人生有起有落,有起有伏,无论你现在是在人生的顶峰,还是在人生的低谷,都是人生必经的一个过程。站在山峰的你,回头看看曾经在山谷的你,是多么的发奋图强,自强不息。所有的好事不是不来,而是在等红绿灯的路上。
XML/HTML Code复制内容到剪贴板
- <html>
- <canvasid="a_canvas"width="1000"height="700"></canvas>
- <script>
- (function(){
- window.addEventListener("load",function(){
- vardata=[1000,1300,2000,3000,2000,2000,1000,1500,2000,5000,1000,1000];
- varxinforma=['1月','2月','3月','4月','5月','6月','7月','8月','9月','10月','11月','12月'];
- //获取上下文
- vara_canvas=document.getElementById('a_canvas');
- varcontext=a_canvas.getContext("2d");
- //绘制背景
- vargradient=context.createLinearGradient(0,0,0,300);
- //gradient.addColorStop(0,"#e0e0e0");
- //gradient.addColorStop(1,"#ffffff");
- context.fillStyle=gradient;
- context.fillRect(0,0,a_canvas.width,a_canvas.height);
- varrealheight=a_canvas.height-15;
- varrealwidth=a_canvas.width-40;
- //描绘边框
- vargrid_cols=data.length+1;
- vargrid_rows=4;
- varcell_height=realheight/grid_rows;
- varcell_width=realwidth/grid_cols;
- context.lineWidth=1;
- context.strokeStyle="#a0a0a0";
- //结束边框描绘
- context.beginPath();
- //准备画横线
- /*for(varrow=1;row<=grid_rows;row++){
- vary=row*cell_height;
- context.moveTo(0,y);
- context.lineTo(a_canvas.width,y);
- }*/
- //划横线
- context.moveTo(0,realheight);
- context.lineTo(realwidth,realheight);
- //画竖线
- context.moveTo(0,20);
- context.lineTo(0,realheight);
- context.lineWidth=1;
- context.strokeStyle="black";
- context.stroke();
- varmax_v=0;
- for(vari=0;i<data.length;i++){
- if(data[i]>max_v){max_v=data[i]};
- }
- max_vmax_v=max_v*1.1;
- //将数据换算为坐标
- varpoints=[];
- for(vari=0;i<data.length;i++){
- varv=data[i];
- varpx=cell_width* (i+1);
- varpy=realheight-realheight*(v/max_v);
- //alert(py);
- points.push({"x":px,"y":py});
- }
- //绘制坐标图形
- for(variinpoints){
- varp=points[i];
- context.beginPath();
- context.fillStyle="green";
- context.fillRect(p.x,p.y,15,realheight-p.y);
- context.fill();
- }
- //添加文字
- for(variinpoints)
- {varp=points[i];
- context.beginPath();
- context.fillStyle="black";
- context.fillText(data[i],p.x+1,p.y-15);
- context.fillText(xinforma[i],p.x+1,realheight+12);
- context.fillText('月份',realwidth,realheight+12);
- context.fillText('资金量',0,10);
- }
- },false);
- })();
- </script>
- </html>
html5生成柱状图(条形图)详细代码
运行结果:
以上这篇html5生成柱状图(条形图)效果的实例代码就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。
原文地址:http://www.cnblogs.com/shuniuniu/p/5318666.html