如何在虚线图中将事件处理程序设置为被动,以避免跳过数据点

2024-07-07 07:51:53 发布

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我正在使用python中的dash plotly来绘制线图,我正在使用图的extendData属性来更新跟踪,以避免重新绘制图。我面临一个问题,图形跳过几个数据点。我还收到一些控制台警告,如下所示

async-plotlyjs.v1_16_0m1617903285.js:2 [Violation] Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952

async-plotlyjs.v1_16_0m1617903285.js:2 [Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952

我认为跳过数据点的原因是这种警告,因为它可能会阻止回调被调用。当我从graph选项卡移动到另一个选项卡时(假设我从graph选项卡移动到StackOverflow选项卡),会跳过更多的数据点。如何防止这种情况发生?或者,如果有其他方法可以做到这一点,请随时张贴在评论

这些是它提供一个数据点的屏幕截图

data point 99

skipped data point 100

data point 101

仅供参考,我正在使用 谷歌Chrome版本92.0.4515.107(官方版本)(64位) 但这个问题在其他浏览器上也一直存在

下面提到的是代码

import random
import webbrowser
import dash
import dash_bootstrap_components as dbc
import numpy as np
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Output, Input, State

app = dash.Dash(__name__,suppress_callback_exceptions=True)
app.layout = html.Div([
    dbc.Row([
        dbc.Col([
            dcc.Graph(
                id='graph-voltage',
                figure={
                    'layout': {
                        'title': 'Voltage',
                        'xaxis': {
                            'title': 'Time'
                        },
                        'yaxis': {
                            'title': 'Voltage in V',
                            'range': [0, 5],
                        }
                    },
                    'data': [{'name': 'Cell 01', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 02', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 03', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 04', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 05', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 06', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 07', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 08', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 09', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 10', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 11', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 12', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 13', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 14', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 15', 'type': 'line', 'x': [], 'y': []},
                             {'name': 'Cell 16', 'type': 'line', 'x': [], 'y': []},
                             ]
                }
            ),
        ], ),
    ]),
    dcc.Interval(
        id='interval-graph-update',
        interval=0.5 * 1000,
        n_intervals=0),
])


@app.callback(Output('graph-voltage', 'extendData'),
              [Input('interval-graph-update', 'n_intervals')]
              )
def extend_single_trace(n_intervals):
    CVT_CELL1 = np.array([])
    CVT_CELL2 = np.array([])
    CVT_CELL3 = np.array([])
    CVT_CELL4 = np.array([])
    CVT_CELL5 = np.array([])
    CVT_CELL6 = np.array([])
    CVT_CELL7 = np.array([])
    CVT_CELL8 = np.array([])
    CVT_CELL9 = np.array([])
    CVT_CELL10 = np.array([])
    CVT_CELL11 = np.array([])
    CVT_CELL12 = np.array([])
    CVT_CELL13 = np.array([])
    CVT_CELL14 = np.array([])
    CVT_CELL15 = np.array([])
    CVT_CELL16 = np.array([])
    CVT_TIME_STAMP = np.array([])

    CVT_CELL1 = np.append(CVT_CELL1, random.randint(0,5))
    CVT_CELL2 = np.append(CVT_CELL2, random.randint(0,5))
    CVT_CELL3 = np.append(CVT_CELL3, random.randint(0,5))
    CVT_CELL4 = np.append(CVT_CELL4, random.randint(0,5))
    CVT_CELL5 = np.append(CVT_CELL5, random.randint(0,5))
    CVT_CELL6 = np.append(CVT_CELL6, random.randint(0,5))
    CVT_CELL7 = np.append(CVT_CELL7, random.randint(0,5))
    CVT_CELL8 = np.append(CVT_CELL8, random.randint(0,5))
    CVT_CELL9 = np.append(CVT_CELL9, random.randint(0,5))
    CVT_CELL10 = np.append(CVT_CELL10, random.randint(0,5))
    CVT_CELL11 = np.append(CVT_CELL11, random.randint(0,5))
    CVT_CELL12 = np.append(CVT_CELL12, random.randint(0,5))
    CVT_CELL13 = np.append(CVT_CELL13, random.randint(0,5))
    CVT_CELL14 = np.append(CVT_CELL14, random.randint(0,5))
    CVT_CELL15 = np.append(CVT_CELL15, random.randint(0,5))
    CVT_CELL16 = np.append(CVT_CELL16, random.randint(0,5))
    CVT_TIME_STAMP = np.append(CVT_TIME_STAMP, n_intervals)

    return (dict(x=[CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP,
                    CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP,
                    CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, CVT_TIME_STAMP, ],
                 y=[CVT_CELL1, CVT_CELL2, CVT_CELL3, CVT_CELL4, CVT_CELL5, CVT_CELL6, CVT_CELL7, CVT_CELL8, CVT_CELL9,
                    CVT_CELL10, CVT_CELL11, CVT_CELL12, CVT_CELL13, CVT_CELL14, CVT_CELL15, CVT_CELL16],
                 )
            )


if __name__ == "__main__":
    webbrowser.open('http://127.0.0.1:5050/')
    app.run_server(port=5050, debug=True, use_reloader=False)

任何帮助都将不胜感激, 提前谢谢


Tags: nameimporteventtimestamptypenpline