D3树：编辑树节点数据

Question

我使用D3.js v4从平面数据创建树。 Stratify用于将平面数据转换为树所需的层次结构。 树中的节点具有未显示的附加数据字段（分数）。 单击叶节点时，将显示节点的分数（通过单独的<div>中的范围滑块。 我希望能够使用输入（范围滑块）来更改所选节点的得分值。 应在节点的数据字段中更新任何更改（存储在JSON树数据中），以便在再次单击该节点时显示新值。

我创建了以下示例来显示问题：

https://jsfiddle.net/shorgy/2d5epdqp/

// the flat data

var flatData = [

  {
    "name": "Root",
    "parent": null,
    "category": "test",
    "score": null
  },
  {
    "name": "Child 1",
    "parent": "Root",
    "category": "test",
    "score": "2"
  },
  {
    "name": "Child 2",
    "parent": "Root",
    "category": "test",
    "score": "3"
  },
  {
    "name": "Child 3",
    "parent": "Root",
    "category": "test",
    "score": "4"
  },

];


// convert the flat data into a hierarchy

var tree = d3.stratify()
  .id(function(d) { return d.name; })
  .parentId(function(d) { return d.parent; })

var treeData = tree(flatData);




// assign the name to each node
treeData.each(function(d) {
    d.name = d.id;
  });



// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 60, bottom: 30, left: 110},
    width = document.getElementById("tree").clientWidth - margin.left - margin.right,
    height = document.getElementById("tree").clientHeight - margin.top - margin.bottom;

// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select('div#tree').append("svg")
  .attr("width", width + margin.right + margin.left)
  .attr("height", height + margin.top + margin.bottom)
  .append("g")
  .attr("transform", "translate("
    + margin.left + "," + margin.top + ")");

var i = 0,
    duration = 750,
    root;

// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);

// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) { return d.children; });
root.x0 = height / 2;
root.y0 = 0;


// Collapse after the second level
root.children.forEach(collapse);

update(root);

// Collapse the node and all it's children
function collapse(d) {
  if(d.children) {
    d._children = d.children
    d._children.forEach(collapse)
    d.children = null
  }
}



function update(source) {

  // Assigns the x and y position for the nodes
  var treeData = treemap(root);

  // Compute the new tree layout.
  var nodes = treeData.descendants(),
      links = treeData.descendants().slice(1);

  // Normalize for fixed-depth.
  nodes.forEach(function(d){ d.y = d.depth * 250});





  // ****************** Nodes section ***************************

  // Update the nodes...
  var node = svg.selectAll('g.node')
      .data(nodes, function(d) {return d.id || (d.id = ++i); });

  // Enter any new modes at the parent's previous position.
  var nodeEnter = node.enter().append('g')
      .attr('class', 'node')
      .attr("transform", function(d) {
        return "translate(" + source.y0 + "," + source.x0 + ")";
    })
    .on('click', click);

  // Add Circle for the nodes
  nodeEnter.append('circle')
      .attr('class', 'node')
      .attr('r', 1e-6)
      .style("fill", function(d) {
          return d._children ? "lightsteelblue" : "#fff";
      });

  // Add labels for the nodes
  nodeEnter.append('text')
      .attr("dy", ".375em")
      .attr("x", function(d) {
          return d.children || d._children ? -13 : 13;
      })
      .attr("text-anchor", function(d) {
          return d.children || d._children ? "end" : "start";
      })
      .text(function(d) { return d.data.name; });

  // UPDATE
  var nodeUpdate = nodeEnter.merge(node);

  // Transition to the proper position for the node
  nodeUpdate.transition()
    .duration(duration)
    .attr("transform", function(d) { 
        return "translate(" + d.y + "," + d.x + ")";
     });

  // Update the node attributes and style
  nodeUpdate.select('circle.node')
    .attr('r', 8)
    .style("fill", function(d) {
        return d._children ? "lightsteelblue" : "#fff";
    })
    .attr('cursor', 'pointer');


  // Remove any exiting nodes
  var nodeExit = node.exit().transition()
      .duration(duration)
      .attr("transform", function(d) {
          return "translate(" + source.y + "," + source.x + ")";
      })
      .remove();

  // On exit reduce the node circles size to 0
  nodeExit.select('circle')
    .attr('r', 1e-6);

  // On exit reduce the opacity of text labels
  nodeExit.select('text')
    .style('fill-opacity', 1e-6);

  // ****************** links section ***************************

  // Update the links...
  var link = svg.selectAll('path.link')
      .data(links, function(d) { return d.id; });

  // Enter any new links at the parent's previous position.
  var linkEnter = link.enter().insert('path', "g")
      .attr("class", "link")
      .attr('d', function(d){
        var o = {x: source.x0, y: source.y0}
        return diagonal(o, o)
      });

  // UPDATE
  var linkUpdate = linkEnter.merge(link);

  // Transition back to the parent element position
  linkUpdate.transition()
      .duration(duration)
      .attr('d', function(d){ return diagonal(d, d.parent) });

  // Remove any exiting links
  var linkExit = link.exit().transition()
      .duration(duration)
      .attr('d', function(d) {
        var o = {x: source.x, y: source.y}
        return diagonal(o, o)
      })
      .remove();

  // Store the old positions for transition.
  nodes.forEach(function(d){
    d.x0 = d.x;
    d.y0 = d.y;
  });

  // Creates a curved (diagonal) path from parent to the child nodes
  function diagonal(s, d) {

    path = `M ${s.y} ${s.x}
            C ${(s.y + d.y) / 2} ${s.x},
              ${(s.y + d.y) / 2} ${d.x},
              ${d.y} ${d.x}`

    return path
  }

  // Toggle children on click.
  function click(d) {
    if (d.children) {
        //parent node, children expanded so collapse
        d._children = d.children;
        d.children = null;
        zzz();
      } else {
        //children not expanded (expand) or no children (nothing)
        if (d._children) { //if children exist but not shown (node is a parent node)
          d.children = d._children;
          d._children = null;
          zzz();
        } else { //if no c=children (i.e. node is a leaf node)
          //display node information in another div.
          //alert("score = " + d.data.data.score + " , category = " + d.data.data.category );
          xxx(d.data.name, d.data.data.score);
        }
      }
    update(d);
  }
}

function xxx(node, score) {
  $(".nist_cat").css({"display": "block"});
  //changevalue pscore_text to be node
  document.getElementById("pscore_text").textContent = node;
  //change value of pscore to be score
  document.getElementById("pscore").value = score;
}


function yyy(new_value){

}

function zzz() {
    $(".nist_cat").css({"display": "none"});
}

总结 - 如何使用范围滑块中的输入值实际更改所选节点的关联分数值？

Answer 1

不是将值传递给xxx函数，而是传递基准对象。

function click(d){
    //more code
    xxx(d)
}

这样，您可以在移动滑块时更改它：

d3.select("#pscore").on("change", function() {
    d.data.data.score = this.value;
})

以下是您更改的代码：

// the flat data

var flatData = [

  {
    "name": "Root",
    "parent": null,
    "category": "test",
    "score": null
  },
  {
    "name": "Child 1",
    "parent": "Root",
    "category": "test",
    "score": "2"
  },
  {
    "name": "Child 2",
    "parent": "Root",
    "category": "test",
    "score": "3"
  },
  {
    "name": "Child 3",
    "parent": "Root",
    "category": "test",
    "score": "4"
  },

];


// convert the flat data into a hierarchy

var tree = d3.stratify()
  .id(function(d) {
    return d.name;
  })
  .parentId(function(d) {
    return d.parent;
  })

var treeData = tree(flatData);




// assign the name to each node
treeData.each(function(d) {
  d.name = d.id;
});



// Set the dimensions and margins of the diagram
var margin = {
    top: 20,
    right: 60,
    bottom: 30,
    left: 110
  },
  width = document.getElementById("tree").clientWidth - margin.left - margin.right,
  height = document.getElementById("tree").clientHeight - margin.top - margin.bottom;

// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select('div#tree').append("svg")
  .attr("width", width + margin.right + margin.left)
  .attr("height", height + margin.top + margin.bottom)
  .append("g")
  .attr("transform", "translate(" +
    margin.left + "," + margin.top + ")");

var i = 0,
  duration = 750,
  root;

// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);

// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) {
  return d.children;
});
root.x0 = height / 2;
root.y0 = 0;


// Collapse after the second level
root.children.forEach(collapse);

update(root);

// Collapse the node and all it's children
function collapse(d) {
  if (d.children) {
    d._children = d.children
    d._children.forEach(collapse)
    d.children = null
  }
}

function update(source) {

  // Assigns the x and y position for the nodes
  var treeData = treemap(root);

  // Compute the new tree layout.
  var nodes = treeData.descendants(),
    links = treeData.descendants().slice(1);

  // Normalize for fixed-depth.
  nodes.forEach(function(d) {
    d.y = d.depth * 250
  });

  // ****************** Nodes section ***************************

  // Update the nodes...
  var node = svg.selectAll('g.node')
    .data(nodes, function(d) {
      return d.id || (d.id = ++i);
    });

  // Enter any new modes at the parent's previous position.
  var nodeEnter = node.enter().append('g')
    .attr('class', 'node')
    .attr("transform", function(d) {
      return "translate(" + source.y0 + "," + source.x0 + ")";
    })
    .on('click', click);

  // Add Circle for the nodes
  nodeEnter.append('circle')
    .attr('class', 'node')
    .attr('r', 1e-6)
    .style("fill", function(d) {
      return d._children ? "lightsteelblue" : "#fff";
    });

  // Add labels for the nodes
  nodeEnter.append('text')
    .attr("dy", ".375em")
    .attr("x", function(d) {
      return d.children || d._children ? -13 : 13;
    })
    .attr("text-anchor", function(d) {
      return d.children || d._children ? "end" : "start";
    })
    .text(function(d) {
      return d.data.name;
    });

  // UPDATE
  var nodeUpdate = nodeEnter.merge(node);

  // Transition to the proper position for the node
  nodeUpdate.transition()
    .duration(duration)
    .attr("transform", function(d) {
      return "translate(" + d.y + "," + d.x + ")";
    });

  // Update the node attributes and style
  nodeUpdate.select('circle.node')
    .attr('r', 8)
    .style("fill", function(d) {
      return d._children ? "lightsteelblue" : "#fff";
    })
    .attr('cursor', 'pointer');


  // Remove any exiting nodes
  var nodeExit = node.exit().transition()
    .duration(duration)
    .attr("transform", function(d) {
      return "translate(" + source.y + "," + source.x + ")";
    })
    .remove();

  // On exit reduce the node circles size to 0
  nodeExit.select('circle')
    .attr('r', 1e-6);

  // On exit reduce the opacity of text labels
  nodeExit.select('text')
    .style('fill-opacity', 1e-6);

  // ****************** links section ***************************

  // Update the links...
  var link = svg.selectAll('path.link')
    .data(links, function(d) {
      return d.id;
    });

  // Enter any new links at the parent's previous position.
  var linkEnter = link.enter().insert('path', "g")
    .attr("class", "link")
    .attr('d', function(d) {
      var o = {
        x: source.x0,
        y: source.y0
      }
      return diagonal(o, o)
    });

  // UPDATE
  var linkUpdate = linkEnter.merge(link);

  // Transition back to the parent element position
  linkUpdate.transition()
    .duration(duration)
    .attr('d', function(d) {
      return diagonal(d, d.parent)
    });

  // Remove any exiting links
  var linkExit = link.exit().transition()
    .duration(duration)
    .attr('d', function(d) {
      var o = {
        x: source.x,
        y: source.y
      }
      return diagonal(o, o)
    })
    .remove();

  // Store the old positions for transition.
  nodes.forEach(function(d) {
    d.x0 = d.x;
    d.y0 = d.y;
  });

  // Creates a curved (diagonal) path from parent to the child nodes
  function diagonal(s, d) {

    path = `M ${s.y} ${s.x}
            C ${(s.y + d.y) / 2} ${s.x},
              ${(s.y + d.y) / 2} ${d.x},
              ${d.y} ${d.x}`

    return path
  }

  // Toggle children on click.
  function click(d) {
    if (d.children) {
      //parent node, children expanded so collapse
      d._children = d.children;
      d.children = null;
      zzz();
    } else {
      //children not expanded (expand) or no children (nothing)
      if (d._children) { //if children exist but not shown (node is a parent node)
        d.children = d._children;
        d._children = null;
        zzz();
      } else { //if no c=children (i.e. node is a leaf node)
        //display node information in another div.
        //alert("score = " + d.data.data.score + " , category = " + d.data.data.category );
        xxx(d);
      }
    }
    update(d);
  }
}

function xxx(d) {
  $(".nist_cat").css({
    "display": "block"
  });
  //changevalue pscore_text to be node
  document.getElementById("pscore_text").textContent = d.data.name;
  //change value of pscore to be score
  document.getElementById("pscore").value = d.data.data.score;
  d3.select("#pscore").on("change", function() {
    d.data.data.score = this.value;
  })
}


function yyy(new_value) {
  //called from input slider 'pscore' 
  //change the node score value
}

function zzz() {
  $(".nist_cat").css({
    "display": "none"
  });
}

html {
  overflow-y: scroll;
}

body,
table {
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 12px;
  color: gray;
  background-color: #fff;
}

hr {
  border: 0;
  width: 100%;
  background-color: steelblue;
  color: #eeeeee;
  height: 1px;
}

/* A row that can contain all other divs to make sure they float centrally*/

.row {
  width: 1360px;
  margin: 0 auto;
  overflow: hidden;
}

/*---------------------------------------Tree Nodes and Links----------------------------------*/

.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 3px;
}

.node text {
  font: 12px sans-serif;
  color: #eeeeee;
}

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 2px;
}

/*---------------------------------------Main Layout Divs----------------------------------*/

.tree {
  width: 600px;
  height: 300px;
}

.nist_cat {
  width: 678px;
  height: 478px;
  display: none;
  float: left;
  border: 1px solid #eee;
}

/*---------------------------------------Input Sliders----------------------------------*/

input[type=range] {
  /*removes default webkit styles*/
  -webkit-appearance: none;
  /*fix for FF unable to apply focus style bug */
  border: 1px solid white;
  /*required for proper track sizing in FF*/
  width: 150px;
}

input[type=range]::-webkit-slider-runnable-track {
  width: 150px;
  height: 5px;
  background: #ddd;
  border: none;
  border-radius: 3px;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  border: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: steelblue;
  margin-top: -4px;
}

input[type=range]:focus {
  outline: none;
}

input[type=range]:focus::-webkit-slider-runnable-track {
  background: #ccc;
}

input[type=range]::-moz-range-track {
  width: 150px;
  height: 5px;
  background: #ddd;
  border: none;
  border-radius: 3px;
}

input[type=range]::-moz-range-thumb {
  border: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: steelblue;
}

/*hide the outline behind the border*/

input[type=range]:-moz-focusring {
  outline: 1px solid white;
  outline-offset: -1px;
}

input[type=range]::-ms-track {
  width: 150px;
  height: 5px;
  /*remove bg colour from the track, we'll use ms-fill-lower and ms-fill-upper instead */
  background: transparent;
  /*leave room for the larger thumb to overflow with a transparent border */
  border-color: transparent;
  border-width: 6px 0;
  /*remove default tick marks*/
  color: transparent;
}

input[type=range]::-ms-fill-lower {
  background: #777;
  border-radius: 10px;
}

input[type=range]::-ms-fill-upper {
  background: #ddd;
  border-radius: 10px;
}

input[type=range]::-ms-thumb {
  border: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: steelblue;
}

input[type=range]:focus::-ms-fill-lower {
  background: #888;
}

input[type=range]:focus::-ms-fill-upper {
  background: #ccc;
}

<!DOCTYPE html>
<meta charset="UTF-8">

<head>
  <link rel="stylesheet" href="tree2.css">
  <!-- load the d3.js library -->
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</head>

<body>
  <div class="row">
    <div id="tree" class="tree"></div>
  </div>
  <div class="row">
    <hr>


    <div id="protect" class="nist_cat">
      <span id="pscore_text" style="display: inline-block;width: 120px;text-align: right;"></span>
      <input type="range" id="pscore" min="1" max="4" step="1" onchange=yyy(value); />
    </div>
  </div>
</body>

PS：你在这里不需要jQuery ......实际上，你通常不需要D3代码中的任何jQuery。我建议你摆脱它。