class DropDownInput(TextInput):
def __init__(self,
preload=None,
preload_attr=None,
preload_clean=True,
**kwargs):
self.multiline = False
self.drop_down = DropDown()
self.drop_down.bind(on_select=self.on_select)
self.bind(on_text_validate=self.add_text)
self.preload = preload
self.preload_attr = preload_attr
self.preload_clean = preload_clean
self.not_preloaded = set()
super(DropDownInput, self).__init__(**kwargs)
self.add_widget(self.drop_down)
def add_text(self, *args):
if args[0].text not in [
btn.text for btn in self.drop_down.children[0].children
if hasattr(btn, "text")
]:
btn = Button(text=args[0].text, size_hint_y=None, height=44)
self.drop_down.add_widget(btn)
btn.bind(on_release=lambda btn: self.drop_down.select(btn.text))
if "preload" not in args:
self.not_preloaded.add(btn)
def on_select(self, *args):
self.text = args[1]
if args[1] not in [
btn.text for btn in self.drop_down.children[0].children
if hasattr(btn, "text")
]:
self.drop_down.append(Button(text=args[1]))
# call on_text_validate after selection
# to avoid having to select textinput and press enter
self.dispatch("on_text_validate")
def on_touch_down(self, touch):
preloaded = set()
if self.preload:
for thing in self.preload:
if self.preload_attr:
# use operator to allow dot access of attributes
thing_string = str(
operator.attrgetter(self.preload_attr)(thing))
else:
thing_string = str(thing)
self.add_text(Button(text=thing_string), "preload")
preloaded.add(thing_string)
# preload_clean removes entries that
# are not in the preload source anymore
if self.preload_clean is True:
added_through_widget = [
btn.text for btn in self.not_preloaded if hasattr(btn, "text")
]
for btn in self.drop_down.children[0].children:
try:
if (btn.text not in preloaded
and btn.text not in added_through_widget):
self.drop_down.remove_widget(btn)
except Exception as ex:
pass
return super(DropDownInput, self).on_touch_down(touch)
def on_touch_up(self, touch):
if touch.grab_current == self:
self.drop_down.open(self)
return super(DropDownInput, self).on_touch_up(touch)
