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Handle explicit triggering in Param pane #1623

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merged 1 commit into from
Oct 12, 2020
Merged

Handle explicit triggering in Param pane #1623

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9 changes: 7 additions & 2 deletions panel/param.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@

import param

from param.parameterized import classlist
from param.parameterized import classlist, discard_events

from .io import init_doc, state
from .layout import Row, Panel, Tabs, Column
Expand Down Expand Up @@ -467,7 +467,12 @@ def action(event):

try:
self._updating.append(p_name)
widget.param.set_param(**updates)
if change.type == 'triggered':
with discard_events(widget):
widget.param.set_param(**updates)
widget.param.trigger(*updates)
else:
widget.param.set_param(**updates)
finally:
self._updating.remove(p_name)

Expand Down
15 changes: 15 additions & 0 deletions panel/tests/test_param.py
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Original file line number Diff line number Diff line change
Expand Up @@ -547,6 +547,21 @@ class Test(param.Parameterized):
assert isinstance(text, TextInput)


def test_trigger_parameters(document, comm):
class Test(param.Parameterized):
a = param.ListSelector(objects=[1,2,3,4], default=list())

t = Test()
t.a.append(4)

pane = Param(t.param.a)

t.a.append(1)
t.param.trigger('a')

assert pane[0].value == [4, 1]


def test_set_display_threshold(document, comm):
class Test(param.Parameterized):
a = param.Number(bounds=(0, 10), precedence=1)
Expand Down