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jQuery实现拖动调整表格单元格大小的代码实例

时间:2015-02-08 19:23来源:www.chengxuyuans.com 点击:

jQuery实现的拖动调整表格td单元格的大小:

在实际应用中,可能有这样的需求,那就是需要调整td单元格的大小。
也许是为了便于观察,也许是其他原因,反正这样的需求是有的,下面就分享一段能够实现此功能的代码。

代码实例如下:


<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<title>程序员之家</title>
<style type="text/css" >
table {
  border-collapse: collapse;
}
td {
  text-align: center;
}
</style>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script type="text/javascript">
(function ($){
  $.fn.tableresize = function () {
    var _document = $("body");
    $(this).each(function () {
      if (!$.tableresize) {
        $.tableresize = {};
      }
      var _table = $(this);
      //设定ID
      var id = _table.attr("id") || "tableresize_" + (Math.random() * 100000).toFixed(0).toString();
      var tr = _table.find("tr").first(), ths = tr.children(), _firstth = ths.first();
      //设定临时变量存放对象
      var cobjs = $.tableresize[id] = {};
      cobjs._currentObj = null, cobjs._currentLeft = null;
      ths.mousemove(function (e) {
        var _this = $(this);
        var left = _this.offset().left,
            top = _this.offset().top,
            width = _this.width(),
            height = _this.height(),
            right = left + width,
            bottom = top + height,
            clientX = e.clientX,
            clientY = e.clientY;
        var leftside = !_firstth.is(_this) && Math.abs(left - clientX) <= 5,
            rightside = Math.abs(right - clientX) <= 5;
        if (cobjs._currentLeft||clientY>top&&clientY<bottom&&(leftside||rightside)){
          _document.css("cursor", "e-resize");
          if (!cobjs._currentLeft) {
            if (leftside) {
              cobjs._currentObj = _this.prev();
            }
            else {
              cobjs._currentObj = _this;
            }
          }
        }
        else {
          cobjs._currentObj = null;
        }
      });
      ths.mouseout(function (e) {
        if (!cobjs._currentLeft) {
          cobjs._currentObj = null;
          _document.css("cursor", "auto");
        }
      });
      _document.mousedown(function (e) {
        if (cobjs._currentObj) {
          cobjs._currentLeft = e.clientX;
        }
        else {
          cobjs._currentLeft = null;
        }
      });
      _document.mouseup(function (e) {
        if (cobjs._currentLeft) {
          cobjs._currentObj.width(cobjs._currentObj.width() + (e.clientX - cobjs._currentLeft));
        }
        cobjs._currentObj = null;
        cobjs._currentLeft = null;
        _document.css("cursor", "auto");
      });
    });
  };
})(jQuery);
  
$(document).ready(function () {
  $("table").tableresize();
});
</script>
</head>
<body>
<table cellspacing="0" border="1" rules="all">
  <tbody>
    <tr>
      <td style="width:200px;">ID</td>
      <td style="width:200px;">名字</td>
      <td style="width:200px;">年纪</td>
      <td style="width:200px;">地址</td>
      <td style="width:200px;">电话</td>
    </tr>
    <tr>
      <td>22</td>
      <td>Name:44</td>
      <td>Age:23</td>
      <td>Address:47</td>
      <td>Phone:15</td>
    </tr>
    <tr>
      <td>28</td>
      <td>Name:42</td>
      <td>Age:68</td>
      <td>Address:30</td>
      <td>Phone:50</td>
    </tr>
    <tr>
      <td>29</td>
      <td>Name:63</td>
      <td>Age:48</td>
      <td>Address:90</td>
      <td>Phone:76</td>
    </tr>
  </tbody>
</table>
</body>
</html>

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