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我最近開始試圖教自己D3,並且讓我的腦袋圍繞着輸入,更新和退出範例。試圖用新數據更新d3.js圈子
下面我有一些我正在嘗試使用的進度圈的示例;
http://plnkr.co/edit/OoIL8v6FemzjzoloJxtQ?p=preview
現在,這裏的目的是不刪除這些更新循環路徑,我認爲我不應該使用exit函數?在這種情況下,我的印象是我可以在一個新函數中更新我的數據源,然後調用路徑轉換,並獲得我更新的值。然而,這種情況並非如此。
我想知道如果有人能幫助我,並告訴我我要去哪裏錯了嗎?
var dataset = [{
"vendor-name": "HP",
"overall-score": 45
}, {
"vendor-name": "CQ",
"overall-score": 86
}];
var dataset2 = [{
"vendor-name": "HP",
"overall-score": 22
}, {
"vendor-name": "CQ",
"overall-score": 46
}];
var width = 105,
height = 105,
innerRadius = 85;
var drawArc = d3.svg.arc()
.innerRadius(innerRadius/2)
.outerRadius(width/2)
.startAngle(0);
var vis = d3.select("#chart").selectAll("svg")
.data(dataset)
.enter()
.append('svg')
.attr('width', width)
.attr('height', height)
.append('g')
.attr("transform", "translate(" + width/2 + "," + height/2 + ")");
vis.append("circle")
.attr("fill", "#ffffff")
.attr("stroke", "#dfe5e6")
.attr("stroke-width", 1)
.attr('r', width/2);
vis.append("path")
.attr("fill", "#21addd")
.attr('class', 'arc')
.each(function(d) {
d.endAngle = 0;
})
.attr('d', drawArc)
.transition()
.duration(1200)
.ease('linear')
.call(arcTween);
vis.append('text')
.text(0)
.attr("class", "perc")
.attr("text-anchor", "middle")
.attr('font-size', '36px')
.attr("y", +10)
.transition()
.duration(1200)
.tween(".percentage", function(d) {
var i = d3.interpolate(this.textContent, d['overall-score']),
prec = (d.value + "").split("."),
round = (prec.length > 1) ? Math.pow(10, prec[1].length) : 1;
return function(t) {
this.textContent = Math.round(i(t) * round)/round + "%";
};
});
function updateChart() {
vis = vis.data(dataset2)
vis.selectAll("path")
.transition()
.duration(1200)
.ease('linear')
.call(arcTween);
vis.selectAll('text')
.transition()
.duration(1200)
.tween(".percentage", function(d) {
var i = d3.interpolate(this.textContent, d['overall-score']),
prec = (d.value + "").split("."),
round = (prec.length > 1) ? Math.pow(10, prec[1].length) : 1;
return function(t) {
this.textContent = Math.round(i(t) * round)/round + "%";
};
});
}
function arcTween(transition, newAngle) {
transition.attrTween("d", function(d) {
var interpolate = d3.interpolate(0, 360 * (d['overall-score']/100) * Math.PI/180);
return function(t) {
d.endAngle = interpolate(t)
return drawArc(d);
};
});
}
任何幫助/建議非常感謝!
感謝所有
沒關係啊,感謝您的回答!現在對我來說更有意義:) – lolio