Javascript 使用日期范围选择器更新图表JS
我试图根据使用ajax选择的日期和班次更新图表。我的ajax调用返回如下数组:Javascript 使用日期范围选择器更新图表JS,javascript,php,ajax,chart.js,Javascript,Php,Ajax,Chart.js,我试图根据使用ajax选择的日期和班次更新图表。我的ajax调用返回如下数组: 0 date "2017-11-20" shift "Day Shift" availability 100 1 date "2017-11-21" shift "Day Shift" availability 63.63636363636363 2 date "2017-11-22" shift "Day Shift" availability 63
0
date "2017-11-20"
shift "Day Shift"
availability 100
1
date "2017-11-21"
shift "Day Shift"
availability 63.63636363636363
2
date "2017-11-22"
shift "Day Shift"
availability 63.63636363636363
3
date "2017-11-23"
shift "Day Shift"
availability 63.63636363636363
4
date "2017-11-24"
shift "Day Shift"
availability 14.285714285714285
5
date "2017-11-20"
shift "Night Shift"
availability 67.56756756756756
6
date "2017-11-21"
shift "Night Shift"
availability 67.56756756756756
7
date "2017-11-22"
shift "Night Shift"
availability 67.56756756756756
8
date "2017-11-23"
shift "Night Shift"
availability 67.56756756756756
// on change event
var request;
$('input').on('change', function(event) {
console.log('changed');
event.preventDefault();
// Abort any pending request
if (request) {
request.abort();
}
var rangeStart = moment($('#daterange').data('daterangepicker').startDate).unix();
var rangeEnd = moment($('#daterange').data('daterangepicker').endDate).unix();
var shift = 'all';
request = $.ajax({
url: "report_availability.php",
type: "post",
data: {
rangeStart: rangeStart,
rangeEnd: rangeEnd,
shift: shift
}
});
request.done(function (response, textStatus){
drawChart(response);
});
request.fail(function (textStatus, errorThrown){
// Log the error to the console
console.error(
"The following error occurred: "+
textStatus, errorThrown
);
});
request.always(function () {
console.log('request finished');
});
});
function drawChart(data) {
var dates = [];
var shift1Score = [];
var shift2Score = [];
for(var i in data) {
var found = jQuery.inArray(data[i].date, dates);
if (found < 0) {
dates.push(data[i].date);
}
if(data[i].shift == 'Day Shift' ) {
shift1Score.push(data[i].availability);
} else {
shift2Score.push(data[i].availability);
}
}
// Destroy the chart if it already exists
// NOT WORKING
if(myChart!=null){
myChart.destroy();
console.log('destroy');
}
var ctx = document.getElementById("myChart").getContext('2d');
ctx.canvas.height = 50;
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: dates,
datasets: [
{
label: "Day Shift",
backgroundColor: "#3e95cd",
data: shift1Score
}, {
label: "Night Shift",
backgroundColor: "#8e5ea2",
data: shift2Score
}
]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
},
responsive: true,
maintainAspectRatio: false
}
});
}
我的javascript如下所示:
0
date "2017-11-20"
shift "Day Shift"
availability 100
1
date "2017-11-21"
shift "Day Shift"
availability 63.63636363636363
2
date "2017-11-22"
shift "Day Shift"
availability 63.63636363636363
3
date "2017-11-23"
shift "Day Shift"
availability 63.63636363636363
4
date "2017-11-24"
shift "Day Shift"
availability 14.285714285714285
5
date "2017-11-20"
shift "Night Shift"
availability 67.56756756756756
6
date "2017-11-21"
shift "Night Shift"
availability 67.56756756756756
7
date "2017-11-22"
shift "Night Shift"
availability 67.56756756756756
8
date "2017-11-23"
shift "Night Shift"
availability 67.56756756756756
// on change event
var request;
$('input').on('change', function(event) {
console.log('changed');
event.preventDefault();
// Abort any pending request
if (request) {
request.abort();
}
var rangeStart = moment($('#daterange').data('daterangepicker').startDate).unix();
var rangeEnd = moment($('#daterange').data('daterangepicker').endDate).unix();
var shift = 'all';
request = $.ajax({
url: "report_availability.php",
type: "post",
data: {
rangeStart: rangeStart,
rangeEnd: rangeEnd,
shift: shift
}
});
request.done(function (response, textStatus){
drawChart(response);
});
request.fail(function (textStatus, errorThrown){
// Log the error to the console
console.error(
"The following error occurred: "+
textStatus, errorThrown
);
});
request.always(function () {
console.log('request finished');
});
});
function drawChart(data) {
var dates = [];
var shift1Score = [];
var shift2Score = [];
for(var i in data) {
var found = jQuery.inArray(data[i].date, dates);
if (found < 0) {
dates.push(data[i].date);
}
if(data[i].shift == 'Day Shift' ) {
shift1Score.push(data[i].availability);
} else {
shift2Score.push(data[i].availability);
}
}
// Destroy the chart if it already exists
// NOT WORKING
if(myChart!=null){
myChart.destroy();
console.log('destroy');
}
var ctx = document.getElementById("myChart").getContext('2d');
ctx.canvas.height = 50;
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: dates,
datasets: [
{
label: "Day Shift",
backgroundColor: "#3e95cd",
data: shift1Score
}, {
label: "Night Shift",
backgroundColor: "#8e5ea2",
data: shift2Score
}
]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
},
responsive: true,
maintainAspectRatio: false
}
});
}
//关于更改事件
var请求;
$('input')。关于('change',函数(事件){
console.log('changed');
event.preventDefault();
//中止任何挂起的请求
如果(请求){
request.abort();
}
var rangeStart=moment($('#daterange').data('daterangepicker').startDate.unix();
var rangeEnd=moment($('#daterange').data('daterangepicker').endDate.unix();
var-shift='all';
请求=$.ajax({
url:“report_availability.php”,
类型:“post”,
数据:{
rangeStart:rangeStart,
rangeEnd:rangeEnd,
班次:班次
}
});
请求完成(功能(响应、文本状态){
图纸(响应);
});
request.fail(函数(textStatus,errorshown){
//将错误记录到控制台
控制台错误(
“发生了以下错误:”+
文本状态,错误抛出
);
});
request.always(函数(){
log('request finished');
});
});
功能图(数据){
var日期=[];
var-shift1得分=[];
var shift2Score=[];
用于(数据中的var i){
var found=jQuery.inArray(数据[i]。日期,日期);
如果(发现<0){
dates.push(数据[i].date);
}
如果(数据[i].shift==“白班”){
shift1Score.push(数据[i].可用性);
}否则{
shift2Score.push(数据[i].可用性);
}
}
//如果图表已经存在,请销毁它
//不起作用
如果(myChart!=null){
myChart.destroy();
console.log('destroy');
}
var ctx=document.getElementById(“myChart”).getContext(“2d”);
ctx.canvas.height=50;
var myChart=新图表(ctx{
类型:'bar',
数据:{
标签:日期,
数据集:[
{
标签:“白班”,
背景色:“3e95cd”,
数据:1分
}, {
标签:“夜班”,
背景色:“8e5ea2”,
数据:得分
}
]
},
选项:{
比例:{
雅克斯:[{
滴答声:{
贝吉纳泽罗:是的
}
}]
},
回答:是的,
MaintaintAspectRatio:false
}
});
}
我对此有两个问题:
问题1:图表没有被销毁,所以当我重新绘制它时,它只是在旧图表的顶部重新绘制,这会导致悬停事件出现问题。我曾尝试使用chart.update()解决此问题,但这似乎只是添加到原始数据中,而不是替换它
编辑:-我已通过移除画布然后创建新画布解决了问题1:-
$('#myChart').remove();
$('#chartBar').append('<canvas id="myChart"></canvas>');
$(“#myChart”).remove();
$('#chartBar')。附加('');
问题2:有两个以上的班次。。有时高达5,我不想硬编码所有这些。我想根据数组中返回的移位数绘制每个数据集,我愿意在php或javascript中更改数组结构,但似乎无法确定正确的数组结构或如何为图表构建动态数据集数组
图表应按如下方式输出两班:
任何帮助都会很好的,谢谢我和你有同样的问题 为了更新图形,我使用了两个函数: 删除当前图形中的所有数据集:
function removeDataset(chart) {
chart.data.datasets = [];
};
将新数据集添加到图形中:
function addDataset(chart, name, data, background, border, fill) {
var newDataset = {
label: name,
data: [],
backgroundColor: background,
borderColor: border,
fill: fill
};
for (var index = 0; index < data.length; ++index) {
newDataset.data.push(data[index]);
}
chart.data.datasets.push(newDataset);
};
要声明该图,我使用:
var ctx1;
$(document).ready(function () {
var canvas1 = $("#canvas1")[0];
canvas1.height = "300";
ctx1 = new Chart(canvas1, config_ctx1);
});
我希望能有帮助。谢谢你的回复,这看起来不错,但是当我试过后,我无法让它工作,可能是我太累了。我将稍后再试,感谢我已再次尝试并使其工作,但前提是我不删除轴标签。如果我删除轴标签并尝试推送新标签,似乎会将它们全部合并在一起,而不是添加x个标签。。您对此有解决方法吗?我已经解决了标签问题,将数组中的每个项目分别推送,而不是推送整个数组。