尝试向Queue.js中添加XHR以显示进度 [英] Trying to add an XHR to Queue.js to show progress
问题描述
我想通过以下代码将进度表添加到我的文件:
进度事件
我有一个进度正常的XHR,如下所示:
d3.csv(data / WLAN2.csv)
.on(progress,function(){
var i = d3.interpolate(progress,d3.event.loaded / d3.event.total);
d3.transition()。tween(progress,function(){
return function(t){
progress = i(t);
foreground.attr(d,arc.endAngle(twoPi * progress));
text.text(formatPercent(progress));
};
});
)
.get(function(error,data){
meter.transition()。delay(250).attr(transform,scale(0));
}现在尝试使用Queue.js添加它,并且它不工作: >
queue()
.defer(d3.csv(data / WLAN2.csv)
.on progress,function(){
var i = d3.interpolate(progress,d3.event.loaded / d3.event.total);
d3.transition()。tween(progress,function(){
return function(t){
progress = i(t);
foreground.attr d,arc.endAngle(twoPi * progress));
text.text(formatPercent(progress));
};
}
})
.get(function(error,data){
meter.transition()。delay(250).attr(transform,scale(0) b $ b})
)
.await(transformData);
我收到错误:
TypeError:Object#没有方法'apply'
如果我尝试一个非常小的版本,它的工作原理:
queue()
.defer(d3.csv(data / WLAN2.csv)
.on(progress,function(){
console.log(Loading data / WLAN2.csv:,formatPercent(d3.event.loaded / d3.event.total));})
.get)
.await ;
任何帮助是赞赏,我不明白为什么它不工作。我想我可以只传递一个有效的XHR到Queue.js。
解决方案 Queue.js期望得到一个函数接受回调参数。在你的代码中,你传递一个evaluate函数,所以它不会工作。以下代码应该。
queue()
.defer(function(f){
d3。 csv(data / WLAN2.csv)
.on(progress,function(){
var i = d3.interpolate(progress,d3.event.loaded / d3.event.total) ;
d3.transition()。tween(progress,function(){
return function(t){
progress = i(t);
foreground.attr d,arc.endAngle(twoPi * progress));
text.text(formatPercent(progress));
};
});
} b .get(function(error,data){
meter.transition()。delay(250).attr(transform,scale(0));
f
})
})
.await(transformData);
I am trying to add a progress meter to my files by following this code:
Progress Events
I have an XHR with progress working fine like so:
d3.csv("data/WLAN2.csv")
.on("progress", function() {
var i = d3.interpolate(progress, d3.event.loaded / d3.event.total);
d3.transition().tween("progress", function() {
return function(t) {
progress = i(t);
foreground.attr("d", arc.endAngle(twoPi * progress));
text.text(formatPercent(progress));
};
});
})
.get(function(error, data) {
meter.transition().delay(250).attr("transform", "scale(0)");
})
I now try to add this with Queue.js and it does not work:
queue()
.defer(d3.csv("data/WLAN2.csv")
.on("progress", function() {
var i = d3.interpolate(progress, d3.event.loaded / d3.event.total);
d3.transition().tween("progress", function() {
return function(t) {
progress = i(t);
foreground.attr("d", arc.endAngle(twoPi * progress));
text.text(formatPercent(progress));
};
});
})
.get(function(error, data) {
meter.transition().delay(250).attr("transform", "scale(0)");
})
)
.await(transformData);
I get the error:
Uncaught TypeError: Object # has no method 'apply'
If I try a very dumbed down version, it works:
queue()
.defer(d3.csv("data/WLAN2.csv")
.on("progress", function() {
console.log("Loading data/WLAN2.csv: ",formatPercent(d3.event.loaded/d3.event.total)); })
.get)
.await(transformData);
Any help is appreciated, I don't understand why its not working. I thought I could just pass in a valid XHR to Queue.js.
解决方案 Queue.js expects to be given a function that accepts a callback argument. In your code, you're passing an evaluated function, so it won't work. The following code should.
queue()
.defer(function(f) {
d3.csv("data/WLAN2.csv")
.on("progress", function() {
var i = d3.interpolate(progress, d3.event.loaded / d3.event.total);
d3.transition().tween("progress", function() {
return function(t) {
progress = i(t);
foreground.attr("d", arc.endAngle(twoPi * progress));
text.text(formatPercent(progress));
};
});
})
.get(function(error, data) {
meter.transition().delay(250).attr("transform", "scale(0)");
f(error, data);
})
})
.await(transformData);
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