Fixed HoloViews axis linking across Template roots (#980)

panel/io/server.py

@@ -37,9 +37,12 @@ def _server_url(url, port):
         return 'http://%s:%d%s' % (url.split(':')[0], port, "/")
 
 def _eval_panel(panel, server_id, title, doc):
+    from ..template import Template
     from ..pane import panel as as_panel
 
-    if isinstance(panel, FunctionType):
+    if isinstance(panel, Template):
+        return panel._modify_doc(server_id, title, doc)
+    elif isinstance(panel, FunctionType):
         panel = panel()
     return as_panel(panel)._modify_doc(server_id, title, doc)
 

panel/pane/holoviews.py

@@ -535,11 +535,11 @@ def link_axes(root_view, root_model):
 
             fig = p.state
             if fig.x_range.tags:
-                range_map[(fig.x_range.tags[0], plot.root.ref['id'])].append((fig, p, fig.xaxis[0], fig.x_range))
+                range_map[fig.x_range.tags[0]].append((fig, p, fig.xaxis[0], fig.x_range))
             if fig.y_range.tags:
-                range_map[(fig.y_range.tags[0], plot.root.ref['id'])].append((fig, p, fig.yaxis[0], fig.y_range))
+                range_map[fig.y_range.tags[0]].append((fig, p, fig.yaxis[0], fig.y_range))
 
-    for (tag, _), axes in range_map.items():
+    for (tag), axes in range_map.items():
         fig, p, ax, axis = axes[0]
         for fig, p, pax, _ in axes[1:]:
             changed = []

panel/template.py

@@ -19,7 +19,7 @@
 from .io.notebook import render_template
 from .io.state import state
 from .layout import Column
-from .pane import panel as _panel, HTML, Str
+from .pane import panel as _panel, HTML, Str, HoloViews
 from .viewable import ServableMixin, Viewable
 from .widgets import Button
 
@@ -113,11 +113,13 @@ def _init_doc(self, doc=None, comm=None, title=None, notebook=False):
         ref = preprocess_root.ref['id']
         for name, (obj, tags) in self._render_items.items():
             model = obj.get_root(doc, comm)
+            doc.on_session_destroyed(obj._server_destroy)
             for sub in obj.select(Viewable):
                 sub._models[ref] = sub._models.get(model.ref['id'])
+                if isinstance(sub, HoloViews):
+                    sub._plots[ref] = sub._plots.get(model.ref['id'])
+            col.objects.append(obj)
             obj._documents[doc] = model
-            doc.on_session_destroyed(obj._server_destroy)
-            col.append(obj)
             model.name = name
             model.tags = tags
             add_to_doc(model, doc, hold=bool(comm))

panel/tests/test_template.py

@@ -44,8 +44,8 @@ def test_template_links_axes(document, comm):
     (_, (m1, _)) = list(p1._models.items())[0]
     (_, (m2, _)) = list(p2._models.items())[0]
     (_, (m3, _)) = list(p3._models.items())[0]
-    assert m1.x_range is not m2.x_range
-    assert m1.y_range is not m2.y_range
+    assert m1.x_range is m2.x_range
+    assert m1.y_range is m2.y_range
     assert m2.x_range is m3.x_range
     assert m2.y_range is m3.y_range