我正在使用d3 v4绘制径向树。 我有3个按钮用于加载3年不同的数据。 当我第一次单击该按钮时，根将从美国更改为其他值（这是美国的孩子）。 进一步点击（比如说，大约20次点击）后，该值再次从美国变为其他孩子。
任何人都可以帮我解决这个问题。请在下面找到代码：
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.node {
cursor: pointer;
}
.node circle {
fill: #999;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
}
.link {
fill: #e6f5c9;//#f03b20; //#c6dbef;
//stroke: #ccc;
stroke: #e6f5c9;//#f03b20;
//stroke-width: 5.5px;
.ticks {
font: 10px sans-serif;
}
.track,
.track-inset,
.track-overlay {
stroke-linecap: round;
}
.track {
stroke: #000;
stroke-opacity: 0.3;
stroke-width: 10px;
}
.track-inset {
stroke: #ddd;
stroke-width: 8px;
}
.track-overlay {
pointer-events: stroke;
stroke-width: 50px;
cursor: crosshair;
}
.handle {
fill: #fff;
stroke: #000;
stroke-opacity: 0.5;
stroke-width: 1.25px;
}
</style>
<body>
<div id="collapseButton">
<input name="collapseButton"
type="button"
value="Collapse All Nodes"
onclick="updateData()" />
</div>
<div id="year_2013">
<input name="2013Data"
type="button"
value="Wait times for 2013"
onclick="updateData2013()" />
</div>
<div id="year_2014">
<input name="2014Data"
type="button"
value="Wait times for 2014"
onclick="updateData2014()" />
</div>
<div id="year_2015">
<input name="2015Data"
type="button"
value="Wait times for 2015"
onclick="updateData2015()" />
</div>
<script src="//d3js.org/d3.v4.min.js"></script>
<script>
var duration=1500, delay = 3000;
var width = 960,
height = 1000,
margin = {top:20,bottom:20,right:20,left:20};
duration = 750;
var buttonPressed = "2013";
var nodes,links;
var i = 0;
var svg = d3.select("body").append("svg")
.attr("width",width)
.attr("height",height);
var g = svg.append("g")
//.attr("transform","translate(100,400)");
.attr("transform", "translate(" + width/2 + "," + height/2 + ")");
createSvg2();
//var g = svg.append("g").attr("transform", "translate(" + (width / 2 + 40) + "," + (height / 2 + 90) + ")");
//var button = g.selectAll("button");
//console.log(button);
//g.append("button");
function connector(d) {
return "M" + project(d.x, d.y)
+ "C" + project(d.x, (d.y + d.parent.y) / 2)
+ " " + project(d.parent.x, (d.y + d.parent.y) / 2)
+ " " + project(d.parent.x, d.parent.y);
}
var tree,
root;
var nodeSvg, linkSvg, nodeEnter, linkEnter;
//updateData2013();
initialFunction();
function initialFunction()
{
tree = d3.tree()
//.size([360,250]);
//.size([150,50]),
.size([150,100]);
function collapse(d)
{
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
d3.json("treeData.json",function(error,treeData){
if(error) throw error;
root = d3.hierarchy(treeData,function(d){
return d.children;
});
console.log("Data is: \n");
root.each(function (d) {
d.name = d.data.name; //transferring name to a name variable
d.id = i; //Assigning numerical Ids
i += i;
});
root.x0 = height / 2;
root.y0 = 0;
//root.children.forEach(collapse);
update(root);
});
}
function update(source) {
nodes = tree(root).descendants();
links = nodes.slice(1);
var nodeUpdate;
var nodeExit;
// To maintain the depth of the tree always, comment for self arranging tree
nodes.forEach(function(d) { d.y = d.depth * 180; }); // 180
nodeSvg = g.selectAll(".node")
.data(nodes,function(d) { return d.id || (d.id = ++i); });
var nodeEnter = nodeSvg.enter()
.append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + project(d.x, d.y) + ")"; })
.on("click",click);
//.on("mouseover", function(d) { return "minu"; });
nodeEnter.append("circle")
.attr("r", function(d){ return 5;})
.style("fill", color);
nodeEnter.append("text")
.attr("dy", ".31em")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
//.style("text-anchor", function(d) { return d.x < 180 === !d.children ? "start" : "end"; })
.attr("text-anchor", function(d) { return d.children || d._children ? "start" : "start"; })
//.attr("transform", function(d) { return "rotate(" + (d.x < 180 ? d.x - 40 : d.x + 40) + ")"; })
.attr("transform",function(d) { return d.children || d._children ? ("translate(20,0)") : ("translate(0,0)"); }) // straight to right
//.attr("transform", function(d) { return "rotate(" + (d.x < 180 ? d.x - 90 : d.x + 90) + ")"; })
//.attr("transform",function(d) { return d.children || d._children ? ("translate(20,0)") : ("translate(0,0)"); })
.text(function(d) { return d.data.name; });
// Transition nodes to their new position.
var nodeUpdate = nodeSvg.merge(nodeEnter).transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + project(d.x, d.y) + ")"; });
nodeSvg.select("circle")
.style("fill", color);
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = nodeSvg.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; }) //for the animation to either go off there itself or come to centre
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
linkSvg = g.selectAll(".link")
.data(links, function(link) { var id = link.id + '->' + link.parent.id; return id; });
// Transition links to their new position.
linkSvg.transition()
.duration(duration);
// .attr('d', connector);
// Enter any new links at the parent's previous position.
linkEnter = linkSvg.enter().insert('path', 'g')
.attr("class", "link")
.attr("d", function (d) {
var o = {x: source.x0, y: source.y0, parent: {x: source.x0, y: source.y0}};
return connector(o);
})
.style("fill",pathColor)
.style("stroke",pathColor)
.style("stroke-width","1.5px");
// Transition links to their new position.
linkSvg.merge(linkEnter).transition()
.duration(duration)
.attr("d", connector);
// Transition exiting nodes to the parent's new position.
linkSvg.exit().transition()
.duration(duration)
.attr("d", function (d) {
var o = {x: source.x, y: source.y, parent: {x: source.x, y: source.y}};
return connector(o);
})
.remove();
}
//timeSlider();
function showClock(d)
{
console.log("Show Clock");
console.log(project(d.x,d.y));
}
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
if(d.children == null)
{
showClock(d);
}
d._children = null;
}
update(d);
}
function updateData2013()
{
buttonPressed = "2013";
initialFunction();
console.log("2013 Data");
//setTimeout(updateData2014, duration + delay);
}
function updateData2014()
{
buttonPressed = "2014";
initialFunction();
console.log("2014 Data");
//setTimeout(updateData2015, duration + delay);
}
function updateData2015()
{
buttonPressed = "2015";
initialFunction();
console.log("2015 Data");
//setTimeout(updateData2013, duration + delay);
}
function pathColor(d)
{
//['#1b9e77','#d95f02','#7570b3','#e7298a','#66a61e','#e6ab02']
if(buttonPressed == "2013")
{
if(d.data.time_2013 >= 5 && d.data.time_2013 <= 8)
{
return "#1b9e77";
}
else if(d.data.time_2013 > 8 && d.data.time_2013 <= 11)
{
return "#d95f02";
}
else if(d.data.time_2013 > 11 && d.data.time_2013 <= 14)
{
return "#7570b3";
}
else if(d.data.time_2013 > 14 && d.data.time_2013 <= 17)
{
return "#e7298a";
}
else if(d.data.time_2013 > 17 && d.data.time_2013 <= 21)
{
return "#66a61e";
}
else if(d.data.time_2013 > 21 && d.data.time_2013 <= 24)
{
return "#e6ab02";
}
}
else if(buttonPressed == "2014")
{
if(d.data.time_2014 >= 5 && d.data.time_2014 <= 8)
{
return "#1b9e77";
}
else if(d.data.time_2014 > 8 && d.data.time_2014 <= 11)
{
return "#d95f02";
}
else if(d.data.time_2014 > 11 && d.data.time_2014 <= 14)
{
return "#7570b3";
}
else if(d.data.time_2014 > 14 && d.data.time_2014 <= 17)
{
return "#e7298a";
}
else if(d.data.time_2014 > 17 && d.data.time_2014 <= 21)
{
return "#66a61e";
}
else if(d.data.time_2014 > 21 && d.data.time_2014 <= 24)
{
return "#e6ab02";
}
}
else
{
if(d.data.time_2015 >= 5 && d.data.time_2015 <= 8)
{
return "#1b9e77";
}
else if(d.data.time_2015 > 8 && d.data.time_2015 <= 11)
{
return "#d95f02";
}
else if(d.data.time_2015 > 11 && d.data.time_2015 <= 14)
{
return "#7570b3";
}
else if(d.data.time_2015 > 14 && d.data.time_2015 <= 17)
{
return "#e7298a";
}
else if(d.data.time_2015 > 17 && d.data.time_2015 <= 21)
{
return "#66a61e";
}
else if(d.data.time_2015 > 21 && d.data.time_2015 <= 24)
{
return "#e6ab02";
}
}
}
function color(d) {
return d._children ? "#3182bd" // collapsed package
: d.children ? "#c6dbef" // expanded package
: "#fd8d3c"; // leaf node
}
function project(x, y) {
var angle = (x - 90) / 180 * Math.PI, radius = y;
return [radius * Math.cos(angle), radius * Math.sin(angle)];
}
function updateData()
{
console.log("Button is clicked");
//toggleAll(root.children);
root.children.forEach(toggleAll);
}
function toggleAll(d) {
if (d.children) {
d.children.forEach(toggleAll);
compressNodes(d);
}
}
function compressNodes(d) {
if(d==root)
{
}
else{
console.log("inside d.children");
d._children = d.children;
d.children = null;
update(d);
//simulation.restart();
}
}
function createSvg2()
{
var width1 = 10,
height1 = 1000;
var svg2 = d3.select("body").append("svg")
.attr("width",width)
.attr("height",height);
svg2.append("circle")
.attr("r",2.5)
.attr("transform","translate(" + width1/2 + "," + height1/4 + ")")
.attr("fill","red");
}
</script>
</body>
</html>
JSON：
{
"name": "United States",
"children": [
{
"name": "Ohio",
"children":[
{ "name" : "Cincinnati Northern Kentucky Intl", "code" : "CVG" , "time_2013": 15.01, "time_2014": 13.22, "time_2015": 13.81}
]
},
{
"name": "California",
"children":[
{"name": "San Francisco", "code" : "" , "time_2013":15, "time_2014": 15.01, "time_2015": 15.01},
{"name": "San Jose", "code" : "" , "time_2013":25, "time_2014": 15.01, "time_2015": 15.01},
{"name": "Los Angeles", "code" : "" , "time_2013":17, "time_2014": 15.01, "time_2015": 15.01}
]
},
{
"name": "Illinois",
"children":[
{ "name" : "Chicago Ohare Intl", "code" : "ORD" , "time_2013": 18.58, "time_2014": 14.37, "time_2015": 14.32},
{ "name" : "Chicago Midway Intl", "code" : "MDW" , "time_2013": 11.19 , "time_2014": 14.37, "time_2015": 7.31}
]
},
{
"name": "Colorado",
"children" : [
{ "name": "Denver Intl", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Florida",
"children" : [
{ "name": "Florida airport", "code" : "" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Georgia",
"children" : [
{ "name": "Hartsfield Jackson Atlanta Intl", "code" : "ATL" , "time_2013": 10.08, "time_2014": 10.00, "time_2015": 10.81}
]
},
{
"name": "Kentucky",
"children" : [
{ "name": "Kentucy airport", "code" : "KEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Massachussets",
"children" : [
{"name": "General Edward Lawrence Logan Intl", "code" : "BOS" , "time_2013": 19.86, "time_2014": 19.24, "time_2015": 17.22}
]
},
{
"name": "Michigan",
"children" : [
{"name" : "Detroit Metro Wayne Co", "code" : "DTW" , "time_2013":15.71, "time_2014": 15.55, "time_2015": 15.01}
]
},
{
"name": "Minnesota",
"children" : [
{ "name": "Minnesota airport", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Missouri",
"children" : [
{ "name": "Missouri airport", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "North Carolina",
"children" : [
{"name" : "Charlotte Douglas Intl","code" : "CLT" , "time_2013": 13.75 , "time_2014": 12.73, "time_2015": 9.21}
]
},
{
"name": "Nevada",
"children" : [
{ "name": "Nevada airport", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Newyork",
"children" : [
{ "name": "Newyork airport", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Oregon",
"children" : [
{ "name": "Oregon airprot", "code" : "OR" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Pennsylvania",
"children": [
{ "name" : "Pensylvania Airport", "code" : "PEN" , "time_2013" : 9.18, "time_2014": 7.7, "time_2015": 9.31}
]
},
{
"name": "Mary Land",
"children": [
{ "name" : "Baltimore Washington Intl", "code" : "BWI" , "time_2013" : 9.18, "time_2014": 7.7, "time_2015": 9.31}
]
},
{
"name": "Hawaii",
"children" : [
{ "name": "Hawaiiiiiii" , "code" : "HAW" , "time_2013": 21.33, "time_2014": 11.98, "time_2015": 13.47}
]
},
{
"name": "Texas",
"children" : [
{ "name": "Dallas Fort Worth Intl" , "code" : "DFW" , "time_2013": 21.33, "time_2014": 11.98, "time_2015": 13.47},
{ "name": "Houston" , "code" : "" , "time_2013": 13, "time_2014": 15.01, "time_2015": 15.01},
{ "name": "Austin Bergstrom Intl" , "code" : "AUS" , "time_2013": 13.52, "time_2014": 16.38, "time_2015": 13.29}
]
},
{
"name": "Utah",
"children" : [
{ "name": "Utah Airport", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
},
{
"name": "Virginia",
"children" : [
{ "name": "Virginia Airport", "code" : "DEN" , "time_2013": 13.31, "time_2014": 13.33, "time_2015": 12.51}
]
}
]
}
答案 0 :(得分：0)
最简单的解决方案是更改#include <stdio.h>
#include <string.h>
#include <stdlib.h>
char * my_strcat(const char *str1, const char *str2)
{
size_t s1, s2, s3, i = 0;
char *a;
s1 = strlen(str1);
s2 = strlen(str2);
s3 = s1+s2+1;
a = malloc(s3);
while(*str1 != '\0') {
a[i] = *str1;
str1++;
i++;
}
while(*str2 != '\0') {
a[i] = *str2;
str2++;
i++;
}
a[i] = '\0'; // Here i = s1 + s2
return a;
}
int main(void)
{
char *str = my_strcat("Hello", "world!");
printf("%s\n", str);
/* Always free allocated memory! */
free(str);
return 0;
}
函数中的密钥：
data对此：
nodeSvg = g.selectAll(".node")
.data(nodes,function(d) { return d.id || (d.id = ++i); });
这是一个工作的掠夺者：https://plnkr.co/edit/tMQBMyaWJEtEl9aPoDkQ?p=preview