Hover info is sticky on touch interfaces even after the source graph is changed

On touch interface, hover info displays when a data point is clicked. This is perfect. Although, the info seems to be sticky even after changing the source graph . I haven’t found a straightforward way to change this. I’ve tried using various parameters like clear_on_unhover, hoverData, hoverinfo, selectedpoints. Looks like the interaction gets captured as a click on touch so I tried to work with properties like clickData.

Below is a minimal working example and and some screenshots to illustrate. The app has a dropdown menu and an a graph. The graph changes with the dropdown selection. The hover info lingers even if the graph is change using the dropdown. Ideally, the label could disappear when the source graph is changed. This would be great for a touch interface friendly UX as the hover label is a nice way to pack in more info on a small display like mobile.

Thanks for looking into this! @Coding-with-Adam

# Import modules
import plotly.graph_objs as go
import dash
from dash import dcc
from dash import html
from dash.dependencies import Input, Output

# App layout 
app = dash.Dash(__name__)
app.layout = html.Div([
    dcc.Dropdown(
        id='dropdown',
        options=[
            {'label': 'Graph 1', 'value': 1},
            {'label': 'Graph 2', 'value': 2}
        ],
        value=1
    ),
    dcc.Store(id='click-data-store'),
    dcc.Graph(id='graph')
])
  
# Dropdown graph callback
@app.callback(
  Output('graph', 'figure'),
  [Input('dropdown', 'value')]
)
def update_graph(selected_value):
  figure = go.Figure()

  if selected_value == 1:
      figure.add_trace(go.Bar(x=['ABCT','DEFR','GHIP'], y=[4, 5, 6], name='Graph 1'))
  elif selected_value == 2:
      figure.add_trace(go.Bar(x=['JKWW','STVP','CXYZ'], y=[3, 10, 4], name='Graph 2'))
  
  return figure

# Run app
if __name__ == '__main__':
    app.run_server(debug=False, host="0.0.0.0", port=1005)

首先，在触控界面上运行 issue 中的最小 Dash 应用，选择一个数据点，并更改 dropdown 的源图表。跟踪图表更新如何与捕获的 click 或 hover 状态交互；完成的标准是更改源图表时旧的 hover 标签会消失，同时不会破坏触控 hover 行为。