def link(change, watchers=[watcher]):
updates = {}
if change.what == 'constant':
updates['disabled'] = change.new
elif change.what == 'precedence':
if (change.new < self.display_threshold
and widget in self._widget_box.objects):
self._widget_box.pop(widget)
elif change.new >= self.display_threshold:
precedence = lambda k: self.object.param[
'name' if k == '_title' else k].precedence
params = self._ordered_params
if self.show_name:
params.insert(0, '_title')
widgets = []
for k in params:
if precedence(k) is None or precedence(
k) >= self.display_threshold:
widgets.append(self._widgets[k])
self._widget_box.objects = widgets
return
elif change.what == 'objects':
updates['options'] = p_obj.get_range()
elif change.what == 'bounds':
start, end = p_obj.get_soft_bounds()
updates['start'] = start
updates['end'] = end
elif change.what == 'step':
updates['step'] = p_obj.step
elif change.what == 'label':
updates['name'] = p_obj.label
elif p_name in self._updating:
return
elif hasattr(param, 'Event') and isinstance(p_obj, param.Event):
return
elif isinstance(p_obj, param.Action):
prev_watcher = watchers[0]
widget.param.unwatch(prev_watcher)
def action(event):
change.new(self.object)
watchers[0] = widget.param.watch(action, 'clicks')
idx = self._callbacks.index(prev_watcher)
self._callbacks[idx] = watchers[0]
return
else:
updates['value'] = change.new
try:
self._updating.append(p_name)
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)
def link(change, watchers=[watcher]):
updates = {}
widget = self._widgets[p_name]
if change.what == 'constant':
updates['disabled'] = change.new
elif change.what == 'precedence':
if (change.new < self.display_threshold and
widget in self._widget_box.objects):
self._widget_box.pop(widget)
elif change.new >= self.display_threshold:
self._rerender()
return
elif change.what == 'objects':
updates['options'] = p_obj.get_range()
elif change.what == 'bounds':
start, end = p_obj.get_soft_bounds()
supports_bounds = hasattr(widget, 'start')
if start is None or end is None:
rerender = supports_bounds
else:
rerender = not supports_bounds
if supports_bounds:
updates['start'] = start
updates['end'] = end
if rerender:
self._rerender_widget(p_name)
return
elif change.what == 'step':
updates['step'] = p_obj.step
elif change.what == 'label':
updates['name'] = p_obj.label
elif p_name in self._updating:
return
elif hasattr(param, 'Event') and isinstance(p_obj, param.Event):
return
elif isinstance(p_obj, param.Action):
prev_watcher = watchers[0]
widget.param.unwatch(prev_watcher)
def action(event):
change.new(self.object)
watchers[0] = widget.param.watch(action, 'clicks')
idx = self._callbacks.index(prev_watcher)
self._callbacks[idx] = watchers[0]
return
elif kw_widget.get('throttled', False) and hasattr(widget, 'value_throttled'):
updates['value_throttled'] = change.new
else:
updates['value'] = change.new
try:
self._updating.append(p_name)
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)
def test_discard_events_decorator(self):
def accumulator(change):
self.accumulator += change.new
obj = SimpleWatchExample()
obj.param.watch(accumulator, 'a')
with discard_events(obj):
obj.a = 1
self.assertEqual(self.accumulator, 0)
obj.a = 2
self.assertEqual(self.accumulator, 3)