我正在尝试在d3中创建可折叠的树图。虽然网络上有很多例子，但我不是JS的专家或d3来自java背景，并且找不到任何完全符合我需求的东西，因此我在许多博客和要点中找到了不同的模板。
问题是我的图表的下半部分被剪裁了。如果我增加svg大小，那只会拉长图形并且它仍会被剪裁。我发布了我已放置代码的plunkr链接。请滚动到plunkr中的右侧以查看图表。
以下是要呈现树的javascript
var CollapsibleTree = function(elt) {
var m = [20, 120, 20, 120],
w = 1280 - m[1] - m[3],
h = 780 - m[0] - m[2],
i = 0,
root;
var tree = d3.layout.tree()
.size([w, h]);
var parentdiagonal = d3.svg.diagonal()
.projection(function(d) { return [d.x, -d.y]; });
var childdiagonal = d3.svg.diagonal()
.projection(function(d) { return [d.x, d.y]; });
var vis = d3.select(elt).append("svg:svg")
.attr("width", w + m[1] + m[3])
.attr("height", h + m[0] + m[2])
.append("svg:g")
.attr("transform", "translate("+w/6+","+h/2+")"); // bidirectional-tree
var that = {
init: function(url) {
var that = this;
var json = {
"name":"A",
"elementType":"ACTION",
"elementSubType":"ACTION-A",
"isparent":false,
"parents":[
{
"name":"B",
"elementType":"RESOURCE",
"elementSubType":"RESOURCE-A",
"isparent":true
}
],
"children":[
{
"name":"C",
"elementType":"RESOURCE",
"elementSubType":"RESOURCE-C",
"isparent":false,
"children":[
{
"name":"D",
"elementType":"ACTION",
"elementSubType":"ACTION-A",
"isparent":false,
"children":[
{
"name":"E",
"elementType":"RESOURCE",
"elementSubType":"RESOURCE-A",
"isparent":false,
"children":[
{
"name":"F",
"elementType":"ACTION",
"elementSubType":"ACTION-C",
"isparent":false,
"children":[
{
"name":"G",
"elementType":"RESOURCE",
"elementSubType":"RESOURCE-C",
"isparent":false
}
]
}
]
}
]
}
]
}
]
};
root = json;
root.x = w / 2;
root.y = h / 2;
that.updateBoth(root);
},
updateBoth: function(source) {
var duration = d3.event && d3.event.altKey ? 5000 : 300;
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse();
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 0.5*h/4; });
// Update the nodes…
var node = vis.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("svg:g")
.attr("class", "node")
.attr("transform", function(d) {
if( that.isParent(d) ) {
return "translate(" + source.x + "," + -source.y + ")";
} else {
return "translate(" + source.x + "," + source.y + ")";
}
})
.on("click", function(d) { that.toggle(d); that.updateBoth(d); });
// Add images to node
nodeEnter.append("svg:image")
.attr("xlink:href", "img/file.png")
.attr("width", 35)
.attr("height", 35)
.attr("x",function(d) { return -20; }) // position the images
.attr("y",function(d) { return -20; });
nodeEnter.append("text")
// .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("x", function(d) {
return -10;
})
.attr("y", 20)
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.attr("text-anchor", function(d) {
return "middle";
})
.text(function(d) {
if (d.name.length > 10){
return d.name.substring(0,10)+d.name.substring(10,d.name.length);
}
else {
return d.name;
}
})
.style("fill", "black")
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.ease("linear")
.attr("transform", function(d) {
if( that.isParent(d) ) {
return "translate(" + d.x + "," + -d.y + ")";
} else {
return "translate(" + d.x + "," + d.y + ")";
}
});
nodeUpdate.select("text")
.style("fill-opacity", 1)
.attr("class", function(d){
if (d.status==="incomplete" || d.status === "failed"){
return "blink";
} else {
return "non-blink"
}
});
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
// .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.attr("transform", function(d) { // custom code to fix error in node exit
if (that.isParent(d)){
return "translate(" + source.x + "," + -source.y + ")"; // controls exit of parents
}
else{
return "translate(" + source.x + "," + source.y + ")"; // controls exit of children
}
})
.remove();
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = vis.selectAll("path.link")
.data(tree.links_parents(nodes).concat(tree.links(nodes)), function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("svg:path", "g")
.attr("class", "link")
.style("stroke", function(d) {
return "black";
})
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
if( that.isParent(d.target) ) {
return parentdiagonal({source: o, target: o});
} else {
return childdiagonal({source: o, target: o});
}
})
.transition()
.duration(duration)
.attr("d", function(d) {
if( that.isParent(d.target) ) {
return parentdiagonal(d);
} else {
// return parentdiagonal(d);
return childdiagonal(d);
}
})
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", function(d) {
if( that.isParent(d.target) ) {
return parentdiagonal(d);
} else {
return childdiagonal(d);
}
})
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
// return parentdiagonal({source: o, target: o});
if( that.isParent(d.target) ) {
return parentdiagonal({source: o, target: o});
} else {
return childdiagonal({source: o, target: o});
}
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x = d.x;
d.y = d.y;
});
},
isParent: function(node) {
if( node.parent && node.parent != root ) {
return this.isParent(node.parent);
} else
if( node.isparent ) {
return true;
} else {
return false;
}
},
// Toggle children or parents (one level).
toggle: function(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
if (d.parents) {
d._parents = d.parents;
d.parents = null;
} else {
d.parents = d._parents;
d._parents = null;
}
},
// Toggle successors or aancestors (multiple level)
toggleAll: function(d) {
if (d.children) {
d.children.forEach(that.toggleAll);
that.toggle(d);
}
if (d.parents) {
d.parents.forEach(that.toggleAll);
that.toggle(d);
}
}
}
return that;
}
以下是css
body {
overflow: hidden;
margin: 0;
font-size: 14px;
font-family: "Helvetica Neue", Helvetica;
}
#chart, #header, #footer {
position: absolute;
top: 0;
}
#header, #footer {
z-index: 1;
display: block;
font-size: 36px;
font-weight: 300;
text-shadow: 0 1px 0 #fff;
}
#header.inverted, #footer.inverted {
color: #fff;
text-shadow: 0 1px 4px #000;
}
#header {
top: 80px;
left: 140px;
width: 1000px;
}
#footer {
top: 680px;
right: 140px;
text-align: right;
}
rect {
fill: none;
pointer-events: all;
}
pre {
font-size: 18px;
}
line {
stroke: #000;
stroke-width: 1.5px;
}
.string, .regexp {
color: #f39;
}
.keyword {
color: #00c;
}
.comment {
color: #777;
font-style: oblique;
}
.number {
color: #369;
}
.class, .special {
color: #1181B8;
}
a:link, a:visited {
color: #000;
text-decoration: none;
}
a:hover {
color: #666;
}
.hint {
position: absolute;
right: 0;
width: 1280px;
font-size: 12px;
color: #999;
}
.node circle {
cursor: pointer;
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font-size: 11px;
}
path.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
/*svg {
border: 1px;
border-style: solid;
border-color: black;
}*/
#foo {
border: 5px;
border-style: dashed;
border-color: black;
background-color: pink;
}
#categoryHierarchy{
margin: 5px;
height: 700px;
width: auto;
border: 2px;
border-style: solid;
border-color: #000;
overflow: scroll;
/*padding: 10px;*/
}
和html个文件
<body>
<div id="categoryHierarchy"></div>
<script type="text/javascript">
$(document).ready(function(event) {
var tree = CollapsibleTree("#categoryHierarchy");
tree.init('sample.json');
});
</script>
</body>
答案 0 :(得分：0)
您可以尝试缩短每个“节点”之间的距离。
E.g。第98行尝试使用h - 'x'，我尝试使用300。
nodes.forEach(function(d) { d.y = d.depth * 0.5*(h-300)/4; });