我一直在努力学习d3.drag,将其整合到v4的sankey图表中,类似于this example。
起点是Mikes圈子拖动示例here我试图与对象+文本拖动实现here集成。
可悲的是,我无法理解如何抓住“g'元素使用d3.drag。
过去几天已经进行了几次迭代,但我认为我最接近的是下面的示例,它只会抓取一个特定的拖动矩形(我怀疑我可能已经使用了'这个& #39;)
var margin = {top: 10, right: 10, bottom: 30, left: 10},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var rectangles = d3.range(20).map(function() {
return {
x: Math.round(Math.random() * (width)),
y: Math.round(Math.random() * (height))
};
});
var color = d3.scaleOrdinal(d3.schemeCategory20);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
var group = svg.append("g")
.data(rectangles)
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")")
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
group.selectAll("rect")
.data(rectangles)
.enter().append("rect")
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; })
.attr("height", 60)
.attr("width", 30)
.style("fill", function(d, i) { return color(i); });
group.selectAll("text")
.data(rectangles)
.enter().append("text")
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; })
.attr("text-anchor", "start")
.style("fill", "steelblue")
.text("Close");
function dragstarted(d) {
d3.select(this).raise().classed("active", true);
}
function dragged(d) {
d3.select(this).select("text").attr("x", d.x = d3.event.x).attr("y", d.y = d3.event.y);
d3.select(this).select("rect").attr("x", d.x = d3.event.x).attr("y", d.y = d3.event.y);
}
function dragended(d) {
d3.select(this).classed("active", false);
}

.active {
stroke: #000;
stroke-width: 2px;
}
.rect {
pointer-events: all;
stroke: none;
stroke-width: 40px;
}

<script src="//d3js.org/d3.v4.min.js"></script>
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我尝试按照here的答案实现代码,这是一个非常类似的代码,但是从力图中移动所涉及的更改也让我失败了。
任何指导意见。我觉得我错过了一些基本的东西。
答案 0 :(得分:2)
我稍稍调整了你的代码。我将矩形和文本分组,并将拖动属性添加到组中。因此,当我们拖动时,文本和矩形都会在接收器中移动。
<select ng-model="opt">
<option ng-repeat="option in data"
value="{{option}}" >{{option.name}}
</option>
</select>
var margin = {top: 10, right: 10, bottom: 30, left: 10},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var rectangles = d3.range(10).map(function() {
return {
x: Math.round(Math.random() * (width)),
y: Math.round(Math.random() * (height))
};
});
var color = d3.scaleOrdinal(d3.schemeCategory20);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
var group = svg.selectAll('g')
.data(rectangles).enter().append("g").attr("transform",
"translate(" + margin.left + "," + margin.top + ")")
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
group.append("rect")
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; })
.attr("height", 60)
.attr("width", 30)
.style("fill", function(d, i) { return color(i); });
group.append("text")
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; })
.attr("text-anchor", "start")
.style("fill", "steelblue")
.text("Close");
function dragstarted(d) {
d3.select(this).raise().classed("active", true);
}
function dragged(d) {
d3.select(this).select("text").attr("x", d.x = d3.event.x).attr("y", d.y = d3.event.y);
d3.select(this).select("rect").attr("x", d.x = d3.event.x).attr("y", d.y = d3.event.y);
}
function dragended(d) {
d3.select(this).classed("active", false);
}
.active {
stroke: #000;
stroke-width: 2px;
}
.rect {
pointer-events: all;
stroke: none;
stroke-width: 40px;
}
希望这有帮助。
答案 1 :(得分:2)
您还可以尝试这种分组和移动组的替代方法。
Chain of Responsability
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var margin = {top: 10, right: 10, bottom: 30, left: 10},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var rectangles = d3.range(10).map(function() {
return {
x: Math.round(Math.random() * (width)),
y: Math.round(Math.random() * (height))
};
});
var color = d3.scaleOrdinal(d3.schemeCategory20);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
var group = svg.selectAll('g')
.data(rectangles)
.enter().append("g")
.attr("transform",function(d) {
return "translate(" + (margin.left + d.x) + "," + (margin.top + d.y) + ")"
})
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
group.append("rect")
.attr("height", 60)
.attr("width", 30)
.style("fill", function(d, i) { return color(i); });
group.append("text")
.attr("text-anchor", "start")
.style("fill", "steelblue")
.text("Close");
function dragstarted(d) {
d._drag = {
distance:0,
threshold:2,
initiated: false
};
}
function dragged(d) {
if (!d._drag.initiated) {
d._drag.initiated = true;
d3.select(this).raise().classed("active", true);
}
d._drag.distance += d3.event.dx * d3.event.dx + d3.event.dy * d3.event.dy;
d.x = d3.event.x;
d.y = d3.event.y;
d3.select(this).attr('transform', 'translate('+[d.x,d.y]+')');
}
function dragended(d) {
if (d._drag.distance < d._drag.threshold) {
d3.select(window).on('click.drag', null);
return;
}
d3.select(this).classed("active", false);
}
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.active {
stroke: #000;
stroke-width: 2px;
}
.rect {
pointer-events: all;
stroke: none;
stroke-width: 40px;
}
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