def find_links(root_view, root_model):
"""
Traverses the supplied Viewable searching for Links between any
HoloViews based panes.
"""
if not isinstance(root_view, Panel):
return
hv_views = root_view.select(HoloViews)
root_plots = [
plot for view in hv_views for plot, _ in view._plots.values()
if getattr(plot, 'root', None) is root_model
]
if not root_plots:
return
try:
from holoviews.plotting.links import Link
from holoviews.plotting.bokeh.callbacks import LinkCallback
except:
return
plots = [
(plot, root_plot) for root_plot in root_plots
for plot in root_plot.traverse(lambda x: x, [is_bokeh_element_plot])
]
potentials = [(LinkCallback.find_link(plot), root_plot)
for plot, root_plot in plots]
source_links = [p for p in potentials if p[0] is not None]
found = []
for (plot, links), root_plot in source_links:
for link in links:
if link.target is None:
# If link has no target don't look further
found.append((link, plot, None))
continue
potentials = [
LinkCallback.find_link(plot, link)
for plot, inner_root in plots if inner_root is not root_plot
]
tgt_links = [p for p in potentials if p is not None]
if tgt_links:
found.append((link, plot, tgt_links[0][0]))
new_found = set(found) - root_view._found_links
callbacks = []
for link, src_plot, tgt_plot in new_found:
cb = Link._callbacks['bokeh'][type(link)]
if src_plot is None or (getattr(link, '_requires_target', False)
and tgt_plot is None):
continue
callbacks.append(cb(root_model, link, src_plot, tgt_plot))
root_view._found_links.update(new_found)
return callbacks
def find_links(root_view, root_model):
"""
Traverses the supplied Viewable searching for Links between any
HoloViews based panes.
"""
if not isinstance(root_view, Layout):
return
from holoviews.plotting.links import Link
from holoviews.plotting.bokeh.callbacks import LinkCallback
hv_views = root_view.select(HoloViews)
root_plots = [
plot for view in hv_views for plot in view._plots.values()
if plot.root is root_model
]
plots = [
(plot, root_plot) for root_plot in root_plots
for plot in root_plot.traverse(lambda x: x, [is_bokeh_element_plot])
]
potentials = [(LinkCallback.find_link(plot), root_plot)
for plot, root_plot in plots]
source_links = [p for p in potentials if p[0] is not None]
found = []
for (plot, links), root_plot in source_links:
for link in links:
if link.target is None:
# If link has no target don't look further
found.append((link, plot, None))
continue
potentials = [
LinkCallback.find_link(plot, link)
for plot, inner_root in plots if inner_root is not root_plot
]
tgt_links = [p for p in potentials if p is not None]
if tgt_links:
found.append((link, plot, tgt_links[0][0]))
callbacks = []
for link, src_plot, tgt_plot in found:
cb = Link._callbacks['bokeh'][type(link)]
callbacks.append(cb(root_model, link, src_plot, tgt_plot))
return callbacks
