/*!
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* Ext JS Library 3.1.0
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* Copyright(c) 2006-2009 Ext JS, LLC
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* licensing@extjs.com
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* http://www.extjs.com/license
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*/
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/**
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* @class Ext.list.ColumnResizer
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* @extends Ext.util.Observable
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* <p>Supporting Class for Ext.list.ListView</p>
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* @constructor
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* @param {Object} config
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*/
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Ext.list.ColumnResizer = Ext.extend(Ext.util.Observable, {
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/**
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* @cfg {Number} minPct The minimum percentage to allot for any column (defaults to <tt>.05</tt>)
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*/
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minPct: .05,
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constructor: function(config){
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Ext.apply(this, config);
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Ext.list.ColumnResizer.superclass.constructor.call(this);
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},
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init : function(listView){
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this.view = listView;
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listView.on('render', this.initEvents, this);
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},
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initEvents : function(view){
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view.mon(view.innerHd, 'mousemove', this.handleHdMove, this);
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this.tracker = new Ext.dd.DragTracker({
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onBeforeStart: this.onBeforeStart.createDelegate(this),
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onStart: this.onStart.createDelegate(this),
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onDrag: this.onDrag.createDelegate(this),
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onEnd: this.onEnd.createDelegate(this),
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tolerance: 3,
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autoStart: 300
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});
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this.tracker.initEl(view.innerHd);
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view.on('beforedestroy', this.tracker.destroy, this.tracker);
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},
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handleHdMove : function(e, t){
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var hw = 5,
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x = e.getPageX(),
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hd = e.getTarget('em', 3, true);
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if(hd){
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var r = hd.getRegion(),
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ss = hd.dom.style,
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pn = hd.dom.parentNode;
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if(x - r.left <= hw && pn != pn.parentNode.firstChild){
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this.activeHd = Ext.get(pn.previousSibling.firstChild);
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ss.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize';
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} else if(r.right - x <= hw && pn != pn.parentNode.lastChild.previousSibling){
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this.activeHd = hd;
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ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize';
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} else{
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delete this.activeHd;
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ss.cursor = '';
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}
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}
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},
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onBeforeStart : function(e){
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this.dragHd = this.activeHd;
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return !!this.dragHd;
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},
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onStart: function(e){
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this.view.disableHeaders = true;
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this.proxy = this.view.el.createChild({cls:'x-list-resizer'});
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this.proxy.setHeight(this.view.el.getHeight());
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var x = this.tracker.getXY()[0],
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w = this.view.innerHd.getWidth();
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this.hdX = this.dragHd.getX();
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this.hdIndex = this.view.findHeaderIndex(this.dragHd);
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this.proxy.setX(this.hdX);
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this.proxy.setWidth(x-this.hdX);
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this.minWidth = w*this.minPct;
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this.maxWidth = w - (this.minWidth*(this.view.columns.length-1-this.hdIndex));
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},
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onDrag: function(e){
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var cursorX = this.tracker.getXY()[0];
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this.proxy.setWidth((cursorX-this.hdX).constrain(this.minWidth, this.maxWidth));
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},
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onEnd: function(e){
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/* calculate desired width by measuring proxy and then remove it */
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var nw = this.proxy.getWidth();
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this.proxy.remove();
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var index = this.hdIndex,
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vw = this.view,
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cs = vw.columns,
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len = cs.length,
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w = this.view.innerHd.getWidth(),
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minPct = this.minPct * 100,
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pct = Math.ceil((nw * vw.maxWidth) / w),
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diff = (cs[index].width * 100) - pct,
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each = Math.floor(diff / (len-1-index)),
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mod = diff - (each * (len-1-index));
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for(var i = index+1; i < len; i++){
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var cw = (cs[i].width * 100) + each,
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ncw = Math.max(minPct, cw);
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if(cw != ncw){
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mod += cw - ncw;
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}
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cs[i].width = ncw / 100;
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}
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cs[index].width = pct / 100;
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cs[index+1].width += (mod / 100);
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delete this.dragHd;
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vw.setHdWidths();
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vw.refresh();
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setTimeout(function(){
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vw.disableHeaders = false;
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}, 100);
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}
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});
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// Backwards compatibility alias
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Ext.ListView.ColumnResizer = Ext.list.ColumnResizer;
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