如何在cytoscape.js中的节点外部使用背景图片

debugcn 发表于 Dev

是否

我需要将三个图像设置为节点的背景，并编写以下代码段。中间是主图像，左侧和右侧是辅助图像。

我希望左右两个图像不在节点边界区域之内并且在节点边界附近。我试图用设置期望的位置background-position-x。但是，当移出节点边界时，图像将被裁剪。

我尝试了"background-clip": "none"和"background-clip": ["none", "none", "none"]，但两者都没有帮助。

有什么想法要解决吗？谢谢。

document.addEventListener("DOMContentLoaded", function() {
  var cy = (window.cy = cytoscape({
    container: document.getElementById("cy"),

    ready: function() {
    },

    style: [{
        selector: "node",
        style: {
            "border-color": "#B0B0B0",
            "border-width": "1px",
            "border-style": "solid",
            "background-color": "#FFF",
            "background-fit": "none",
            "font-size": "12px",
            "text-max-width": "120px",
            "text-wrap": "ellipsis",
            "text-events": "yes",
            "text-margin-y": "5px",
            "min-zoomed-font-size": "7px",
            "text-halign": "center",
            "text-valign": "bottom",
            "background-image": ['https://js.cytoscape.org/img/cytoscape-logo.svg','https://upload.wikimedia.org/wikipedia/commons/6/6d/Windows_Settings_app_icon.png','https://www.flaticon.com/premium-icon/icons/svg/1688/1688124.svg'],
            "background-width": ["24px", "20px", "20px"],
            "background-height": ["24px", "20px", "20px"],
            "background-position-x": ["12px", "-15px", "40px"],
            "background-position-y": ["12px", "14px", "14px"],
            // "background-clip": ["none", "none", "none"],
            "background-clip": "none",
            width: "48px",
            height: "48px",
            padding: "0px",

        }
      },
    ],

    elements: [{
        group: "nodes",
        data: {
          id: "n0"
        }
      },
    ],
  }));
  
});

body {
  font-family: helvetica;
  font-size: 14px;
}

#cy {
  height: 100%;
  width: 100%;
  position: absolute;
}

<script src="https://unpkg.com/cytoscape/dist/cytoscape.min.js"></script>

<!--polyfills are needed for this extension for old browsers like IE -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.5.7/shim.min.js"></script>

<body>
  <div id="cy"></div>

</body>

Maxkfranz

从https://js.cytoscape.org/#style/background-image：

要将图像放置在节点主体的边界之外，必须为超出节点边界框n个像素的图像指定background-clip：none和bounds-expansion：n。请注意，n的值应相对较小以提高性能。

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