; (function ($) {
/*
* 文本域光标操作（选、添、删、取）的jQuery扩展 @Mr.Think http://mrthink.net/text-field-jquery-extend/
*/
$.fn.extend({
/*
* 获取光标所在位置
*/
iGetFieldPos: function () {
var field = this.get(0);
if (document.selection) {
//IE
$(this).focus();
var sel = document.selection;
var range = sel.createRange();
var dupRange = range.duplicate();
dupRange.moveToElementText(field);
dupRange.setEndPoint(‘EndToEnd‘, range);
field.selectionStart = dupRange.text.length - range.text.length;
field.selectionEnd = field.selectionStart + range.text.length;
}
return field.selectionStart;
},
/*
* 选中指定位置内字符 || 设置光标位置
* --- 从start起选中(含第start个)，到第end结束（不含第end个）
* --- 若不输入end值，即为设置光标的位置（第start字符后）
*/
iSelectField: function (start, end) {
var field = this.get(0);
//end未定义，则为设置光标位置
if (arguments[1] == undefined) {
end = start;
}
if (document.selection) {
//IE
var range = field.createTextRange();
range.moveEnd(‘character‘, -$(this).val().length);
range.moveEnd(‘character‘, end);
range.moveStart(‘character‘, start);
range.select();
} else {
//非IE
field.setSelectionRange(start, end);
$(this).focus();
}
},
/*
* 选中指定字符串
*/
iSelectStr: function (str) {
var field = this.get(0);
var i = $(this).val().indexOf(str);
i != -1 ? $(this).iSelectField(i, i + str.length) : false;
},
/*
* 在光标之后插入字符串
*/
iAddField: function (str) {
var field = this.get(0);
var v = $(this).val();
var len = $(this).val().length;
if (document.selection) {
//IE
$(this).focus()
document.selection.createRange().text = str;
} else {
//非IE
var selPos = field.selectionStart;
$(this).val($(this).val().slice(0, field.selectionStart) + str + $(this).val().slice(field.selectionStart, len));
this.iSelectField(selPos + str.length);
};
},
/*
* 删除光标前面(-)或者后面(+)的n个字符
*/
iDelField: function (n) {
var field = this.get(0);
var pos = $(this).iGetFieldPos();
var v = $(this).val();
//大于0则删除后面，小于0则删除前面
$(this).val(n > 0 ? v.slice(0, pos - n) + v.slice(pos) : v.slice(0, pos) + v.slice(pos - n));
$(this).iSelectField(pos - (n < 0 ? 0 : n));
}
});
})(jQuery);
应用场景
<!DOCTYPE html>
<html>
<head>
<title>无标题页</title>
<script type="text/javascript" src="http://sy.zgsapt.com/js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
; (function ($) {
/*
* 文本域光标操作（选、添、删、取）的jQuery扩展 @Mr.Think http://mrthink.net/text-field-jquery-extend/
*/
$.fn.extend({
/*
* 获取光标所在位置
*/
iGetFieldPos: function () {
var field = this.get(0);
if (document.selection) {
//IE
$(this).focus();
var sel = document.selection;
var range = sel.createRange();
var dupRange = range.duplicate();
dupRange.moveToElementText(field);
dupRange.setEndPoint(‘EndToEnd‘, range);
field.selectionStart = dupRange.text.length - range.text.length;
field.selectionEnd = field.selectionStart + range.text.length;
}
return field.selectionStart;
},
/*
* 选中指定位置内字符 || 设置光标位置
* --- 从start起选中(含第start个)，到第end结束（不含第end个）
* --- 若不输入end值，即为设置光标的位置（第start字符后）
*/
iSelectField: function (start, end) {
var field = this.get(0);
//end未定义，则为设置光标位置
if (arguments[1] == undefined) {
end = start;
}
if (document.selection) {
//IE
var range = field.createTextRange();
range.moveEnd(‘character‘, -$(this).val().length);
range.moveEnd(‘character‘, end);
range.moveStart(‘character‘, start);
range.select();
} else {
//非IE
field.setSelectionRange(start, end);
$(this).focus();
}
},
/*
* 选中指定字符串
*/
iSelectStr: function (str) {
var field = this.get(0);
var i = $(this).val().indexOf(str);
i != -1 ? $(this).iSelectField(i, i + str.length) : false;
},
/*
* 在光标之后插入字符串
*/
iAddField: function (str) {
var field = this.get(0);
var v = $(this).val();
var len = $(this).val().length;
if (document.selection) {
//IE
$(this).focus()
document.selection.createRange().text = str;
} else {
//非IE
var selPos = field.selectionStart;
$(this).val($(this).val().slice(0, field.selectionStart) + str + $(this).val().slice(field.selectionStart, len));
this.iSelectField(selPos + str.length);
};
},
/*
* 删除光标前面(-)或者后面(+)的n个字符
*/
iDelField: function (n) {
var field = this.get(0);
var pos = $(this).iGetFieldPos();
var v = $(this).val();
//大于0则删除后面，小于0则删除前面
$(this).val(n > 0 ? v.slice(0, pos - n) + v.slice(pos) : v.slice(0, pos) + v.slice(pos - n));
$(this).iSelectField(pos - (n < 0 ? 0 : n));
}
});
})(jQuery);
$(document).ready(function () {
$("#numd").bind("mouseleave", function () {
document.getElementById(‘keybored‘).style.display = ‘none‘;
document.getElementById(‘Nm‘).blur();
});
$("#Nm").focus(function () {
document.getElementById(‘keybored‘).style.display = ‘‘;
});
$(".readbtns").click(function () {
$("#Nm").iAddField($(this).val());
});
$(".returns").click(function () {
$("#Nm").iDelField(1);
});
});
</script>
</head>
<body>
<ul>
<li>
<input />
<div>
</div>
</li>
</ul>
<input id="hid" type="text" value="" style="display: none" />
<span id="numd" style="border: 1px solid red; clear: both; display: inline-block; font: 800em;">
<input type="text" id="Nm" name="Nm" value="" />
<div style="display: none; border: 1px solid #A2B4C6; width: 150px; height: 400px;"
id="keybored">
<input type="button" class="readbtns" value="1" />
<input type="button" class="readbtns" value="2" />
<input type="button" class="readbtns" value="3" />
<input type="button" class="readbtns" value="4" />
<input type="button" class="readbtns" value="5" />
<input type="button" class="readbtns" value="6" />
<input type="button" class="readbtns" value="7" />
<input type="button" class="readbtns" value="8" />
<input type="button" class="readbtns" value="9" />
<input type="button" class="returns" value="<<---" />
</div>
</span>
</body>
</html>
经过查阅jQuery的hover
$(‘#hover_div‘).hover(function()
{
/* something to do on mouseenter */
},
function()
{
/* something to do on mouseleave */
});
所以上面的bind("mouseleave")完全可以用hover函数
$("#numd").hover(function () {
document.getElementById(‘keybored‘).style.display = ‘‘;
}, function () {
document.getElementById(‘keybored‘).style.display = ‘none‘;
document.getElementById(‘Nm‘).blur();
});
文本域光标操作（选、添、删、取）的jQuery扩展
时间： 2024-10-25 12:28:37