jQuery實現的拖動調整表格td單元格的大小

antzone發表於2017-03-28
jQuery

在實際應用中，可能有這樣的需求，那就是需要調整td單元格的大小。

也許是為了便於觀察，也許是其他原因，反正這樣的需求是有的，下面就分享一段能夠實現此功能的程式碼。

程式碼例項如下:

[HTML] 純文字檢視 複製程式碼
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>螞蟻部落</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);
      //設定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();
      //設定臨時變數存放物件
      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;">年紀</td>
      <td style="width:200px;">地址</td>
      <td style="width:200px;">電話</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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