我在画布上显示水平根据下面的用户是我的代码问题是在第一级剪辑图像后下一张图和动画停止工作。
canvas包含一个json数组，用于绘制级别levels
保持从静态形状和函数开始的方法，以动画开始使用动画帧来为线条或圆圈设置动画。
HTML：
<!DOCTYPE html>
<html>
<head>
<title>Canvas</title>
</head>
<body>
<canvas id="levelchart" data-levels="[{"text":"Mark","dotcolor":"#28912e","linecolor":"#28912e","current":"0","completed":"1","image":"http:\/\/nessgoods.com\/timthumb.php?src=http:\/\/www.nessgoods.com\/upload\/users\/3\/pills_311869.jpg&q=100"},{"text":5,"dotcolor":"#28912e","linecolor":"#28912e","current":"0","pending":"0","completed":"1"},{"text":25,"dotcolor":"#28912e","linecolor":"#28912e","current":"0","pending":"0","completed":"1"},{"text":125,"dotcolor":"#28912e","linecolor":"#28912e","current":"0","pending":"0","completed":"1"},{"text":625,"dotcolor":"#28912e","linecolor":"#28912e","current":"0","pending":"0","completed":"1"},{"text":3125,"dotcolor":"#28912e","linecolor":"#28912e","current":"0","pending":"0","completed":"1"},{"text":15625,"dotcolor":"#3498db","linecolor":"#3498db","current":"1","completed":"1","pending":"3125"},{"text":78125,"dotcolor":"#3498db","linecolor":"#3498db","current":0,"pending":"0","completed":0},{"text":390625,"dotcolor":"#3498db","linecolor":"#3498db","current":0,"pending":"0","completed":0}]" width="1360" height="380"></canvas>
</body>
JS：
<script
src="https://code.jquery.com/jquery-2.2.4.min.js"
integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
crossorigin="anonymous"></script>
<script type="text/javascript">
class levels{
constructor(){
var x = 0;
var y = 0;
var height = 0;
var width = 0;
var canvas = 0;
var fill = 0;
var start = 0;
var end = 0;
var lineWidth = 0;
var color = 0;
var gradient = 0;
var lineCap = "square";
var to = 0;
var data = 0;
var counter = 0;
var circleanimate = 0;
var percent=0;
var completed = 0;
var imagee = "";
}
config(){
}
line(){
// console.log(this.end);
this.canvas.beginPath();
this.canvas.moveTo(this.start, this.y);
this.canvas.lineTo(this.end, this.y);
this.canvas.lineWidth = this.lineWidth;
this.canvas.strokeStyle = this.color;
this.canvas.lineCap = this.lineCap
this.canvas.stroke();
};
circle(){
this.canvas.beginPath();
this.canvas.moveTo(this.end, this.y);
this.canvas.arc(this.end, this.y, this.radius, 0, 2 * Math.PI);
this.canvas.fillStyle = this.color;
this.canvas.fill();
this.canvas.closePath();
}
baloon(){
var bheight = (10 - lv.counter + lv.counter * 8 / 100 * canvas.height);
var totheight = canvas.height - (60 + bheight);
var height = totheight + 80 / 100 * bheight;
this.canvas.beginPath();
//console.log("check "+bheight+" "+totheight+" "+height);
var last = (lv.end-30) + (15 / 100 * bheight);
var y = lv.y-50;
this.canvas.moveTo(last + (12 / 100 * bheight), height - (13 / 100 * bheight));
this.canvas.bezierCurveTo(last - (16 / 100 * bheight), y, last - (16 / 100 * bheight), y, last - (16 / 100 * bheight), y);
this.canvas.bezierCurveTo(last - (36 / 100 * bheight), height, last - (36 / 100 * bheight), height, last - (36 / 100 * bheight), height);
this.canvas.arc(last - (18 / 100 * bheight), totheight + (38 / 100 * bheight), (last + (14 / 100 * bheight)) - (last - (28 / 100 * bheight)), 0.75 * Math.PI, 0.25 * Math.PI);
this.canvas.strokeStyle = lv.color;
this.canvas.lineWidth=3;
this.canvas.stroke();
// count++;
console.log(lv.imagee+" as");
if (this.imagee != "") {
var img = new Image();
img.src = this.imagee;
var newcanvas = this.canvas;
img.onload = function (e)
{
newcanvas.beginPath();
newcanvas.moveTo(last - (18 / 100 * bheight), totheight + (38 / 100 * bheight));
newcanvas.arc(last - (18 / 100 * bheight), totheight + (38 / 100 * bheight), (last + (14 / 100 * bheight)) - (last - (28 / 100 * bheight)) - 1, 0, 2 * Math.PI);
newcanvas.strokeStyle = "#fff";
newcanvas.stroke();
newcanvas.clip();
newcanvas.drawImage(img,last - (18 / 100 * bheight)-(1.5/100*canvas.width),totheight + (38 / 100 * bheight)-(1.5/100*canvas.width));
lv.canvas.beginPath();
// lv.image="";
}
}
}
}
function animateCircle() {
if(lv.circleanimate<2.1){
requestAnimationFrame(animateCircle);
lv.canvas.beginPath();
lv.canvas.moveTo(lv.end, lv.y);
lv.canvas.arc(lv.end, lv.y, lv.radius, (lv.circleanimate-0.1) * Math.PI, lv.circleanimate * Math.PI);
lv.canvas.fillStyle = lv.color;
lv.strokeStyle = "none";
lv.canvas.fill();
lv.canvas.closePath();
lv.circleanimate=lv.circleanimate+0.1;
}else{
lv.circleanimate=0;
if (lv.end == 0) {
lv.start = 0;
lv.end = 0;
lv.to = 30;
lv.color = lv.data[0].linecolor;
lv.style = "normal";
if(lv.data[0].hasOwnProperty("image")){
lv.imagee = lv.data[0].image;
}
} else {
lv.style = "bold";
lv.start = lv.end + 10;
var index = lv.counter-1;
if(lv.counter>=8){
index = 8;
}
console.log(index+" c ");
lv.imagee = "";
if(lv.data[index].hasOwnProperty("image")){
var w = 3/100*canvas.width;
lv.imagee = lv.data[index].image+"&w="+w+"&h="+w;
}
lv.color = lv.data[index].linecolor;
lv.percent = (Number(lv.data[index].pending) / Number(lv.data[index].text) * 100);
lv.completed = lv.data[index].completed;
lv.end = lv.start;
var p = (lv.counter * 2)+2;
lv.to = lv.to + ((p / 100) * workarea);
}
animateElipse();
animateLineFill();
}
}
function animateElipse(){
if(lv.circleanimate<2.1){
requestAnimationFrame(animateElipse);
var bheight = (10 - lv.counter + lv.counter * 8 / 100 * canvas.height);
var totheight = canvas.height - (60 + bheight);
var height = totheight + 80 / 100 * bheight;
var last = lv.end-25;
var y = lv.y-48;
lv.canvas.beginPath();
lv.canvas.moveTo(last, y);
lv.canvas.ellipse(last, y, 8, 2, 0,0, lv.circleanimate * Math.PI);
lv.canvas.fillStyle = "#e4e5e7";
lv.canvas.fill();
lv.circleanimate=lv.circleanimate+0.1;
}else{
lv.baloon();
}
}
function animateLineFill(){
if(lv.end<lv.to){
requestAnimationFrame(animateLineFill);
}else if(lv.counter<lv.count){
lv.circleanimate=0;
if (lv.end == 0) {
lv.start = 0;
lv.end = 0;
lv.to = 30;
lv.color = lv.data[0].linecolor;
lv.style = "normal";
} else {
lv.style = "bold";
lv.start = lv.end + 8;
var index = lv.counter;
if(lv.counter>=8){
index = 8;
}
lv.imagee = "";
if(lv.data[index].hasOwnProperty("image")){
var w = 3/100*canvas.width;
lv.imagee = lv.data[index].image+"&w="+w+"&h="+w;
}
lv.color = lv.data[index].linecolor;
lv.end = lv.start;
// var p = (lv.counter+1.9 * 5);
// lv.to = lv.to + ((p / 100) * workarea);
}
animateCircle();
lv.counter++;
}
lv.line();
lv.end++;
}
var lv = new levels();
var canvas = document.querySelector("canvas#levelchart");
/*canvas.width = (98 / 100) * $("div.team_link").width();
canvas.height = (28 / 100) * canvas.width;*/
canvas.width = (98 / 100) * $(window).width();
canvas.height = (28 / 100) * canvas.width;
var c = canvas.getContext('2d');
var workarea = (canvas.width);
var points = workarea / 10;
var start = canvas.width - 10;
var last = 0;
var y = canvas.height - 10;
var cheight = canvas.height;
var data = document.getElementById("levelchart").getAttribute("data-levels");
data = JSON.parse(data);
var i = 0;
var style = "normal";
lv.start = start;
lv.end = last;
lv.canvas = c;
lv.color="#000000";
lv.y = y;
lv.start = 50;
lv.end = workarea-50;
lv.lineWidth = 4;
lv.color = "#eee";
lv.lineCap = "round";
lv.line();
lv.end = 0;
lv.radius = 5;
lv.count = data.length;
lv.data = data;
lv.counter = 0;
if (lv.end == 0) {
lv.start = 0;
lv.end = 0;
lv.to = 30;
lv.color = lv.data[0].linecolor;
lv.style = "normal";
}
animateLineFill();
</script>
答案 0 :(得分：0)
在mixin comment()
div.comment-content
div.row
div.col-lg-1
a(href="#")
img(src="img/default_profile.jpg").comment-profile-img
div.col-lg-10
p.user-comment
| Comment //- <--- Here i would like to use the test object this way {#text}
div
textarea(name="post_content" placeholder="Comment something" rows="1").comment-textarea.post-comment-message
函数中，我们必须在画布上调用image.load，在.save()之后我们调用clip()函数，如下面的代码所定义。
.restore()