docs/source/ColumnResizer.html

   1 <html>\r
   2 <head>\r
   3   <title>The source code</title>\r
   4     <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />\r
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   7 <body  onload="prettyPrint();">\r
   8     <pre class="prettyprint lang-js"><div id="cls-Ext.ListView.ColumnResizer"></div>/**\r
   9  * @class Ext.ListView.ColumnResizer\r
  10  * @extends Ext.util.Observable\r
  11  * <p>Supporting Class for Ext.ListView.</p>\r
  12  * @constructor\r
  13  * @param {Object} config\r
  14  */\r
  15 Ext.ListView.ColumnResizer = Ext.extend(Ext.util.Observable, {\r
  16     <div id="cfg-Ext.ListView.ColumnResizer-minPct"></div>/**\r
  17      * @cfg {Number} minPct The minimum percentage to allot for any column (defaults to <tt>.05</tt>)\r
  18      */\r
  19     minPct: .05,\r
  20 \r
  21     constructor: function(config){\r
  22         Ext.apply(this, config);\r
  23         Ext.ListView.ColumnResizer.superclass.constructor.call(this);\r
  24     },\r
  25     init : function(listView){\r
  26         this.view = listView;\r
  27         listView.on('render', this.initEvents, this);\r
  28     },\r
  29 \r
  30     initEvents : function(view){\r
  31         view.mon(view.innerHd, 'mousemove', this.handleHdMove, this);\r
  32         this.tracker = new Ext.dd.DragTracker({\r
  33             onBeforeStart: this.onBeforeStart.createDelegate(this),\r
  34             onStart: this.onStart.createDelegate(this),\r
  35             onDrag: this.onDrag.createDelegate(this),\r
  36             onEnd: this.onEnd.createDelegate(this),\r
  37             tolerance: 3,\r
  38             autoStart: 300\r
  39         });\r
  40         this.tracker.initEl(view.innerHd);\r
  41         view.on('beforedestroy', this.tracker.destroy, this.tracker);\r
  42     },\r
  43 \r
  44     handleHdMove : function(e, t){\r
  45         var hw = 5;\r
  46         var x = e.getPageX();\r
  47         var hd = e.getTarget('em', 3, true);\r
  48         if(hd){\r
  49             var r = hd.getRegion();\r
  50             var ss = hd.dom.style;\r
  51             var pn = hd.dom.parentNode;\r
  52 \r
  53             if(x - r.left <= hw && pn != pn.parentNode.firstChild){\r
  54                 this.activeHd = Ext.get(pn.previousSibling.firstChild);\r
  55                                 ss.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize';\r
  56             } else if(r.right - x <= hw && pn != pn.parentNode.lastChild.previousSibling){\r
  57                 this.activeHd = hd;\r
  58                                 ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize';\r
  59             } else{\r
  60                 delete this.activeHd;\r
  61                 ss.cursor = '';\r
  62             }\r
  63         }\r
  64     },\r
  65 \r
  66     onBeforeStart : function(e){\r
  67         this.dragHd = this.activeHd;\r
  68         return !!this.dragHd;\r
  69     },\r
  70 \r
  71     onStart: function(e){\r
  72         this.view.disableHeaders = true;\r
  73         this.proxy = this.view.el.createChild({cls:'x-list-resizer'});\r
  74         this.proxy.setHeight(this.view.el.getHeight());\r
  75 \r
  76         var x = this.tracker.getXY()[0];\r
  77         var w = this.view.innerHd.getWidth();\r
  78 \r
  79         this.hdX = this.dragHd.getX();\r
  80         this.hdIndex = this.view.findHeaderIndex(this.dragHd);\r
  81 \r
  82         this.proxy.setX(this.hdX);\r
  83         this.proxy.setWidth(x-this.hdX);\r
  84 \r
  85         this.minWidth = w*this.minPct;\r
  86         this.maxWidth = w - (this.minWidth*(this.view.columns.length-1-this.hdIndex));\r
  87     },\r
  88 \r
  89     onDrag: function(e){\r
  90         var cursorX = this.tracker.getXY()[0];\r
  91         this.proxy.setWidth((cursorX-this.hdX).constrain(this.minWidth, this.maxWidth));\r
  92     },\r
  93 \r
  94     onEnd: function(e){\r
  95         var nw = this.proxy.getWidth();\r
  96         this.proxy.remove();\r
  97 \r
  98         var index = this.hdIndex;\r
  99         var vw = this.view, cs = vw.columns, len = cs.length;\r
 100         var w = this.view.innerHd.getWidth(), minPct = this.minPct * 100;\r
 101 \r
 102         var pct = Math.ceil((nw*100) / w);\r
 103         var diff = cs[index].width - pct;\r
 104         var each = Math.floor(diff / (len-1-index));\r
 105         var mod = diff - (each * (len-1-index));\r
 106 \r
 107         for(var i = index+1; i < len; i++){\r
 108             var cw = cs[i].width + each;\r
 109             var ncw = Math.max(minPct, cw);\r
 110             if(cw != ncw){\r
 111                 mod += cw - ncw;\r
 112             }\r
 113             cs[i].width = ncw;\r
 114         }\r
 115         cs[index].width = pct;\r
 116         cs[index+1].width += mod;\r
 117         delete this.dragHd;\r
 118         this.view.setHdWidths();\r
 119         this.view.refresh();\r
 120         setTimeout(function(){\r
 121             vw.disableHeaders = false;\r
 122         }, 100);\r
 123     }\r
 124 });</pre>    \r
 125 </body>\r
 126 </html>