如何在Plotly Dash中注册鼠标单击和拖动事件？

import dash
from dash.dependencies import Input, Output
import dash_core_components as dcc
import dash_html_components as html
import plotly.graph_objs as go

app = dash.Dash(__name__)

app.layout = html.Div(
    [
        dcc.Graph(
            id='my-graph',
            figure={
                'data': [
                    go.Scatter(
                        x=[1, 2, 3],
                        y=[4, 1, 2],
                        mode='markers',
                        marker={
                            'size': 14
                        }
                    )
                ],
                'layout': go.Layout(
                    title='Plotly Dash - 鼠标事件示例'
                )
            }
        )
    ]
)

@app.callback(
    Output('my-graph', 'figure'),
    [Input('my-graph', 'clickData'),
     Input('my-graph', 'selectedData')]
)
def update_graph(clickData, selectedData):
    # 处理鼠标单击事件
    if clickData:
        # 获取单击的数据点坐标
        x = clickData['points'][0]['x']
        y = clickData['points'][0]['y']
        # 在图表上添加一个新的数据点
        new_point = go.Scatter(
            x=[x],
            y=[y],
            mode='markers',
            marker={
                'size': 14
            }
        )
        # 更新图表数据
        figure['data'].append(new_point)

    # 处理拖动事件
    if selectedData:
        # 获取拖动选中的数据点坐标
        x = [point['x'] for point in selectedData['points']]
        y = [point['y'] for point in selectedData['points']]
        # 在图表上添加一个新的数据线
        new_line = go.Scatter(
            x=x,
            y=y,
            mode='lines',
            line={
                'width': 2
            }
        )
        # 更新图表数据
        figure['data'].append(new_line)

    return figure

if __name__ == '__main__':
    app.run_server(debug=True)