plotly / plotly/plotly.py

Scattergl Hover:closest and Click only active with first-plotted trace

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bug P3
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描述

EDIT
Problem:
Scattergl hover and click functionalities are only available for the first-plotted trace if one has multiple traces but does not matter when using Scatter.
/EDIT

I am using plotly 4.4.1 and was trying out the network demo on the plotly website. Since I have lots of nodes and edges in my graph, I tried using Scattergl instead.

This works and speeds up the plotting but disables the tool tips on hover on hovermode="closest". The hover does however still find the points, which we can see when we press "Toggle Spike Lines", which snap onto the point our cursor is closest to.

Clicking on the "compare data on hover" button let's tool tips appear but this is a very erratic experience when we have a lot of points close to each other.

EDIT: I have produced a smaller code example in the next comment on this thread.

Not sure if this was addressed in https://github.com/plotly/plotly.js/pull/4323 which should be part of my version (4.4.1).
Below is the network demo with Scatter substituted for Scattergl, which can reproduce my issue:

import plotly.graph_objects as go

import networkx as nx

G = nx.random_geometric_graph(200, 0.125)
edge_x = []
edge_y = []
for edge in G.edges():
    x0, y0 = G.nodes[edge[0]]['pos']
    x1, y1 = G.nodes[edge[1]]['pos']
    edge_x.append(x0)
    edge_x.append(x1)
    edge_x.append(None)
    edge_y.append(y0)
    edge_y.append(y1)
    edge_y.append(None)

edge_trace = go.Scattergl(
    x=edge_x, y=edge_y,
    line=dict(width=0.5, color='#888'),
    hoverinfo='none',
    mode='lines')

node_x = []
node_y = []
for node in G.nodes():
    x, y = G.nodes[node]['pos']
    node_x.append(x)
    node_y.append(y)

node_trace = go.Scattergl(
    x=node_x, y=node_y,
    mode='markers',
    hoverinfo='text',
    marker=dict(
        showscale=True,
        # colorscale options
        #'Greys' | 'YlGnBu' | 'Greens' | 'YlOrRd' | 'Bluered' | 'RdBu' |
        #'Reds' | 'Blues' | 'Picnic' | 'Rainbow' | 'Portland' | 'Jet' |
        #'Hot' | 'Blackbody' | 'Earth' | 'Electric' | 'Viridis' |
        colorscale='YlGnBu',
        reversescale=True,
        color=[],
        size=10,
        colorbar=dict(
            thickness=15,
            title='Node Connections',
            xanchor='left',
            titleside='right'
        ),
        line_width=2))
node_adjacencies = []
node_text = []
for node, adjacencies in enumerate(G.adjacency()):
    node_adjacencies.append(len(adjacencies[1]))
    node_text.append('# of connections: '+str(len(adjacencies[1])))

node_trace.marker.color = node_adjacencies
node_trace.text = node_text
fig = go.Figure(data=[edge_trace, node_trace],
             layout=go.Layout(
                title='<br>Network graph made with Python',
                titlefont_size=16,
                showlegend=False,
                hovermode='closest',
                margin=dict(b=20,l=5,r=5,t=40),
                annotations=[ dict(
                    text="Python code: <a href='https://plot.ly/ipython-notebooks/network-graphs/'> https://plot.ly/ipython-notebooks/network-graphs/</a>",
                    showarrow=False,
                    xref="paper", yref="paper",
                    x=0.005, y=-0.002 ) ],
                xaxis=dict(showgrid=False, zeroline=False, showticklabels=False),
                yaxis=dict(showgrid=False, zeroline=False, showticklabels=False))
                )
fig.show()

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调研方向

首先运行提供的 Python 网络图示例,使用多个 Scattergl trace 和 hovermode="closest"。检查 Scattergl 的 hover 和 click 入口,包括 plotly.js PR 4323 的相关上下文,并将其与 Scatter 的行为进行比较。完成的标准是 hover 工具提示和点击能够作用于适当的 trace,而不只是第一个绘制的 trace。

由索引模型根据 Issue 内容生成。

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技术栈
python
领域
data-visualization
Issue 类型
缺陷
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4/5
预计耗时
3-5 天
活跃度
停滞
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