Raphael的Braille例子：
注意里面的split(' ')方法，竟然会split出来空元素；
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Title</title>
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<script type="text/javascript" src="js/raphael.js"></script>
<script type="text/javascript" src="js/index009.js"></script>
</head>
<body>
<input id='message' style='width:200px' value='Raphael is great' />
<input id='clickme' type='button' value='braille-ify' />
<div id="container"></div>
</body>
</html>
$(function() {
initRaphael();
});
function initRaphael(e) {
/**
* braille盲文
* 1 4
* 2 5
* 3 6
*/
var braille = {
'A' : '1',
'B' : '1-2',
'C' : '1-4',
'D' : '1-4-5',
'E' : '1-5',
'F' : '1-2-4',
'G' : '1-2-4-5',
'H' : '1-2-5',
'I' : '2-4',
'J' : '2-4-5',
'K' : '1-3',
'L' : '1-2-3',
'M' : '1-3-4',
'N' : '1-3-4-5',
'O' : '1-3-5',
'P' : '1-2-3-4',
'Q' : '1-2-3-4-5',
'R' : '1-2-3-5',
'S' : '2-3-4',
'T' : '2-3-4-5',
'U' : '1-3-6',
'V' : '1-2-3-6',
'W' : '2-4-5-6',
'X' : '1-3-4-6',
'Y' : '1-3-4-5-6',
'Z' : '1-3-5-6'
};
var paper = Raphael('container', 500, 500);
var SPACING = 14, RADIUS = 2;
// 根据数字进行布莱叶文字转换
function make_dot(number) {
number -= 1;
if (number < 0 || number > 5) {
console.log('Invalid number.');
return null;
}
var x = Math.floor(number / 3);
var y = number % 3;
var dot = paper.circle(x * SPACING, y * SPACING, RADIUS).attr('fill', 'black');
return dot;
}
// 根据数字字符串进行布莱叶转换
function make_cell(dots) {
if (typeof dots === 'string') {
dots = dots.split('-');
}
var cell = paper.set();
for (var c = 0; c < dots.length; c++) {
cell.push(make_dot(dots[c]));
}
return cell;
}
// paper.text(10, 25, "V:");
// make_cell('1-2-3-6').transform('T30,10');
// 根据一个单词进行布莱叶转换
function make_word(word, pos) {
pos = pos || {
x : 10,
y : 10
};
word = word.toUpperCase();
var myword = paper.set();
for (var c = 0; c < word.length; c++) {
// 如果在布莱叶对象中，就进行转换
if (braille[word[c]]) {
var letter = make_cell(braille[word[c]]);
myword.push(letter);
letter.transform('T' + pos.x + ',' + pos.y);
// 绘制一个就进行x坐标的增加
pos.x += SPACING * 3;
}
}
return myword;
}
// make_word('Raphael', {x:10,y:50});
function make_words(message) {
var pos = {
x : 10,
y : 10
};
// a b（中间有两个空格）会split出来的长度是4；空字符串split出来的内容的确会增加新的元素；
// 'a b'.split(' ') -> ["a", "", "", "b"]
// 'abcbd'.split('b') -> ["a", "c", "d"]
var words = message.toUpperCase().split(' ');
var myset = paper.set();
for (var c = 0; c < words.length; c++) {
myset.push(make_word(words[c], pos));
// 如果计算之后的x坐标大于paper.width，就换行；
if (pos.x > 10 && (pos.x + SPACING * 3 * words[c].length) > paper.width) {
pos.x = 10;
pos.y += SPACING * 5;
} else {
// 如果是空字符串也会增加一下x坐标；
pos.x += SPACING * 3;
}
}
return myset;
}
var braille_words = paper.set();
function make() {
// 进行已有集合的清空
braille_words.remove();
braille_words = make_words($('#message').val());
}
$('#clickme').click(make);
make();
}