我正在创建一个d3 sunburst图表,需要整合选择旋转,例如此处所见的旋转:http://bl.ocks.org/musically-ut/4678148,其中包含选择失真(仅部分缩放到选定路径)。我创建了一个jsFiddle:https://jsfiddle.net/h943x6yu/,突出了我将两者结合起来的尝试。这张图表会扭曲和旋转,但旋转是不可预测的。我希望所选路径旋转到顶部12点钟位置,而不管它在图形上的位置(如第一个链接中所示)。任何建议将不胜感激。
d3.json("flare.json", function(error, root) {
if (error) throw error;
var g = svg.selectAll("g")
.data(partition.nodes(root))
.enter().append("g");
path = g.append("path")
.attr("d", arc)
.style("fill", function(d) { return color((d.children ? d : d.parent).name); })
.on("click", magnify)
// .on('mouseover', tip.show)
// .on('mouseout', tip.hide)
.each(stash);
var text = g.append("text")
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
.attr("x", function(d) { return y(d.y); })
.attr("dx", "6") // margin
.attr("dy", ".35em") // vertical-align
.text(function(d) {
return d.name;
})
.attr('font-size', function(d) {
if (d.value < 100000) {
return '10px'
} else {
return '20px';
}
})
.on("click", magnify);
var innerG = d3.selectAll("g.inner");
// Distort the specified node to 80% of its parent.
function magnify(node) {
text.transition().attr("opacity", 0);
spin(node);
if (parent = node.parent) {
var parent,
x = parent.x,
k = 0.8;
console.log(x)
parent.children.forEach(function(sibling) {
x += reposition(sibling, x, sibling === node
? parent.dx * k / node.value
: parent.dx * (1 - k) / (parent.value - node.value));
});
} else {
reposition(node, 0, node.dx / node.value);
}
path.transition()
.duration(750)
.attrTween("d", arcTween)
.each("end", function(e, i) {
// check if the animated element's data e lies within the visible angle span given in node
if (e.x >= node.x && e.x < (node.x + node.dx)) {
// get a selection of the associated text element
var arcText = d3.select(this.parentNode).select("text");
// fade in the text element and recalculate positions
arcText.transition().duration(750)
.attr("opacity", 1)
.attr("transform", function() { return "rotate(" + computeTextRotation(e) + ")" })
.attr("x", function(d) {
return y(d.y);
});
}
});
}
function spin(d) {
var newAngle = - (d.x + d.dx / 2);
innerG
.transition()
.duration(1500)
.attr("transform", "rotate(" + ((180 / Math.PI * newAngle) - 90) + ")");
path
.classed("selected", function (x) { return d.name == x.name; });
}
// Recursively reposition the node at position x with scale k.
function reposition(node, x, k) {
// console.log(node)
node.x = x;
if (node.children && (n = node.children.length)) {
var i = -1, n;
while (++i < n) x += reposition(node.children[i], x, k);
}
return node.dx = node.value * k;
}
// Stash the old values for transition.
function stash(d) {
d.x0 = d.x;
d.dx0 = d.dx;
}
// Interpolate the arcs in data space.
function arcTween(a) {
var i = d3.interpolate({x: a.x0, dx: a.dx0}, a);
return function(t) {
var b = i(t);
a.x0 = b.x;
a.dx0 = b.dx;
return arc(b);
};
};
});
答案 0 :(得分:0)
嗯,经过大量的修修补补后,我想通了。我不知道这是否是最佳解决方案,但它确实有效。
我设置了一个x和y变量:
var x = d3.scale.linear()
.range([0, 2 * Math.PI]);
var y = d3.scale.linear()
.range([0, radius]);
然后我像这样设置我的弧:
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(0, y(d.y)) })
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)) })
.cornerRadius(function(d) { return 5;});
以上是我原来的jsFiddle示例。
当调用我的原始旋转函数(onClick)时,它就像这样运行:
function spin(d) {
var newAngle = - (d.x + d.dx / 2);
console.log('newAngle', newAngle)
innerG
.transition()
.duration(1500)
.attr("transform", "rotate(" + ((180 / Math.PI * newAngle) - 90) + ")");
path
.classed("selected", function (x) { return d.name == x.name; });
}
这给了我一个不可预测的旋转。稍微修补一下后,我意识到如果我通过之前实例化的x变量运行自旋变换,然后点击旋转两次,它将每次校正到-90度。此时我在变换上删除了-90并创建了一个promise / then函数来运行它两次:
function spin(d) {
var spin1 = new Promise (function(resolve, reject) {
var newAngle = - x(d.x + d.dx / 2);
console.log('newAngle', newAngle)
innerG
.transition()
.duration(1500)
.attr("transform", "rotate(" + ((180 / Math.PI * newAngle)) + ")");
resolve("Success!");
});
spin1.then(function() {
var newerAngle = - x(d.x + d.dx / 2);
console.log('newerAngle', newerAngle)
innerG
.transition()
.duration(1500)
.attr("transform", "rotate(" + ((180 / Math.PI * newerAngle)) + ")");
})
path
.classed("selected", function (x) { return d.name == x.name; });
}
这可能有点hackie但效果很好。在此处查看最终结果:https://jsfiddle.net/d28nw97x/1/