cytoscape.js/react 中不会捕获核心事件

Question

我正在用 react-cytoscapejs 重构旧代码。过去可以在 cytoscape 中识别空 space 上的点击。

cy.on('tap' , 'core', function(e){
    console.log("Click on Core", e, e.target.length);
});

现在在 cytoscape 中单击空 space 时它不起作用 - 有趣：它在单击节点时起作用。

我在参考资料中找不到任何东西，你知道它现在是如何工作的吗？

谢谢！

编辑添加：在长运行中，我需要它与使用核心作为选择器的上下文菜单一起工作（并且它有效）in line 121

Answer 1

您可以只使用普通点击事件而不指定目标。这样，您就可以获得所有事件并可以从那里进行过滤：

var cy = window.cy = cytoscape({
  container: document.getElementById('cy'),

  boxSelectionEnabled: false,
  autounselectify: true,

  style: [{
      selector: 'node',
      css: {
        'content': 'data(id)',
        'text-valign': 'center',
        'text-halign': 'center',
        'height': '60px',
        'width': '60px',
        'border-color': 'black',
        'border-opacity': '1',
        'border-width': '10px'
      }
    },
    {
      selector: '$node > node',
      css: {
        'padding-top': '10px',
        'padding-left': '10px',
        'padding-bottom': '10px',
        'padding-right': '10px',
        'text-valign': 'top',
        'text-halign': 'center',
        'background-color': '#bbb'
      }
    },
    {
      selector: 'edge',
      css: {
        'target-arrow-shape': 'triangle'
      }
    },
    {
      selector: ':selected',
      css: {
        'background-color': 'black',
        'line-color': 'black',
        'target-arrow-color': 'black',
        'source-arrow-color': 'black'
      }
    }
  ],

  elements: {
    nodes: [{
        data: {
          id: 'n0'
        }
      },
      {
        data: {
          id: 'n1'
        }
      },
      {
        data: {
          id: 'n2'
        }
      },
      {
        data: {
          id: 'n3'
        }
      },
      {
        data: {
          id: 'n4'
        }
      },
      {
        data: {
          id: 'n5'
        }
      },
      {
        data: {
          id: 'n6'
        }
      },
      {
        data: {
          id: 'n7'
        }
      },
      {
        data: {
          id: 'n8'
        }
      },
      {
        data: {
          id: 'n9'
        }
      },
      {
        data: {
          id: 'n10'
        }
      },
      {
        data: {
          id: 'n11'
        }
      },
      {
        data: {
          id: 'n12'
        }
      },
      {
        data: {
          id: 'n13'
        }
      },
      {
        data: {
          id: 'n14'
        }
      },
      {
        data: {
          id: 'n15'
        }
      },
      {
        data: {
          id: 'n16'
        }
      }
    ],
    edges: [{
        data: {
          source: 'n0',
          target: 'n1'
        }
      },
      {
        data: {
          source: 'n1',
          target: 'n2'
        }
      },
      {
        data: {
          source: 'n1',
          target: 'n3'
        }
      },
      {
        data: {
          source: 'n2',
          target: 'n7'
        }
      },
      {
        data: {
          source: 'n2',
          target: 'n11'
        }
      },
      {
        data: {
          source: 'n2',
          target: 'n16'
        }
      },
      {
        data: {
          source: 'n3',
          target: 'n4'
        }
      },
      {
        data: {
          source: 'n3',
          target: 'n16'
        }
      },
      {
        data: {
          source: 'n4',
          target: 'n5'
        }
      },
      {
        data: {
          source: 'n4',
          target: 'n6'
        }
      },
      {
        data: {
          source: 'n6',
          target: 'n8'
        }
      },
      {
        data: {
          source: 'n8',
          target: 'n9'
        }
      },
      {
        data: {
          source: 'n8',
          target: 'n10'
        }
      },
      {
        data: {
          source: 'n11',
          target: 'n12'
        }
      },
      {
        data: {
          source: 'n12',
          target: 'n13'
        }
      },
      {
        data: {
          source: 'n13',
          target: 'n14'
        }
      },
      {
        data: {
          source: 'n13',
          target: 'n15'
        }
      },
    ]
  },

  layout: {
    name: 'dagre',
    padding: 5
  }
});

cy.off('tap')
cy.on('tap', function(e) {
  // target holds a reference to the originator
  // of the event (core or element)
  var target = e.target;

  if (target === cy) {
    console.log('tap on background');
  } else {
    console.log('tap on some element');
  }
});

body {
  font: 14px helvetica neue, helvetica, arial, sans-serif;
}

#cy {
  height: 100%;
  width: 75%;
  position: absolute;
  left: 0;
  top: 0;
  float: left;
}

<html>

<head>
  <meta charset=utf-8 />
  <meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/cytoscape/3.2.17/cytoscape.min.js"></script>
  <script src="https://unpkg.com/jquery@3.3.1/dist/jquery.js"></script>
  <script src="https://unpkg.com/dagre@0.7.4/dist/dagre.js"></script>
  <script src="https://cdn.rawgit.com/cytoscape/cytoscape.js-dagre/1.5.0/cytoscape-dagre.js"></script>
</head>

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

</html>

cytoscape.js/react 中不会捕获核心事件

events on core do not get captured in cytoscape.js / react

cytoscape.js