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- import justpy as jp
- import asyncio
- from ..utils import handle_exceptions, provide_arguments
- class Element:
- wp: None
- view_stack = []
- bindings = []
- def __init__(self, view: jp.HTMLBaseComponent):
- self.parent_view = self.view_stack[-1]
- self.parent_view.add(view)
- view.add_page(self.wp)
- self.view = view
- def set_classes(self, classes: str):
- self.view.classes = classes
- return self
- def add_classes(self, classes: str):
- self.view.classes += ' ' + classes
- return self
- def set_style(self, style: str):
- self.view.style = style
- return self
- def add_style(self, style: str):
- self.view.style += ' ' + style
- return self
- def bind(self, view_attribute, model, model_attribute, interval, transform):
- async def loop():
- while True:
- model_value = transform(getattr(model, model_attribute))
- if getattr(self.view, view_attribute) != model_value:
- print("Update view", view_attribute, 'to', model_value,
- '/ was:', getattr(self.view, view_attribute))
- setattr(self.view, view_attribute, model_value)
- await self.parent_view.update()
- await asyncio.sleep(interval)
- self.bindings.append(loop())
- def bind_text(self, model, attribute, interval=0.1, transform=lambda x: x):
- self.bind('text', model, attribute, interval, transform)
- def bind_value(self, model, attribute, interval=0.1, transform=lambda x: x):
- self.bind('value', model, attribute, interval, transform)
- def update_model(_, event):
- model_value = transform(getattr(model, attribute))
- if model_value != transform(float(event.value)):
- print("Update model", attribute, 'to', event.value, '/ was:', model_value)
- setattr(model, attribute, event.value)
- self.view.on('change', handle_exceptions(update_model))
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