/
tabs.py
184 lines (153 loc) · 6.42 KB
/
tabs.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
"""
Layout component to lay out objects in a set of tabs.
"""
from collections import defaultdict
import param
from bokeh.models import (
Spacer as BkSpacer, Panel as BkPanel, Tabs as BkTabs
)
from ..viewable import Layoutable
from .base import NamedListPanel
class Tabs(NamedListPanel):
"""
Panel of Viewables to be displayed in separate tabs.
"""
closable = param.Boolean(default=False, doc="""
Whether it should be possible to close tabs.""")
dynamic = param.Boolean(default=False, doc="""
Dynamically populate only the active tab.""")
tabs_location = param.ObjectSelector(
default='above', objects=['above', 'below', 'left', 'right'], doc="""
The location of the tabs relative to the tab contents.""")
height = param.Integer(default=None, bounds=(0, None))
width = param.Integer(default=None, bounds=(0, None))
_bokeh_model = BkTabs
_js_transforms = {'tabs': """
var ids = [];
for (var t of value) {{ ids.push(t.id) }};
var value = ids;
"""}
_linked_props = ['active', 'tabs']
_manual_params = ['closable']
_rename = {'name': None, 'objects': 'tabs', 'dynamic': None}
_source_transforms = {'dynamic': None, 'objects': None}
def __init__(self, *objects, **params):
super().__init__(*objects, **params)
self._rendered = defaultdict(dict)
self.param.active.bounds = (0, len(self)-1)
self.param.watch(self._update_active, ['dynamic', 'active'])
def _update_names(self, event):
self.param.active.bounds = (0, len(event.new)-1)
super()._update_names(event)
def _cleanup(self, root):
super()._cleanup(root)
if root.ref['id'] in self._panels:
del self._panels[root.ref['id']]
if root.ref['id'] in self._rendered:
del self._rendered[root.ref['id']]
@property
def _preprocess_params(self):
return NamedListPanel._preprocess_params + (['active'] if self.dynamic else [])
#----------------------------------------------------------------
# Callback API
#----------------------------------------------------------------
def _process_close(self, ref, attr, old, new):
"""
Handle closed tabs.
"""
model, _ = self._models.get(ref)
if model:
try:
inds = [old.index(tab) for tab in new]
except Exception:
return old, None
old = self.objects
new = [old[i] for i in inds]
return old, new
def _comm_change(self, doc, ref, comm, subpath, attr, old, new):
if attr in self._changing.get(ref, []):
self._changing[ref].remove(attr)
return
if attr == 'tabs':
old, new = self._process_close(ref, attr, old, new)
if new is None:
return
super()._comm_change(doc, ref, comm, subpath, attr, old, new)
def _server_change(self, doc, ref, subpath, attr, old, new):
if attr in self._changing.get(ref, []):
self._changing[ref].remove(attr)
return
if attr == 'tabs':
old, new = self._process_close(ref, attr, old, new)
if new is None:
return
super()._server_change(doc, ref, subpath, attr, old, new)
def _update_active(self, *events):
for event in events:
if event.name == 'dynamic' or (self.dynamic and event.name == 'active'):
self.param.trigger('objects')
return
#----------------------------------------------------------------
# Model API
#----------------------------------------------------------------
def _manual_update(self, events, model, doc, root, parent, comm):
for event in events:
if event.name == 'closable':
for child in model.tabs:
child.closable = event.new
def _get_objects(self, model, old_objects, doc, root, comm=None):
"""
Returns new child models for the layout while reusing unchanged
models and cleaning up any dropped objects.
"""
from ..pane.base import RerenderError, panel
new_models = []
if len(self._names) != len(self):
raise ValueError('Tab names do not match objects, ensure '
'that the Tabs.objects are not modified '
'directly. Found %d names, expected %d.' %
(len(self._names), len(self)))
for i, (name, pane) in enumerate(zip(self._names, self)):
pane = panel(pane, name=name)
self.objects[i] = pane
ref = root.ref['id']
panels = self._panels[ref]
rendered = self._rendered[ref]
for obj in old_objects:
if obj in self.objects:
continue
obj._cleanup(root)
panels.pop(id(obj), None)
rendered.pop(id(obj), None)
current_objects = list(self)
for i, (name, pane) in enumerate(zip(self._names, self)):
pref = id(pane)
hidden = self.dynamic and i != self.active
panel = panels.get(pref)
prev_hidden = (
hasattr(panel, 'child') and isinstance(panel.child, BkSpacer) and
panel.child.tags == ['hidden']
)
if prev_hidden and not hidden and pref in rendered:
panel = rendered[pref]
# If object has not changed, we have not toggled between
# hidden and unhidden state or the tabs are not
# dynamic then reuse the panel
if (pane in old_objects and pref in panels and
(not (hidden ^ prev_hidden) or not (self.dynamic or prev_hidden))):
new_models.append(panel)
continue
if hidden:
child = BkSpacer(**{k: v for k, v in pane.param.values().items()
if k in Layoutable.param and v is not None})
child.tags = ['hidden']
else:
try:
rendered[pref] = child = pane._get_model(doc, root, model, comm)
except RerenderError:
return self._get_objects(model, current_objects[:i], doc, root, comm)
panel = panels[pref] = BkPanel(
title=name, name=pane.name, child=child, closable=self.closable
)
new_models.append(panel)
return new_models