Update orientation API to match UI

CHANGES.rst

@@ -36,6 +36,9 @@ Imviz
 
 - Added Gaia catalog to Catalog plugin. [#3090]
 
+- Updated ``link_type`` to ``align_by`` and ``wcs_use_affine`` to ``fast_approximation`` in
+  Orientation plugin API to better match UI text. [#3128]
+
 Mosviz
 ^^^^^^
 

jdaviz/app.py

@@ -325,9 +325,9 @@ def __init__(self, configuration=None, *args, **kwargs):
         self.auto_link = kwargs.pop('auto_link', True)
 
         # Imviz linking
-        self._link_type = 'pixels'
+        self._align_by = 'pixels'
         if self.config == "imviz":
-            self._wcs_use_affine = None
+            self._fast_approximation = None
 
         # Subscribe to messages indicating that a new viewer needs to be
         #  created. When received, information is passed to the application
@@ -1938,7 +1938,7 @@ def _reparent_subsets(self, old_parent, new_parent=None):
 
                     # Translate bounds through WCS if needed
                     if (self.config == "imviz" and
-                            self._jdaviz_helper.plugins["Orientation"].link_type == "WCS"):
+                            self._jdaviz_helper.plugins["Orientation"].align_by == "WCS"):
 
                         # Default shape for WCS-only layers is 10x10, but it doesn't really matter
                         # since we only need the angles.
@@ -2219,7 +2219,7 @@ def vue_data_item_remove(self, event):
 
         # Make sure the data isn't loaded in any viewers and isn't the selected orientation
         for viewer_id, viewer in self._viewer_store.items():
-            if orientation_plugin is not None and self._link_type == 'wcs':
+            if orientation_plugin is not None and self._align_by == 'wcs':
                 if viewer.state.reference_data.label == data_label:
                     self._change_reference_data(base_wcs_layer_label, viewer_id)
             self.remove_data_from_viewer(viewer_id, data_label)
@@ -2506,12 +2506,12 @@ def _on_new_viewer(self, msg, vid=None, name=None, add_layers_to_viewer=False,
             msg.cls, data=msg.data, show=False)
         viewer.figure_widget.layout.height = '100%'
 
-        linked_by_wcs = self._link_type == 'wcs'
+        linked_by_wcs = self._align_by == 'wcs'
 
         if hasattr(viewer.state, 'linked_by_wcs'):
             orientation_plugin = self._jdaviz_helper.plugins.get('Orientation', None)
             if orientation_plugin is not None:
-                linked_by_wcs = orientation_plugin.link_type.selected == 'WCS'
+                linked_by_wcs = orientation_plugin.align_by.selected == 'WCS'
             elif len(self._viewer_store) and hasattr(self._jdaviz_helper, 'default_viewer'):
                 # The plugin would only not exist for instances of Imviz where the user has
                 # intentionally removed the Orientation plugin, but in that case we will

jdaviz/configs/default/plugins/export/export.py

@@ -728,12 +728,12 @@ def save_subset_as_region(self, selected_subset_label, filename):
         """
 
         # type of region saved depends on link type
-        link_type = getattr(self.app, '_link_type', None)
+        align_by = getattr(self.app, '_align_by', None)
 
         region = self.app.get_subsets(subset_name=selected_subset_label,
-                                      include_sky_region=link_type == 'wcs')
+                                      include_sky_region=align_by == 'wcs')
 
-        region = region[0][f'{"sky_" if link_type == "wcs" else ""}region']
+        region = region[0][f'{"sky_" if align_by == "wcs" else ""}region']
 
         region.write(str(filename), overwrite=True)
 

jdaviz/configs/default/plugins/export/tests/test_export.py

@@ -105,7 +105,7 @@ def test_export_subsets_wcs(self, imviz_helper, spectral_cube_wcs):
         imviz_helper.load_data(data)  # load data twice so we can link them
         imviz_helper.load_data(data)
 
-        imviz_helper.link_data(link_type='wcs')
+        imviz_helper.link_data(align_by='wcs')
 
         imviz_helper.app.get_viewer('imviz-0').apply_roi(CircularROI(xc=8,
                                                                      yc=6,

jdaviz/configs/default/plugins/markers/markers.py

@@ -129,7 +129,7 @@
         orig_world_x = np.asarray(self.table._qtable['world_ra'][in_viewer])
         orig_world_y = np.asarray(self.table._qtable['world_dec'][in_viewer])
 
-        if self.app._link_type.lower() == 'wcs':
+        if self.app._align_by.lower() == 'wcs':
             # convert from the sky coordinates in the table to pixels via the WCS of the current
             # reference data
             new_wcs = viewer.state.reference_data.coords
@@ -139,7 +139,7 @@
             except Exception:
                 # fail gracefully
                 new_x, new_y = [], []
-        elif self.app._link_type == 'pixels':
+        elif self.app._align_by == 'pixels':
             # we need to convert based on the WCS of the individual data layers on which each mark
             # was first created
             new_x, new_y = np.zeros_like(orig_world_x), np.zeros_like(orig_world_y)
@@ -156,7 +156,7 @@
                     new_x, new_y = [], []
                     break
         else:
-            raise NotImplementedError(f"link_type {self.app._link_type} not implemented")
+            raise NotImplementedError(f"align_by {self.app._align_by} not implemented")
 
         # check for entries that do not correspond to a layer or only have pixel coordinates
         pixel_only_inds = data_labels == ''

jdaviz/configs/default/plugins/plot_options/plot_options.py

@@ -741,7 +741,7 @@ def _on_global_display_unit_changed(self, *args):
         self.send_state('display_units')
 
     def _on_refdata_change(self, *args):
-        if self.app._link_type.lower() == 'wcs':
+        if self.app._align_by.lower() == 'wcs':
             self.display_units['image'] = 'deg'
         else:
             self.display_units['image'] = 'pix'

jdaviz/configs/default/plugins/subset_plugin/subset_plugin.py

@@ -90,8 +90,8 @@ def __init__(self, *args, **kwargs):
         self.subset_states = []
         self.spectral_display_unit = None
 
-        link_type = getattr(self.app, '_link_type', None)
-        self.display_sky_coordinates = (link_type == 'wcs' and not self.multiselect)
+        align_by = getattr(self.app, '_align_by', None)
+        self.display_sky_coordinates = (align_by == 'wcs' and not self.multiselect)
 
     def _on_link_update(self, *args):
         """When linking is changed pixels<>wcs, change display units of the
@@ -100,8 +100,8 @@ def _on_link_update(self, *args):
         to the UI upon link change by calling _get_subset_definition, which
         will re-determine how to display subset information."""
 
-        link_type = getattr(self.app, '_link_type', None)
-        self.display_sky_coordinates = (link_type == 'wcs')
+        align_by = getattr(self.app, '_align_by', None)
+        self.display_sky_coordinates = (align_by == 'wcs')
 
         if self.subset_selected != self.subset_select.default_text:
             self._get_subset_definition(*args)

jdaviz/configs/default/plugins/subset_plugin/tests/test_subset_plugin.py

@@ -138,7 +138,7 @@ def test_circle_recenter_linking(roi_class, subset_info, imviz_helper, image_2d_
     # remove subsets and change link type to wcs
     dc = imviz_helper.app.data_collection
     dc.remove_subset_group(dc.subset_groups[0])
-    imviz_helper.link_data(link_type='wcs')
+    imviz_helper.link_data(align_by='wcs')
     assert plugin.display_sky_coordinates  # linking change should trigger change to True
 
     # apply original subset. transform sky coord of original subset to new pixels

jdaviz/configs/imviz/helper.py

@@ -3,6 +3,7 @@
 import warnings
 from copy import deepcopy
 
+from astropy.utils import deprecated
 import numpy as np
 from glue.core.link_helpers import LinkSame
 
@@ -190,7 +191,7 @@
             show_in_viewer = f"{self.app.config}-0"
 
         if show_in_viewer:
-            linked_by_wcs = self.app._link_type == 'wcs'
+            linked_by_wcs = self.app._align_by == 'wcs'
             if linked_by_wcs:
                 for applied_label, visible, is_wcs_only, has_wcs in zip(
                         applied_labels, applied_visible, layer_is_wcs_only, layer_has_wcs
@@ -211,7 +212,7 @@
         else:
             if 'Orientation' not in self.plugins.keys():
                 # otherwise plugin will handle linking automatically with DataCollectionAddMessage
-                self.link_data(link_type='wcs')
+                self.link_data(align_by='wcs')
 
             # One input might load into multiple Data objects.
             # NOTE: If the batch_load context manager was used, it will
@@ -223,35 +224,39 @@
                     if (has_wcs and linked_by_wcs) or not linked_by_wcs:
                         self.app.add_data_to_viewer(show_in_viewer, applied_label, visible=visible)
 
-    def link_data(self, link_type='pixels', wcs_fallback_scheme=None, wcs_use_affine=True):
+    def link_data(self, align_by='pixels', wcs_fallback_scheme=None, fast_approximation=True):
         """(Re)link loaded data in Imviz with the desired link type.
         All existing links will be replaced.
 
         Parameters
         ----------
-        link_type : {'pixels', 'wcs'}
+        align_by : {'pixels', 'wcs'}
             Choose to link by pixels or WCS.
 
         wcs_fallback_scheme : {None, 'pixels'}
             If WCS linking failed, choose to fall back to linking by pixels or not at all.
-            This is only used when ``link_type='wcs'``.
+            This is only used when ``align_by='wcs'``.
             Choosing `None` may result in some Imviz functionality not working properly.
 
-        wcs_use_affine : bool
+        fast_approximation : bool
             Use an affine transform to represent the offset between images if possible
             (requires that the approximation is accurate to within 1 pixel with the
             full WCS transformations). If approximation fails, it will automatically
-            fall back to full WCS transformation. This is only used when ``link_type='wcs'``.
+            fall back to full WCS transformation. This is only used when ``align_by='wcs'``.
             Affine approximation is much more performant at the cost of accuracy.
 
         """
-        from jdaviz.configs.imviz.plugins.orientation.orientation import link_type_msg_to_trait
+        from jdaviz.configs.imviz.plugins.orientation.orientation import align_by_msg_to_trait
         plg = self.plugins["Orientation"]
         plg._obj.wcs_use_fallback = wcs_fallback_scheme == 'pixels'
-        plg.wcs_use_affine = wcs_use_affine
-        plg.link_type = link_type_msg_to_trait[link_type]
+        plg.fast_approximation = fast_approximation
+        plg.align_by = align_by_msg_to_trait[align_by]
 
+    @deprecated(since="4.0", alternative="get_alignment_method")
     def get_link_type(self, data_label_1, data_label_2):
+        return self.get_alignment_method(data_label_1, data_label_2)
+
+    def get_alignment_method(self, data_label_1, data_label_2):
         """Find the type of ``glue`` linking between the given
         data labels. A link is bi-directional. If there are
         more than 2 data in the collection, one of the given
@@ -264,7 +269,7 @@
 
         Returns
         -------
-        link_type : {'pixels', 'wcs', 'self'}
+        align_by : {'pixels', 'wcs', 'self'}
             One of the link types accepted by the Orientation plugin
             or ``'self'`` if the labels are identical.
 
@@ -277,23 +282,23 @@
         if data_label_1 == data_label_2:
             return "self"
 
-        link_type = None
+        align_by = None
         for elink in self.app.data_collection.external_links:
             elink_labels = (elink.data1.label, elink.data2.label)
             if data_label_1 in elink_labels and data_label_2 in elink_labels:
                 if isinstance(elink, LinkSame):  # Assumes WCS link never uses LinkSame
-                    link_type = 'pixels'
+                    align_by = 'pixels'
                 else:  # If not pixels, must be WCS
-                    link_type = 'wcs'
+                    align_by = 'wcs'
                 break  # Might have duplicate, just grab first match
 
-        if link_type is None:
+        if align_by is None:
             avail_links = [f"({elink.data1.label}, {elink.data2.label})"
                            for elink in self.app.data_collection.external_links]
             raise ValueError(f'{data_label_1} and {data_label_2} combo not found '
                              f'in data collection external links: {avail_links}')
 
-        return link_type
+        return align_by
 
     def get_aperture_photometry_results(self):
         """Return aperture photometry results, if any.

jdaviz/configs/imviz/plugins/footprints/footprints.py

@@ -180,7 +180,7 @@ def _ensure_sky(region):
         return '', {path: region}
 
     def _on_link_type_updated(self, msg=None):
-        self.is_pixel_linked = (getattr(self.app, '_link_type', None) == 'pixels' and
+        self.is_pixel_linked = (getattr(self.app, '_align_by', None) == 'pixels' and
                                 len(self.app.data_collection) > 1)
         # toggle visibility as necessary
         self._on_is_active_changed()
@@ -193,10 +193,10 @@ def _on_link_type_updated(self, msg=None):
                 self._change_overlay(overlay_selected=choice, center_the_overlay=False)
 
     def vue_link_by_wcs(self, *args):
-        # call other plugin so that other options (wcs_use_affine, wcs_use_fallback)
+        # call other plugin so that other options (fast_approximation, wcs_use_fallback)
         # are retained.  Remove this method if support for plotting footprints
         # when pixel-linked is reintroduced.
-        self.app._jdaviz_helper.plugins['Orientation'].link_type = 'WCS'
+        self.app._jdaviz_helper.plugins['Orientation'].align_by = 'WCS'
 
     def _ensure_first_overlay(self):
         if not len(self._overlays):