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)

まず、issue にある最小限の Dash アプリをタッチインターフェース上で実行し、データポイントを選択して、dropdown のソースグラフを変更します。グラフの更新が取得された click または hover の状態とどのように相互作用するかを追跡します。ソースグラフを変更したときに古い hover ラベルが消え、タッチでの hover 動作を壊さなければ完了です。