def __init__(self, frame):
Console.__init__(self)
# Register commands
commands = [
# File commands
('open', self.open, 'open EEGFILE [FMT]'),
('pwd', self.pwd, 'pwd'),
('cd', self.cd, 'cd DIR'),
('ls', self.ls, 'ls [DIR]'),
('onexit', self.onexit, 'onexit'),
# View commands
('focus', self.focus, 'focus [PANEL]'),
('show', self.show, 'show [PANEL [ACTION]]'),
('mode', self.mode, 'mode MODE'),
# Navigation commands
('time', self.time, 'time [TIMESTR]'),
('go', self.go, 'go [left [X] | right [X] | to TIME]'),
('scale', self.scale, 'scale [down|up|SCALE]'),
('zoom', self.zoom, 'zoom [in|out|SECONDS]'),
('reset', self.reset, 'reset'),
# For development
('profile', self.profile, 'profile'),
]
for cmdname, func, usage in commands:
self.add_command(cmdname, func, usage)
# Initialise data used below
self.display = Display(frame)
self.eegfile = None
class ViewerConsole(Console):
"""Extends Console to provide directory exploration"""
# Page widths in seconds
PAGE_WIDTHS = [
0.1, 0.2, 0.5,
1, 2, 5,
10, 20, 50,
100, 200, 500,
1000, 2000, 5000,
10000, 20000, 100000
]
# Scales in EEG file dimension (hopefully uV)
SCALES = [
1, 2, 5,
10, 20, 50,
100, 200, 500,
1000, 2000, 5000,
10000, 20000, 100000
]
def __init__(self, frame):
Console.__init__(self)
# Register commands
commands = [
# File commands
('open', self.open, 'open EEGFILE [FMT]'),
('pwd', self.pwd, 'pwd'),
('cd', self.cd, 'cd DIR'),
('ls', self.ls, 'ls [DIR]'),
('onexit', self.onexit, 'onexit'),
# View commands
('focus', self.focus, 'focus [PANEL]'),
('show', self.show, 'show [PANEL [ACTION]]'),
('mode', self.mode, 'mode MODE'),
# Navigation commands
('time', self.time, 'time [TIMESTR]'),
('go', self.go, 'go [left [X] | right [X] | to TIME]'),
('scale', self.scale, 'scale [down|up|SCALE]'),
('zoom', self.zoom, 'zoom [in|out|SECONDS]'),
('reset', self.reset, 'reset'),
# For development
('profile', self.profile, 'profile'),
]
for cmdname, func, usage in commands:
self.add_command(cmdname, func, usage)
# Initialise data used below
self.display = Display(frame)
self.eegfile = None
# Commands provided by ViewerConsole
def open(self, eegname=None, fmt=None):
"""Open EEG file for viewing
open EEGFILE: open file EEGFILE base on extension
open EEGFILE FMT: open EEGFILE as FMT typ EEG file
Type 'formats' to list supported formats.
"""
# Open EEG file
if eegname is None:
if fmt is None:
fmt = 'edf'
newfile = openeeg(sys.stdin, mode='r', fmt=fmt, cached=True)
else:
if not os.path.exists(eegname):
raise ConsoleError("file '{0}' does not exist".format(eegname))
newfile = openeeg(eegname, mode='r', fmt=fmt)
# Close previous file and keep new
if self.eegfile:
self.eegfile.close()
self.eegfile = newfile
# Update display
self.display.set_eegfile(newfile)
self.display.redraw()
yield "file '{0}' opened.\n".format(newfile.name)
def pwd(self):
"""Display the current working directory"""
yield os.getcwd() + '\n'
def cd(self, newdir):
"""Change the working directory"""
if newdir == '-':
if not hasattr(self, '_olddir'):
raise ConsoleError('No previous directory')
newdir = self._olddir
yield 'cd {0}\n'.format(newdir)
if not os.path.exists(newdir):
raise ConsoleError("The path '{0}' does not exist".format(newdir))
if not os.path.isdir(newdir):
raise ConsoleError("The path '{0}' is not a directory".format(newdir))
self._olddir = os.getcwd()
os.chdir(newdir)
yield os.getcwd() + '\n'
def ls(self, path=None):
if path is None:
path = os.getcwd()
yield ', '.join(path for path in os.listdir(path)) + '\n'
def onexit(self):
"""Quit the program"""
frame = self.display.frame
if hasattr(frame,'_cursor_file') and frame._cursor_file:
frame.SaveCursors(frame._cursor_file)
yield
# ::::::::::::::::::::: view :::::::::::::::::::::::::::::::::::::::::
def _check_panel(self, panelname):
if panelname not in self.display.panel_names():
msg = "Unrecognised panel '{0}'. type 'panels' to list"
raise ConsoleError(msg.format(panelname))
def focus(self, panelname=None):
"""Set keyboard focus to PANEL e.g.:
focus: list panels that can be focussed
focus PANEL: set focus to PANEL
"""
if panelname is None:
yield ', '.join(sorted(self.display.panel_names())) + '\n'
return
self._check_panel(panelname)
self.display.focus_panel(panelname)
yield
def show(self, panelname=None, action='toggle'):
"""Toggle showing PANEL e.g.:
show: list showable panels
show PANEL: toggle showing PANEL
show PANEL [toggle|on|off|query]: toggle, set on/off, or print
\\the show status of PANEL
"""
if panelname is None:
yield ', '.join(sorted(self.display.panel_names())) + '\n'
return
action = action.lower()
self._check_panel(panelname)
showing = self.display.panel_showing(panelname)
if action == 'toggle':
showing = not showing
elif action == 'on':
showing = True
elif action == 'off':
showing = False
elif action == 'query':
words = {True:'on', False:'off'}
msg = "panel '{0}' showing status is '{1}'"
yield msg.format(panelname, words[showing])
return
else:
raise ConsoleError("Unrecognised action")
# Now communicate action to panel
self.display.show_panel(panelname, showing)
def mode(self, mode):
"""Set the graphics mode to MODE
mode [gl|mpl]: set the graphics mode to gl/mpl
"""
try:
self.display.set_graphics_mode(mode)
except ImportError:
raise ConsoleError("Mode unavailable")
except ValueError:
raise ConsoleError("Unrecognised mode")
self.display.redraw()
yield
# ::::::::::::::::::::: navigation :::::::::::::::::::::::::::::::::::::::
def reset(self):
"""Restore default view
reset: restore default view"""
self.display.reset()
self.display.redraw()
yield
def time(self, timestr=None):
"""Print the time of the current EEG view or interpretation of the
\\time string: timestr e.g.:
time: print time of left edge of current view.
time TIMESTR: print full date and time corresponding to TIMESTR in the
\\context of the current EEG file.
TIMESTR should be a string of the form [DATE-]TIME where
\\DATE is of the form 'dd/MM[/[YY]YY]' and
\\TIME is of the form 'HH:mm[:ss[.ssss]]' (seconds can be non-whole
\\number in decimal notation).
"""
if not self.eegfile:
raise ConsoleError("No EEG file open")
if timestr is None:
t1, t2 = self.display.get_xlim()
t = self.eegfile.as_datetime(t1)
yield 'Display time is:\n'
else:
t = parse_time_string(timestr, self.eegfile.tstart)
yield 'Time string interpreted as:\n'
yield '{0}\n'.format(t)
def go(self, flag=None, arg=None):
"""Query or set the viewed time within the EEG file.
go: display the time of the left edge of the screen
go left: go left by 1 screen width
go right: go right by 1 screen width
go left X: go left by X screen widths
go right X: go right by X screen widths
go to TIMESTR: go to time specified by TIMESTR
Type 'help time' for information on specifying times."""
# Get start time and screen width
t1, t2 = self.display.get_xlim()
t, w = t1, t2 - t1
if flag is not None:
# Apply default value for arg and check command
if arg is None:
if flag in ('left', 'right'):
arg = 1
elif flag == 'to':
raise ConsoleError("need to specify time with 'go to'")
else:
raise ConsoleError("unknown command: '{0}'".format(flag))
# Now run appropriate command
if flag == 'left':
t -= w * make_int(parse_float(arg))
elif flag == 'right':
t += w * make_int(parse_float(arg))
elif flag == 'to':
dt = parse_time_string(arg, self.eegfile.tstart)
t = self.eegfile.as_seconds(dt)
# Apply the new time
t1, t2 = self._force_bounds((t, t + w), _errors=True)
self.display.set_xlim((t1, t2))
self.display.redraw()
dt = self.eegfile.as_datetime(t1)
yield "Current time is {0}\n".format(dt)
def zoom(self, seconds=None):
"""Query or set the width of the EEG view in seconds
zoom: display the current page width value
zoom SECONDS: set the page width to SECONDS seconds
zoom in: set the page width one level smaller
zoom out: set the page width one level larger"""
t1, t2 = self.display.get_xlim()
t, w = t1, t2 - t1
if seconds is not None:
if seconds == 'in':
w = find_next_smaller(w, self.PAGE_WIDTHS)
elif seconds =='out':
w = find_next_bigger(w, self.PAGE_WIDTHS)
else:
w = make_int(parse_float(seconds))
t1, t2 = self._force_bounds((t, t + w), _errors=True)
self.display.set_xlim((t1, t2))
self.display.redraw()
yield "Screen width is {0} seconds\n".format(make_int(t2 - t1))
def scale(self, scale=None):
"""Query or set the vertical EEG scale.
scale: display current scale value
scale SCALE: set the scale to SCALE"""
s = self.display.get_scale()
if scale is not None:
if scale == 'down':
s = find_next_smaller(s, self.SCALES)
elif scale == 'up':
s = find_next_bigger(s, self.SCALES)
else:
s = make_int(parse_float(level))
self.display.set_scale(s)
self.display.redraw()
yield "Display scale is {0} signal units\n".format(s)
def profile(self, panby):
"""Test the graphics performance by continuously panning the
\\display
profile: pan continuously"""
while True:
tlims = self.display.get_xlim()
for n in self.go('right', panby):
yield ''
self.display.frame.eegpanel.canvas.Update()
if self.display.get_xlim() == tlims:
break
yield 'done\n'
def _force_bounds(self, newxlim, _errors):
"""Adjust inner limits to fit into the outer limits"""
oldxlim = self.display.get_xlim()
x1, x2 = newxlim
xmin, xmax = self.display.outer_limits
if x2 - x1 > xmax - xmin:
newxlim = xmin, xmax
self._check(newxlim, _errors, "Already showing whole file")
elif x1 < xmin:
delta = xmin - x1
newxlim = x1 + delta, x2 + delta
self._check(newxlim, _errors, "Already at beginning of file")
elif x2 > xmax:
delta = x2 - xmax
newxlim = x1 - delta, x2 - delta
self._check(newxlim, _errors, "Already at end of file")
else:
newxlim = x1, x2
return newxlim
def _check(self, newxlim, _errors, msg):
if _errors and newxlim == self.display.get_xlim():
raise ConsoleError(msg)
def _interactive_pan(self, seconds):
"""Pan the view by ammount seconds.
This function is the handler for interactive panning using the mouse"""
t1, t2 = self.display.get_xlim()
xlim = self._force_bounds((t1 + seconds, t2 + seconds), _errors=False)
self.display.set_xlim(xlim)
self.display.redraw()
def _interactive_zoom(self, xlim, yfactor):
"""Pan the view by ammount seconds.
This function is the handler for interactive panning using the mouse"""
# Compute new scale
xlim = self._force_bounds(xlim, _errors=False)
self.display.set_xlim(xlim)
self.display.set_scale(self.display.get_scale() / float(yfactor))
self.display.redraw()
