d3.js:如何更改力布局图中的节点表示 [英] d3.js: How to change a nodes' representation in a force-layout graph

问题描述

我正在尝试通过将节点的形状从圆形更改为此强制布局示例单击时的矩形.因此，我不想更改任何数据，而只想替换相应的SVG元素.

I am trying to expand this force layout example by changing a nodes' shape from circle to rectangle when it is clicked. So I don't want to change any data but just want to replace the corresponding SVG element.

我的一种方法是这样的:

One of my approaches looked like this:

     node.on("click", function() {
        this.remove();
        svg.selectAll(".node").data(graph.nodes).enter().append("rect")
                .attr("class", "node")
                .attr("width", 5).attr("height", 5)
                .style("fill", function(d) { return color(d.group); });
    });

因此，我从DOM中删除了SVG元素并重新绑定了数据，为现在缺少的节点添加了一个矩形.

So I removed the SVG element from the DOM and rebound the data, adding a rectangle for the now missing node.

不幸的是，这是行不通的(强制布局未在新元素上设置任何属性)，我也不知道这是否是一种合理的方法.

Unfortunately this does not work (the force layout does not set any properties on the new element) and I have no idea if this a reasonable approach at all.

任何想法如何正确执行此操作?

Any ideas how to do this properly?

推荐答案

尝试这种方式.

node.on("click", function(d) {
  var size = d.weight * 2 + 12;
  d3.select(this).select("circle").remove();
  d3.select(this).append("rect")
    .attr("x", -(size / 2))
    .attr("y", -(size / 2))
    .attr("height", size)
    .attr("width", size)
    .style("fill", function(d) {
      return color(1 / d.rating);
    });
});

工作代码段-

var graph = {
  "nodes": [{
    "name": "1",
    "rating": 90,
    "id": 2951
  }, {
    "name": "2",
    "rating": 80,
    "id": 654654
  }, {
    "name": "3",
    "rating": 80,
    "id": 6546544
  }, {
    "name": "4",
    "rating": 1,
    "id": 68987978
  }, {
    "name": "5",
    "rating": 1,
    "id": 9878933
  }, {
    "name": "6",
    "rating": 1,
    "id": 6161
  }, {
    "name": "7",
    "rating": 1,
    "id": 64654
  }, {
    "name": "8",
    "rating": 20,
    "id": 354654
  }, {
    "name": "9",
    "rating": 50,
    "id": 8494
  }, {
    "name": "10",
    "rating": 1,
    "id": 6846874
  }, {
    "name": "11",
    "rating": 1,
    "id": 5487
  }, {
    "name": "12",
    "rating": 80,
    "id": "parfum_kenzo"
  }, {
    "name": "13",
    "rating": 1,
    "id": 65465465
  }, {
    "name": "14",
    "rating": 90,
    "id": "jungle_de_kenzo"
  }, {
    "name": "15",
    "rating": 20,
    "id": 313514
  }, {
    "name": "16",
    "rating": 40,
    "id": 36543614
  }, {
    "name": "17",
    "rating": 100,
    "id": "Yann_YA645"
  }, {
    "name": "18",
    "rating": 1,
    "id": 97413
  }, {
    "name": "19",
    "rating": 1,
    "id": 97414
  }, {
    "name": "20",
    "rating": 100,
    "id": 976431231
  }, {
    "name": "21",
    "rating": 1,
    "id": 9416
  }, {
    "name": "22",
    "rating": 1,
    "id": 998949
  }, {
    "name": "23",
    "rating": 100,
    "id": 984941
  }, {
    "name": "24",
    "rating": 100,
    "id": "99843"
  }, {
    "name": "25",
    "rating": 1,
    "id": 94915
  }, {
    "name": "26",
    "rating": 1,
    "id": 913134
  }, {
    "name": "27",
    "rating": 1,
    "id": 9134371
  }],
  "links": [{
    "source": 6,
    "target": 5,
    "value": 6,
    "label": "publishedOn"
  }, {
    "source": 8,
    "target": 5,
    "value": 6,
    "label": "publishedOn"
  }, {
    "source": 7,
    "target": 1,
    "value": 4,
    "label": "containsKeyword"
  }, {
    "source": 8,
    "target": 10,
    "value": 3,
    "label": "containsKeyword"
  }, {
    "source": 7,
    "target": 14,
    "value": 4,
    "label": "publishedBy"
  }, {
    "source": 8,
    "target": 15,
    "value": 6,
    "label": "publishedBy"
  }, {
    "source": 9,
    "target": 1,
    "value": 6,
    "label": "depicts"
  }, {
    "source": 10,
    "target": 1,
    "value": 6,
    "label": "depicts"
  }, {
    "source": 16,
    "target": 1,
    "value": 6,
    "label": "manageWebsite"
  }, {
    "source": 16,
    "target": 2,
    "value": 5,
    "label": "manageWebsite"
  }, {
    "source": 16,
    "target": 3,
    "value": 6,
    "label": "manageWebsite"
  }, {
    "source": 16,
    "target": 4,
    "value": 6,
    "label": "manageWebsite"
  }, {
    "source": 19,
    "target": 18,
    "value": 2,
    "label": "postedOn"
  }, {
    "source": 18,
    "target": 1,
    "value": 6,
    "label": "childOf"
  }, {
    "source": 17,
    "target": 19,
    "value": 8,
    "label": "describes"
  }, {
    "source": 18,
    "target": 11,
    "value": 6,
    "label": "containsKeyword"
  }, {
    "source": 17,
    "target": 13,
    "value": 3,
    "label": "containsKeyword"
  }, {
    "source": 20,
    "target": 13,
    "value": 3,
    "label": "containsKeyword"
  }, {
    "source": 20,
    "target": 21,
    "value": 3,
    "label": "postedOn"
  }, {
    "source": 22,
    "target": 20,
    "value": 3,
    "label": "postedOn"
  }, {
    "source": 23,
    "target": 21,
    "value": 3,
    "label": "manageWebsite"
  }, {
    "source": 23,
    "target": 24,
    "value": 3,
    "label": "manageWebsite"
  }, {
    "source": 23,
    "target": 25,
    "value": 3,
    "label": "manageWebsite"
  }, {
    "source": 23,
    "target": 26,
    "value": 3,
    "label": "manageWebsite"
  }]
}


var margin = {
  top: -5,
  right: -5,
  bottom: -5,
  left: -5
};
var width = 500 - margin.left - margin.right,
  height = 400 - margin.top - margin.bottom;

var color = d3.scale.category20();

var force = d3.layout.force()
  .charge(-200)
  .linkDistance(50)
  .size([width + margin.left + margin.right, height + margin.top + margin.bottom]);

var zoom = d3.behavior.zoom()
  .scaleExtent([1, 10])
  .on("zoom", zoomed);

var drag = d3.behavior.drag()
  .origin(function(d) {
    return d;
  })
  .on("dragstart", dragstarted)
  .on("drag", dragged)
  .on("dragend", dragended);


var svg = d3.select("#map").append("svg")
  .attr("width", width + margin.left + margin.right)
  .attr("height", height + margin.top + margin.bottom)
  .append("g")
  .attr("transform", "translate(" + margin.left + "," + margin.right + ")")
  .call(zoom);

var rect = svg.append("rect")
  .attr("width", width)
  .attr("height", height)
  .style("fill", "none")
  .style("pointer-events", "all");

var container = svg.append("g");

//d3.json('http://blt909.free.fr/wd/map2.json', function(error, graph) {

force
  .nodes(graph.nodes)
  .links(graph.links)
  .start();



var link = container.append("g")
  .attr("class", "links")
  .selectAll(".link")
  .data(graph.links)
  .enter().append("line")
  .attr("class", "link")
  .style("stroke-width", function(d) {
    return Math.sqrt(d.value);
  });

var node = container.append("g")
  .attr("class", "nodes")
  .selectAll(".node")
  .data(graph.nodes)
  .enter().append("g")
  .attr("class", "node")
  .attr("cx", function(d) {
    return d.x;
  })
  .attr("cy", function(d) {
    return d.y;
  })
  .call(drag);

node.append("circle")
  .attr("r", function(d) {
    return d.weight * 2 + 12;
  })
  .style("fill", function(d) {
    return color(1 / d.rating);
  });


force.on("tick", function() {
  link.attr("x1", function(d) {
      return d.source.x;
    })
    .attr("y1", function(d) {
      return d.source.y;
    })
    .attr("x2", function(d) {
      return d.target.x;
    })
    .attr("y2", function(d) {
      return d.target.y;
    });

  node.attr("transform", function(d) {
    return "translate(" + d.x + "," + d.y + ")";
  });
});

var linkedByIndex = {};
graph.links.forEach(function(d) {
  linkedByIndex[d.source.index + "," + d.target.index] = 1;
});

function isConnected(a, b) {
  return linkedByIndex[a.index + "," + b.index] || linkedByIndex[b.index + "," + a.index];
}

node.on("click", function(d) {
  var size = d.weight * 2 + 12;
  d3.select(this).select("circle").remove();
  d3.select(this).append("rect")
    .attr("x", -(size / 2))
    .attr("y", -(size / 2))
    .attr("height", size)
    .attr("width", size)
    .style("fill", function(d) {
      return color(1 / d.rating);
    });
});

function dottype(d) {
  d.x = +d.x;
  d.y = +d.y;
  return d;
}

function zoomed() {
  container.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}

function dragstarted(d) {
  d3.event.sourceEvent.stopPropagation();

  d3.select(this).classed("dragging", true);
  force.start();
}

function dragged(d) {

  d3.select(this).attr("cx", d.x = d3.event.x).attr("cy", d.y = d3.event.y);

}

function dragended(d) {

  d3.select(this).classed("dragging", false);
}

.node {
  stroke: #fff;
  stroke-width: 1.5px;
}
.node-active {
  stroke: #555;
  stroke-width: 1.5px;
}
.link {
  stroke: #555;
  stroke-opacity: .3;
}
.link-active {
  stroke-opacity: 1;
}
.overlay {
  fill: none;
  pointer-events: all;
}
#map {
  border: 2px #555 dashed;
  width: 500px;
  height: 400px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>

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

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