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_pg_figure.py
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_pg_figure.py
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# -*- coding: utf-8 -*-
"""Base classes and functions for 2D browser backends."""
# Author: Martin Schulz <[email protected]>
#
# License: BSD-3-Clause
import datetime
import functools
import gc
import math
import platform
import sys
import weakref
from pathlib import Path
from ast import literal_eval
from collections import OrderedDict
from copy import copy
from functools import partial
from os.path import getsize
import numpy as np
from qtpy.QtCore import (QEvent, QThread, Qt, Signal, QRectF, QLineF,
QPointF, QPoint, QSettings)
from qtpy.QtGui import (QFont, QIcon, QPixmap, QTransform, QGuiApplication,
QMouseEvent, QImage, QPainter, QPainterPath)
from qtpy.QtTest import QTest
from qtpy.QtWidgets import (QAction, QColorDialog, QComboBox, QDialog,
QDockWidget, QDoubleSpinBox, QFormLayout,
QGridLayout, QHBoxLayout, QInputDialog,
QLabel, QMainWindow, QMessageBox, QToolButton,
QPushButton, QScrollBar, QWidget, QMenu,
QStyleOptionSlider, QStyle, QActionGroup,
QApplication, QGraphicsView, QProgressBar,
QVBoxLayout, QLineEdit, QCheckBox, QScrollArea,
QGraphicsLineItem, QGraphicsScene, QTextEdit,
QSizePolicy, QSpinBox, QSlider, QWidgetAction,
QRadioButton)
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from matplotlib.colors import to_rgba_array
from pyqtgraph import (AxisItem, GraphicsView, InfLineLabel, InfiniteLine,
LinearRegionItem, PlotCurveItem, PlotItem,
Point, TextItem, ViewBox, mkBrush,
mkPen, setConfigOption, mkColor)
from scipy.stats import zscore
from colorspacious import cspace_convert
import scooby
from mne.viz import plot_sensors
from mne.viz._figure import BrowserBase
from mne.viz.utils import _simplify_float, _merge_annotations, _figure_agg
from mne.annotations import _sync_onset
from mne.io.pick import (_DATA_CH_TYPES_ORDER_DEFAULT,
channel_indices_by_type, _DATA_CH_TYPES_SPLIT)
from mne.utils import (_to_rgb, logger, sizeof_fmt, warn, get_config,
_check_option)
from . import _browser_instances
from ._fixes import capture_exceptions, _qt_raise_window, _init_mne_qtapp
name = 'pyqtgraph'
# MNE's butterfly plots traditionally default to the channel ordering of
# mag, grad, ..., which is inconsistent with the order in non-butterfly mode
# and hence doesn't match the order in the overview bar either. So we swap
# grads and mags here.
DATA_CH_TYPES_ORDER = ('grad', 'mag', *_DATA_CH_TYPES_ORDER_DEFAULT[2:])
# Mostly chosen manually from
# https://matplotlib.org/3.1.0/gallery/color/named_colors.html
_dark_dict = {
# 'w' (bgcolor)
(255, 255, 255): (30, 30, 30), # safari's centered info panel background
# 'k' (eeg, eog, emg, misc, stim, resp, chpi, exci, ias, syst, dipole, gof,
# bio, ecog, fnirs_*, csd, whitened)
(0, 0, 0): (255, 255, 255), # 'w'
# 'darkblue' (mag)
(0, 0, 139): (173, 216, 230), # 'lightblue'
# 'b' (grad, hbr)
(0, 0, 255): (100, 149, 237), # 'cornflowerblue'
# 'steelblue' (ref_meg)
(70, 130, 180): (176, 196, 222), # 'lightsteelblue'
# 'm' (ecg)
(191, 0, 191): (238, 130, 238), # 'violet'
# 'saddlebrown' (seeg)
(139, 69, 19): (244, 164, 96), # 'sandybrown'
# 'seagreen' (dbs)
(46, 139, 87): (32, 178, 170), # 'lightseagreen'
# '#AA3377' (hbo), closest to 'mediumvioletred'
(170, 51, 119): (255, 105, 180), # 'hotpink'
# 'lightgray' (bad_color)
(211, 211, 211): (105, 105, 105), # 'dimgray'
# 'cyan' (event_color)
(0, 255, 255): (0, 139, 139), # 'darkcyan'
}
def _get_color(color_spec, invert=False):
"""Wraps mkColor to accept all possible matplotlib color-specifiers."""
orig_spec = color_spec
try:
# Convert matplotlib color-names if possible
color_spec = _to_rgb(color_spec, alpha=True)
except ValueError:
pass
# Convert tuples of floats from 0-1 to 0-255 for pyqtgraph
if (isinstance(color_spec, tuple) and
all([i <= 1 for i in color_spec])):
color_spec = tuple([int(i * 255) for i in color_spec])
try:
color = mkColor(color_spec)
except ValueError:
raise ValueError(f'"{color_spec}" is not a valid matplotlib '
f'color-specifier!') from None
if invert:
# First see if the color is in our inversion dictionary
key = color.getRgb()
assert len(key) == 4
if key[:3] in _dark_dict:
color.setRgb(*(_dark_dict[key[:3]] + key[-1:]))
else:
logger.debug(f'Missed {key} from {orig_spec}')
rgba = np.array(color.getRgbF())
lab = cspace_convert(rgba[:3], 'sRGB1', 'CIELab')
lab[0] = 100. - lab[0]
rgba[:3] = np.clip(cspace_convert(lab, 'CIELab', 'sRGB1'), 0, 1)
color.setRgbF(*rgba)
return color
def propagate_to_children(method):
@functools.wraps(method)
def wrapper(*args, **kwargs):
propagate = kwargs.pop('propagate', True)
result = method(*args, **kwargs)
if args[0].mne.is_epochs and propagate:
# parent always goes first
if hasattr(args[0], 'child_traces'):
for child_trace in args[0].child_traces:
getattr(child_trace, method.__name__)(*args[1:], **kwargs)
return result
return wrapper
def _safe_splash(meth):
@functools.wraps(meth)
def func(self, *args, **kwargs):
try:
meth(self, *args, **kwargs)
finally:
try:
self.mne.splash.close()
except Exception:
pass
finally:
try:
del self.mne.splash
except Exception:
pass
return func
class DataTrace(PlotCurveItem):
"""Graphics-Object for single data trace."""
def __init__(self, main, ch_idx, child_idx=None, parent_trace=None):
super().__init__()
self.weakmain = weakref.ref(main)
self.mne = main.mne
del main
# Set clickable with small area around trace to make clicking easier.
self.setClickable(True, 12)
# Set default z-value to 1 to be before other items in scene
self.setZValue(1)
# General attributes
# The ch_idx is the index of the channel represented by this trace
# in the channel-order from the unchanged instance (which also picks
# refer to).
self.ch_idx = None
# The range_idx is the index of the channel represented by this trace
# in the shown range.
self.range_idx = None
# The order_idx is the index of the channel represented by this trace
# in the channel-order (defined e.g. by group_by).
self.order_idx = None
# Name of the channel the trace represents.
self.ch_name = None
# Indicates if trace is bad.
self.isbad = None
# Channel-type of trace.
self.ch_type = None
# Color-specifier (all possible matplotlib color formats)
self.color = None
# Attributes for epochs-mode
# Index of child if child.
self.child_idx = child_idx
# Reference to parent if child.
self.parent_trace = parent_trace
# Only for parent traces
if self.parent_trace is None:
# Add to main trace list
self.mne.traces.append(self)
# References to children
self.child_traces = list()
# Colors of trace in viewrange
self.trace_colors = None
# set attributes
self.set_ch_idx(ch_idx)
self.update_color()
self.update_scale()
# Avoid calling self.update_data() twice on initialization
# (because of update_scale()).
if self.mne.clipping is None:
self.update_data()
# Add to main plot
self.mne.plt.addItem(self)
@propagate_to_children
def remove(self):
self.mne.plt.removeItem(self)
# Only for parent trace
if self.parent_trace is None:
self.mne.traces.remove(self)
self.deleteLater()
@propagate_to_children
def update_color(self):
"""Update the color of the trace."""
# Epochs
if self.mne.is_epochs:
# Add child traces if shown trace needs to have multiple colors
# (PlotCurveItem only supports one color per object).
# There always as many color-specific traces added depending
# on the whole time range of the instance regardless of the
# currently visible time range (to avoid checking for new colors
# while scrolling horizontally).
# Only for parent trace
if hasattr(self, 'child_traces'):
self.trace_colors = np.unique(
self.mne.epoch_color_ref[self.ch_idx], axis=0)
n_childs = len(self.child_traces)
trace_diff = len(self.trace_colors) - n_childs - 1
# Add child traces if necessary
if trace_diff > 0:
for cix in range(n_childs, n_childs + trace_diff):
child = DataTrace(self.weakmain(), self.ch_idx,
child_idx=cix, parent_trace=self)
self.child_traces.append(child)
elif trace_diff < 0:
for _ in range(abs(trace_diff)):
rm_trace = self.child_traces.pop()
rm_trace.remove()
# Set parent color
self.color = self.trace_colors[0]
# Only for child trace
else:
self.color = self.parent_trace.trace_colors[
self.child_idx + 1]
# Raw/ICA
else:
if self.isbad:
self.color = self.mne.ch_color_bad
else:
self.color = self.mne.ch_color_ref[self.ch_name]
self.setPen(self.mne.mkPen(_get_color(self.color, self.mne.dark)))
@propagate_to_children
def update_range_idx(self):
"""Should be updated when view-range or ch_idx changes."""
self.range_idx = np.argwhere(self.mne.picks == self.ch_idx)[0][0]
@propagate_to_children
def update_ypos(self):
"""Should be updated when butterfly is toggled or ch_idx changes."""
if self.mne.butterfly and self.mne.fig_selection is not None:
self.ypos = self.mne.selection_ypos_dict[self.ch_idx]
elif self.mne.fig_selection is not None and \
self.mne.old_selection == 'Custom':
self.ypos = self.range_idx + 1
elif self.mne.butterfly:
self.ypos = self.mne.butterfly_type_order.index(self.ch_type) + 1
else:
self.ypos = self.range_idx + self.mne.ch_start + 1
@propagate_to_children
def update_scale(self):
transform = QTransform()
transform.scale(1., self.mne.scale_factor)
self.setTransform(transform)
if self.mne.clipping is not None:
self.update_data(propagate=False)
@propagate_to_children
def set_ch_idx(self, ch_idx):
"""Sets the channel index and all deriving indices."""
# The ch_idx is the index of the channel represented by this trace
# in the channel-order from the unchanged instance (which also picks
# refer to).
self.ch_idx = ch_idx
# The range_idx is the index of the channel represented by this trace
# in the shown range.
self.update_range_idx(propagate=False)
# The order_idx is the index of the channel represented by this trace
# in the channel-order (defined e.g. by group_by).
self.order_idx = np.argwhere(self.mne.ch_order == self.ch_idx)[0][0]
self.ch_name = self.mne.inst.ch_names[ch_idx]
self.isbad = self.ch_name in self.mne.info['bads']
self.ch_type = self.mne.ch_types[ch_idx]
self.update_ypos(propagate=False)
@propagate_to_children
def update_data(self):
"""Update data (fetch data from self.mne according to self.ch_idx)."""
if self.mne.is_epochs or (self.mne.clipping is not None and
self.mne.clipping != 'clamp'):
connect = 'finite'
skip = False
else:
connect = 'all'
skip = True
if self.mne.data_precomputed:
data = self.mne.data[self.order_idx]
else:
data = self.mne.data[self.range_idx]
times = self.mne.times
# Get decim-specific time if enabled
if self.mne.decim != 1:
times = times[::self.mne.decim_data[self.range_idx]]
data = data[..., ::self.mne.decim_data[self.range_idx]]
# For multiple color traces with epochs
# replace values from other colors with NaN.
if self.mne.is_epochs:
data = np.copy(data)
check_color = self.mne.epoch_color_ref[self.ch_idx,
self.mne.epoch_idx]
bool_ixs = np.invert(np.equal(self.color, check_color).all(axis=1))
starts = self.mne.boundary_times[self.mne.epoch_idx][bool_ixs]
stops = self.mne.boundary_times[self.mne.epoch_idx + 1][bool_ixs]
for start, stop in zip(starts, stops):
data[np.logical_and(start <= times, times <= stop)] = np.nan
assert times.shape[-1] == data.shape[-1]
self.setData(times, data, connect=connect, skipFiniteCheck=skip,
antialias=self.mne.antialiasing)
self.setPos(0, self.ypos)
def toggle_bad(self, x=None):
"""Toggle bad status."""
# Toggle bad epoch
if self.mne.is_epochs and x is not None:
epoch_idx, color = self.weakmain()._toggle_bad_epoch(x)
# Update epoch color
if color != 'none':
new_epo_color = np.repeat(to_rgba_array(color),
len(self.mne.inst.ch_names), axis=0)
elif self.mne.epoch_colors is None:
new_epo_color = np.concatenate(
[to_rgba_array(c) for c
in self.mne.ch_color_ref.values()])
else:
new_epo_color = \
np.concatenate([to_rgba_array(c) for c in
self.mne.epoch_colors[epoch_idx]])
# Update bad channel colors
bad_idxs = np.in1d(self.mne.ch_names, self.mne.info['bads'])
new_epo_color[bad_idxs] = to_rgba_array(self.mne.ch_color_bad)
self.mne.epoch_color_ref[:, epoch_idx] = new_epo_color
# Update overview-bar
self.mne.overview_bar.update_bad_epochs()
# Update other traces inlcuding self
for trace in self.mne.traces:
trace.update_color()
# Update data is necessary because colored segments will vary
trace.update_data()
# Toggle bad channel
else:
bad_color, pick, marked_bad = self.weakmain()._toggle_bad_channel(
self.range_idx)
# Update line color status
self.isbad = not self.isbad
# Update colors for epochs
if self.mne.is_epochs:
if marked_bad:
new_ch_color = np.repeat(to_rgba_array(bad_color),
len(self.mne.inst), axis=0)
elif self.mne.epoch_colors is None:
ch_color = self.mne.ch_color_ref[self.ch_name]
new_ch_color = np.repeat(to_rgba_array(ch_color),
len(self.mne.inst), axis=0)
else:
new_ch_color = np.concatenate([to_rgba_array(c[pick]) for
c in self.mne.epoch_colors])
self.mne.epoch_color_ref[pick, :] = new_ch_color
# Update trace color
self.update_color()
if self.mne.is_epochs:
self.update_data()
# Update channel-axis
self.weakmain()._update_yaxis_labels()
# Update overview-bar
self.mne.overview_bar.update_bad_channels()
# Update sensor color (if in selection mode)
if self.mne.fig_selection is not None:
self.mne.fig_selection._update_bad_sensors(pick, marked_bad)
def mouseClickEvent(self, ev):
"""Customize mouse click events."""
if (not self.clickable or ev.button() != Qt.MouseButton.LeftButton
or self.mne.annotation_mode):
# Explicitly ignore events in annotation-mode
ev.ignore()
return
if self.mouseShape().contains(ev.pos()):
ev.accept()
self.toggle_bad(ev.pos().x())
def get_xdata(self):
"""Get xdata for testing."""
return self.xData
def get_ydata(self):
"""Get ydata for testing."""
return self.yData + self.ypos
class TimeAxis(AxisItem):
"""The X-Axis displaying the time."""
def __init__(self, mne):
self.mne = mne
self._spacing = None
super().__init__(orientation='bottom')
def tickValues(self, minVal, maxVal, size):
"""Customize creation of axis values from visible axis range."""
if self.mne.is_epochs:
value_idxs = np.searchsorted(self.mne.midpoints, [minVal, maxVal])
values = self.mne.midpoints[slice(*value_idxs)]
spacing = len(self.mne.inst.times) / self.mne.info['sfreq']
tick_values = [(spacing, values)]
return tick_values
else:
# Save _spacing for later use
self._spacing = self.tickSpacing(minVal, maxVal, size)
return super().tickValues(minVal, maxVal, size)
def tickStrings(self, values, scale, spacing):
"""Customize strings of axis values."""
if self.mne.is_epochs:
epoch_nums = self.mne.inst.selection
ts = epoch_nums[np.searchsorted(self.mne.midpoints, values)]
tick_strings = [str(v) for v in ts]
elif self.mne.time_format == 'clock':
meas_date = self.mne.info['meas_date']
first_time = datetime.timedelta(seconds=self.mne.inst.first_time)
digits = np.ceil(-np.log10(min(v[0] for v in self._spacing)
) + 1).astype(int)
tick_strings = list()
for val in values:
val_time = datetime.timedelta(seconds=val) + \
first_time + meas_date
val_str = val_time.strftime('%H:%M:%S')
if int(val_time.microsecond):
val_str += \
f'{round(val_time.microsecond * 1e-6, digits)}'[1:]
tick_strings.append(val_str)
else:
tick_strings = super().tickStrings(values, scale, spacing)
return tick_strings
def repaint(self):
"""Repaint Time Axis."""
self.picture = None
self.update()
def get_labels(self):
"""Get labels for testing."""
values = self.tickValues(*self.mne.viewbox.viewRange()[0],
self.mne.xmax)
labels = list()
for spacing, vals in values:
labels += self.tickStrings(vals, 1, spacing)
return labels
class ChannelAxis(AxisItem):
"""The Y-Axis displaying the channel-names."""
def __init__(self, main):
self.weakmain = weakref.ref(main)
self.mne = main.mne
del main
self.ch_texts = OrderedDict()
super().__init__(orientation='left')
self.style['autoReduceTextSpace'] = False
def tickValues(self, minVal, maxVal, size):
"""Customize creation of axis values from visible axis range."""
minVal, maxVal = sorted((minVal, maxVal))
values = list(range(round(minVal) + 1, round(maxVal)))
tick_values = [(1, values)]
return tick_values
def tickStrings(self, values, scale, spacing):
"""Customize strings of axis values."""
# Get channel-names
if self.mne.butterfly and self.mne.fig_selection is not None:
tick_strings = list(
self.weakmain()._make_butterfly_selections_dict())
elif self.mne.butterfly:
_, ixs, _ = np.intersect1d(DATA_CH_TYPES_ORDER,
self.mne.ch_types, return_indices=True)
ixs.sort()
tick_strings = np.array(DATA_CH_TYPES_ORDER)[ixs]
else:
# Get channel-names and by substracting 1 from tick-values
# since the first channel starts at y=1.
tick_strings = self.mne.ch_names[
self.mne.ch_order[[v - 1 for v in values]]]
return tick_strings
def drawPicture(self, p, axisSpec, tickSpecs, textSpecs):
"""Customize drawing of axis items."""
super().drawPicture(p, axisSpec, tickSpecs, textSpecs)
for rect, flags, text in textSpecs:
if self.mne.butterfly and self.mne.fig_selection is not None:
p.setPen(_get_color(
'black', self.mne.dark))
elif self.mne.butterfly:
p.setPen(_get_color(
self.mne.ch_color_dict[text], self.mne.dark))
elif text in self.mne.info['bads']:
p.setPen(_get_color(
self.mne.ch_color_bad, self.mne.dark))
else:
p.setPen(_get_color(
self.mne.ch_color_ref[text], self.mne.dark))
self.ch_texts[text] = ((rect.left(), rect.left() + rect.width()),
(rect.top(), rect.top() + rect.height()))
p.drawText(rect, int(flags), text)
def repaint(self):
"""Repaint Channel Axis."""
self.picture = None
self.update()
def mouseClickEvent(self, event):
"""Customize mouse click events."""
# Clean up channel-texts
if not self.mne.butterfly:
self.ch_texts = {k: v for k, v in self.ch_texts.items()
if k in [tr.ch_name for tr in self.mne.traces]}
# Get channel-name from position of channel-description
ypos = event.scenePos().y()
y_values = np.asarray(list(self.ch_texts.values()))[:, 1, :]
y_diff = np.abs(y_values - ypos)
ch_idx = int(np.argmin(y_diff, axis=0)[0])
ch_name = list(self.ch_texts.keys())[ch_idx]
trace = [tr for tr in self.mne.traces
if tr.ch_name == ch_name][0]
if event.button() == Qt.LeftButton:
trace.toggle_bad()
elif event.button() == Qt.RightButton:
self.weakmain()._create_ch_context_fig(trace.range_idx)
def get_labels(self):
"""Get labels for testing."""
values = self.tickValues(*self.mne.viewbox.viewRange()[1], None)
labels = self.tickStrings(values[0][1], None, None)
return labels
class BaseScrollBar(QScrollBar):
"""Base Class for scrolling directly to the clicked position."""
def __init__(self, parent=None):
super().__init__(parent)
def mousePressEvent(self, event):
"""Customize mouse click events.
Taken from: https://stackoverflow.com/questions/29710327/
how-to-override-qscrollbar-onclick-default-behaviour
"""
if event.button() == Qt.LeftButton:
opt = QStyleOptionSlider()
pos = _mouse_event_position(event)
# QPointF->QPoint for hitTestComplexControl
pos = QPoint(int(round(pos.x())), int(round(pos.y())))
self.initStyleOption(opt)
control = self.style().hitTestComplexControl(
QStyle.CC_ScrollBar, opt, pos, self)
if (control == QStyle.SC_ScrollBarAddPage or
control == QStyle.SC_ScrollBarSubPage):
# scroll here
gr = self.style().subControlRect(QStyle.CC_ScrollBar,
opt,
QStyle.SC_ScrollBarGroove,
self)
sr = self.style().subControlRect(QStyle.CC_ScrollBar,
opt,
QStyle.SC_ScrollBarSlider,
self)
if self.orientation() == Qt.Horizontal:
pos_ = pos.x()
sliderLength = sr.width()
sliderMin = gr.x()
sliderMax = gr.right() - sliderLength + 1
if (self.layoutDirection() == Qt.RightToLeft):
opt.upsideDown = not opt.upsideDown
else:
pos_ = pos.y()
sliderLength = sr.height()
sliderMin = gr.y()
sliderMax = gr.bottom() - sliderLength + 1
self.setValue(QStyle.sliderValueFromPosition(
self.minimum(), self.maximum(),
pos_ - sliderMin, sliderMax - sliderMin,
opt.upsideDown))
return
return super().mousePressEvent(event)
class TimeScrollBar(BaseScrollBar):
"""Scrolls through time."""
def __init__(self, mne):
super().__init__(Qt.Horizontal)
self.mne = mne
self.step_factor = 1
self.setMinimum(0)
self.setSingleStep(1)
self.update_duration()
self.setFocusPolicy(Qt.WheelFocus)
# Because valueChanged is needed (captures every input to scrollbar,
# not just sliderMoved), there has to be made a differentiation
# between internal and external changes.
self.external_change = False
self.valueChanged.connect(self._time_changed)
def _time_changed(self, value):
if not self.external_change:
if self.mne.is_epochs:
# Convert Epoch index to time
value = self.mne.boundary_times[int(value)]
else:
value /= self.step_factor
self.mne.plt.setXRange(value, value + self.mne.duration,
padding=0)
def update_value(self, value):
"""Update value of the ScrollBar."""
# Mark change as external to avoid setting
# XRange again in _time_changed.
self.external_change = True
if self.mne.is_epochs:
set_value = np.searchsorted(self.mne.midpoints, value)
else:
set_value = int(value * self.step_factor)
self.setValue(set_value)
self.external_change = False
def update_duration(self):
"""Update bar size."""
if self.mne.is_epochs:
self.setPageStep(self.mne.n_epochs)
self.setMaximum(len(self.mne.inst) - self.mne.n_epochs)
else:
self.setPageStep(int(self.mne.duration))
self.step_factor = self.mne.scroll_sensitivity / self.mne.duration
self.setMaximum(int((self.mne.xmax - self.mne.duration)
* self.step_factor))
def _update_scroll_sensitivity(self):
old_step_factor = self.step_factor
self.update_duration()
self.update_value(self.value() / old_step_factor)
def keyPressEvent(self, event):
"""Customize key press events."""
# Let main handle the keypress
event.ignore()
class ChannelScrollBar(BaseScrollBar):
"""Scrolls through channels."""
def __init__(self, mne):
super().__init__(Qt.Vertical)
self.mne = mne
self.setMinimum(0)
self.setSingleStep(1)
self.update_nchan()
self.setFocusPolicy(Qt.WheelFocus)
# Because valueChanged is needed (captures every input to scrollbar,
# not just sliderMoved), there has to be made a differentiation
# between internal and external changes.
self.external_change = False
self.valueChanged.connect(self._channel_changed)
def _channel_changed(self, value):
if not self.external_change:
if self.mne.fig_selection:
label = list(self.mne.ch_selections.keys())[value]
self.mne.fig_selection._chkbx_changed(label)
elif not self.mne.butterfly:
value = min(value, self.mne.ymax - self.mne.n_channels)
self.mne.plt.setYRange(value, value + self.mne.n_channels + 1,
padding=0)
def update_value(self, value):
"""Update value of the ScrollBar."""
# Mark change as external to avoid setting YRange again in
# _channel_changed.
self.external_change = True
self.setValue(value)
self.external_change = False
def update_nchan(self):
"""Update bar size."""
if getattr(self.mne, 'group_by', None) in ['position', 'selection']:
self.setPageStep(1)
self.setMaximum(len(self.mne.ch_selections) - 1)
else:
self.setPageStep(self.mne.n_channels)
self.setMaximum(self.mne.ymax - self.mne.n_channels - 1)
def keyPressEvent(self, event):
"""Customize key press events."""
# Let main handle the keypress
event.ignore()
class OverviewBar(QGraphicsView):
"""
Provides overview over channels and current visible range.
Has different modes:
- channels: Display channel-types
- zscore: Display channel-wise zscore across time
"""
def __init__(self, main):
self._scene = QGraphicsScene()
super().__init__(self._scene)
assert self.scene() is self._scene
self.weakmain = weakref.ref(main)
self.mne = main.mne
del main
self.bg_img = None
self.bg_pxmp = None
self.bg_pxmp_item = None
# Set minimum Size to 1/10 of display size
min_h = int(_screen_geometry(self).height() / 10)
self.setMinimumSize(1, 1)
self.setFixedHeight(min_h)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.set_background()
# Initialize Graphics-Items
# Bad channels
self.bad_line_dict = dict()
self.update_bad_channels()
# Events
self.event_line_dict = dict()
self.update_events()
if self.mne.is_epochs:
# Epochs Lines
self.epoch_line_dict = dict()
self.update_epoch_lines()
self.bad_epoch_rect_dict = dict()
self.update_bad_epochs()
else:
# Annotations
self.annotations_rect_dict = dict()
self.update_annotations()
# VLine
self.v_line = None
self.update_vline()
############################################
############### INITIALIZE fig.mne.segment_loc to zero.
############################################
############################################
#self.mne.segment_loc=0
#print('segment initialized')
# View Range
self.viewrange_rect = None
self.update_viewrange()
def update_epoch_lines(self):
"""Update representation of epoch lines."""
epoch_line_pen = self.mne.mkPen(color='k', width=1)
for t in self.mne.boundary_times[1:-1]:
top_left = self._mapFromData(t, 0)
bottom_right = self._mapFromData(t, len(self.mne.ch_order))
line = self.scene().addLine(QLineF(top_left, bottom_right),
epoch_line_pen)
line.setZValue(1)
self.epoch_line_dict[t] = line
def update_bad_channels(self):
"""Update representation of bad channels."""
bad_set = set(self.mne.info['bads'])
line_set = set(self.bad_line_dict.keys())
add_chs = bad_set.difference(line_set)
rm_chs = line_set.difference(bad_set)
for line_idx, ch_idx in enumerate(self.mne.ch_order):
ch_name = self.mne.ch_names[ch_idx]
if ch_name in add_chs:
start = self._mapFromData(0, line_idx)
stop = self._mapFromData(self.mne.inst.times[-1], line_idx)
pen = _get_color(self.mne.ch_color_bad, self.mne.dark)
line = self.scene().addLine(QLineF(start, stop), pen)
line.setZValue(2)
self.bad_line_dict[ch_name] = line
elif ch_name in rm_chs:
self.scene().removeItem(self.bad_line_dict[ch_name])
self.bad_line_dict.pop(ch_name)
def update_bad_epochs(self):
bad_set = set(self.mne.bad_epochs)
rect_set = set(self.bad_epoch_rect_dict.keys())
add_epos = bad_set.difference(rect_set)
rm_epos = rect_set.difference(bad_set)
for epo_num in self.mne.inst.selection:
if epo_num in add_epos:
epo_idx = self.mne.inst.selection.tolist().index(epo_num)
start, stop = self.mne.boundary_times[epo_idx:epo_idx + 2]
top_left = self._mapFromData(start, 0)
bottom_right = self._mapFromData(stop, len(self.mne.ch_order))
pen = _get_color(self.mne.epoch_color_bad, self.mne.dark)
rect = self.scene().addRect(QRectF(top_left, bottom_right),
pen=pen, brush=pen)
rect.setZValue(3)
self.bad_epoch_rect_dict[epo_num] = rect
elif epo_num in rm_epos:
self.scene().removeItem(self.bad_epoch_rect_dict[epo_num])
self.bad_epoch_rect_dict.pop(epo_num)
def update_events(self):
"""Update representation of events."""
if getattr(self.mne, 'event_nums', None) is not None \
and self.mne.events_visible:
for ev_t, ev_id in zip(self.mne.event_times, self.mne.event_nums):
color_name = self.mne.event_color_dict[ev_id]
color = _get_color(color_name, self.mne.dark)
color.setAlpha(100)
pen = self.mne.mkPen(color)
top_left = self._mapFromData(ev_t, 0)
bottom_right = self._mapFromData(ev_t, len(self.mne.ch_order))
line = self.scene().addLine(QLineF(top_left, bottom_right),
pen)
line.setZValue(1)
self.event_line_dict[ev_t] = line
else:
for event_line in self.event_line_dict.values():
self.scene().removeItem(event_line)
self.event_line_dict.clear()
def update_annotations(self):
"""Update representation of annotations."""
annotations = self.mne.inst.annotations
# Exclude non-visible annotations
annot_set = set([annot['onset'] for annot in annotations if
self.mne.visible_annotations[annot['description']]])
rect_set = set(self.annotations_rect_dict.keys())
add_onsets = annot_set.difference(rect_set)
rm_onsets = rect_set.difference(annot_set)
# Add missing onsets
for add_onset in add_onsets:
plot_onset = _sync_onset(self.mne.inst, add_onset)
annot_idx = np.argwhere(self.mne.inst.annotations.onset
== add_onset)[0][0]
duration = annotations.duration[annot_idx]
description = annotations.description[annot_idx]
color_name = self.mne.annotation_segment_colors[description]
color = _get_color(color_name, self.mne.dark)
color.setAlpha(150)
pen = self.mne.mkPen(color)
brush = mkBrush(color)
top_left = self._mapFromData(plot_onset, 0)
bottom_right = self._mapFromData(plot_onset + duration,
len(self.mne.ch_order))
rect = self.scene().addRect(QRectF(top_left, bottom_right),
pen, brush)
rect.setZValue(3)
self.annotations_rect_dict[add_onset] = {'rect': rect,
'plot_onset': plot_onset,
'duration': duration,
'color': color_name}
# Remove onsets
for rm_onset in rm_onsets:
self.scene().removeItem(self.annotations_rect_dict[rm_onset]
['rect'])
self.annotations_rect_dict.pop(rm_onset)
# Changes
for edit_onset in self.annotations_rect_dict:
plot_onset = _sync_onset(self.mne.inst, edit_onset)
annot_idx = np.where(annotations.onset == edit_onset)[0][0]
duration = annotations.duration[annot_idx]
rect_duration = self.annotations_rect_dict[edit_onset]['duration']
rect = self.annotations_rect_dict[edit_onset]['rect']
# Update changed duration
if duration != rect_duration:
self.annotations_rect_dict[edit_onset]['duration'] = duration
top_left = self._mapFromData(plot_onset, 0)
bottom_right = self._mapFromData(plot_onset + duration,
len(self.mne.ch_order))
rect.setRect(QRectF(top_left, bottom_right))
# Update changed color
description = annotations.description[annot_idx]
color_name = self.mne.annotation_segment_colors[description]
rect_color = self.annotations_rect_dict[edit_onset]['color']
if color_name != rect_color:
color = _get_color(color_name, self.mne.dark)
color.setAlpha(150)
pen = self.mne.mkPen(color)
brush = mkBrush(color)
rect.setPen(pen)
rect.setBrush(brush)
def update_vline(self):
"""Update representation of vline."""
if self.mne.is_epochs:
# VLine representation not useful in epochs-mode
pass
# Add VLine-Representation
elif self.mne.vline is not None:
value = self.mne.vline.value()
## self.mne.segment_loc=value
####################################
####################################
############## update eeg.fig.segment_loc