[BUG] Error using Widget with WxChart

[JuanGabrielAM]

Expected Behavior

When you open the graph, it loads the position of the lines created with the toolbox and when you close the program it should save the coordinates of the lines in the drawings.json file.

Current Behaviour

When moving a created line, the following error appears in the terminal (I am using vcode):

Tracking (most recent recent calls):
File "C:\Users\Home\AppData\Local\Programs\Python\Python312\Lib\site-packages\lightweight_charts\widgets.py", line 64, in
self.webview.Bind(wx.html2.EVT_WEBVIEW_SCRIPT_MESSAGE_RECEIVED, lambda e: emit_callback(self, e.GetString()))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Home\AppData\Local\Programs\Python\Python312\Lib\site-packages\lightweight_charts\widgets.py", line 50, in emit_callback
func, args = parse_event_message(window, string)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Home\AppData\Local\Programs\Python\Python312\Lib\site-packages\lightweight_charts\util.py", line 33, in parse_event_message
func = window.handlers[name]
^^^^^^^^^^^^^^^
AttributeError: Object 'WxChart' does not have attribute 'controllers'

Reproducible Example

import pandas as pd
from lightweight_charts import Chart
import re
import json

def calculate_sma(df, period: int = 50):
    return pd.DataFrame({
        'time': df['date'],
        f'SMA {period}': df['close'].rolling(window=period).mean()
    }).dropna()

def get_bar_data(symbol, timeframe):
    #print(f'Archivo: {symbol}_{timeframe}.csv')
    if symbol not in ('AAPL', 'GOOGL', 'TSLA'):
        print(f'No data for "{symbol}"')
        return pd.DataFrame()
    return pd.read_csv(f'bar_data/{symbol}_{timeframe}.csv')


def on_search(chart, searched_string):
    new_data = get_bar_data(searched_string, chart.topbar['timeframe'].value)
    if new_data.empty:
        return
    chart.topbar['symbol'].set(searched_string)
    chart.set(new_data)
    
    # Load the drawings saved under the symbol.
    chart.toolbox.load_drawings(searched_string)


def on_timeframe_selection(chart):
    new_data = get_bar_data(chart.topbar['symbol'].value, chart.topbar['timeframe'].value)
    if new_data.empty:
        return
    # The symbol has not changed, so we want to re-render the drawings.
    chart.set(new_data, render_drawings=True)  

if __name__ == '__main__':

    chart = Chart(toolbox=True)
    chart.legend(True)

    chart.events.search += on_search
    chart.topbar.textbox('symbol', 'TSLA')
    chart.topbar.switcher(
        'timeframe',
        ('1min', '5min', '30min'),
        default='1min',
        func=on_timeframe_selection
    )

    df = get_bar_data('TSLA', '1min')
    
    chart.set(df)

    line = chart.create_line('SMA 20')
    sma_data = calculate_sma(df, period=20)
    line.set(sma_data)

    line = chart.create_line('SMA 40','rgba(255,0,0,1)')
    sma_data = calculate_sma(df, period=40)
    line.set(sma_data)

    # Imports the drawings saved in the JSON file.
    chart.toolbox.import_drawings('drawings.json')
    
    # Loads the drawings under the default symbol.
    chart.toolbox.load_drawings(chart.topbar['symbol'].value)  
    
    # Saves drawings based on the symbol.
    chart.toolbox.save_drawings_under(chart.topbar['symbol'])  

    chart.show(block=True)
    
    # Exports the drawings to the JSON file upon close.
    chart.toolbox.export_drawings('drawings.json')

Environment

- OS: Windows 11
- Library: 1.0.20

[louisnw01]

Please provide a minimal reproducible example.