Home >Web Front-end >H5 Tutorial >Xiaoqiang's HTML5 mobile development journey (10) – Online drawing board
In this article we use HTML5 to implement an online drawing board. Friends who have played You Draw and I Guess can also play a simple You Draw and I Guess mini game today. The effect is as shown in the figure below:
The process is very simple and can be directly coded:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>大碗干拌的在线画板</title> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <style type="text/css"> #php100{ border:1px solid #ccc;} </style> </head> <body> <canvas id="php100" width="500" height="400"></canvas> <script type="text/javascript"> var canvas = document.getElementById('php100'); var p100=canvas.getContext("2d"); p100.lineWidth=5 p100.strokeStyle="red"; var paint=0; $("#php100").mousedown(function(e){ var mouseX = e.pageX - this.offsetLeft; var mouseY = e.pageY - this.offsetTop; paint=1; p100.moveTo(mouseX,mouseY); //起始位置 }); $("#php100").mouseup(function(e){ paint=0; }); $("#php100").mousemove(function(e){ var mouseX = e.pageX - this.offsetLeft; var mouseY = e.pageY - this.offsetTop; if(paint){ p100.lineTo(mouseX,mouseY); //终止位置 p100.stroke(); //结束图形 } }); </script> </body> </html>
Interested friends can extend it and add a few buttons to change the color of the drawing board or other fun functions.
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