f72baf95ba
- Added async methods to polygon. - The `requests` library is no longer required, with `urllib` being used instead. - Added the `get_bar_data` function, which returns a dataframe of aggregate data from polygon. - Opened up the `subscribe` and `unsubscribe` functions Enhancements: - Tables will now scroll when the rows exceed table height. Bugs: - Fixed a bug preventing async functions being used with horizontal line event. - Fixed a bug causing the legend to show duplicate lines if the line was created after the legend. - Fixed a bug causing the line hide icon to persist within the legend after deletion (#75) - Fixed a bug causing the search box to be unfocused when the chart is loaded.
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TopBar
The `TopBar` class represents the top bar shown on the chart:
This object is accessed from the `topbar` attribute of the chart object (`chart.topbar.<method>`).
Switchers, text boxes and buttons can be added to the top bar, and their instances can be accessed through the `topbar` dictionary. For example:
```python
chart.topbar.textbox('symbol', 'AAPL') # Declares a textbox displaying 'AAPL'.
print(chart.topbar['symbol'].value) # Prints the value within ('AAPL')
chart.topbar['symbol'].set('MSFT') # Sets the 'symbol' textbox to 'MSFT'
print(chart.topbar['symbol'].value) # Prints the value again ('MSFT')
```
___
```{py:method} switcher(name: str, options: tuple: default: str, func: callable)
* `name`: the name of the switcher which can be used to access it from the `topbar` dictionary.
* `options`: The options for each switcher item.
* `default`: The initial switcher option set.
```
___
```{py:method} textbox(name: str, initial_text: str)
* `name`: the name of the text box which can be used to access it from the `topbar` dictionary.
* `initial_text`: The text to show within the text box.
```
___
```{py:method} button(name: str, button_text: str, separator: bool, func: callable)
* `name`: the name of the text box to access it from the `topbar` dictionary.
* `button_text`: Text to show within the button.
* `separator`: places a separator line to the right of the button.
* `func`: The event handler which will be executed upon a button click.
```