a58f1e306c
- Added the ChartAsync class, allowing for more sophisticated Charts and SubCharts. - Symbol searching, timeframe selectors, and more is now possible with this varation of Chart. `QtChart` and `WxChart` have access to all the methods that `ChartAsync` has, however they utilize their own respective event loops rather than asyncio. New Feature: `StreamlitChart` - Chart window that can display static data within a Streamlit application. Removed the `subscribe_click` method.
647 lines
27 KiB
Python
647 lines
27 KiB
Python
import pandas as pd
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from datetime import timedelta, datetime
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from typing import Union, Literal
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from lightweight_charts.pkg import LWC_4_0_1
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from lightweight_charts.util import LINE_STYLE, MARKER_POSITION, MARKER_SHAPE, CROSSHAIR_MODE, _crosshair_mode, _line_style, \
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MissingColumn, _js_bool, _price_scale_mode, PRICE_SCALE_MODE, _marker_position, _marker_shape, IDGen
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class SeriesCommon:
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def _set_interval(self, df: pd.DataFrame):
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common_interval = pd.to_datetime(df['time']).diff().value_counts()
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self._interval = common_interval.index[0]
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def _df_datetime_format(self, df: pd.DataFrame):
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if 'date' in df.columns:
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df = df.rename(columns={'date': 'time'})
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self._set_interval(df)
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# df['time'] = df['time'].apply(self._datetime_format)
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df['time'] = self._datetime_format(df['time'])
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return df
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def _series_datetime_format(self, series):
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if 'date' in series.keys():
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series = series.rename({'date': 'time'})
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series['time'] = self._datetime_format(series['time'])
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return series
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def _datetime_format(self, arg: Union[pd.Series, str]):
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arg = pd.to_datetime(arg)
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if self._interval != timedelta(days=1):
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arg = arg.astype('int64') // 10 ** 9 if isinstance(arg, pd.Series) else arg.timestamp()
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arg = self._interval.total_seconds() * (arg // self._interval.total_seconds())
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else:
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arg = arg.dt.strftime('%Y-%m-%d') if isinstance(arg, pd.Series) else arg.strftime('%Y-%m-%d')
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return arg
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def marker(self, time: datetime = None, position: MARKER_POSITION = 'below', shape: MARKER_SHAPE = 'arrow_up',
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color: str = '#2196F3', text: str = '') -> str:
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"""
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Creates a new marker.\n
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:param time: The time that the marker will be placed at. If no time is given, it will be placed at the last bar.
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:param position: The position of the marker.
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:param color: The color of the marker (rgb, rgba or hex).
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:param shape: The shape of the marker.
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:param text: The text to be placed with the marker.
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:return: The id of the marker placed.
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"""
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try:
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time = self._last_bar['time'] if not time else self._datetime_format(time)
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except TypeError:
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raise TypeError('Chart marker created before data was set.')
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marker_id = self._rand.generate()
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self.run_script(f"""
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{self.id}.markers.push({{
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time: {time if isinstance(time, float) else f"'{time}'"},
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position: '{_marker_position(position)}',
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color: '{color}',
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shape: '{_marker_shape(shape)}',
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text: '{text}',
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id: '{marker_id}'
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}});
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{self.id}.series.setMarkers({self.id}.markers)""")
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return marker_id
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def remove_marker(self, marker_id: str):
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"""
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Removes the marker with the given id.\n
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"""
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self.run_script(f'''
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{self.id}.markers.forEach(function (marker) {{
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if ('{marker_id}' === marker.id) {{
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{self.id}.markers.splice({self.id}.markers.indexOf(marker), 1)
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{self.id}.series.setMarkers({self.id}.markers)
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}}
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}});''')
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def horizontal_line(self, price: Union[float, int], color: str = 'rgb(122, 146, 202)', width: int = 1,
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style: LINE_STYLE = 'solid', text: str = '', axis_label_visible=True):
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"""
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Creates a horizontal line at the given price.\n
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"""
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self.run_script(f"""
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makeHorizontalLine({self.id}, {price}, '{color}', {width}, {_line_style(style)}, {_js_bool(axis_label_visible)}, '{text}')
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""")
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def remove_horizontal_line(self, price: Union[float, int]):
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"""
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Removes a horizontal line at the given price.
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"""
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self.run_script(f'''
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{self.id}.horizontal_lines.forEach(function (line) {{
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if ({price} === line.price) {{
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{self.id}.series.removePriceLine(line.line);
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{self.id}.horizontal_lines.splice({self.id}.horizontal_lines.indexOf(line), 1)
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}}
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}});''')
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def title(self, title: str):
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self.run_script(f'{self.id}.series.applyOptions({{title: "{title}"}})')
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class Line(SeriesCommon):
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def __init__(self, parent, color, width):
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self._parent = parent
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self._rand = self._parent._rand
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self.id = f'window.{self._rand.generate()}'
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self.run_script = self._parent.run_script
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self._parent.run_script(f'''
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{self.id} = {{
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series: {self._parent.id}.chart.addLineSeries({{
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color: '{color}',
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lineWidth: {width},
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}}),
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markers: [],
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horizontal_lines: [],
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}}
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''')
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def set(self, data: pd.DataFrame):
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"""
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Sets the line data.\n
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:param data: columns: date/time, value
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"""
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df = self._parent._df_datetime_format(data)
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self._last_bar = df.iloc[-1]
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self.run_script(f'{self.id}.series.setData({df.to_dict("records")})')
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def update(self, series: pd.Series):
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"""
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Updates the line data.\n
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:param series: labels: date/time, value
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"""
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series = self._parent._series_datetime_format(series)
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self._last_bar = series
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self.run_script(f'{self.id}.series.update({series.to_dict()})')
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class LWC(SeriesCommon):
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def __init__(self, volume_enabled: bool = True, inner_width: float = 1.0, inner_height: float = 1.0, dynamic_loading: bool = False):
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self._volume_enabled = volume_enabled
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self._inner_width = inner_width
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self._inner_height = inner_height
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self._dynamic_loading = dynamic_loading
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self._rand = IDGen()
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self.id = f'window.{self._rand.generate()}'
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self._position = 'left'
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self.loaded = False
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self._html = HTML
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self._scripts = []
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self._script_func = None
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self._last_bar = None
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self._interval = None
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self._background_color = '#000000'
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self._volume_up_color = 'rgba(83,141,131,0.8)'
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self._volume_down_color = 'rgba(200,127,130,0.8)'
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def _on_js_load(self):
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if self.loaded:
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return
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self.loaded = True
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[self.run_script(script) for script in self._scripts]
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def _create_chart(self, top_bar=False):
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self.run_script(f'''
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{self.id} = makeChart({self._inner_width}, {self._inner_height}, topBar={_js_bool(top_bar)})
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{self.id}.id = '{self.id}'
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{self.id}.wrapper.style.float = "{self._position}"
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''')
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def run_script(self, script):
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"""
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For advanced users; evaluates JavaScript within the Webview.
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"""
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self._script_func(script) if self.loaded else self._scripts.append(script)
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def set(self, df: pd.DataFrame):
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"""
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Sets the initial data for the chart.\n
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:param df: columns: date/time, open, high, low, close, volume (if volume enabled).
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"""
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bars = self._df_datetime_format(df)
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self._last_bar = bars.iloc[-1]
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if self._volume_enabled:
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if 'volume' not in bars:
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raise MissingColumn("Volume enabled, but 'volume' column was not found.")
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volume = bars.drop(columns=['open', 'high', 'low', 'close']).rename(columns={'volume': 'value'})
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volume['color'] = self._volume_down_color
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volume.loc[bars['close'] > bars['open'], 'color'] = self._volume_up_color
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self.run_script(f'{self.id}.volumeSeries.setData({volume.to_dict(orient="records")})')
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bars = bars.drop(columns=['volume'])
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bars = bars.to_dict(orient='records')
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self.run_script(f'''
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{self.id}.candleData = {bars}
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{self.id}.shownData = ({self.id}.candleData.length >= 190) ? {self.id}.candleData.slice(-190) : {self.id}.candleData
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{self.id}.series.setData({self.id}.shownData);
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var timer = null;
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{self.id}.chart.timeScale().subscribeVisibleLogicalRangeChange(() => {{
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if (timer !== null) {{
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return;
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}}
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timer = setTimeout(() => {{
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let chart = {self.id}
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let logicalRange = chart.chart.timeScale().getVisibleLogicalRange();
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if (logicalRange !== null) {{
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let barsInfo = chart.series.barsInLogicalRange(logicalRange);
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if (barsInfo === null || barsInfo.barsBefore === null || barsInfo.barsAfter === null) {{return}}
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if (barsInfo !== null && barsInfo.barsBefore < 20 || barsInfo.barsAfter < 20) {{
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let newBeginning = chart.candleData.indexOf(chart.shownData[0])+Math.round(barsInfo.barsBefore)-20
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let newEnd = chart.candleData.indexOf(chart.shownData[chart.shownData.length-2])-Math.round(barsInfo.barsAfter)+20
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if (newBeginning < 0) {{
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newBeginning = 0
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}}
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chart.shownData = chart.candleData.slice(newBeginning, newEnd)
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if (newEnd-17 <= chart.candleData.length-1) {{
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chart.shownData[chart.shownData.length - 1] = Object.assign({{}}, chart.shownData[chart.shownData.length - 1]);
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chart.shownData[chart.shownData.length - 1].open = chart.candleData[chart.candleData.length - 1].close;
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chart.shownData[chart.shownData.length - 1].high = chart.candleData[chart.candleData.length - 1].close;
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chart.shownData[chart.shownData.length - 1].low = chart.candleData[chart.candleData.length - 1].close;
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chart.shownData[chart.shownData.length - 1].close = chart.candleData[chart.candleData.length - 1].close;
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}}
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chart.series.setData(chart.shownData);
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}}
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}}
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timer = null;
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}}, 50);
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}});
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''') if self._dynamic_loading else self.run_script(f'{self.id}.series.setData({bars})')
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def update(self, series, from_tick=False):
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"""
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Updates the data from a bar;
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if series['time'] is the same time as the last bar, the last bar will be overwritten.\n
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:param series: labels: date/time, open, high, low, close, volume (if volume enabled).
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"""
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series = self._series_datetime_format(series) if not from_tick else series
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self._last_bar = series
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if self._volume_enabled:
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if 'volume' not in series:
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raise MissingColumn("Volume enabled, but 'volume' column was not found.")
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volume = series.drop(['open', 'high', 'low', 'close']).rename({'volume': 'value'})
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volume['color'] = self._volume_up_color if series['close'] > series['open'] else self._volume_down_color
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self.run_script(f'{self.id}.volumeSeries.update({volume.to_dict()})')
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series = series.drop(['volume'])
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bar = series.to_dict()
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self.run_script(f'''
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let logicalRange = {self.id}.chart.timeScale().getVisibleLogicalRange();
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let barsInfo = {self.id}.series.barsInLogicalRange(logicalRange);
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if ({self.id}.candleData[{self.id}.candleData.length-1].time === {bar['time']}) {{
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{self.id}.shownData[{self.id}.shownData.length-1] = {bar}
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{self.id}.candleData[{self.id}.candleData.length-1] = {bar}
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}}
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else {{
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if (barsInfo.barsAfter > 0) {{
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{self.id}.shownData[{self.id}.shownData.length-1] = {bar}
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}}
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else {{
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{self.id}.shownData.push({bar})
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}}
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{self.id}.candleData.push({bar})
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}}
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{self.id}.series.update({self.id}.shownData[{self.id}.shownData.length-1])
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''') if self._dynamic_loading else self.run_script(f'{self.id}.series.update({bar})')
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def update_from_tick(self, series):
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"""
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Updates the data from a tick.\n
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:param series: labels: date/time, price, volume (if volume enabled).
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"""
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series = self._series_datetime_format(series)
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bar = pd.Series()
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if series['time'] == self._last_bar['time']:
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bar = self._last_bar
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bar['high'] = max(self._last_bar['high'], series['price'])
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bar['low'] = min(self._last_bar['low'], series['price'])
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bar['close'] = series['price']
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if self._volume_enabled:
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if 'volume' not in series:
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raise MissingColumn("Volume enabled, but 'volume' column was not found.")
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bar['volume'] = series['volume']
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else:
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for key in ('open', 'high', 'low', 'close'):
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bar[key] = series['price']
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bar['time'] = series['time']
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bar['volume'] = 0
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self.update(bar, from_tick=True)
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def create_line(self, color: str = 'rgba(214, 237, 255, 0.6)', width: int = 2):
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"""
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Creates and returns a Line object.)\n
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"""
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return Line(self, color, width)
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def price_scale(self, mode: PRICE_SCALE_MODE = 'normal', align_labels: bool = True, border_visible: bool = False,
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border_color: str = None, text_color: str = None, entire_text_only: bool = False, ticks_visible: bool = False):
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self.run_script(f'''
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{self.id}.chart.priceScale('right').applyOptions({{
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mode: {_price_scale_mode(mode)},
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alignLabels: {_js_bool(align_labels)},
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borderVisible: {_js_bool(border_visible)},
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{f'borderColor: "{border_color}",' if border_color else ''}
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{f'textColor: "{text_color}",' if text_color else ''}
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entireTextOnly: {_js_bool(entire_text_only)},
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ticksVisible: {_js_bool(ticks_visible)},
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}})''')
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def time_scale(self, right_offset: int = 0, min_bar_spacing: float = 0.5,
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visible: bool = True, time_visible: bool = True, seconds_visible: bool = False,
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border_visible: bool = True, border_color: str = None):
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"""
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Options for the time scale of the chart.
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"""
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self.run_script(f'''
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{self.id}.chart.applyOptions({{
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timeScale: {{
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rightOffset: {right_offset},
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minBarSpacing: {min_bar_spacing},
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visible: {_js_bool(visible)},
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timeVisible: {_js_bool(time_visible)},
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secondsVisible: {_js_bool(seconds_visible)},
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borderVisible: {_js_bool(border_visible)},
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{f'borderColor: "{border_color}",' if border_color else ''}
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}}
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}})''')
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def layout(self, background_color: str = None, text_color: str = None, font_size: int = None,
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font_family: str = None):
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"""
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Global layout options for the chart.
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"""
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self._background_color = background_color if background_color else self._background_color
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self.run_script(f"""
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document.body.style.backgroundColor = '{self._background_color}'
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{self.id}.chart.applyOptions({{
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layout: {{
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background: {{
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color: "{self._background_color}",
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}},
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{f'textColor: "{text_color}",' if text_color else ''}
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{f'fontSize: {font_size},' if font_size else ''}
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{f'fontFamily: "{font_family}",' if font_family else ''}
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}}}})""")
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def grid(self, vert_enabled: bool = True, horz_enabled: bool = True, color: str = 'rgba(29, 30, 38, 5)', style: LINE_STYLE = 'solid'):
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"""
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Grid styling for the chart.
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"""
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self.run_script(f"""
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{self.id}.chart.applyOptions({{
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grid: {{
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vertLines: {{
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visible: {_js_bool(vert_enabled)},
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color: "{color}",
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style: {_line_style(style)},
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}},
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horzLines: {{
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visible: {_js_bool(horz_enabled)},
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color: "{color}",
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style: {_line_style(style)},
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}},
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}}
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}})""")
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def candle_style(self, up_color: str = 'rgba(39, 157, 130, 100)', down_color: str = 'rgba(200, 97, 100, 100)',
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wick_enabled: bool = True, border_enabled: bool = True, border_up_color: str = '',
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border_down_color: str = '', wick_up_color: str = '', wick_down_color: str = ''):
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"""
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Candle styling for each of its parts.
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"""
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self.run_script(f"""
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{self.id}.series.applyOptions({{
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upColor: "{up_color}",
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downColor: "{down_color}",
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wickVisible: {_js_bool(wick_enabled)},
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borderVisible: {_js_bool(border_enabled)},
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{f'borderUpColor: "{border_up_color}",' if border_up_color else up_color if border_enabled else ''}
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{f'borderDownColor: "{border_down_color}",' if border_down_color else down_color if border_enabled else ''}
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{f'wickUpColor: "{wick_up_color}",' if wick_up_color else wick_up_color if wick_enabled else ''}
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{f'wickDownColor: "{wick_down_color}",' if wick_down_color else wick_down_color if wick_enabled else ''}
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}})""")
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def volume_config(self, scale_margin_top: float = 0.8, scale_margin_bottom: float = 0.0,
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up_color='rgba(83,141,131,0.8)', down_color='rgba(200,127,130,0.8)'):
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"""
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Configure volume settings.\n
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Numbers for scaling must be greater than 0 and less than 1.\n
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Volume colors must be applied prior to setting/updating the bars.\n
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:param scale_margin_top: Scale the top of the margin.
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:param scale_margin_bottom: Scale the bottom of the margin.
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:param up_color: Volume color for upward direction (rgb, rgba or hex)
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:param down_color: Volume color for downward direction (rgb, rgba or hex)
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"""
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self._volume_up_color = up_color if up_color else self._volume_up_color
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self._volume_down_color = down_color if down_color else self._volume_down_color
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self.run_script(f'''
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{self.id}.volumeSeries.priceScale().applyOptions({{
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scaleMargins: {{
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top: {scale_margin_top},
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bottom: {scale_margin_bottom},
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}}
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}})''')
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def crosshair(self, mode: CROSSHAIR_MODE = 'normal', vert_width: int = 1, vert_color: str = None,
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vert_style: LINE_STYLE = 'dashed', vert_label_background_color: str = 'rgb(46, 46, 46)', horz_width: int = 1,
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horz_color: str = None, horz_style: LINE_STYLE = 'dashed', horz_label_background_color: str = 'rgb(55, 55, 55)'):
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"""
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Crosshair formatting for its vertical and horizontal axes.
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"""
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self.run_script(f'''
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|
{self.id}.chart.applyOptions({{
|
|
crosshair: {{
|
|
mode: {_crosshair_mode(mode)},
|
|
vertLine: {{
|
|
width: {vert_width},
|
|
{f'color: "{vert_color}",' if vert_color else ''}
|
|
style: {_line_style(vert_style)},
|
|
labelBackgroundColor: "{vert_label_background_color}"
|
|
}},
|
|
horzLine: {{
|
|
width: {horz_width},
|
|
{f'color: "{horz_color}",' if horz_color else ''}
|
|
style: {_line_style(horz_style)},
|
|
labelBackgroundColor: "{horz_label_background_color}"
|
|
}}
|
|
}}}})''')
|
|
|
|
def watermark(self, text: str, font_size: int = 44, color: str = 'rgba(180, 180, 200, 0.5)'):
|
|
"""
|
|
Adds a watermark to the chart.
|
|
"""
|
|
self.run_script(f'''
|
|
{self.id}.chart.applyOptions({{
|
|
watermark: {{
|
|
visible: true,
|
|
fontSize: {font_size},
|
|
horzAlign: 'center',
|
|
vertAlign: 'center',
|
|
color: '{color}',
|
|
text: '{text}',
|
|
}}
|
|
}})''')
|
|
|
|
def legend(self, visible: bool = False, ohlc: bool = True, percent: bool = True, color: str = None,
|
|
font_size: int = None, font_family: str = None):
|
|
"""
|
|
Configures the legend of the chart.
|
|
"""
|
|
if visible:
|
|
self.run_script(f'''
|
|
{f"{self.id}.legend.style.color = '{color}'" if color else ''}
|
|
{f"{self.id}.legend.style.fontSize = {font_size}" if font_size else ''}
|
|
{f"{self.id}.legend.style.fontFamily = '{font_family}'" if font_family else ''}
|
|
|
|
{self.id}.chart.subscribeCrosshairMove((param) => {{
|
|
if (param.time){{
|
|
const data = param.seriesData.get({self.id}.series);
|
|
if (!data) {{return}}
|
|
let percentMove = ((data.close-data.open)/data.open)*100
|
|
let ohlc = `O ${{legendItemFormat(data.open)}}
|
|
| H ${{legendItemFormat(data.high)}}
|
|
| L ${{legendItemFormat(data.low)}}
|
|
| C ${{legendItemFormat(data.close)}} `
|
|
let percent = `| ${{percentMove >= 0 ? '+' : ''}}${{percentMove.toFixed(2)}} %`
|
|
let finalString = ''
|
|
{'finalString += ohlc' if ohlc else ''}
|
|
{'finalString += percent' if percent else ''}
|
|
{self.id}.legend.innerHTML = finalString
|
|
}}
|
|
else {{
|
|
{self.id}.legend.innerHTML = ''
|
|
}}
|
|
}});''')
|
|
|
|
def create_subchart(self, volume_enabled: bool = True, position: Literal['left', 'right', 'top', 'bottom'] = 'left',
|
|
width: float = 0.5, height: float = 0.5, sync: Union[bool, str] = False):
|
|
return SubChart(self, volume_enabled, position, width, height, sync)
|
|
|
|
|
|
class SubChart(LWC):
|
|
def __init__(self, parent, volume_enabled, position, width, height, sync):
|
|
super().__init__(volume_enabled, width, height)
|
|
self._chart = parent._chart if isinstance(parent, SubChart) else parent
|
|
self._parent = parent
|
|
self._position = position
|
|
self._rand = self._chart._rand
|
|
self.id = f'window.{self._rand.generate()}'
|
|
self.run_script = self._chart.run_script
|
|
self._create_chart()
|
|
if not sync:
|
|
return
|
|
sync_parent_var = self._parent.id if isinstance(sync, bool) else sync
|
|
self.run_script(f'''
|
|
{sync_parent_var}.chart.timeScale().subscribeVisibleLogicalRangeChange((timeRange) => {{
|
|
{self.id}.chart.timeScale().setVisibleLogicalRange(timeRange)
|
|
}});
|
|
''')
|
|
|
|
|
|
SCRIPT = """
|
|
document.body.style.backgroundColor = '#000000'
|
|
const up = 'rgba(39, 157, 130, 100)'
|
|
const down = 'rgba(200, 97, 100, 100)'
|
|
|
|
const wrapper = document.createElement('div')
|
|
wrapper.className = 'wrapper'
|
|
document.body.appendChild(wrapper)
|
|
|
|
function makeChart(innerWidth, innerHeight, topBar=false) {
|
|
let chart = {
|
|
markers: [],
|
|
horizontal_lines: [],
|
|
div: document.createElement('div'),
|
|
wrapper: document.createElement('div'),
|
|
legend: document.createElement('div'),
|
|
scale: {
|
|
width: innerWidth,
|
|
height: innerHeight
|
|
},
|
|
}
|
|
let topBarOffset = 0
|
|
if (topBar) {
|
|
makeTopBar(chart)
|
|
topBarOffset = chart.topBar.offsetHeight
|
|
}
|
|
|
|
chart.chart = LightweightCharts.createChart(chart.div, {
|
|
width: window.innerWidth*innerWidth,
|
|
height: (window.innerHeight*innerHeight)-topBarOffset,
|
|
layout: {
|
|
textColor: '#d1d4dc',
|
|
background: {
|
|
color:'#000000',
|
|
type: LightweightCharts.ColorType.Solid,
|
|
},
|
|
fontSize: 12
|
|
},
|
|
rightPriceScale: {
|
|
scaleMargins: {top: 0.3, bottom: 0.25},
|
|
},
|
|
timeScale: {timeVisible: true, secondsVisible: false},
|
|
crosshair: {
|
|
mode: LightweightCharts.CrosshairMode.Normal,
|
|
vertLine: {
|
|
labelBackgroundColor: 'rgb(46, 46, 46)'
|
|
},
|
|
horzLine: {
|
|
labelBackgroundColor: 'rgb(55, 55, 55)'
|
|
}
|
|
},
|
|
grid: {
|
|
vertLines: {color: 'rgba(29, 30, 38, 5)'},
|
|
horzLines: {color: 'rgba(29, 30, 58, 5)'},
|
|
},
|
|
handleScroll: {vertTouchDrag: true},
|
|
})
|
|
window.addEventListener('resize', function() {
|
|
if (topBar) {
|
|
topBarOffset = chart.topBar.offsetHeight
|
|
}
|
|
chart.chart.resize(window.innerWidth*innerWidth, (window.innerHeight*innerHeight)-topBarOffset)
|
|
});
|
|
chart.series = chart.chart.addCandlestickSeries({color: 'rgb(0, 120, 255)', upColor: up, borderUpColor: up, wickUpColor: up,
|
|
downColor: down, borderDownColor: down, wickDownColor: down, lineWidth: 2,
|
|
})
|
|
chart.volumeSeries = chart.chart.addHistogramSeries({
|
|
color: '#26a69a',
|
|
priceFormat: {type: 'volume'},
|
|
priceScaleId: '',
|
|
})
|
|
chart.chart.priceScale('').applyOptions({
|
|
scaleMargins: {top: 0.8, bottom: 0},
|
|
});
|
|
chart.legend.style.position = 'absolute'
|
|
chart.legend.style.zIndex = 1000
|
|
chart.legend.style.width = `${(chart.scale.width*100)-8}vw`
|
|
chart.legend.style.top = '10px'
|
|
chart.legend.style.left = '10px'
|
|
chart.legend.style.fontFamily = 'Monaco'
|
|
chart.legend.style.fontSize = '11px'
|
|
chart.legend.style.color = 'rgb(191, 195, 203)'
|
|
|
|
chart.wrapper.style.width = `${100*innerWidth}%`
|
|
chart.wrapper.style.height = `${100*innerHeight}%`
|
|
chart.div.style.position = 'relative'
|
|
chart.wrapper.style.display = 'flex'
|
|
chart.wrapper.style.flexDirection = 'column'
|
|
|
|
chart.div.appendChild(chart.legend)
|
|
chart.wrapper.appendChild(chart.div)
|
|
wrapper.append(chart.wrapper)
|
|
|
|
return chart
|
|
}
|
|
function makeHorizontalLine(chart, price, color, width, style, axisLabelVisible, text) {
|
|
let priceLine = {
|
|
price: price,
|
|
color: color,
|
|
lineWidth: width,
|
|
lineStyle: style,
|
|
axisLabelVisible: axisLabelVisible,
|
|
title: text,
|
|
};
|
|
let line = {
|
|
line: chart.series.createPriceLine(priceLine),
|
|
price: price,
|
|
};
|
|
chart.horizontal_lines.push(line)
|
|
}
|
|
function legendItemFormat(num) {
|
|
return num.toFixed(2).toString().padStart(8, ' ')
|
|
}
|
|
"""
|
|
|
|
HTML = f"""
|
|
<!DOCTYPE html>
|
|
<html lang="">
|
|
<head>
|
|
<title>lightweight-charts-python</title>
|
|
<script>{LWC_4_0_1}</script>
|
|
<meta name="viewport" content ="width=device-width, initial-scale=1">
|
|
<style>
|
|
body {{
|
|
margin: 0;
|
|
padding: 0;
|
|
overflow: hidden;
|
|
}}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<script>
|
|
{SCRIPT}
|
|
</script>
|
|
</body>
|
|
</html>"""
|