[英]bar chart transition, strange behavior d3.js
我很好奇是否有人可以指出我在這里做錯了什么? 我希望我的代碼能夠在單擊事件上產生平穩的過渡,相反,第一次單擊只會移動x軸標簽(為什么?如何解決此問題?),然后第二/第三次進行排序。 有辦法防止這種情況發生嗎? 我想對首次點擊進行排序,如果我的標簽沒有跳來跳去,那肯定會很好。 我在這里想念什么?
http://jsbin.com/cohaziqugo/edit?js,輸出
var data = [{"name":"A","value":0.08167},{"name":"B","value":0.01492},{"name":"C","value":0.0278},{"name":"D","value":0.04253},{"name":"E","value":0.12702},{"name":"F","value":0.02288},{"name":"G","value":0.02022},{"name":"H","value":0.06094},{"name":"I","value":0.06973},{"name":"J","value":0.00153},{"name":"K","value":0.00747},{"name":"L","value":0.04025},{"name":"M","value":0.02517},{"name":"N","value":0.06749},{"name":"O","value":0.07507},{"name":"P","value":0.01929},{"name":"Q","value":0.00098},{"name":"R","value":0.05987},{"name":"S","value":0.06333},{"name":"T","value":0.09056},{"name":"U","value":0.02758},{"name":"V","value":0.01037},{"name":"W","value":0.02465},{"name":"X","value":0.0015},{"name":"Y","value":0.01971},{"name":"Z","value":0.00074}];
var tickValues = data.map(function (d){return d.name;});
var step = Math.floor(tickValues.length / 24);
var indexes = d3.range(0,tickValues.length, step);
if (indexes.indexOf(tickValues.length - 1) == -1){
indexes.push(tickValues.length - 1);
}
var tickArray = d3.permute(tickValues, indexes);
var margin = { top: 40, right: 20, bottom: 30, left: 40 },
width = 1500 - margin.left - margin.right,
height = 600 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.domain(data.map(function (d) { return d.name; }))
.rangeBands([0, width], 0.1, 0.35);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickValues(tickArray);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var barChart = d3.select("#barbarchart1").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
y.domain([0, 0.2]);
barChart.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-0.8em")
.attr("dy", "0.15em")
.attr("transform", function(d){
return "rotate(-65)"
});
barChart.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Test");
barChart.selectAll("#bar")
.data(data)
.enter().append("rect")
.attr("id", "bar")
.attr("x", function (d) { return x(d.name); })
.attr("width", x.rangeBand())
.attr("y", function (d) { return y(d.value); })
.attr("fill", "grey")
.attr("height", function (d) { return height - y(d.value); })
.on("click", function() {sortBars();})
.on("mouseover", function(d){
var xPos = parseFloat(d3.select(this).attr("x"));
var yPos = parseFloat(d3.select(this).attr("y"));
var height = parseFloat(d3.select(this).attr("height"));
var width = parseFloat(d3.select(this).attr("width"));
d3.select(this).attr("fill", "red");
barChart.append("text")
.attr("x",xPos)
.attr("y", yPos - 3)
.attr("font-family", "sans-serif")
.attr("font-size", "10px")
.attr("font-weight", "bold")
.attr("fill", "black")
.attr("text-anchor", "middle")
.attr("id", "tooltip")
.attr("transform", "translate(" + width/2 + ")")
.text(d.name +": "+ d.value);
})
.on("mouseout", function(){
barChart.selectAll("#tooltip").remove();
d3.select(this).attr("fill", "grey");
});
var sortOrder = true;
var sortBars = function() {
//Flip value of sortOrder
sortOrder = !sortOrder;
var x0 = x.domain(data.sort(sortOrder
? function(a, b) { return b.value - a.value; }
: function(a, b) { return d3.ascending(a.name, b.name); })
.map(function(d) { return d.name; }))
.copy();
barChart.selectAll("#bar")
.sort(function(a, b) { return x0(a.name) - x0(b.name); });
var transition = barChart.transition().duration(750),
delay = function(d, i) { return i * 50; };
transition.selectAll("#bar")
.delay(delay)
.attr("x", function(d) { return x0(d.name); });
transition.select(".x.axis")
.call(xAxis)
.selectAll("text")
.selectAll("g")
.delay(delay)
;};
function type(d) {
d.value = +d.value;
return d;
}
我的解決方案: http : //jsbin.com/cequrabuqi/edit?js,輸出
第一次點擊只會移動x軸標簽
data
的默認排序是升序。 第一次單擊時,將sortOrder
從true翻轉為false,從而使三元條件選擇function(a, b) { return d3.ascending(a.name, b.name); })
function(a, b) { return d3.ascending(a.name, b.name); })
作為排序順序,但仍在上升。 代碼正確無誤,但看起來很糟糕,因為排序順序在第一次單擊時就不會改變,因此屏幕上的條沒有任何變化。
如果我的標簽不跳動會很好。
我不完全了解D3,但是似乎發生的是當您調用transition.select(".x.axis").call(xAxis)
,它會刪除您應用的所有樣式。 因此,在我的解決方案中,每次調用sort函數時,我都會重新應用樣式。
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