我正在开发一个显示每日个人工作数据的应用程序。 我将数据存储在名为“dailyTimePerProjectPerWeek”的数组中，现在我定义了 3 周的数据。 我在 html 中放置了两个按钮“上周”和“下周”，用于在几周之间导航。 第一次加载页面时，它会显示与上述数组的最高索引相对应的最近一周。 问题是，它对我来说可视化数据做了一些奇怪的事情，就像我创建了几个图表一样。 如何正确刷新图表图像？ 这是我的 html 代码:
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>Charts4DailyProgress</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<body>
<h1>Weekly Time per Project</h1>
<div id="canvas-container">
<canvas id="ctx" width="1000"></canvas>
<button type="button" onclick="decrementWeek()">Previous Week</button>
<button type="button" onclick="incrementWeek()">Next Week</button>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>
<script src="js/index.js"></script>
</body>
</html>
这是我的 JavaScript 代码:
var dailyTimePerProjectPerWeek =[];
dailyTimePerProjectPerWeek[0] = {
labels: ['M', 'TU','W','TH','F','SA','SU'], // responsible for how many bars are gonna show on the chart
// create 12 datasets, since we have 12 items
// data[0] = labels[0] (data for first bar - 'Standing costs') | data[1] = labels[1] (data for second bar - 'Running costs')
// put 0, if there is no data for the particular bar
datasets: [{
label: 'Master Project. Second Part',
data: [300, 480, 360,180, 240, 300,480],
backgroundColor: '#D4AF37'
}, {
label: 'Guild Ideas - Learning Angular',
data: [60, 0, 240, 180, 120, 0, 60],
backgroundColor: '#C0C0C0'
}, {
label: 'Charts For Daily Progress',
data: [60, 180, 120, 180, 120, 120, 0],
backgroundColor: '#133a7c'
}, {
label: 'Project Manager',
data: [120, 180, 120, 120, 0],
backgroundColor: '#109618'
}, {
label: 'TOOYS',
data: [0, 180, 120, 0, 120, 0,0],
backgroundColor: '#990099'
}, {
label: 'Web Pc Explorer',
data: [0, 0, 120, 180, 0, 120, 0],
backgroundColor: '#54161F'
}, {
label: 'Mind Maps Program',
data: [0, 0, 180, 180, 0, 0, 0],
backgroundColor: '#708238'
}, {
label: 'Chain System',
data: [0, 0, 180, 0, 0, 0],
backgroundColor: '#E86100'
}, {
label: 'Code Generator',
data: [60, 0, 0, 0, 0, 0],
backgroundColor: '#F81894'
}, {
label: 'Electronic Brain',
data: [0, 0, 0, 0, 0, 0,240],
backgroundColor: '#6cc4ee'
}]
}
dailyTimePerProjectPerWeek[1] = {
labels: ['M', 'TU','W','TH','F','SA','SU'], // responsible for how many bars are gonna show on the chart
// create 12 datasets, since we have 12 items
// data[0] = labels[0] (data for first bar - 'Standing costs') | data[1] = labels[1] (data for second bar - 'Running costs')
// put 0, if there is no data for the particular bar
datasets: [{
label: 'Master Project. Second Part',
data: [0, 480, 360,180, 240, 300,480],
backgroundColor: '#D4AF37'
}, {
label: 'Guild Ideas - Learning Angular',
data: [0, 0, 240, 180, 120, 0, 60],
backgroundColor: '#C0C0C0'
}, {
label: 'Charts For Daily Progress',
data: [0, 180, 120, 180, 120, 120, 0],
backgroundColor: '#133a7c'
}, {
label: 'Project Manager',
data: [0, 180, 120, 120, 0],
backgroundColor: '#109618'
}, {
label: 'TOOYS',
data: [0, 180, 120, 0, 120, 0,0],
backgroundColor: '#990099'
}, {
label: 'Web Pc Explorer',
data: [0, 0, 120, 180, 0, 120, 0],
backgroundColor: '#54161F'
}, {
label: 'Mind Maps Program',
data: [0, 0, 180, 180, 0, 0, 0],
backgroundColor: '#708238'
}, {
label: 'Chain System',
data: [0, 0, 180, 0, 0, 0],
backgroundColor: '#E86100'
}, {
label: 'Code Generator',
data: [0, 0, 0, 0, 0, 0],
backgroundColor: '#F81894'
}, {
label: 'Electronic Brain',
data: [0, 0, 0, 0, 0, 0,240],
backgroundColor: '#6cc4ee'
}]
}
dailyTimePerProjectPerWeek[2] = {
labels: ['M', 'TU','W','TH','F','SA','SU'], // responsible for how many bars are gonna show on the chart
// create 12 datasets, since we have 12 items
// data[0] = labels[0] (data for first bar - 'Standing costs') | data[1] = labels[1] (data for second bar - 'Running costs')
// put 0, if there is no data for the particular bar
datasets: [{
label: 'Master Project. Second Part',
data: [300, 480, 360,180, 240, 300,0],
backgroundColor: '#D4AF37'
}, {
label: 'Guild Ideas - Learning Angular',
data: [60, 0, 240, 180, 120, 0, 0],
backgroundColor: '#C0C0C0'
}, {
label: 'Charts For Daily Progress',
data: [60, 180, 120, 180, 120, 120, 0],
backgroundColor: '#133a7c'
}, {
label: 'Project Manager',
data: [120, 180, 120, 120, 0],
backgroundColor: '#109618'
}, {
label: 'TOOYS',
data: [0, 180, 120, 0, 120, 0,0],
backgroundColor: '#990099'
}, {
label: 'Web Pc Explorer',
data: [0, 0, 120, 180, 0, 120, 0],
backgroundColor: '#54161F'
}, {
label: 'Mind Maps Program',
data: [0, 0, 180, 180, 0, 0, 0],
backgroundColor: '#708238'
}, {
label: 'Chain System',
data: [0, 0, 180, 0, 0, 0],
backgroundColor: '#E86100'
}, {
label: 'Code Generator',
data: [60, 0, 0, 0, 0, 0],
backgroundColor: '#F81894'
}, {
label: 'Electronic Brain',
data: [0, 0, 0, 0, 0, 0,0],
backgroundColor: '#6cc4ee'
}]
}
var currentWeek = dailyTimePerProjectPerWeek.length - 1;
var weekValue = currentWeek; //At first time weekValue points to the current week
function drawData(){
var chart = new Chart(ctx, {
type: 'bar',
data: dailyTimePerProjectPerWeek[weekValue],
options: {
responsive: false,
legend: {
position: 'right' // place legend on the right side of chart
},
scales: {
xAxes: [{
stacked: true // this should be set to make the bars stacked
}],
yAxes: [{
stacked: true // this also..
}]
}
}
});
}
function incrementWeek(){
if(weekValue === dailyTimePerProjectPerWeek.length - 1){
console.log("This is the current week");
} else {
weekValue += 1;
drawData();
}
}
function decrementWeek(){
if(weekValue === 0){
console.log("This is the oldest week of the time series");
} else {
weekValue -= 1;
drawData();
}
}
/*
function selectWeek(){
}
*/
/*
function fixWeek(){
}*/
//Main Program
var chart = new Chart(ctx, {
type: 'bar',
data: dailyTimePerProjectPerWeek[weekValue],
options: {
responsive: false,
legend: {
position: 'right' // place legend on the right side of chart
},
scales: {
xAxes: [{
stacked: true // this should be set to make the bars stacked
}],
yAxes: [{
stacked: true // this also..
}]
}
}
});
事实是我使用以下代码来尝试刷新图像:
function drawData(){
var chart = new Chart(ctx, {
type: 'bar',
data: dailyTimePerProjectPerWeek[weekValue],
options: {
responsive: false,
legend: {
position: 'right' // place legend on the right side of chart
},
scales: {
xAxes: [{
stacked: true // this should be set to make the bars stacked
}],
yAxes: [{
stacked: true // this also..
}]
}
}
});
}
最佳答案
将您的 drawData() 函数更改为:
function drawData() {
chart.data = dailyTimePerProjectPerWeek[weekValue];
chart.update();
}
关于javascript - 使用chart.js刷新图表的图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53745178/