__init__.py 文件源码

def __call__(self, parameterized, **params):
        self.p = param.ParamOverrides(self, params)
        if self.p.initializer:
            self.p.initializer(parameterized)

        self._widgets = {}
        self.parameterized = parameterized

        widgets, views = self.widgets()
        layout = ipywidgets.Layout(display='flex', flex_flow=self.p.layout)
        if self.p.close_button:
            layout.border = 'solid 1px'

        widget_box = ipywidgets.VBox(children=widgets, layout=layout)
        if views:
            view_box = ipywidgets.VBox(children=views, layout=layout)
            layout = self.p.view_position
            if layout in ['below', 'right']:
                children = [widget_box, view_box]
            else:
                children = [view_box, widget_box]
            box = ipywidgets.VBox if layout in ['below', 'above'] else ipywidgets.HBox
            widget_box = box(children=children)

        display(Javascript(WIDGET_JS))
        display(widget_box)
        self._widget_box = widget_box

        for view in views:
            p_obj = self.parameterized.params(view.name)
            value = getattr(self.parameterized, view.name)
            if value is not None:
                self._update_trait(view.name, p_obj.renderer(value))

        # Keeps track of changes between button presses
        self._changed = {}

        if self.p.on_init:
            self.execute()