如何附加一个带有标签的圆圈以向矩形节点指示信息并在下载前删除圆圈
how to append a circle with a label to indicate information to rectangle node and remove the circle before download
我有一个垂直的 D3JS 树，其中的节点是矩形。我想在矩形节点的右上角附加一个斜体字母“i”的圆圈，以表示该节点具有附加信息。我设法只附加了斜体字母“i”，但是，我无法将它放在一个圆圈中并仍然保持节点可点击。我还使用克隆将树下载为 SVG 文件，并希望在下载和打印之前从克隆的组元素中删除这个附加的圆圈和字母“i”。
var treeData = [{
"name": "Top Level",
"parent": "null",
"remark": "yes",
"children": [{
"name": "Level 2: A",
"parent": "Top Level",
"remark": "yes",
"children": [{
"name": "Son of A",
"parent": "Level 2: A",
"remark": "null"
},
{
"name": "Daughter of A",
"parent": "Level 2: A",
"remark": "null"
}
]
},
{
"name": "Level 2: B",
"parent": "Top Level",
"remark": "null"
}
]
}];
//*************************************************************************************
// 1. Create the button
var button = document.createElement("button");
button.innerHTML = "download file";
//*************************************************************************************
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 960 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
rectW = 100,
rectH = 30,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
//swap x and y for vertical
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.x + rectW / 2, d.y + rectH / 2];
// .projection(function(d) { return [d.x, d.y]; });
});
//var gElement = document.createElement('svg:g');
var gElement = document.createElementNS(d3.ns.prefix.svg, 'g');
gElement.setAttribute("id", "fg");
console.log(gElement);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append(function() {
return gElement;
}) //The argument to .append() has to be a function, you can't just pass element to it.
// .append("svg:g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = treeData[0];
root.x0 = height / 2;
root.y0 = 0;
update(root);
d3.select(self.frameElement).style("height", "500px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * 180;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
//swap x and y for vertical
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + source.x0 + "," + source.y0 + ")";
})
.on("click", click);
nodeEnter.append("rect")
//nodeEnter.append("circle")
// .attr("r", 1e-6)
.attr("width", rectW)
.attr("height", rectH)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 1e-6);
// IAH 20/01/2019 Filter to put tooltip only on nodes that have information associated with it
nodeEnter.filter(function(d) {
return (d.remark != 'null')
})
.append("text")
.attr("id", "infoText")
.attr("x", 96)
.attr("y", 7)
.attr("dy", ".30em")
.style("font-style", "italic")
.style("font-family", "serif")
.style("font-weight", "bold")
.text("i");
// Transition nodes to their new position.
//swap x and y for vertical layout
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
//nodeUpdate.select("circle")
nodeUpdate.select("rect")
.attr("width", rectW)
.attr("height", rectH)
.style("stroke", "black")
// .attr("r", 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.attr("x", rectW / 2)
.attr("y", rectH / 2)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
//vertical switch x and y positions
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.x + "," + source.y + ")";
})
.remove();
//nodeExit.select("circle")
nodeExit.select("rect")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("stroke", "#ccc")
.attr("fill", "none")
.attr("stroke-width", "2px")
.attr("d", function(d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// 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 diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
//*************************************************************************************
// 2. Append button somewhere
var body = document.getElementsByTagName("body")[0];
body.appendChild(button)
.setAttribute("transform", "translate(" + 0 + "," + 0 + ")");
//*************************************************************************************
function svgDataURL(svg) {
var svgAsXML = (new XMLSerializer).serializeToString(svg);
var dataURL = "data:image/svg+xml," + encodeURIComponent(svgAsXML);
return dataURL;
}
button.onclick = function() {
var svgElement = document.querySelector('svg');
var svgWH = svgElement.getBBox();
var canvasWidth = svgWH.width;
var canvasHeight = svgWH.height;
var groupElement = document.getElementById('fg');
groupElement.setAttribute("transform", "translate(0,0)");
const bb = groupElement.getBBox();
// clone the svg to avoid destroying it while appending to the svg namespace
let clonedGroupElement = groupElement.cloneNode(true);
var svgContent = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svgContent.setAttribute('viewBox', ' ' + bb.x + ' ' + bb.y + ' ' + bb.width + ' ' + bb.height);
svgContent.setAttribute("width", "100%");
svgContent.setAttribute("height", "100%");
svgContent.setAttribute("preserveAspectRatio", "xMidYMid meet");
// try to remove the information icon before downloading
var rmText = document.getElementById('infoText');
console.log(rmText);
svgContent.appendChild(clonedGroupElement); // use the cloned nodes
var dl = document.createElement('a');
document.body.appendChild(dl);
dl.setAttribute("href", svgDataURL(svgContent)); // function svgDataURL expects a node
dl.setAttribute("download", "test.svg");
dl.click();
dl.remove();
svgContent.removeChild(clonedGroupElement);
};
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
/*
fill: none;
stroke: #ccc;
stroke-width: 2px;*/
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>
我创建了一个虚拟属性 ignore-export 并且能够使用 querySelectorAll() 到 select 所有具有该属性的元素并删除它们。请注意，IE 不支持 node.remove() 功能，但 MDN 上提供了一个 polyfill。
我画圈的时候节点没反应没有任何问题，但是如果你遇到了，请告诉我。
var treeData = [{
"name": "Top Level",
"parent": "null",
"remark": "yes",
"children": [{
"name": "Level 2: A",
"parent": "Top Level",
"remark": "yes",
"children": [{
"name": "Son of A",
"parent": "Level 2: A",
"remark": "null"
},
{
"name": "Daughter of A",
"parent": "Level 2: A",
"remark": "null"
}
]
},
{
"name": "Level 2: B",
"parent": "Top Level",
"remark": "null"
}
]
}];
//*************************************************************************************
// 1. Create the button
var button = document.createElement("button");
button.innerHTML = "download file";
//*************************************************************************************
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 960 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
rectW = 100,
rectH = 30,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
//swap x and y for vertical
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.x + rectW / 2, d.y + rectH / 2];
// .projection(function(d) { return [d.x, d.y]; });
});
//var gElement = document.createElement('svg:g');
var gElement = document.createElementNS(d3.ns.prefix.svg, 'g');
gElement.setAttribute("id", "fg");
console.log(gElement);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append(function() {
return gElement;
}) //The argument to .append() has to be a function, you can't just pass element to it.
// .append("svg:g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = treeData[0];
root.x0 = height / 2;
root.y0 = 0;
update(root);
d3.select(self.frameElement).style("height", "500px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * 180;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
//swap x and y for vertical
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + source.x0 + "," + source.y0 + ")";
})
.on("click", click);
nodeEnter.append("rect")
//nodeEnter.append("circle")
// .attr("r", 1e-6)
.attr("width", rectW)
.attr("height", rectH)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 1e-6);
// IAH 20/01/2019 Filter to put tooltip only on nodes that have information associated with it
var nodesWithInfo = nodeEnter.filter(function(d) {
return (d.remark != 'null')
});
nodesWithInfo
.append("circle")
.attr("export-ignore", true)
.attr("cx", 96)
.attr("cy", 7)
.attr("r", 10);
nodesWithInfo
.append("text")
.attr("export-ignore", true)
.attr("id", "infoText")
.attr("x", 96)
.attr("y", 7)
.attr("dy", ".30em")
.style("font-style", "italic")
.style("font-family", "serif")
.style("font-weight", "bold")
.text("i");
// Transition nodes to their new position.
//swap x and y for vertical layout
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
//nodeUpdate.select("circle")
nodeUpdate.select("rect")
.attr("width", rectW)
.attr("height", rectH)
.style("stroke", "black")
// .attr("r", 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.attr("x", rectW / 2)
.attr("y", rectH / 2)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
//vertical switch x and y positions
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.x + "," + source.y + ")";
})
.remove();
//nodeExit.select("circle")
nodeExit.select("rect")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("stroke", "#ccc")
.attr("fill", "none")
.attr("stroke-width", "2px")
.attr("d", function(d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// 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 diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
//*************************************************************************************
// 2. Append button somewhere
var body = document.getElementsByTagName("body")[0];
body.appendChild(button)
.setAttribute("transform", "translate(" + 0 + "," + 0 + ")");
//*************************************************************************************
function svgDataURL(svg) {
var svgAsXML = (new XMLSerializer).serializeToString(svg);
var dataURL = "data:image/svg+xml," + encodeURIComponent(svgAsXML);
return dataURL;
}
button.onclick = function() {
var svgElement = document.querySelector('svg');
var svgWH = svgElement.getBBox();
var canvasWidth = svgWH.width;
var canvasHeight = svgWH.height;
var groupElement = document.getElementById('fg');
groupElement.setAttribute("transform", "translate(0,0)");
const bb = groupElement.getBBox();
// clone the svg to avoid destroying it while appending to the svg namespace
let clonedGroupElement = groupElement.cloneNode(true);
var svgContent = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svgContent.setAttribute('viewBox', ' ' + bb.x + ' ' + bb.y + ' ' + bb.width + ' ' + bb.height);
svgContent.setAttribute("width", "100%");
svgContent.setAttribute("height", "100%");
svgContent.setAttribute("preserveAspectRatio", "xMidYMid meet");
// try to remove the information icon before downloading
clonedGroupElement.querySelectorAll('[export-ignore]').forEach(function(node) {
node.remove();
});
svgContent.appendChild(clonedGroupElement); // use the cloned nodes
var dl = document.createElement('a');
document.body.appendChild(dl);
dl.setAttribute("href", svgDataURL(svgContent)); // function svgDataURL expects a node
dl.setAttribute("download", "test.svg");
dl.click();
dl.remove();
svgContent.removeChild(clonedGroupElement);
};
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
text-anchor: middle;
}
.link {
/*
fill: none;
stroke: #ccc;
stroke-width: 2px;*/
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>
我有一个垂直的 D3JS 树，其中的节点是矩形。我想在矩形节点的右上角附加一个斜体字母“i”的圆圈，以表示该节点具有附加信息。我设法只附加了斜体字母“i”，但是，我无法将它放在一个圆圈中并仍然保持节点可点击。我还使用克隆将树下载为 SVG 文件，并希望在下载和打印之前从克隆的组元素中删除这个附加的圆圈和字母“i”。
var treeData = [{
"name": "Top Level",
"parent": "null",
"remark": "yes",
"children": [{
"name": "Level 2: A",
"parent": "Top Level",
"remark": "yes",
"children": [{
"name": "Son of A",
"parent": "Level 2: A",
"remark": "null"
},
{
"name": "Daughter of A",
"parent": "Level 2: A",
"remark": "null"
}
]
},
{
"name": "Level 2: B",
"parent": "Top Level",
"remark": "null"
}
]
}];
//*************************************************************************************
// 1. Create the button
var button = document.createElement("button");
button.innerHTML = "download file";
//*************************************************************************************
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 960 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
rectW = 100,
rectH = 30,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
//swap x and y for vertical
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.x + rectW / 2, d.y + rectH / 2];
// .projection(function(d) { return [d.x, d.y]; });
});
//var gElement = document.createElement('svg:g');
var gElement = document.createElementNS(d3.ns.prefix.svg, 'g');
gElement.setAttribute("id", "fg");
console.log(gElement);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append(function() {
return gElement;
}) //The argument to .append() has to be a function, you can't just pass element to it.
// .append("svg:g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = treeData[0];
root.x0 = height / 2;
root.y0 = 0;
update(root);
d3.select(self.frameElement).style("height", "500px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * 180;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
//swap x and y for vertical
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + source.x0 + "," + source.y0 + ")";
})
.on("click", click);
nodeEnter.append("rect")
//nodeEnter.append("circle")
// .attr("r", 1e-6)
.attr("width", rectW)
.attr("height", rectH)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 1e-6);
// IAH 20/01/2019 Filter to put tooltip only on nodes that have information associated with it
nodeEnter.filter(function(d) {
return (d.remark != 'null')
})
.append("text")
.attr("id", "infoText")
.attr("x", 96)
.attr("y", 7)
.attr("dy", ".30em")
.style("font-style", "italic")
.style("font-family", "serif")
.style("font-weight", "bold")
.text("i");
// Transition nodes to their new position.
//swap x and y for vertical layout
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
//nodeUpdate.select("circle")
nodeUpdate.select("rect")
.attr("width", rectW)
.attr("height", rectH)
.style("stroke", "black")
// .attr("r", 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.attr("x", rectW / 2)
.attr("y", rectH / 2)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
//vertical switch x and y positions
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.x + "," + source.y + ")";
})
.remove();
//nodeExit.select("circle")
nodeExit.select("rect")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("stroke", "#ccc")
.attr("fill", "none")
.attr("stroke-width", "2px")
.attr("d", function(d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// 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 diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
//*************************************************************************************
// 2. Append button somewhere
var body = document.getElementsByTagName("body")[0];
body.appendChild(button)
.setAttribute("transform", "translate(" + 0 + "," + 0 + ")");
//*************************************************************************************
function svgDataURL(svg) {
var svgAsXML = (new XMLSerializer).serializeToString(svg);
var dataURL = "data:image/svg+xml," + encodeURIComponent(svgAsXML);
return dataURL;
}
button.onclick = function() {
var svgElement = document.querySelector('svg');
var svgWH = svgElement.getBBox();
var canvasWidth = svgWH.width;
var canvasHeight = svgWH.height;
var groupElement = document.getElementById('fg');
groupElement.setAttribute("transform", "translate(0,0)");
const bb = groupElement.getBBox();
// clone the svg to avoid destroying it while appending to the svg namespace
let clonedGroupElement = groupElement.cloneNode(true);
var svgContent = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svgContent.setAttribute('viewBox', ' ' + bb.x + ' ' + bb.y + ' ' + bb.width + ' ' + bb.height);
svgContent.setAttribute("width", "100%");
svgContent.setAttribute("height", "100%");
svgContent.setAttribute("preserveAspectRatio", "xMidYMid meet");
// try to remove the information icon before downloading
var rmText = document.getElementById('infoText');
console.log(rmText);
svgContent.appendChild(clonedGroupElement); // use the cloned nodes
var dl = document.createElement('a');
document.body.appendChild(dl);
dl.setAttribute("href", svgDataURL(svgContent)); // function svgDataURL expects a node
dl.setAttribute("download", "test.svg");
dl.click();
dl.remove();
svgContent.removeChild(clonedGroupElement);
};
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
/*
fill: none;
stroke: #ccc;
stroke-width: 2px;*/
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>
我创建了一个虚拟属性 ignore-export 并且能够使用 querySelectorAll() 到 select 所有具有该属性的元素并删除它们。请注意，IE 不支持 node.remove() 功能，但 MDN 上提供了一个 polyfill。
我画圈的时候节点没反应没有任何问题，但是如果你遇到了，请告诉我。
var treeData = [{
"name": "Top Level",
"parent": "null",
"remark": "yes",
"children": [{
"name": "Level 2: A",
"parent": "Top Level",
"remark": "yes",
"children": [{
"name": "Son of A",
"parent": "Level 2: A",
"remark": "null"
},
{
"name": "Daughter of A",
"parent": "Level 2: A",
"remark": "null"
}
]
},
{
"name": "Level 2: B",
"parent": "Top Level",
"remark": "null"
}
]
}];
//*************************************************************************************
// 1. Create the button
var button = document.createElement("button");
button.innerHTML = "download file";
//*************************************************************************************
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 960 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
rectW = 100,
rectH = 30,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
//swap x and y for vertical
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.x + rectW / 2, d.y + rectH / 2];
// .projection(function(d) { return [d.x, d.y]; });
});
//var gElement = document.createElement('svg:g');
var gElement = document.createElementNS(d3.ns.prefix.svg, 'g');
gElement.setAttribute("id", "fg");
console.log(gElement);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append(function() {
return gElement;
}) //The argument to .append() has to be a function, you can't just pass element to it.
// .append("svg:g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = treeData[0];
root.x0 = height / 2;
root.y0 = 0;
update(root);
d3.select(self.frameElement).style("height", "500px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * 180;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
//swap x and y for vertical
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + source.x0 + "," + source.y0 + ")";
})
.on("click", click);
nodeEnter.append("rect")
//nodeEnter.append("circle")
// .attr("r", 1e-6)
.attr("width", rectW)
.attr("height", rectH)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 1e-6);
// IAH 20/01/2019 Filter to put tooltip only on nodes that have information associated with it
var nodesWithInfo = nodeEnter.filter(function(d) {
return (d.remark != 'null')
});
nodesWithInfo
.append("circle")
.attr("export-ignore", true)
.attr("cx", 96)
.attr("cy", 7)
.attr("r", 10);
nodesWithInfo
.append("text")
.attr("export-ignore", true)
.attr("id", "infoText")
.attr("x", 96)
.attr("y", 7)
.attr("dy", ".30em")
.style("font-style", "italic")
.style("font-family", "serif")
.style("font-weight", "bold")
.text("i");
// Transition nodes to their new position.
//swap x and y for vertical layout
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
//nodeUpdate.select("circle")
nodeUpdate.select("rect")
.attr("width", rectW)
.attr("height", rectH)
.style("stroke", "black")
// .attr("r", 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.attr("x", rectW / 2)
.attr("y", rectH / 2)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
//vertical switch x and y positions
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.x + "," + source.y + ")";
})
.remove();
//nodeExit.select("circle")
nodeExit.select("rect")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("stroke", "#ccc")
.attr("fill", "none")
.attr("stroke-width", "2px")
.attr("d", function(d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// 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 diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
//*************************************************************************************
// 2. Append button somewhere
var body = document.getElementsByTagName("body")[0];
body.appendChild(button)
.setAttribute("transform", "translate(" + 0 + "," + 0 + ")");
//*************************************************************************************
function svgDataURL(svg) {
var svgAsXML = (new XMLSerializer).serializeToString(svg);
var dataURL = "data:image/svg+xml," + encodeURIComponent(svgAsXML);
return dataURL;
}
button.onclick = function() {
var svgElement = document.querySelector('svg');
var svgWH = svgElement.getBBox();
var canvasWidth = svgWH.width;
var canvasHeight = svgWH.height;
var groupElement = document.getElementById('fg');
groupElement.setAttribute("transform", "translate(0,0)");
const bb = groupElement.getBBox();
// clone the svg to avoid destroying it while appending to the svg namespace
let clonedGroupElement = groupElement.cloneNode(true);
var svgContent = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svgContent.setAttribute('viewBox', ' ' + bb.x + ' ' + bb.y + ' ' + bb.width + ' ' + bb.height);
svgContent.setAttribute("width", "100%");
svgContent.setAttribute("height", "100%");
svgContent.setAttribute("preserveAspectRatio", "xMidYMid meet");
// try to remove the information icon before downloading
clonedGroupElement.querySelectorAll('[export-ignore]').forEach(function(node) {
node.remove();
});
svgContent.appendChild(clonedGroupElement); // use the cloned nodes
var dl = document.createElement('a');
document.body.appendChild(dl);
dl.setAttribute("href", svgDataURL(svgContent)); // function svgDataURL expects a node
dl.setAttribute("download", "test.svg");
dl.click();
dl.remove();
svgContent.removeChild(clonedGroupElement);
};
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
text-anchor: middle;
}
.link {
/*
fill: none;
stroke: #ccc;
stroke-width: 2px;*/
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>