d3 を使用して複数のフォース レイアウト グラフを作成し、json ファイルからデータを読み取る際に問題が発生しました。for ループを使用してグラフを反復処理し、それぞれの svg を含む個別の div を作成します。問題は、強制レイアウトが最後に作成されたレイアウトにのみ適用されるため、基本的に他のレイアウトでは左上隅にドットが表示されることです。各反復の最後に for ループを配置することで部分的に解決できましたが、個別の図の相互作用機能はまだ失われています。
以下のコードを見つけてください。
乾杯、マイケル
var color = d3.scale.category20();
var force = new Array();
var div = new Array();
var svg = new Array();
var graph = new Array();
var link;
var node;
var width = 360;
var height = 360;
var brush = new Array();
var shiftKey;
var count = 0;
//loop through the different subsystems in the json-file
for(name_subsystem in graphs) {
//add a div for each subsystem
div[count] = document.createElement("div");
div[count].style.width = "360px";
div[count].style.height = "360px";
div[count].style.cssFloat="left";
div[count].id = name_subsystem;
document.body.appendChild(div[count]);
//force is called. all attributes with default values are noted. see API reference on github.
force[count] = d3.layout.force()
.size([width, height])
.linkDistance(20)
.linkStrength(1)
.friction(0.9)
.charge(-30)
.theta(0.8)
.gravity(0.1);
div[count].appendChild(document.createTextNode(name_subsystem));
//create the svg rectangle in which other elements can be visualised
svg[count] = d3.select("#"+name_subsystem)
.on("keydown.brush", keydown)
.on("keyup.brush", keyup)
.append("svg")
.attr("width", width)
.attr("height", height)
.attr("id",name_subsystem);
brush[count] = svg[count].append("g")
.datum(function() { return {selected: false, previouslySelected: false}; })
.attr("class", "brush");
//force is started
force[count]
.nodes(graphs[name_subsystem].nodes)
.links(graphs[name_subsystem].links)
.start();
//link elements are called, joined with the data, and links are created for each link object in links
link = svg[count].selectAll(".link")
.data(graphs[name_subsystem].links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.thickness); })
.style("stroke", function(d){
if (d.linktype === 'reactant'){
return "black";
} else {
return "red";
}
});
//node elements are called, joined with the data, and circles are created for each node object in nodes
node = svg[count].selectAll(".node")
.data(graphs[name_subsystem].nodes)
.enter().append("circle")
.attr("class", "node")
//radius
.attr("r", 5)
//fill
.attr("fill", function(d) {
if (d.type === 'metabolite') {
return "blue";
} else {
return "red";
}
})
.on("mousedown", function(d) {
if (!d.selected) { // Don't deselect on shift-drag.
if (!shiftKey) node.classed("selected", function(p) { return p.selected = d === p; });
else d3.select(this).classed("selected", d.selected = true);
}
})
.on("mouseup", function(d) {
if (d.selected && shiftKey) d3.select(this).classed("selected", d.selected = false);
})
.call(force[count].drag()
.on("dragstart",function dragstart(d){
d.fixed=true;
d3.select(this).classed("fixed",true);
})
);
//gives titles to nodes. i do not know why this is separated from the first node calling.
node.append("title")
.text(function(d) { return d.name; });
//enable brushing of the network
brush[count].call(d3.svg.brush()
.x(d3.scale.identity().domain([0, width]))
.y(d3.scale.identity().domain([0, height]))
.on("brushstart", function(d) {
node.each(function(d) { d.previouslySelected = shiftKey && d.selected; });
})
.on("brush", function() {
var extent = d3.event.target.extent();
node.classed("selected", function(d) {
return d.selected = d.previouslySelected ^
(extent[0][0] <= d.x && d.x < extent[1][0]
&& extent[0][1] <= d.y && d.y < extent[1][1]);
});
})
.on("brushend", function() {
d3.event.target.clear();
d3.select(this).call(d3.event.target);
})
);
//applies force per step or 'tick'.
force[count].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; });
});
//with this it works partly
//for (var i = 0; i < 5000; ++i)force[count].tick();
count++;
};
function keydown() {
if (!d3.event.metaKey) switch (d3.event.keyCode) {
case 38: nudge( 0, -1); break; // UP
case 40: nudge( 0, +1); break; // DOWN
case 37: nudge(-1, 0); break; // LEFT
case 39: nudge(+1, 0); break; // RIGHT
}
shiftKey = d3.event.shiftKey || d3.event.metaKey;
}
function keyup() {
shiftKey = d3.event.shiftKey || d3.event.metaKey;
}
編集：コメントの後にコードを更新しましたが、それでも同じ問題です。