我使用force-layout将所有节点向右移动,使用下面的代码。但是当调用函数时,只有节点移位,文本和链接保持不变。究竟缺少什么?是否必须在函数内调用tick()函数?
function(){ d3.select(".nodes").attr("transform", "translate(200,0)");
simulation.alpha(0.8).restart();
};
simulation
.nodes(nodes)
.on("tick", function(d)
{
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; });
text
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; });
}
);
simulation.force("link")
.links(links);
});
答案 0 :(得分:2)
您的函数仅移动包含节点的g。它不会更新附加到节点的基础数据(d.x和d.y)。因此,虽然它们在视觉上移动,但它不是因为力(或您的代码)更新了d.x或d.y值。
答案 1 :(得分:1)
正如@TomShanley在his answer中所说,你只是在翻译包含<g>
个元素。
fx
和fy
,或者使用forceY
和forceY
(均在D3 v4中)。
这是使用forceX
的演示。首先,我们移除center
力,然后将forceX
设置为右侧的位置:
simulation.force("center", null)
simulation.force("toRight", d3.forceX(360).strength(0.8))
这是演示,单击按钮移动节点,链接和文本:
var width = 400;
var height = 300;
var svg = d3.select("body")
.append("svg")
.attr("width", width)
.attr("height", height);
var nodes = [{
name: "foo",
color: "blue"
}, {
name: "bar",
color: "green"
}, {
name: "baz",
color: "red"
}, {
name: "foofoo",
color: "yellow"
}, {
name: "foobar",
color: "blue"
}, {
name: "foobaz",
color: "green"
}, {
name: "barfoo",
color: "red"
}, {
name: "barbar",
color: "yellow"
}, {
name: "barbaz",
color: "blue"
}];
var links = [{
"source": 0,
"target": 1
}, {
"source": 0,
"target": 2
}, {
"source": 0,
"target": 3
}, {
"source": 1,
"target": 3
}, {
"source": 1,
"target": 4
}, {
"source": 2,
"target": 5
}, {
"source": 3,
"target": 6
}, {
"source": 1,
"target": 7
}, {
"source": 6,
"target": 8
}, {
"source": 0,
"target": 7
}, {
"source": 2,
"target": 6
}, {
"source": 3,
"target": 8
}];
var simulation = d3.forceSimulation()
.force("link", d3.forceLink())
.force("charge", d3.forceManyBody().strength(-50))
.force("center", d3.forceCenter(width / 2, height / 2))
.force("collide", d3.forceCollide(function(d) {
return d.r + 1;
}));
var link = svg.selectAll(null)
.data(links)
.enter()
.append("line")
.style("stroke", "#ccc")
.style("stroke-width", 1);
var node = svg.selectAll(null)
.data(nodes)
.enter()
.append("circle")
.attr("r", function(d) {
return d.r = 10;
})
.attr("stroke", "gray")
.attr("stroke-width", "2px")
.attr("fill", function(d) {
return d.color
})
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));;
var text = svg.selectAll(null)
.data(nodes)
.enter()
.append("text")
.attr("pointer-events", "none")
.style("fill", "black")
.attr("dy", "-1em")
.attr("dx", "-1em")
.text(function(d) {
return d.name;
});
simulation.nodes(nodes);
simulation.force("link")
.links(links);
simulation.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
});
text.attr("x", function(d) {
return d.x
}).attr("y", 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;
}
d3.select("button").on("click", function(d) {
simulation.force("center", null)
simulation.force("toRight", d3.forceX(360).strength(0.8))
simulation.alpha(0.8).restart();
})
&#13;
<script src="https://d3js.org/d3.v4.js"></script>
<button>Click me</button>
<br>
&#13;