electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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combobox.py (2490B)

      1 '''
      2 ComboBox
      3 =======
      4 
      5 Based on Spinner
      6 '''
      7 
      8 __all__ = ('ComboBox', 'ComboBoxOption')
      9 
     10 from kivy.properties import ListProperty, ObjectProperty, BooleanProperty
     11 from kivy.uix.button import Button
     12 from kivy.uix.dropdown import DropDown
     13 from kivy.lang import Builder
     14 
     15 
     16 Builder.load_string('''
     17 <ComboBoxOption>:
     18     size_hint_y: None
     19     height: 44
     20 
     21 <ComboBox>:
     22     background_normal: 'atlas://data/images/defaulttheme/spinner'
     23     background_down: 'atlas://data/images/defaulttheme/spinner_pressed'
     24     on_key:
     25         if self.items: x, y = zip(*self.items); self.text = y[x.index(args[1])]
     26 ''')
     27 
     28 
     29 class ComboBoxOption(Button):
     30     pass
     31 
     32 
     33 class ComboBox(Button):
     34     items = ListProperty()
     35     key = ObjectProperty()
     36 
     37     option_cls = ObjectProperty(ComboBoxOption)
     38 
     39     dropdown_cls = ObjectProperty(DropDown)
     40 
     41     is_open = BooleanProperty(False)
     42 
     43     def __init__(self, **kwargs):
     44         self._dropdown = None
     45         super(ComboBox, self).__init__(**kwargs)
     46         self.items_dict = dict(self.items)
     47         self.bind(
     48             on_release=self._toggle_dropdown,
     49             dropdown_cls=self._build_dropdown,
     50             option_cls=self._build_dropdown,
     51             items=self._update_dropdown,
     52             key=self._update_text)
     53         self._build_dropdown()
     54         self._update_text()
     55 
     56     def _update_text(self, *largs):
     57         try:
     58             self.text = self.items_dict[self.key]
     59         except KeyError:
     60             pass
     61 
     62     def _build_dropdown(self, *largs):
     63         if self._dropdown:
     64             self._dropdown.unbind(on_select=self._on_dropdown_select)
     65             self._dropdown.dismiss()
     66             self._dropdown = None
     67         self._dropdown = self.dropdown_cls()
     68         self._dropdown.bind(on_select=self._on_dropdown_select)
     69         self._update_dropdown()
     70 
     71     def _update_dropdown(self, *largs):
     72         dp = self._dropdown
     73         cls = self.option_cls
     74         dp.clear_widgets()
     75         for key, value in self.items:
     76             item = cls(text=value)
     77             # extra attribute
     78             item.key = key
     79             item.bind(on_release=lambda option: dp.select(option.key))
     80             dp.add_widget(item)
     81 
     82     def _toggle_dropdown(self, *largs):
     83         self.is_open = not self.is_open
     84 
     85     def _on_dropdown_select(self, instance, data, *largs):
     86         self.key = data
     87         self.is_open = False
     88 
     89     def on_is_open(self, instance, value):
     90         if value:
     91             self._dropdown.open(self)
     92         else:
     93             self._dropdown.dismiss()