python - 使用 Dash-Cytoscape 更改单个节点大小

Question

我已经使用 Dash-Cytoscape 两天了，我尝试了很多方法来单独更改节点大小。我试过了，但没用:

import dash
import dash_cytoscape as cyto
import dash_html_components as html

app = dash.Dash(__name__)
app.layout = html.Div([
    cyto.Cytoscape(
        id="cytospace",
        elements=[
            {'data': {'id': 'one', 'label': 'Node 1'}, 'position': {'x': 50, 'y': 50}, 'size':20},
            {'data': {'id': 'two', 'label': 'Node 2'}, 'position': {'x': 200, 'y': 200}, 'size':70},
            {'data': {'source': 'one', 'target': 'two','label': 'Node 1 to 2'}}
        ],
        layout={'name':'preset'},
        style={'height': '95vh',
               'width': '100%'}
    )
])

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

Answer 1

这是一个更详细和通用的版本。您可以通过 CSS 样式更改单个节点的大小。您可以编辑单个节点的宽度和高度属性。如果您已经将大小存储在元素数据中，请使用 mappers 将存储的数据映射到节点大小.这是我在 Cytoscape.js 文档中找到的内容。

mapData() specifies a linear mapping to an element’s data field. For example, mapData(weight, 0, 100, blue, red) maps an element’s weight to colours between blue and red for weights between 0 and 100. An element with ele.data("weight") === 0 would be mapped to blue, for instance. Elements whose values fall outside of the specified range are mapped to the extremity values. In the previous example, an element with ele.data("weight") === -1 would be mapped to blue.

import dash
import dash_cytoscape as cyto
import dash_html_components as html

app = dash.Dash(__name__)

default_stylesheet = [
    {
        "selector": "node",
        "style": {
            "width": "mapData(size, 0, 100, 20, 60)",
            "height": "mapData(size, 0, 100, 20, 60)",
            "content": "data(label)",
            "font-size": "12px",
            "text-valign": "center",
            "text-halign": "center",
        }
    }
]

app.layout = html.Div([
    cyto.Cytoscape(
        id="cytospace",
        elements=[
            {'data': {'id': 'one', 'label': 'Node 1', 'size': 10}, 'position': {'x': 50, 'y': 50}},
            {'data': {'id': 'two', 'label': 'Node 2', 'size': 120}, 'position': {'x': 200, 'y': 200}},
            {'data': {'source': 'one', 'target': 'two','label': 'Node 1 to 2'}}
        ],
        layout={'name':'preset'},
        stylesheet=default_stylesheet
    )
])

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