row select

jdaviz/configs/imviz/tests/test_catalogs.py

@@ -392,3 +392,47 @@ def test_offline_ecsv_catalog_with_extra_columns(imviz_helper, image_2d_wcs, tmp
         assert item['is_extended'] == tbl['is_extended'][idx]
         assert float(item['roundness']) == tbl['roundness'][idx]
         assert float(item['sharpness']) == tbl['sharpness'][idx]
+
+
+def test_select_catalog_table_rows(imviz_helper, image_2d_wcs, tmp_path):
+
+    """Test the ``select_rows`` functionality on table in plugin."""
+
+    arr = np.ones((500, 500))
+    ndd = NDData(arr, wcs=image_2d_wcs)
+    imviz_helper.load_data(ndd)
+
+    # write out table to load back in
+    # NOTE: if we ever support loading Table obj directly, replace this and
+    # remove tmp_path
+    sky_coord = SkyCoord(ra=[337.49056532, 337.46086081, 337.46586081,
+                             337.46786081, 337.47586081, 337.47686081],
+                         dec=[-20.80555273, -20.7777673, -20.7877673,
+                              -20.7877673, -20.7877673, -20.7877673], unit='deg')
+    tbl = Table({'sky_centroid': [sky_coord],
+                'label': ['Source_1', 'Source_2', 'Source_3', 'Source_4',
+                          'Source_5', 'Source_6']})
+    tbl_file = str(tmp_path / 'test_catalog.ecsv')
+    tbl.write(tbl_file, overwrite=True)
+
+    catalogs_plugin = imviz_helper.plugins['Catalog Search']
+    plugin_table = catalogs_plugin._obj.table
+
+    # load catalog
+    catalogs_plugin._obj.from_file = tbl_file
+    catalogs_plugin._obj.search()
+
+    # select a single row:
+    plugin_table.select_rows(3)
+    assert len(plugin_table.selected_rows) == 1
+    assert plugin_table.selected_rows[0]['Right Ascension (degrees)'] == '337.46786'
+
+    # select multiple rows by indices
+    # plugin_table.select_rows([1, 2, 4])
+
+    # select a range of rows:
+    plugin_table.select_rows(slice(0, 3))
+    assert len(plugin_table.selected_rows) == 3
+
+    # select rows with multi dim numpy slice
+    # plugin_table.select_rows(np.s_[0:2, 3:4])

jdaviz/core/template_mixin.py

@@ -4829,6 +4829,48 @@ def clear_table(self):
         self._qtable = None
         self._plugin.session.hub.broadcast(PluginTableModifiedMessage(sender=self))
 
+    def select_rows(self, rows):
+        """
+        Select rows from the current table by index, indices, or slice.
+
+        This method first clears the currently selected rows by resetting 
+        `self.selected_rows` to an empty list. The rows specified by the input
+        `rows` are then applied as the new selection.
+
+        Parameters
+        ----------
+        rows : int, list of int, slice, or tuple of slice
+            The rows to select. This can be:
+            - An integer specifying a single row index.
+            - A list of integers specifying multiple row indices.
+            - A slice object specifying a range of rows.
+            - A tuple of slices (e.g using np.s_)
+
+        """
+
+        if isinstance(rows, tuple):
+            # if 'rows' are a numpy slice, then it could be
+            # a tuple of slices.
+            if isinstance(rows[0], slice):
+                selected = []
+                for sl in rows:
+                    selected.append(self.items[rows][0])
+            else:
+                selected = self.items[rows]
+
+
+        elif isinstance(rows, (slice, list)):
+            selected = self.items[rows]
+        elif isinstance(rows, int):
+            selected = [self.items[rows]]
+
+        # first, deselect to revert current selection
+        self.selected_rows = []
+
+        # then apply current new selection
+        self.selected_rows = selected
+
+
     def vue_clear_table(self, data=None):
         # if the plugin (or via the TableMixin) has its own clear_table implementation,
         # call that, otherwise call the one defined here