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Factor out NamedListLike baseclass #2127

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merged 3 commits into from
Mar 29, 2021
Merged

Factor out NamedListLike baseclass #2127

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72a833e
Factor out NamedListLike baseclass
philippjfr Mar 29, 2021
0e07361
Add missing methods
philippjfr Mar 29, 2021
692b2be
Add missing getitem
philippjfr Mar 29, 2021
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157 changes: 100 additions & 57 deletions panel/layout/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,6 @@ def select(self, selector=None):
return objects



class ListLike(param.Parameterized):

objects = param.List(default=[], doc="""
Expand Down Expand Up @@ -331,72 +330,21 @@ def reverse(self):
new_objects.reverse()
self.objects = new_objects



class ListPanel(ListLike, Panel):
"""
An abstract baseclass for Panel objects with list-like children.
"""

margin = param.Parameter(default=0, doc="""
Allows to create additional space around the component. May
be specified as a two-tuple of the form (vertical, horizontal)
or a four-tuple (top, right, bottom, left).""")

scroll = param.Boolean(default=False, doc="""
Whether to add scrollbars if the content overflows the size
of the container.""")

_source_transforms = {'scroll': None}

__abstract = True

def __init__(self, *objects, **params):
from ..pane import panel
if objects:
if 'objects' in params:
raise ValueError("A %s's objects should be supplied either "
"as positional arguments or as a keyword, "
"not both." % type(self).__name__)
params['objects'] = [panel(pane) for pane in objects]
elif 'objects' in params:
params['objects'] = [panel(pane) for pane in params['objects']]
super(Panel, self).__init__(**params)

def _process_param_change(self, params):
scroll = params.pop('scroll', None)
css_classes = self.css_classes or []
if scroll:
params['css_classes'] = css_classes + ['scrollable']
elif scroll == False:
params['css_classes'] = css_classes
return super()._process_param_change(params)

def _cleanup(self, root):
if root.ref['id'] in state._fake_roots:
state._fake_roots.remove(root.ref['id'])
super()._cleanup(root)
for p in self.objects:
p._cleanup(root)


class NamedListPanel(ListPanel):

active = param.Integer(default=0, bounds=(0, None), doc="""
Index of the currently displayed objects.""")
class NamedListLike(param.Parameterized):

objects = param.List(default=[], doc="""
The list of child objects that make up the tabs.""")
The list of child objects that make up the layout.""")

def __init__(self, *items, **params):
if 'objects' in params:
if items:
raise ValueError('%s objects should be supplied either '
'as positional arguments or as a keyword, '
'not both.' % type(self).__name__)
items = params['objects']
objects, self._names = self._to_objects_and_names(items)
super().__init__(*objects, **params)
items = params.pop('objects')
params['objects'], self._names = self._to_objects_and_names(items)
super().__init__(**params)
self._panels = defaultdict(dict)
self.param.watch(self._update_names, 'objects')
# ALERT: Ensure that name update happens first, should be
Expand Down Expand Up @@ -441,6 +389,20 @@ def _update_active(self, *events):
# Public API
#----------------------------------------------------------------

def __getitem__(self, index):
return self.objects[index]

def __len__(self):
return len(self.objects)

def __iter__(self):
for obj in self.objects:
yield obj

def __iadd__(self, other):
self.extend(other)
return self

def __add__(self, other):
if isinstance(other, NamedListPanel):
other = list(zip(other._names, other.objects))
Expand Down Expand Up @@ -621,6 +583,87 @@ def reverse(self):
self.objects = new_objects


class ListPanel(ListLike, Panel):
"""
An abstract baseclass for Panel objects with list-like children.
"""

margin = param.Parameter(default=0, doc="""
Allows to create additional space around the component. May
be specified as a two-tuple of the form (vertical, horizontal)
or a four-tuple (top, right, bottom, left).""")

scroll = param.Boolean(default=False, doc="""
Whether to add scrollbars if the content overflows the size
of the container.""")

_source_transforms = {'scroll': None}

__abstract = True

def __init__(self, *objects, **params):
from ..pane import panel
if objects:
if 'objects' in params:
raise ValueError("A %s's objects should be supplied either "
"as positional arguments or as a keyword, "
"not both." % type(self).__name__)
params['objects'] = [panel(pane) for pane in objects]
elif 'objects' in params:
params['objects'] = [panel(pane) for pane in params['objects']]
super(Panel, self).__init__(**params)

def _process_param_change(self, params):
scroll = params.pop('scroll', None)
css_classes = self.css_classes or []
if scroll:
params['css_classes'] = css_classes + ['scrollable']
elif scroll == False:
params['css_classes'] = css_classes
return super()._process_param_change(params)

def _cleanup(self, root):
if root.ref['id'] in state._fake_roots:
state._fake_roots.remove(root.ref['id'])
super()._cleanup(root)
for p in self.objects:
p._cleanup(root)


class NamedListPanel(NamedListLike, Panel):

active = param.Integer(default=0, bounds=(0, None), doc="""
Index of the currently displayed objects.""")

margin = param.Parameter(default=0, doc="""
Allows to create additional space around the component. May
be specified as a two-tuple of the form (vertical, horizontal)
or a four-tuple (top, right, bottom, left).""")

scroll = param.Boolean(default=False, doc="""
Whether to add scrollbars if the content overflows the size
of the container.""")

_source_transforms = {'scroll': None}

__abstract = True

def _process_param_change(self, params):
scroll = params.pop('scroll', None)
css_classes = self.css_classes or []
if scroll:
params['css_classes'] = css_classes + ['scrollable']
elif scroll == False:
params['css_classes'] = css_classes
return super()._process_param_change(params)

def _cleanup(self, root):
if root.ref['id'] in state._fake_roots:
state._fake_roots.remove(root.ref['id'])
super()._cleanup(root)
for p in self.objects:
p._cleanup(root)


class Row(ListPanel):
"""
Expand Down