picker.py 文件源码

def __init__(self, **kwargs):
        super().__init__(**kwargs)

        if 'background_color' not in kwargs:
            self.background_color = 'white'

        if 'frame' not in kwargs:
            self.width = min(ui.get_window_size()[0] * 0.8, 700)
            self.height = ui.get_window_size()[1] * 0.8

        self._tableview = ui.TableView()
        self._textfield = ui.TextField()
        self._help_label = ui.Label()
        self._datasource = None
        self._handlers = None
        self.shift_enter_enabled = True
        self.did_select_item_action = None

        tf = LayoutProxy(self._textfield)
        self.add_subview(tf)
        tf.layout.align_left_with_superview.equal = 8
        tf.layout.align_top_with_superview.equal = 8
        tf.layout.align_right_with_superview.equal = -8
        tf.layout.height.equal = 31
        tf.delegate = self

        tv = LayoutProxy(self._tableview)
        self.add_subview(tv)
        tv.layout.align_left_to(tf).equal = 0
        tv.layout.align_right_to(tf).equal = 0
        tv.layout.top_offset_to(tf).equal = 8
        tv.allows_selection = True
        tv.allows_multiple_selection = False

        hl = LayoutProxy(self._help_label)
        self.add_subview(hl)
        hl.layout.align_left_to(tv).equal = 0
        hl.layout.align_right_to(tv).equal = 0
        hl.layout.top_offset_to(tv).equal = 8
        hl.layout.align_bottom_with_superview.equal = -8
        hl.layout.height.max = 66
        hl.font = ('<system>', 13.0)
        hl.alignment = ui.ALIGN_CENTER
        hl.text_color = (0, 0, 0, 0.5)
        hl.number_of_lines = 2

        if is_in_hardware_keyboard_mode:
            tf.view.begin_editing()

        self._register_key_event_handlers()