标签:style http java color os 数据
一,对比
1,html5中
首先看看在html5的canvas中的文字显示
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.font = "40pt Calibri";
context.fillStyle = "#0000ff";
context.fillText("文字测试!", 50, 150);
在html中输入框就不用说了,需要用到input标签
<input type="text" id="myTextbox" />
2,在as中
//文字显示
var txt:TextField = new TextField();
txt.text = "文字测试!";
txt.x = 50;
txt.y = 50;
addChild(txt);
//输入框
var txt:TextField = new TextField();
txt.type = TextFieldType.INPUT;
txt.x = 50;
txt.y = 50;
addChild(txt);
二,编写js类库后的代码
//文字显示
var txt = new LTextField();
txt.x = 100;
txt.text = "TextField 测试";
addChild(txt);
//输入框
var txt1 = new LTextField();
txt1.x = 100;
txt1.y = 50;
txt1.setType(LTextFieldType.INPUT);
addChild(txt1);
三,实现方法
文字显示非常简单,只需要建立一个LTextField类和一个show方法就可以了
function LTextField(){
var self = this;
self.objectindex = ++LGlobal.objectIndex;
self.type = "LTextField";
self.texttype = null;
self.x = 0;
self.y = 0;
self.text = "";
self.font = "utf-8";
self.size = "11";
self.color = "#000000";
self.textAlign = "left";
self.textBaseline = "middle";
self.lineWidth = 1;
self.stroke = false;
self.visible=true;
}
LTextField.prototype = {
show:function (cood){
if(cood==null)cood={x:0,y:0};
var self = this;
if(!self.visible)return;
LGlobal.canvas.font = self.size+"pt "+self.font;
LGlobal.canvas.textAlign = self.textAlign;
LGlobal.canvas.textBaseline = self.textBaseline;
LGlobal.canvas.lineWidth = self.lineWidth;
if(self.stroke){
LGlobal.canvas.strokeStyle = self.color;
LGlobal.canvas.strokeText(self.text,parseFloat(cood.x) + parseFloat(self.x),
parseFloat(cood.y) + parseFloat(self.y) + parseFloat(self.size));
}else{
LGlobal.canvas.fillStyle = self.color;
LGlobal.canvas.fillText(self.text,parseFloat(cood.x) + parseFloat(self.x),
parseFloat(cood.y) + parseFloat(self.y) + parseFloat(self.size));
}
}
}
代码不难理解,就是调用show方法的时候,把它画在canvas上面而已,
关键是输入框,因为html中,输入框是一个标签,怎么把这个标签画到canvas上?或者说canvas可以直接现实输入框?
这个我不太清楚,如果有高手知道的话,希望能告诉偶一声,
我现在说一说我的做法,我是在textField是input的时候,先画一个矩形方框,然后利用div,把textbox直接显示在相应的位置上
我的html里一开始只有下面代码
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>仿ActionScript测试-TextField</title>
<script type="text/javascript" src="../legend/legend.js"></script>
<script type="text/javascript" src="./js/Main.js"></script>
</head>
<body>
<div id="mylegend">页面读取中……</div>
</body>
</html>
然后,利用javascript写入一个canvas和一个textbox,作为准备工作
LGlobal.object = document.getElementById(id);
LGlobal.object.innerHTML=‘<div id="‘ + LGlobal.id + ‘_inittxt" style="position:absolute;margin:0px 0px 0px 0px;width:‘+width+‘px;height:‘+height+‘px;">数据读取中……</div>‘ +
‘<div style="position:absolute;margin:0px 0px 0px 0px;z-index:0;"><canvas id="‘ + LGlobal.id + ‘_canvas">您的浏览器不支持[color=#444444 !important]HTML5</canvas></div>‘+
‘<div id="‘ + LGlobal.id + ‘_InputText" style="position:absolute;margin:0px 0px 0px 0px;z-index:10;display:none;"><input type="text" id="‘ + LGlobal.id + ‘_InputTextBox" /></div>‘;
LGlobal.canvasObj = document.getElementById(LGlobal.id+"_canvas");
LGlobal.inputBox = document.getElementById(LGlobal.id + ‘_InputText‘);
LGlobal.inputTextBox = document.getElementById(LGlobal.id + ‘_InputTextBox‘);
LGlobal.inputTextField = null;
一开始将textbox隐藏,然后的做法是,当点击我画的矩形方框的时候,将它显示到矩形方框上面,然后当点击其他地方的时候,把输入的内容赋值给textField后隐藏textbox
具体做法不多说了,下面是完整的LTextField代码,或者你一会儿可以直接鼠标右健看完整代码
详细说明:http://html5.662p.com/thread-30-1-1.html
AS语法来写HTML5,TextField与输入框,布布扣,bubuko.com
标签:style http java color os 数据
原文地址:http://www.cnblogs.com/lianweikj02/p/3857762.html