你的位置:首页 > 网页设计

[网页设计]html5 canvas文本处理


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html ="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>html5 canvas文本处理</title><script src="js/modernizr.js"></script></head><body><script type="text/javascript">window.addEventListener('load',eventWindowLoaded,false);function eventWindowLoaded(){  canvasApp();}function canvasSupport(){  return Modernizr.canvas;}function canvasApp(){  if(!canvasSupport()){    return;  }else{    var theCanvas = document.getElementById('canvas')    var context = theCanvas.getContext("2d")  }  var message="your text"  function drawScreen(){    context.font = '50px serif';    context.fillStyle = '#ff0000';    context.fillText(message,100,80);   }   var formElement = document.getElementById("textbox")
//绑定textbox输入框 formElement.addEventListener('keyup',textBoxChanged,false);

//然后通过addEventListener()方法设置keyup事件,然后处理textBoxChanged函数 function textBoxChanged(e){ var target = e.target; message=target.value; drawScreen(); } }</script><canvas id="canvas" width="500" height="500">你的浏览器无法使用canvas小白童鞋;你的支持是我最大的快乐!!</canvas><form>Text:<input id="textbox" placeholder="your text" /><br /></form></body></html>