tool._handles_artists:
        assert artist.get_color() == 'b'
        assert artist.get_alpha() == 0.5
    tool.set_handle_props(color='r', alpha=0.3)
    for artist in tool._handles_artists:
        assert artist.get_color() == 'r'
        assert artist.get_alpha() == 0.3


@pytest.mark.parametrize('selector', ['span', 'rectangle'])
def test_selector_clear(ax, selector):
    kwargs = dict(ax=ax, interactive=True)
    if selector == 'span':
        Selector = widgets.SpanSelector
        kwargs['direction'] = 'horizontal'
        kwargs['onselect'] = noop
    else:
        Selector = widgets.RectangleSelector

    tool = Selector(**kwargs)
    click_and_drag(tool, start=(10, 10), end=(100, 120))

    # press-release event outside the selector to clear the selector
    click_and_drag(tool, start=(130, 130), end=(130, 130))
    assert not tool._selection_completed

    kwargs['ignore_event_outside'] = True
    tool = Selector(**kwargs)
    assert tool.ignore_event_outside
    click_and_drag(tool, start=(10, 10), end=(100, 120))

    # press-release event outside the selector ignored
    click_and_drag(tool, start=(130, 130), end=(130, 130))
    assert tool._selection_completed

    do_event(tool, 'on_key_press', key='escape')
    assert not tool._selection_completed


@pytest.mark.parametrize('selector', ['span', 'rectangle'])
def test_selector_clear_method(ax, selector):
    if selector == 'span':
        tool = widgets.SpanSelector(ax, onselect=noop, direction='horizontal',
                                    interactive=True,
                                    ignore_event_outside=True)
    else:
        tool = widgets.RectangleSelector(ax, interactive=True)
    click_and_drag(tool, start=(10, 10), end=(100, 120))
    assert tool._selection_completed
    assert tool.get_visible()
    if selector == 'span':
        assert tool.extents == (10, 100)

    tool.clear()
    assert not tool._selection_completed
    assert not tool.get_visible()

    # Do another cycle of events to make sure we can
    click_and_drag(tool, start=(10, 10), end=(50, 120))
    assert tool._selection_completed
    assert tool.get_visible()
    if selector == 'span':
        assert tool.extents == (10, 50)


def test_span_selector_add_state(ax):
    tool = widgets.SpanSelector(ax, noop, 'horizontal',
                                interactive=True)

    with pytest.raises(ValueError):
        tool.add_state('unsupported_state')
    with pytest.raises(ValueError):
        tool.add_state('center')
    with pytest.raises(ValueError):
        tool.add_state('square')

    tool.add_state('move')


def test_tool_line_handle(ax):
    positions = [20, 30, 50]
    tool_line_handle = widgets.ToolLineHandles(ax, positions, 'horizontal',
                                               useblit=False)

    for artist in tool_line_handle.artists:
        assert not artist.get_animated()
        assert not artist.get_visible()

    tool_line_handle.set_visible(True)
    tool_line_handle.set_animated(True)

    for artist in tool_line_handle.artists:
        assert artist.get_animated()
        assert artist.get_visible()

    assert tool_line_handle.positions == positions


@pytest.mark.parametrize('direction', ("horizontal", "vertical"))
def test_span_selector_bound(direction):
    fig, ax = plt.subplots(1, 1)
    ax.plot([10, 20], [10, 30])
    fig.canvas.draw()
    x_bound = ax.get_xbound()
    y_bound = ax.get_ybound()

    tool = widgets.SpanSelector(ax, print, direction, interactive=True)
    assert ax.get_xbound() == x_bound
    assert ax.get_ybound() == y_bound

    bound = x_bound if direction == 'horizontal' else y_bound
    assert tool._edge_handles.positions == list(bound)

    press_data = (10.5, 11.5)
    move_data = (11, 13)  # Updating selector is done in onmove
    release_data = move_data
    click_and_drag(tool, start=press_data, end=move_data)

    assert ax.get_xbound() == x_bound
    assert ax.get_ybound() == y_bound

    index = 0 if direction == 'horizontal' else 1
    handle_positions = [press_data[index], release_data[index]]
    assert tool._edge_handles.positions == handle_positions


@pytest.mark.backend('QtAgg', skip_on_importerror=True)
def test_span_selector_animated_artists_callback():
    """Check that the animated artists changed in callbacks are updated."""
    x = np.linspace(0, 2 * np.pi, 100)
    values = np.sin(x)

    fig, ax = plt.subplots()
    ln, = ax.plot(x, values, animated=True)
    ln2, = ax.plot([], animated=True)

    # spin the event loop to let the backend process any pending operations
    # before drawing artists
    # See blitting tutorial
    plt.pause(0.1)
    ax.draw_artist(ln)
    fig.canvas.blit(fig.bbox)

    def mean(vmin, vmax):
        # Return mean of values in x between *vmin* and *vmax*
        indmin, indmax = np.searchsorted(x, (vmin, vmax))
        v = values[indmin:indmax].mean()
        ln2.set_data(x, np.full_like(x, v))

    span = widgets.SpanSelector(ax, mean, direction='horizontal',
                                onmove_callback=mean,
                                interactive=True,
                                drag_from_anywhere=True,
                                useblit=True)

    # Add span selector and check that the line is draw after it was updated
    # by the callback
    press_data = [1, 2]
    move_data = [2, 2]
    do_event(span, 'press', xdata=press_data[0], ydata=press_data[1], button=1)
    do_event(span, 'onmove', xdata=move_data[0], ydata=move_data[1], button=1)
    assert span._get_animated_artists() == (ln, ln2)
    assert ln.stale is False
    assert ln2.stale
    assert_allclose(ln2.get_ydata(), 0.9547335049088455)
    span.update()
    assert ln2.stale is False

    # Change span selector and check that the line is drawn/updated after its
    # value was updated by the callback
    press_data = [4, 0]
    move_data = [5, 2]
    release_data = [5, 2]
    do_event(span, 'press', xdata=press_data[0], ydata=press_data[1], button=1)
    do_event(span, 'onmove', xdata=move_data[0], ydata=move_data[1], button=1)
    assert ln.stale is False
    assert ln2.stale
    assert_allclose(ln2.get_ydata(), -0.9424150707548072)
    do_event(span, 'release', xdata=release_data[0],
             ydata=release_data[1], button=1)
    assert ln2.stale is False


def test_snapping_values_span_selector(ax):
    def onselect(*args):
        pass

    tool = widgets.SpanSelector(ax, onselect, direction='horizontal',)
    snap_function = tool._snap

    snap_values = np.linspace(0, 5, 11)
    values = np.array([-0.1, 0.1, 0.2, 0.5, 0.6, 0.7, 0.9, 4.76, 5.0, 5.5])
    expect = np.array([00.0, 0.0, 0.0, 0.5, 0.5, 0.5, 1.0, 5.00, 5.0, 5.0])
    values = snap_function(values, snap_values)
    assert_allclose(values, expect)


def test_span_selector_snap(ax):
    def onselect(vmin, vmax):
        ax._got_onselect = True

    snap_values = np.arange(50) * 4

    tool = widgets.SpanSelector(ax, onselect, direction='horizontal',
                                snap_values=snap_values)
    tool.extents = (17, 35)
    assert tool.extents == (16, 36)

    tool.snap_values = None
    assert tool.snap_values is None
    tool.extents = (17, 35)
    assert tool.extents == (17, 35)


def test_span_selector_extents(ax):
    tool = widgets.SpanSelector(
        ax, lambda a, b: None, "horizontal", ignore_event_outside=True
        )
    tool.extents = (5, 10)

    assert tool.extents == (5, 10)
    assert tool._selection_completed

    # Since `ignore_event_outside=True`, this event should be ignored
    press_data = (12, 14)
    release_data = (20, 14)
    click_and_drag(tool, start=press_data, end=release_data)

    assert tool.extents == (5, 10)


@pytest.mark.parametrize('kwargs', [
    dict(),
    dict(useblit=False, props=dict(color='red')),
    dict(useblit=True, button=1),
])
def test_lasso_selector(ax, kwargs):
    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.LassoSelector(ax, onselect=onselect, **kwargs)
    do_event(tool, 'press', xdata=100, ydata=100, button=1)
    do_event(tool, 'onmove', xdata=125, ydata=125, button=1)
    do_event(tool, 'release', xdata=150, ydata=150, button=1)

    onselect.assert_called_once_with([(100, 100), (125, 125), (150, 150)])


def test_lasso_selector_set_props(ax):
    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.LassoSelector(ax, onselect=onselect,
                                 props=dict(color='b', alpha=0.2))

    artist = tool._selection_artist
    assert mcolors.same_color(artist.get_color(), 'b')
    assert artist.get_alpha() == 0.2
    tool.set_props(color='r', alpha=0.3)
    assert mcolors.same_color(artist.get_color(), 'r')
    assert artist.get_alpha() == 0.3


def test_lasso_set_props(ax):
    onselect = mock.Mock(spec=noop, return_value=None)
    tool = widgets.Lasso(ax, (100, 100), onselect)
    line = tool.line
    assert mcolors.same_color(line.get_color(), 'black')
    assert line.get_linestyle() == '-'
    assert line.get_lw() == 2
    tool = widgets.Lasso(ax, (100, 100), onselect, props=dict(
        linestyle='-', color='darkblue', alpha=0.2, lw=1))

    line = tool.line
    assert mcolors.same_color(line.get_color(), 'darkblue')
    assert line.get_alpha() == 0.2
    assert line.get_lw() == 1
    assert line.get_linestyle() == '-'
    line.set_color('r')
    line.set_alpha(0.3)
    assert mcolors.same_color(line.get_color(), 'r')
    assert line.get_alpha() == 0.3


def test_CheckButtons(ax):
    labels = ('a', 'b', 'c')
    check = widgets.CheckButtons(ax, labels, (True, False, True))
    assert check.get_status() == [True, False, True]
    check.set_active(0)
    assert check.get_status() == [False, False, True]
    assert check.get_checked_labels() == ['c']
    check.clear()
    assert check.get_status() == [False, False, False]
    assert check.get_checked_labels() == []

    for invalid_index in [-1, len(labels), len(labels)+5]:
        with pytest.raises(ValueError):
            check.set_active(index=invalid_index)

    for invalid_value in ['invalid', -1]:
        with pytest.raises(TypeError):
            check.set_active(1, state=invalid_value)

    cid = check.on_clicked(lambda: None)
    check.disconnect(cid)


@pytest.mark.parametrize("toolbar", ["none", "toolbar2", "toolmanager"])
def test_TextBox(ax, toolbar):
    # Avoid "toolmanager is provisional" warning.
    plt.rcParams._set("toolbar", toolbar)

    submit_event = mock.Mock(spec=noop, return_value=None)
    text_change_event = mock.Mock(spec=noop, return_value=None)
    tool = widgets.TextBox(ax, '')
    tool.on_submit(submit_event)
    tool.on_text_change(text_change_event)

    assert tool.text == ''

    do_event(tool, '_click')

    tool.set_val('x**2')

    assert tool.text == 'x**2'
    assert text_change_event.call_count == 1

    tool.begin_typing()
    tool.stop_typing()

    assert submit_event.call_count == 2

    do_event(tool, '_click', xdata=.5, ydata=.5)  # Ensure the click is in the axes.
    do_event(tool, '_keypress', key='+')
    do_event(tool, '_keypress', key='5')

    assert text_change_event.call_count == 3


def test_RadioButtons(ax):
    radio = widgets.RadioButtons(ax, ('Radio 1', 'Radio 2', 'Radio 3'))
    radio.set_active(1)
    assert radio.value_selected == 'Radio 2'
    assert radio.index_selected == 1
    radio.clear()
    assert radio.value_selected == 'Radio 1'
    assert radio.index_selected == 0


@image_comparison(['check_radio_buttons.png'], style='mpl20', remove_text=True)
def test_check_radio_buttons_image():
    ax = get_ax()
    fig = ax.get_figure(root=False)
    fig.subplots_adjust(left=0.3)

    rax1 = fig.add_axes((0.05, 0.7, 0.2, 0.15))
    rb1 = widgets.RadioButtons(rax1, ('Radio 1', 'Radio 2', 'Radio 3'))

    rax2 = fig.add_axes((0.05, 0.5, 0.2, 0.15))
    cb1 = widgets.CheckButtons(rax2, ('Check 1', 'Check 2', 'Check 3'),
                               (False, True, True))

    rax3 = fig.add_axes((0.05, 0.3, 0.2, 0.15))
    rb3 = widgets.RadioButtons(
        rax3, ('Radio 1', 'Radio 2', 'Radio 3'),
        label_props={'fontsize': [8, 12, 16],
                     'color': ['red', 'green', 'blue']},
        radio_props={'edgecolor': ['red', 'green', 'blue'],
                     'facecolor': ['mistyrose', 'palegreen', 'lightblue']})

    rax4 = fig.add_axes((0.05, 0.1, 0.2, 0.15))
    cb4 = widgets.CheckButtons(
        rax4, ('Check 1', 'Check 2', 'Check 3'), (False, True, True),
        label_props={'fontsize': [8, 12, 16],
                     'color': ['red', 'green', 'blue']},
        frame_props={'edgecolor': ['red', 'green', 'blue'],
                     'facecolor': ['mistyrose', 'palegreen', 'lightblue']},
        check_props={'color': ['red', 'green', 'blue']})


@check_figures_equal(extensions=["png"])
def test_radio_buttons(fig_test, fig_ref):
    widgets.RadioButtons(fig_test.subplots(), ["tea", "coffee"])
    ax = fig_ref.add_subplot(xticks=[], yticks=[])
    ax.scatter([.15, .15], [2/3, 1/3], transform=ax.transAxes,
               s=(plt.rcParams["font.size"] / 2) ** 2, c=["C0", "none"])
    ax.text(.25, 2/3, "tea", transform=ax.transAxes, va="center")
    ax.text(.25, 1/3, "coffee", transform=ax.transAxes, va="center")


@check_figures_equal(extensions=['png'])
def test_radio_buttons_props(fig_test, fig_ref):
    label_props = {'color': ['red'], 'fontsize': [24]}
    radio_props = {'facecolor': 'green', 'edgecolor': 'blue', 'linewidth': 2}

    widgets.RadioButtons(fig_ref.subplots(), ['tea', 'coffee'],
                         label_props=label_props, radio_props=radio_props)

    cb = widgets.RadioButtons(fig_test.subplots(), ['tea', 'coffee'])
    cb.set_label_props(label_props)
    # Setting the label size automatically increases default marker size, so we
    # need to do that here as well.
    cb.set_radio_props({**radio_props, 's': (24 / 2)**2})


def test_radio_button_active_conflict(ax):
    with pytest.warns(UserWarning,
                      match=r'Both the \*activecolor\* parameter'):
        rb = widgets.RadioButtons(ax, ['tea', 'coffee'], activecolor='red',
                                  radio_props={'facecolor': 'green'})
    # *radio_props*' facecolor wins over *activecolor*
    assert mcolors.same_color(rb._buttons.get_facecolor(), ['green', 'none'])


@check_figures_equal(extensions=['png'])
def test_radio_buttons_activecolor_change(fig_test, fig_ref):
    widgets.RadioButtons(fig_ref.subplots(), ['tea', 'coffee'],
                         activecolor='green')

    # Test property setter.
    cb = widgets.RadioButtons(fig_test.subplots(), ['tea', 'coffee'],
                              activecolor='red')
    cb.activecolor = 'green'


@check_figures_equal(extensions=["png"])
def test_check_buttons(fig_test, fig_ref):
    widgets.CheckButtons(fig_test.subplots(), ["tea", "coffee"], [True, True])
    ax = fig_ref.add_subplot(xticks=[], yticks=[])
    ax.scatter([.15, .15], [2/3, 1/3], marker='s', transform=ax.transAxes,
               s=(plt.rcParams["font.size"] / 2) ** 2, c=["none", "none"])
    ax.scatter([.15, .15], [2/3, 1/3], marker='x', transform=ax.transAxes,
               s=(plt.rcParams["font.size"] / 2) ** 2, c=["k", "k"])
    ax.text(.25, 2/3, "tea", transform=ax.transAxes, va="center")
    ax.text(.25, 1/3, "coffee", transform=ax.transAxes, va="center")


@check_figures_equal(extensions=['png'])
def test_check_button_props(fig_test, fig_ref):
    label_props = {'color': ['red'], 'fontsize': [24]}
    frame_props = {'facecolor': 'green', 'edgecolor': 'blue', 'linewidth': 2}
    check_props = {'facecolor': 'red', 'linewidth': 2}

    widgets.CheckButtons(fig_ref.subplots(), ['tea', 'coffee'], [True, True],
                         label_props=label_props, frame_props=frame_props,
                         check_props=check_props)

    cb = widgets.CheckButtons(fig_test.subplots(), ['tea', 'coffee'],
                              [True, True])
    cb.set_label_props(label_props)
    # Setting the label size automatically increases default marker size, so we
    # need to do that here as well.
    cb.set_frame_props({**frame_props, 's': (24 / 2)**2})
    # FIXME: Axes.scatter promotes facecolor to edgecolor on unfilled markers,
    # but Collection.update doesn't do that (it forgot the marker already).
    # This means we cannot pass facecolor to both setters directly.
    check_props['edgecolor'] = check_props.pop('facecolor')
    cb.set_check_props({**check_props, 's': (24 / 2)**2})


def test_slider_slidermin_slidermax_invalid():
    fig, ax = plt.subplots()
    # test min/max with floats
    with pytest.raises(ValueError):
        widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                       slidermin=10.0)
    with pytest.raises(ValueError):
        widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                       slidermax=10.0)


def test_slider_slidermin_slidermax():
    fig, ax = plt.subplots()
    slider_ = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                             valinit=5.0)

    slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                            valinit=1.0, slidermin=slider_)
    assert slider.val == slider_.val

    slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                            valinit=10.0, slidermax=slider_)
    assert slider.val == slider_.val


def test_slider_valmin_valmax():
    fig, ax = plt.subplots()
    slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                            valinit=-10.0)
    assert slider.val == slider.valmin

    slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                            valinit=25.0)
    assert slider.val == slider.valmax


def test_slider_valstep_snapping():
    fig, ax = plt.subplots()
    slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                            valinit=11.4, valstep=1)
    assert slider.val == 11

    slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
                            valinit=11.4, valstep=[0, 1, 5.5, 19.7])
    assert slider.val == 5.5


def test_slider_horizontal_vertical():
    fig, ax = plt.subplots()
    slider = widgets.Slider(ax=ax, label='', valmin=0, valmax=24,
                            valinit=12, orientation='horizontal')
    slider.set_val(10)
    assert slider.val == 10
    # check the dimension of the slider patch in axes units
    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.bounds, [0, .25, 10/24, .5])

    fig, ax = plt.subplots()
    slider = widgets.Slider(ax=ax, label='', valmin=0, valmax=24,
                            valinit=12, orientation='vertical')
    slider.set_val(10)
    assert slider.val == 10
    # check the dimension of the slider patch in axes units
    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.bounds, [.25, 0, .5, 10/24])


def test_slider_reset():
    fig, ax = plt.subplots()
    slider = widgets.Slider(ax=ax, label='', valmin=0, valmax=1, valinit=.5)
    slider.set_val(0.75)
    slider.reset()
    assert slider.val == 0.5


@pytest.mark.parametrize("orientation", ["horizontal", "vertical"])
def test_range_slider(orientation):
    if orientation == "vertical":
        idx = [1, 0, 3, 2]
    else:
        idx = [0, 1, 2, 3]

    fig, ax = plt.subplots()

    slider = widgets.RangeSlider(
        ax=ax, label="", valmin=0.0, valmax=1.0, orientation=orientation,
        valinit=[0.1, 0.34]
    )
    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.get_points().flatten()[idx], [0.1, 0.25, 0.34, 0.75])

    # Check initial value is set correctly
    assert_allclose(slider.val, (0.1, 0.34))

    def handle_positions(slider):
        if orientation == "vertical":
            return [h.get_ydata()[0] for h in slider._handles]
        else:
            return [h.get_xdata()[0] for h in slider._handles]

    slider.set_val((0.4, 0.6))
    assert_allclose(slider.val, (0.4, 0.6))
    assert_allclose(handle_positions(slider), (0.4, 0.6))

    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.get_points().flatten()[idx], [0.4, .25, 0.6, .75])

    slider.set_val((0.2, 0.1))
    assert_allclose(slider.val, (0.1, 0.2))
    assert_allclose(handle_positions(slider), (0.1, 0.2))

    slider.set_val((-1, 10))
    assert_allclose(slider.val, (0, 1))
    assert_allclose(handle_positions(slider), (0, 1))

    slider.reset()
    assert_allclose(slider.val, (0.1, 0.34))
    assert_allclose(handle_positions(slider), (0.1, 0.34))


@pytest.mark.parametrize("orientation", ["horizontal", "vertical"])
def test_range_slider_same_init_values(orientation):
    if orientation == "vertical":
        idx = [1, 0, 3, 2]
    else:
        idx = [0, 1, 2, 3]

    fig, ax = plt.subplots()

    slider = widgets.RangeSlider(
         ax=ax, label="", valmin=0.0, valmax=1.0, orientation=orientation,
         valinit=[0, 0]
     )
    box = slider.poly.get_extents().transformed(ax.transAxes.inverted())
    assert_allclose(box.get_points().flatten()[idx], [0, 0.25, 0, 0.75])


def check_polygon_selector(event_sequence, expected_result, selections_count,
                           **kwargs):
    """
    Helper function to test Polygon Selector.

    Parameters
    ----------
    event_sequence : list of tuples (etype, dict())
        A sequence of events to perform. The sequence is a list of tuples
        where the first element of the tuple is an etype (e.g., 'onmove',
        'press', etc.), and the second element of the tuple is a dictionary of
         the arguments for the event (e.g., xdata=5, key='shift', etc.).
    expected_result : list of vertices (xdata, ydata)
        The list of vertices that are expected to result from the event
        sequence.
    selections_count : int
        Wait for the tool to call its `onselect` function `selections_count`
        times, before comparing the result to the `expected_result`
    **kwargs
        Keyword arguments are passed to PolygonSelector.
    """
    ax = get_ax()

    onselect = mock.Mock(spec=noop, return_value=None)

    tool = widgets.PolygonSelector(ax, onselect=onselect, **kwargs)

    for (etype, event_args) in event_sequence:
        do_event(tool, etype, **event_args)

    assert onselect.call_count == selections_count
    assert onselect.call_args == ((expected_result, ), {})


def polygon_place_vertex(xdata, ydata):
    return [('onmove', dict(xdata=xdata, ydata=ydata)),
            ('press', dict(xdata=xdata, ydata=ydata)),
            ('release', dict(xdata=xdata, ydata=ydata))]


def polygon_remove_vertex(xdata, ydata):
    return [('onmove', dict(xdata=xdata, ydata=ydata)),
            ('press', dict(xdata=xdata, ydata=ydata, button=3)),
            ('release', dict(xdata=xdata, ydata=ydata, button=3))]


@pytest.mark.parametrize('draw_bounding_box', [False, True])
def test_polygon_selector(draw_bounding_box):
    check_selector = functools.partial(
        check_polygon_selector, draw_bounding_box=draw_bounding_box)

    # Simple polygon
    expected_result = [(50, 50), (150, 50), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 50),
    ]
    check_selector(event_sequence, expected_result, 1)

    # Move first vertex before completing the polygon.
    expected_result = [(75, 50), (150, 50), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        ('on_key_press', dict(key='control')),
        ('onmove', dict(xdata=50, ydata=50)),
        ('press', dict(xdata=50, ydata=50)),
        ('onmove', dict(xdata=75, ydata=50)),
        ('release', dict(xdata=75, ydata=50)),
        ('on_key_release', dict(key='control')),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(75, 50),
    ]
    check_selector(event_sequence, expected_result, 1)

    # Move first two vertices at once before completing the polygon.
    expected_result = [(50, 75), (150, 75), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        ('on_key_press', dict(key='shift')),
        ('onmove', dict(xdata=100, ydata=100)),
        ('press', dict(xdata=100, ydata=100)),
        ('onmove', dict(xdata=100, ydata=125)),
        ('release', dict(xdata=100, ydata=125)),
        ('on_key_release', dict(key='shift')),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 75),
    ]
    check_selector(event_sequence, expected_result, 1)

    # Move first vertex after completing the polygon.
    expected_result = [(75, 50), (150, 50), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 50),
        ('onmove', dict(xdata=50, ydata=50)),
        ('press', dict(xdata=50, ydata=50)),
        ('onmove', dict(xdata=75, ydata=50)),
        ('release', dict(xdata=75, ydata=50)),
    ]
    check_selector(event_sequence, expected_result, 2)

    # Move all vertices after completing the polygon.
    expected_result = [(75, 75), (175, 75), (75, 175)]
    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 50),
        ('on_key_press', dict(key='shift')),
        ('onmove', dict(xdata=100, ydata=100)),
        ('press', dict(xdata=100, ydata=100)),
        ('onmove', dict(xdata=125, ydata=125)),
        ('release', dict(xdata=125, ydata=125)),
        ('on_key_release', dict(key='shift')),
    ]
    check_selector(event_sequence, expected_result, 2)

    # Try to move a vertex and move all before placing any vertices.
    expected_result = [(50, 50), (150, 50), (50, 150)]
    event_sequence = [
        ('on_key_press', dict(key='control')),
        ('onmove', dict(xdata=100, ydata=100)),
        ('press', dict(xdata=100, ydata=100)),
        ('onmove', dict(xdata=125, ydata=125)),
        ('release', dict(xdata=125, ydata=125)),
        ('on_key_release', dict(key='control')),
        ('on_key_press', dict(key='shift')),
        ('onmove', dict(xdata=100, ydata=100)),
        ('press', dict(xdata=100, ydata=100)),
        ('onmove', dict(xdata=125, ydata=125)),
        ('release', dict(xdata=125, ydata=125)),
        ('on_key_release', dict(key='shift')),
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 50),
    ]
    check_selector(event_sequence, expected_result, 1)

    # Try to place vertex out-of-bounds, then reset, and start a new polygon.
    expected_result = [(50, 50), (150, 50), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(250, 50),
        ('on_key_press', dict(key='escape')),
        ('on_key_release', dict(key='escape')),
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 50),
    ]
    check_selector(event_sequence, expected_result, 1)


@pytest.mark.parametrize('draw_bounding_box', [False, True])
def test_polygon_selector_set_props_handle_props(ax, draw_bounding_box):
    tool = widgets.PolygonSelector(ax,
                                   props=dict(color='b', alpha=0.2),
                                   handle_props=dict(alpha=0.5),
                                   draw_bounding_box=draw_bounding_box)

    event_sequence = [
        *polygon_place_vertex(50, 50),
        *polygon_place_vertex(150, 50),
        *polygon_place_vertex(50, 150),
        *polygon_place_vertex(50, 50),
    ]

    for (etype, event_args) in event_sequence:
        do_event(tool, etype, **event_args)

    artist = tool._selection_artist
    assert artist.get_color() == 'b'
    assert artist.get_alpha() == 0.2
    tool.set_props(color='r', alpha=0.3)
    assert artist.get_color() == 'r'
    assert artist.get_alpha() == 0.3

    for artist in tool._handles_artists:
        assert artist.get_color() == 'b'
        assert artist.get_alpha() == 0.5
    tool.set_handle_props(color='r', alpha=0.3)
    for artist in tool._handles_artists:
        assert artist.get_color() == 'r'
        assert artist.get_alpha() == 0.3


@check_figures_equal()
def test_rect_visibility(fig_test, fig_ref):
    # Check that requesting an invisible selector makes it invisible
    ax_test = fig_test.subplots()
    _ = fig_ref.subplots()

    tool = widgets.RectangleSelector(ax_test, props={'visible': False})
    tool.extents = (0.2, 0.8, 0.3, 0.7)


# Change the order that the extra point is inserted in
@pytest.mark.parametrize('idx', [1, 2, 3])
@pytest.mark.parametrize('draw_bounding_box', [False, True])
def test_polygon_selector_remove(idx, draw_bounding_box):
    verts = [(50, 50), (150, 50), (50, 150)]
    event_sequence = [polygon_place_vertex(*verts[0]),
                      polygon_place_vertex(*verts[1]),
                      polygon_place_vertex(*verts[2]),
                      # Finish the polygon
                      polygon_place_vertex(*verts[0])]
    # Add an extra point
    event_sequence.insert(idx, polygon_place_vertex(200, 200))
    # Remove the extra point
    event_sequence.append(polygon_remove_vertex(200, 200))
    # Flatten list of lists
    event_sequence = functools.reduce(operator.iadd, event_sequence, [])
    check_polygon_selector(event_sequence, verts, 2,
                           draw_bounding_box=draw_bounding_box)


@pytest.mark.parametrize('draw_bounding_box', [False, True])
def test_polygon_selector_remove_first_point(draw_bounding_box):
    verts = [(50, 50), (150, 50), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(*verts[0]),
        *polygon_place_vertex(*verts[1]),
        *polygon_place_vertex(*verts[2]),
        *polygon_place_vertex(*verts[0]),
        *polygon_remove_vertex(*verts[0]),
    ]
    check_polygon_selector(event_sequence, verts[1:], 2,
                           draw_bounding_box=draw_bounding_box)


@pytest.mark.parametrize('draw_bounding_box', [False, True])
def test_polygon_selector_redraw(ax, draw_bounding_box):
    verts = [(50, 50), (150, 50), (50, 150)]
    event_sequence = [
        *polygon_place_vertex(*verts[0]),
        *polygon_place_vertex(*verts[1]),
        *polygon_place_vertex(*verts[2]),
        *polygon_place_vertex(*verts[0]),
        # Polygon completed, now remove first two verts.
        *polygon_remove_vertex(*verts[1]),
        *polygon_remove_vertex(*verts[2]),
        # At this point the tool should be reset so we can add more vertices.
        *polygon_place_vertex(*verts[1]),
    ]

    tool = widgets.PolygonSelector(ax, draw_bounding_box=draw_bounding_box)
    for (etype, event_args) in event_sequence:
        do_event(tool, etype, **event_args)
    # After removing two verts, only one remains, and the
    # selector should be automatically resete
    assert tool.verts == verts[0:2]


@pytest.mark.parametrize('draw_bounding_box', [False, True])
@check_figures_equal(extensions=['png'])
def test_polygon_selector_verts_setter(fig_test, fig_ref, draw_bounding_box):
    verts = [(0.1, 0.4), (0.5, 0.9), (0.3, 0.2)]
    ax_test = fig_test.add_subplot()

    tool_test = widgets.PolygonSelector(ax_test, draw_bounding_box=draw_bounding_box)
    tool_test.verts = verts
    assert tool_test.verts == verts

    ax_ref = fig_ref.add_subplot()
    tool_ref = widgets.PolygonSelector(ax_ref, draw_bounding_box=draw_bounding_box)
    event_sequence = [
        *polygon_place_vertex(*verts[0]),
        *polygon_place_vertex(*verts[1]),
        *polygon_place_vertex(*verts[2]),
        *polygon_place_vertex(*verts[0]),
    ]
    for (etype, event_args) in event_sequence:
        do_event(tool_ref, etype, **event_args)


def test_polygon_selector_box(ax):
    # Create a diamond (adjusting axes lims s.t. the diamond lies within axes limits).
    ax.set(xlim=(-10, 50), ylim=(-10, 50))
    verts = [(20, 0), (0, 20), (20, 40), (40, 20)]
    event_sequence = [
        *polygon_place_vertex(*verts[0]),
        *polygon_place_vertex(*verts[1]),
        *polygon_place_vertex(*verts[2]),
        *polygon_place_vertex(*verts[3]),
        *polygon_place_vertex(*verts[0]),
    ]

    # Create selector
    tool = widgets.PolygonSelector(ax, draw_bounding_box=True)
    for (etype, event_args) in event_sequence:
        do_event(tool, etype, **event_args)

    # In order to trigger the correct callbacks, trigger events on the canvas
    # instead of the individual tools
    t = ax.transData
    canvas = ax.get_figure(root=True).canvas

    # Scale to half size using the top right corner of the bounding box
    MouseEvent(
        "button_press_event", canvas, *t.transform((40, 40)), 1)._process()
    MouseEvent(
        "motion_notify_event", canvas, *t.transform((20, 20)))._process()
    MouseEvent(
        "button_release_event", canvas, *t.transform((20, 20)), 1)._process()
    np.testing.assert_allclose(
        tool.verts, [(10, 0), (0, 10), (10, 20), (20, 10)])

    # Move using the center of the bounding box
    MouseEvent(
        "button_press_event", canvas, *t.transform((10, 10)), 1)._process()
    MouseEvent(
        "motion_notify_event", canvas, *t.transform((30, 30)))._process()
    MouseEvent(
        "button_release_event", canvas, *t.transform((30, 30)), 1)._process()
    np.testing.assert_allclose(
        tool.verts, [(30, 20), (20, 30), (30, 40), (40, 30)])

    # Remove a point from the polygon and check that the box extents update
    np.testing.assert_allclose(
        tool._box.extents, (20.0, 40.0, 20.0, 40.0))

    MouseEvent(
        "button_press_event", canvas, *t.transform((30, 20)), 3)._process()
    MouseEvent(
        "button_release_event", canvas, *t.transform((30, 20)), 3)._process()
    np.testing.assert_allclose(
        tool.verts, [(20, 30), (30, 40), (40, 30)])
    np.testing.assert_allclose(
        tool._box.extents, (20.0, 40.0, 30.0, 40.0))


def test_polygon_selector_clear_method(ax):
    onselect = mock.Mock(spec=noop, return_value=None)
    tool = widgets.PolygonSelector(ax, onselect)

    for result in ([(50, 50), (150, 50), (50, 150), (50, 50)],
                   [(50, 50), (100, 50), (50, 150), (50, 50)]):
        for x, y in result:
            for etype, event_args in polygon_place_vertex(x, y):
                do_event(tool, etype, **event_args)

        artist = tool._selection_artist

        assert tool._selection_completed
        assert tool.get_visible()
        assert artist.get_visible()
        np.testing.assert_equal(artist.get_xydata(), result)
        assert onselect.call_args == ((result[:-1],), {})

        tool.clear()
        assert not tool._selection_completed
        np.testing.assert_equal(artist.get_xydata(), [(0, 0)])


@pytest.mark.parametrize("horizOn", [False, True])
@pytest.mark.parametrize("vertOn", [False, True])
def test_MultiCursor(horizOn, vertOn):
    fig = plt.figure()
    (ax1, ax3) = fig.subplots(2, sharex=True)
    ax2 = plt.figure().subplots()

    # useblit=false to avoid having to draw the figure to cache the renderer
    multi = widgets.MultiCursor(
        None, (ax1, ax2), useblit=False, horizOn=horizOn, vertOn=vertOn
    )

    # Only two of the axes should have a line drawn on them.
    assert len(multi.vlines) == 2
    assert len(multi.hlines) == 2

    # mock a motion_notify_event
    # Can't use `do_event` as that helper requires the widget
    # to have a single .ax attribute.
    event = mock_event(ax1, xdata=.5, ydata=.25)
    multi.onmove(event)
    # force a draw + draw event to exercise clear
    fig.canvas.draw()

    # the lines in the first two ax should both move
    for l in multi.vlines:
        assert l.get_xdata() == (.5, .5)
    for l in multi.hlines:
        assert l.get_ydata() == (.25, .25)
    # The relevant lines get turned on after move.
    assert len([line for line in multi.vlines if line.get_visible()]) == (
        2 if vertOn else 0)
    assert len([line for line in multi.hlines if line.get_visible()]) == (
        2 if horizOn else 0)

    # After toggling settings, the opposite lines should be visible after move.
    multi.horizOn = not multi.horizOn
    multi.vertOn = not multi.vertOn
    event = mock_event(ax1, xdata=.5, ydata=.25)
    multi.onmove(event)
    assert len([line for line in multi.vlines if line.get_visible()]) == (
        0 if vertOn else 2)
    assert len([line for line in multi.hlines if line.get_visible()]) == (
        0 if horizOn else 2)

    # test a move event in an Axes not part of the MultiCursor
    # the lines in ax1 and ax2 should not have moved.
    event = mock_event(ax3, xdata=.75, ydata=.75)
    multi.onmove(event)
    for l in multi.vlines:
        assert l.get_xdata() == (.5, .5)
    for l in multi.hlines:
        assert l.get_ydata() == (.25, .25)
