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<head>
<title>The source code</title>
<link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.0.3
* Copyright(c) 2006-2009 Ext JS, LLC
* licensing@extjs.com
* http://www.extjs.com/license
*/
<div id="cls-Ext.ListView.ColumnResizer"></div>/**
* @class Ext.ListView.ColumnResizer
* @extends Ext.util.Observable
* <p>Supporting Class for Ext.ListView.</p>
* @constructor
* @param {Object} config
*/
Ext.ListView.ColumnResizer = Ext.extend(Ext.util.Observable, {
<div id="cfg-Ext.ListView.ColumnResizer-minPct"></div>/**
* @cfg {Number} minPct The minimum percentage to allot for any column (defaults to <tt>.05</tt>)
*/
minPct: .05,
constructor: function(config){
Ext.apply(this, config);
Ext.ListView.ColumnResizer.superclass.constructor.call(this);
},
init : function(listView){
this.view = listView;
listView.on('render', this.initEvents, this);
},
initEvents : function(view){
view.mon(view.innerHd, 'mousemove', this.handleHdMove, this);
this.tracker = new Ext.dd.DragTracker({
onBeforeStart: this.onBeforeStart.createDelegate(this),
onStart: this.onStart.createDelegate(this),
onDrag: this.onDrag.createDelegate(this),
onEnd: this.onEnd.createDelegate(this),
tolerance: 3,
autoStart: 300
});
this.tracker.initEl(view.innerHd);
view.on('beforedestroy', this.tracker.destroy, this.tracker);
},
handleHdMove : function(e, t){
var hw = 5,
x = e.getPageX(),
hd = e.getTarget('em', 3, true);
if(hd){
var r = hd.getRegion(),
ss = hd.dom.style,
pn = hd.dom.parentNode;
if(x - r.left <= hw && pn != pn.parentNode.firstChild){
this.activeHd = Ext.get(pn.previousSibling.firstChild);
ss.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize';
} else if(r.right - x <= hw && pn != pn.parentNode.lastChild.previousSibling){
this.activeHd = hd;
ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize';
} else{
delete this.activeHd;
ss.cursor = '';
}
}
},
onBeforeStart : function(e){
this.dragHd = this.activeHd;
return !!this.dragHd;
},
onStart: function(e){
this.view.disableHeaders = true;
this.proxy = this.view.el.createChild({cls:'x-list-resizer'});
this.proxy.setHeight(this.view.el.getHeight());
var x = this.tracker.getXY()[0],
w = this.view.innerHd.getWidth();
this.hdX = this.dragHd.getX();
this.hdIndex = this.view.findHeaderIndex(this.dragHd);
this.proxy.setX(this.hdX);
this.proxy.setWidth(x-this.hdX);
this.minWidth = w*this.minPct;
this.maxWidth = w - (this.minWidth*(this.view.columns.length-1-this.hdIndex));
},
onDrag: function(e){
var cursorX = this.tracker.getXY()[0];
this.proxy.setWidth((cursorX-this.hdX).constrain(this.minWidth, this.maxWidth));
},
onEnd: function(e){
var nw = this.proxy.getWidth();
this.proxy.remove();
var index = this.hdIndex,
vw = this.view,
cs = vw.columns,
len = cs.length,
w = this.view.innerHd.getWidth(),
minPct = this.minPct * 100;
pct = Math.ceil((nw * vw.maxWidth) / w),
diff = cs[index].width - pct,
each = Math.floor(diff / (len-1-index)),
mod = diff - (each * (len-1-index));
for(var i = index+1; i < len; i++){
var cw = cs[i].width + each,
ncw = Math.max(minPct, cw);
if(cw != ncw){
mod += cw - ncw;
}
cs[i].width = ncw;
}
cs[index].width = pct;
cs[index+1].width += mod;
delete this.dragHd;
vw.setHdWidths();
vw.refresh();
setTimeout(function(){
vw.disableHeaders = false;
}, 100);
}
});</pre>
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