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绘制效果
实现代码
JavaScript
var canvas = document.getElementById("mycanvas"); var w = window.innerWidth; var h = window.innerHeight; canvas.height = 1000; canvas.width = 1400; var ctx = canvas.getContext('2d'); var poppable = true; var slices = []; function shadeColor(color, percent) { var f = parseInt(color.slice(1), 16), t = percent < 0 "#" + (0x1000000 + (Math.round((t - R) * p) + R) * 0x10000 + (Math.round((t - G) * p) + G) * 0x100 + (Math.round((t - B) * p) + B)).toString(16).slice(1); } function pieSlice(oX, oY, r, pos, len, col,data) { this.data = data this.originX = oX; this.originY = oY; this.radius = r; this.startingRadian = pos; this.length = len; this.color = col; this.highlightedColor = shadeColor(this.color, .6); this.highlighted = false; this.popped = false; this.animationFrame = 0; function setColor(c) { this.color = c; } } pieSlice.prototype.displayData = function(){ ctx.fillStyle= this.color; ctx.fillRect(this.originX - this.radius - 40, this.originY-this.radius-35, 25,25); ctx.fillStyle= "white"; ctx.font = "15px Arial"; ctx.fillText(this.data, this.originX - this.radius - 10, this.originY - this.radius - 18); } pieSlice.prototype.render = function() { if (!this.highlighted) { ctx.fillStyle = this.color; ctx.strokeStyle = this.color; } else { if(!this.popped && poppable){ this.displayData(); } // ctx.fillStyle = this.color; ctx.fillStyle = this.highlightedColor; ctx.strokeStyle = this.color; } ctx.beginPath(); var xOffset = Math.cos(this.length / 2 + this.startingRadian) * this.animationFrame; var yOffset = Math.sin(this.length / 2 + this.startingRadian) * this.animationFrame; ctx.moveTo(this.originX + xOffset, this.originY + yOffset); var x = this.originX + xOffset + this.radius * Math.cos(this.startingRadian); var y = this.originY + yOffset + this.radius * Math.sin(this.startingRadian); ctx.lineTo(x, y); ctx.arc(this.originX + xOffset, this.originY + yOffset, this.radius, this.startingRadian, this.startingRadian + this.length); if (this.popped) { var fill = ctx.fillStyle; this.displayData(); ctx.fillStyle = fill; if (this.animationFrame < 30) { this.animationFrame += 2; } } else { if (this.animationFrame > 0) { this.animationFrame -= 2; } } ctx.closePath(); //ctx.stroke(); //if (this.highlighted) { ctx.fill(); // } } pieSlice.prototype.update = function() { } function pieChart(s) { this.slices = s; } pieChart.prototype.render = function() { this.slices.forEach(function(p) { p.render(); }); }; pieChart.prototype.update = function() { this.slices.forEach(function(p) { p.update(); }); } //PIE ONE var pie = new pieSlice(700, 170, 125, 0, Math.PI / 4, "#FFD1DC", 12); var slice2 = new pieSlice(700, 170, 125, Math.PI / 4, Math.PI / 4, "#08E8DE"); var slice3 = new pieSlice(700, 170, 125, Math.PI / 2, Math.PI / 4, "#6699CC"); var slice4 = new pieSlice(700, 170, 125, 3 * Math.PI / 4, Math.PI, "#ADD8E6"); var slice5 = new pieSlice(700, 170, 125, 7 * Math.PI / 4, Math.PI / 4, "#B19CD9"); var slices1 = [pie, slice2, slice3, slice4, slice5]; var pink = new pieSlice(220, 170, 125, 0, Math.PI / 3, "#FF4B4B"); var orange = new pieSlice(220, 170, 125, Math.PI / 3, Math.PI / 3, "#FF931B"); var yellow = new pieSlice(220, 170, 125, 2 * Math.PI / 3, Math.PI / 3, "#FFE21B"); var green = new pieSlice(220, 170, 125, 3 * Math.PI / 3, Math.PI / 3, "#90E64E"); var blue = new pieSlice(220, 170, 125, 4 * Math.PI / 3, Math.PI / 3, "#6097D9"); var purple = new pieSlice(220, 170, 125, 5 * Math.PI / 3, Math.PI / 3, "#8365DD"); var redd = new pieSlice(1180, 170, 125, 0, 2 * Math.PI / 3, "#B3989B"); var orangee = new pieSlice(1180, 170, 125, 2 * Math.PI / 3, 1 * Math.PI / 8, "#C1AEE0"); var bluee = new pieSlice(1180, 170, 125, 19 * Math.PI / 24, 4 * Math.PI / 24, "#928CE9"); var greenn = new pieSlice(1180, 170, 125, 23 * Math.PI/24, 3* Math.PI/8, "#676675"); var purplee = new pieSlice(1180, 170, 125, 4 * Math.PI/3, 3* Math.PI/8, "#947D59"); var ceci = new pieSlice(1180, 170, 125, 41 * Math.PI/24, 7*Math.PI/24, "#D994E0"); var slices3 = [redd, orangee, bluee, greenn, purplee, ceci]; var slices2 = [pink, orange, yellow, green, blue, purple]; var pie1 = new pieChart(slices1); var pie2 = new pieChart(slices2); var pie3 = new pieChart(slices3); var update = function() { pie1.update(); } var render = function() { ctx.clearRect(0, 0, canvas.width, canvas.height); pie1.render(); pie2.render(); pie3.render(); } var step = function() { update(); render(); animate(step); } var animate = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(callback) { window.setTimeout(callback, 1000 / 60); }; slices.push.apply(slices, slices1); slices.push.apply(slices, slices2); slices.push.apply(slices, slices3); canvas.addEventListener("mousemove", function(e) { var x = e.clientX; var y = e.clientY; slices.forEach(function(slice) { ctx.beginPath(); var xOffset = Math.cos(slice.length / 2 + slice.startingRadian) * slice.animationFrame; var yOffset = Math.sin(slice.length / 2 + slice.startingRadian) * slice.animationFrame; ctx.moveTo(slice.originX + xOffset, slice.originY + yOffset); var xx = slice.originX + xOffset + slice.radius * Math.cos(slice.startingRadian); var yy = slice.originY + yOffset + slice.radius * Math.sin(slice.startingRadian); ctx.lineTo(xx, yy); ctx.arc(slice.originX + xOffset, slice.originY + yOffset, slice.radius, slice.startingRadian, slice.startingRadian + slice.length); if (ctx.isPointInPath(x, y)) { slice.highlighted = true; slice.displayData(); } else { slice.highlighted = false; } ctx.closePath(); }); }); canvas.addEventListener("click", function(e) { var x = e.clientX; var y = e.clientY; slices.forEach(function(slice) { ctx.beginPath(); var xOffset = Math.cos(slice.length / 2 + slice.startingRadian) * slice.animationFrame; var yOffset = Math.sin(slice.length / 2 + slice.startingRadian) * slice.animationFrame; ctx.moveTo(slice.originX + xOffset, slice.originY + yOffset); var xx = slice.originX + xOffset + slice.radius * Math.cos(slice.startingRadian); var yy = slice.originY + yOffset + slice.radius * Math.sin(slice.startingRadian); ctx.lineTo(xx, yy); ctx.arc(slice.originX + xOffset, slice.originY + yOffset, slice.radius, slice.startingRadian, slice.startingRadian + slice.length); if (ctx.isPointInPath(x, y)) { if (slice.popped) { slice.popped = false; poppable = true; } else { if(poppable){ slice.popped = true; poppable = false; } } slice.highlighted = false; } ctx.closePath(); }); }); //start the loop animate(step);
html
<canvas id="mycanvas"></canvas>
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暂无JavaScript 绘制饼图的示例的评论...
稳了!魔兽国服回归的3条重磅消息!官宣时间再确认!
昨天有一位朋友在大神群里分享,自己亚服账号被封号之后居然弹出了国服的封号信息对话框。
这里面让他访问的是一个国服的战网网址,com.cn和后面的zh都非常明白地表明这就是国服战网。
而他在复制这个网址并且进行登录之后,确实是网易的网址,也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情,因为以前都没有出现这样的情况,现在突然提示跳转到国服战网的网址,是不是说明了简体中文客户端已经开始进行更新了呢?