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Add option to hide constant parameters #2637

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merged 2 commits into from
Aug 16, 2021
Merged

Add option to hide constant parameters #2637

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caad268
Add option to hide constant parameters
philippjfr Aug 16, 2021
eb73a43
Add test
philippjfr Aug 16, 2021
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10 changes: 9 additions & 1 deletion panel/param.py
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Original file line number Diff line number Diff line change
Expand Up @@ -115,6 +115,9 @@ class Param(PaneBase):
height = param.Integer(default=None, bounds=(0, None), doc="""
Height of widgetbox the parameter widgets are displayed in.""")

hide_constant = param.Boolean(default=False, doc="""
Whether to hide widgets of constant parameters.""")

initializer = param.Callable(default=None, doc="""
User-supplied function that will be called on initialization,
usually to update the default Parameter values of the
Expand Down Expand Up @@ -213,7 +216,8 @@ def __init__(self, object=None, **params):
type(layout).__name__)
self.param.watch(self._update_widgets, [
'object', 'parameters', 'name', 'display_threshold', 'expand_button',
'expand', 'expand_layout', 'widgets', 'show_labels', 'show_name'])
'expand', 'expand_layout', 'widgets', 'show_labels', 'show_name',
'hide_constant'])
self._update_widgets()

def __repr__(self, depth=0):
Expand Down Expand Up @@ -384,6 +388,8 @@ def widget(self, p_name):
else:
label = p_obj.label
kw = dict(disabled=p_obj.constant, name=label)
if self.hide_constant:
kw['visible'] = not p_obj.constant

value = getattr(self.object, p_name)
if value is not None:
Expand Down Expand Up @@ -460,6 +466,8 @@ def link(change, watchers=[watcher]):
widget = self._widgets[p_name]
if change.what == 'constant':
updates['disabled'] = change.new
if self.hide_constant:
updates['visible'] = not change.new
elif change.what == 'precedence':
if change.new is change.old:
return
Expand Down
16 changes: 16 additions & 0 deletions panel/tests/test_param.py
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Original file line number Diff line number Diff line change
Expand Up @@ -410,6 +410,22 @@ class Test(param.Parameterized):
assert test_pane._widgets['a'] in test_pane._widget_box.objects


def test_hide_constant(document, comm):
class Test(param.Parameterized):
a = param.Number(default=1.2, bounds=(0, 5), constant=True)

test = Test()
test_pane = Pane(test, parameters=['a'], hide_constant=True)
model = test_pane.get_root(document, comm=comm)

slider = model.children[1]
assert not slider.visible

test.param.a.constant = False

assert slider.visible


def test_param_label(document, comm):
class Test(param.Parameterized):
a = param.Number(default=1.2, bounds=(0, 5), label='A')
Expand Down