2017-01-05 153 views
1

我是D3的新手,我只是在試驗它的功能。原諒我,如果這已經被覆蓋,但我似乎無法找到一種方法來實現放大到我的D3.js v4強制指導圖。我的代碼如下。D3.js V4強制定向圖放大

任何幫助,這將不勝感激

<!DOCTYPE html> 
<meta charset="utf-8"> 
<style> 

.links line { 
stroke: #999; 
stroke-opacity: 0.6; 
} 

.nodes circle { 
stroke: #fff; 
stroke-width: 1.5px; 
} 

</style> 
<div class="centre jumbotron"> 
<h1> Title </h1> 
    <h2> 
    This is the home page 
    </h2> 
</div> 
<svg width="960" height="600"></svg> 
<script src="https://d3js.org/d3.v4.min.js"></script> 
<script> 

var svg = d3.select("svg"), 
width = +svg.attr("width"), 
height = +svg.attr("height"); 

var color = d3.scaleOrdinal(d3.schemeCategory20); 

var simulation = d3.forceSimulation() 
.force("link", d3.forceLink().id(function(d) { return d.id; })) 
.force("charge", d3.forceManyBody()) 
.force("center", d3.forceCenter(width/2, height/2)); 

d3.json("network_data#all", function(error, graph) { 
if (error) throw error; 

var link = svg.append("g") 
    .attr("class", "links") 
    .selectAll("line") 
    .data(graph.links) 
    .enter().append("line") 
    .attr("stroke-width", function(d) { return Math.sqrt(d.value); }); 

var node = svg.append("g") 
    .attr("class", "nodes") 
    .selectAll("circle") 
    .data(graph.nodes) 
    .enter().append("circle") 
    .attr("r", 5) 
    .attr("fill", function(d) { return color(d.group); }) 
    .call(d3.drag() 
    .on("start", dragstarted) 
    .on("drag", dragged) 
    .on("end", dragended)); 

node.append("title") 
    .text(function(d) { return d.id; }); 

simulation 
    .nodes(graph.nodes) 
    .on("tick", ticked); 

simulation.force("link") 
    .links(graph.links); 

function ticked() { 
    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; }); 
    } 
    }); 

function dragstarted(d) { 
    if (!d3.event.active) simulation.alphaTarget(0.3).restart(); 
    d.fx = d.x; 
    d.fy = d.y; 
} 

function dragged(d) { 
    d.fx = d3.event.x; 
    d.fy = d3.event.y; 
} 

function dragended(d) { 
    if (!d3.event.active) simulation.alphaTarget(0); 
    d.fx = null; 
    d.fy = null; 
} 

</script> 

回答

5

這是非常直接的和證明here。你有一個強制模擬並不重要,步驟是一樣的。

這是它集成到你的代碼示例:

<!DOCTYPE html> 
 
<meta charset="utf-8"> 
 
<style> 
 
    .links line { 
 
    stroke: #999; 
 
    stroke-opacity: 0.6; 
 
    } 
 
    
 
    .nodes circle { 
 
    stroke: #fff; 
 
    stroke-width: 1.5px; 
 
    } 
 
</style> 
 
<div class="centre jumbotron"> 
 
<h1> Title </h1> 
 
    <h2> 
 
    This is the home page 
 
    </h2> 
 
</div> 
 
<svg width="960" height="600"></svg> 
 
<script src="https://d3js.org/d3.v4.min.js"></script> 
 
<script> 
 
    var svg = d3.select("svg"), 
 
    width = +svg.attr("width"), 
 
    height = +svg.attr("height"); 
 
    
 
    svg.append("rect") 
 
    .attr("width", width) 
 
    .attr("height", height) 
 
    .style("fill", "none") 
 
    .style("pointer-events", "all") 
 
    .call(d3.zoom() 
 
     .scaleExtent([1/2, 4]) 
 
     .on("zoom", zoomed)); 
 

 
    var g = svg.append("g"); 
 

 
    function zoomed() { 
 
    g.attr("transform", d3.event.transform); 
 
    } 
 

 
    var color = d3.scaleOrdinal(d3.schemeCategory20); 
 

 
    var simulation = d3.forceSimulation() 
 
    .force("link", d3.forceLink().id(function(d) { 
 
     return d.id; 
 
    })) 
 
    .force("charge", d3.forceManyBody()) 
 
    .force("center", d3.forceCenter(width/2, height/2)); 
 

 
    d3.json("https://jsonblob.com/api/6e520635-d35c-11e6-b16a-6b255c15b1a3", function(error, graph) { 
 
    if (error) throw error; 
 

 
    var link = g.append("g") 
 
     .attr("class", "links") 
 
     .selectAll("line") 
 
     .data(graph.links) 
 
     .enter().append("line") 
 
     .attr("stroke-width", function(d) { 
 
     return Math.sqrt(d.value); 
 
     }); 
 

 
    var node = g.append("g") 
 
     .attr("class", "nodes") 
 
     .selectAll("circle") 
 
     .data(graph.nodes) 
 
     .enter().append("circle") 
 
     .attr("r", 5) 
 
     .attr("fill", function(d) { 
 
     return color(d.group); 
 
     }) 
 
     .call(d3.drag() 
 
     .on("start", dragstarted) 
 
     .on("drag", dragged) 
 
     .on("end", dragended)); 
 

 
    node.append("title") 
 
     .text(function(d) { 
 
     return d.id; 
 
     }); 
 

 
    simulation 
 
     .nodes(graph.nodes) 
 
     .on("tick", ticked); 
 

 
    simulation.force("link") 
 
     .links(graph.links); 
 

 
    function ticked() { 
 
     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; 
 
     }); 
 
    } 
 
    }); 
 

 
    function dragstarted(d) { 
 
    if (!d3.event.active) simulation.alphaTarget(0.3).restart(); 
 
    d.fx = d.x; 
 
    d.fy = d.y; 
 
    } 
 

 
    function dragged(d) { 
 
    d.fx = d3.event.x; 
 
    d.fy = d3.event.y; 
 
    } 
 

 
    function dragended(d) { 
 
    if (!d3.event.active) simulation.alphaTarget(0); 
 
    d.fx = null; 
 
    d.fy = null; 
 
    } 
 
</script>

+0

我已經implimented但是你說我圖似乎仍然沒有放大的變化。檢查頁面元素,看起來'rect'屬性會進行轉換,但是圖形看起來不在同一個樣本內。 –

+0

@FayeMatthews,你能重現問題在一個蹲,jsFiddle或stacksnippet?正如你在上面的stacksnippet中看到的,我的代碼確實可以集成到你展示的示例代碼中。現在在你身上重現你的問題。 – Mark

+0

不用擔心,發現問題,你的代碼對我來說工作得很好@Mark。非常感謝你 :) –