[英]Zoom for graph in D3
我有使用存儲在json文件中的數據繪制圖形的javascript代碼。
<!DOCTYPE html xmlns:xlink="http://www.w3.org/1999/xlink">
<meta charset="utf-8">
<style>
// style here
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<div id="animviz"></div>
<script>
var vv = window,
w = vv.innerWidth,
h = vv.innerHeight;
var x = d3.scale.linear()
.domain([0, w])
.range([0, w]);
var y = d3.scale.linear()
.domain([0, h])
.range([h, 0]);
var svg = d3.select("#animviz")
.append("svg")
.attr("width", w)
.attr("height", h)
.append("g")
var color = d3.scale.category10();
var force = d3.layout.force()
.charge(-200)
.linkDistance(50)
.size([w, h]);
d3.json("post000.json", function(error, graph) {
force
.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
var myMouseoverFunction = function() {
var circle = d3.select(this);
circle.transition().duration(100)
.attr("r", 20 )
node.append("title")
.text(function(d) { return d.name});
}
var myMouseoutFunction = function() {
var circle = d3.select(this);
circle.transition().duration(500)
.attr("r", 10 );
}
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 10)
.attr("transform", transform)
.style("fill", function(d) { return color(d.group); })
.call(force.drag)
.on("mouseover", myMouseoverFunction)
.on("mouseout", myMouseoutFunction);
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("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
});
</script>
</body>
但是,我無法在瀏覽器中放大或縮小此圖。 我計划使用文檔中的類似示例 ; 但是,就我而言,我使用異步的d3.json從post000.json加載數據,我不確定在加載該數據以將其作為縮放功能的輸入時如何訪問該數據。
如何繪制可以放大存儲在json中的數據的圖形?
這是對我有用的代碼:
<!DOCTYPE html xmlns:xlink="http://www.w3.org/1999/xlink">
<meta charset="utf-8">
<style>
// style here
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<div id="animviz"></div>
<script>
d3.json("post000.json", function(error, graph) {
var vv = window,
w = vv.innerWidth,
h = vv.innerHeight;
var svg = d3.select("#animviz")
.append("svg")
.attr("width", w)
.attr("height", h)
.append("g")
.call(d3.behavior.zoom().scaleExtent([0, 8]).on("zoom", zoom))
.append("g");
var color = d3.scale.category10();
var force = d3.layout.force()
.charge(-200)
.linkDistance(50)
.size([w, h]);
force
.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.attr("transform", function(d) { return "translate(" + d + ")"; });
function zoom() {
svg.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
var myMouseoverFunction = function() {
var circle = d3.select(this);
circle.transition().duration(100)
.attr("r", 20 )
node.append("title")
.text(function(d) { return d.name});
}
var myMouseoutFunction = function() {
var circle = d3.select(this);
circle.transition().duration(500)
.attr("r", 10 );
}
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 10)
.style("fill", function(d) { return color(d.group); })
.call(force.drag)
.on("mouseover", myMouseoverFunction)
.on("mouseout", myMouseoutFunction);
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("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
});
</script>
</body>
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