from astropy.io.fits import getheader
from astropy.utils import deprecated
import astropy.units as u
import ipyvue
import os
from lightkurve import LightCurve
from glue.config import settings as glue_settings
from glue.core.link_helpers import LinkSame
from glue.core.units import unit_converter
from jdaviz.core.helpers import ConfigHelper
from lcviz import __version__
from lcviz.viewers import TimeScatterView
__all__ = ['LCviz']
@unit_converter('custom-lcviz')
class UnitConverter:
def equivalent_units(self, data, cid, units):
return set(list(map(str, u.Unit(units).find_equivalent_units(include_prefix_units=True))))
def to_unit(self, data, cid, values, original_units, target_units):
# for some reason, glue is trying to request a change for cid='flux' from d to electron / s
if target_units not in self.equivalent_units(data, cid, original_units):
return values
return (values * u.Unit(original_units)).to_value(u.Unit(target_units))
glue_settings.UNIT_CONVERTER = 'custom-lcviz'
custom_components = {'plugin-ephemeris-select': 'components/plugin_ephemeris_select.vue'}
# Register pure vue component. This allows us to do recursive component instantiation only in the
# vue component file
for name, path in custom_components.items():
ipyvue.register_component_from_file(None, name,
os.path.join(os.path.dirname(__file__), path))
def _get_range_subset_bounds(self, subset_state, *args, **kwargs):
viewer = self._jdaviz_helper.default_time_viewer._obj
light_curve = viewer.data()[0]
reference_time = light_curve.meta['reference_time']
if viewer:
# TODO: use display units once implemented in Glue for ScatterViewer
# units = u.Unit(viewer.state.x_display_unit)
units = u.Unit(viewer.time_unit)
else: # pragma: no cover
raise ValueError("Unable to find time axis units")
region = reference_time + u.Quantity([subset_state.lo * units, subset_state.hi * units])
return [{"name": subset_state.__class__.__name__,
"glue_state": subset_state.__class__.__name__,
"region": region,
"subset_state": subset_state}]
def _link_new_data(app, reference_data=None, data_to_be_linked=None):
dc = app.data_collection
ref_data = dc[reference_data] if reference_data else dc[0]
linked_data = dc[data_to_be_linked] if data_to_be_linked else dc[-1]
new_link = LinkSame(
cid1=ref_data.world_component_ids[0],
cid2=linked_data.world_component_ids[0],
data1=ref_data,
data2=linked_data,
labels1=ref_data.label,
labels2=linked_data.label
)
dc.add_link(new_link)
return
def _get_display_unit(app, axis):
if app._jdaviz_helper is None or app._jdaviz_helper.plugins.get('Unit Conversion') is None: # noqa
# fallback on native units (unit conversion is not enabled)
if axis == 'time':
return u.d
elif axis == 'flux':
return app._jdaviz_helper.default_time_viewer._obj.data()[0].flux.unit
else:
raise ValueError(f"could not find units for axis='{axis}'")
try:
# TODO: need to implement and add unit conversion plugin for this to be able to work
return getattr(app._jdaviz_helper.plugins.get('Unit Conversion')._obj,
f'{axis}_unit_selected')
except AttributeError:
raise ValueError(f"could not find display unit for axis='{axis}'")
[docs]
class LCviz(ConfigHelper):
_default_configuration = {
'settings': {'configuration': 'lcviz',
'visible': {'menu_bar': False,
'toolbar': True,
'tray': True,
'tab_headers': True},
'dense_toolbar': False,
'context': {'notebook': {'max_height': '600px'}}},
'toolbar': ['g-data-tools', 'g-subset-tools', 'g-viewer-creator', 'g-coords-info'],
'tray': ['g-metadata-viewer', 'flux-column',
'plot-options', 'g-subset-tools',
'g-markers', 'time-selector',
'stitch', 'flatten', 'frequency-analysis', 'ephemeris',
'binning', 'export', 'logger'],
'viewer_area': [{'container': 'col'}]}
_component_ids = {}
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# override jdaviz behavior to support temporal subsets
self.app._get_range_subset_bounds = (
lambda *args, **kwargs: _get_range_subset_bounds(self.app, *args, **kwargs)
)
self.app._link_new_data = (
lambda *args, **kwargs: _link_new_data(self.app, *args, **kwargs)
)
self.app._get_display_unit = (
lambda *args, **kwargs: _get_display_unit(self.app, *args, **kwargs)
)
# inject custom css from lcviz_style.vue (on top of jdaviz styles)
self.app._add_style((__file__, 'lcviz_style.vue'))
# enable loaders (currently requires dev-flag in jdaviz)
self.app.state.dev_loaders = True
self.load = self._load
# set the link to read the docs
self.app.vdocs = 'latest' if 'dev' in __version__ else 'v'+__version__
self.app.docs_link = f"https://lcviz.readthedocs.io/en/{self.app.vdocs}"
for plugin in self.plugins.values():
# NOTE that plugins that need to override upstream docs_link should do so in
# an @observe('vdocs') rather than the init, since plugin instances have
# already been initialized
plugin._obj.vdocs = self.app.vdocs
[docs]
@deprecated(since="1.2", alternative="load")
def load_data(self, data, data_label=None, extname=None):
"""
Load data into LCviz.
Parameters
----------
data : obj or str
File name or object to be loaded. Supported formats include:
* ``'filename.fits'`` (or any extension that ``astropy.io.fits``
supports)
* `~lightkurve.LightCurve` (extracts the default flux column)
data_label : str or `None`
Data label to go with the given data. If not given, this is
automatically determined from filename or randomly generated.
The final label shown in LCviz may have additional information
appended for clarity.
extname : str or `None`
Used for DVT parsing if only a single TCE from a multi-TCE file should be
loaded. Formatted as 'TCE_1', 'TCE_2', etc.
"""
kwargs = {}
# Determine if we're loading a DVT file, which has a separate parser
if isinstance(data, str):
header = getheader(data)
if (header.get('TELESCOP', '') == 'TESS' and 'CREATOR' in header and
'DvTimeSeriesExporter' in header['CREATOR']):
kwargs['extension'] = extname
self.load(data, data_label=data_label, **kwargs)
[docs]
def get_data(self, data_label=None, cls=LightCurve, subset=None):
"""
Returns data with name equal to data_label of type cls with subsets applied from
subset_to_apply.
Parameters
----------
data_label : str, optional
Provide a label to retrieve a specific data set from data_collection.
cls : light curve class, optional
The type that data will be returned as.
subset : str, optional
Subset that is to be applied (as a mask) to the data before it is returned.
Returns
-------
data : cls
Data is returned as type cls with subsets applied.
"""
return super()._get_data(data_label=data_label, mask_subset=subset, cls=cls)
@property
def default_time_viewer(self):
tvs = [viewer for vid, viewer in self.app._viewer_store.items()
if isinstance(viewer, TimeScatterView)]
if not len(tvs):
raise ValueError("no time viewers exist")
return tvs[0].user_api
@property
def _has_cube_data(self):
for data in self.app.data_collection:
if data.ndim == 3:
return True
return False
@property
def _tray_tools(self):
"""
Access API objects for plugins in the app toolbar.
Returns
-------
plugins : dict
dict of plugin objects
"""
# TODO: provide user-friendly labels, user API, and move upstream to be public
# for now this is just useful for dev-debugging access to toolbar entries
from ipywidgets.widgets import widget_serialization
return {item['name']: widget_serialization['from_json'](item['widget'], None)
for item in self.app.state.tool_items}
