3 * Copyright(c) 2006-2009 Ext JS, LLC
5 * http://www.extjs.com/license
8 * @class Ext.list.ColumnResizer
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9 * @extends Ext.util.Observable
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10 * <p>Supporting Class for Ext.list.ListView</p>
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12 * @param {Object} config
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14 Ext.list.ColumnResizer = Ext.extend(Ext.util.Observable, {
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16 * @cfg {Number} minPct The minimum percentage to allot for any column (defaults to <tt>.05</tt>)
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20 constructor: function(config){
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21 Ext.apply(this, config);
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22 Ext.list.ColumnResizer.superclass.constructor.call(this);
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24 init : function(listView){
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25 this.view = listView;
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26 listView.on('render', this.initEvents, this);
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29 initEvents : function(view){
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30 view.mon(view.innerHd, 'mousemove', this.handleHdMove, this);
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31 this.tracker = new Ext.dd.DragTracker({
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32 onBeforeStart: this.onBeforeStart.createDelegate(this),
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33 onStart: this.onStart.createDelegate(this),
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34 onDrag: this.onDrag.createDelegate(this),
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35 onEnd: this.onEnd.createDelegate(this),
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39 this.tracker.initEl(view.innerHd);
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40 view.on('beforedestroy', this.tracker.destroy, this.tracker);
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43 handleHdMove : function(e, t){
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46 hd = e.getTarget('em', 3, true);
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48 var r = hd.getRegion(),
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50 pn = hd.dom.parentNode;
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52 if(x - r.left <= hw && pn != pn.parentNode.firstChild){
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53 this.activeHd = Ext.get(pn.previousSibling.firstChild);
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54 ss.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize';
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55 } else if(r.right - x <= hw && pn != pn.parentNode.lastChild.previousSibling){
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57 ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize';
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59 delete this.activeHd;
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65 onBeforeStart : function(e){
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66 this.dragHd = this.activeHd;
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67 return !!this.dragHd;
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70 onStart: function(e){
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71 this.view.disableHeaders = true;
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72 this.proxy = this.view.el.createChild({cls:'x-list-resizer'});
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73 this.proxy.setHeight(this.view.el.getHeight());
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75 var x = this.tracker.getXY()[0],
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76 w = this.view.innerHd.getWidth();
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78 this.hdX = this.dragHd.getX();
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79 this.hdIndex = this.view.findHeaderIndex(this.dragHd);
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81 this.proxy.setX(this.hdX);
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82 this.proxy.setWidth(x-this.hdX);
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84 this.minWidth = w*this.minPct;
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85 this.maxWidth = w - (this.minWidth*(this.view.columns.length-1-this.hdIndex));
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88 onDrag: function(e){
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89 var cursorX = this.tracker.getXY()[0];
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90 this.proxy.setWidth((cursorX-this.hdX).constrain(this.minWidth, this.maxWidth));
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94 /* calculate desired width by measuring proxy and then remove it */
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95 var nw = this.proxy.getWidth();
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96 this.proxy.remove();
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98 var index = this.hdIndex,
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102 w = this.view.innerHd.getWidth(),
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103 minPct = this.minPct * 100,
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104 pct = Math.ceil((nw * vw.maxWidth) / w),
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105 diff = (cs[index].width * 100) - pct,
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106 each = Math.floor(diff / (len-1-index)),
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107 mod = diff - (each * (len-1-index));
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109 for(var i = index+1; i < len; i++){
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110 var cw = (cs[i].width * 100) + each,
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111 ncw = Math.max(minPct, cw);
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115 cs[i].width = ncw / 100;
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117 cs[index].width = pct / 100;
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118 cs[index+1].width += (mod / 100);
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119 delete this.dragHd;
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122 setTimeout(function(){
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123 vw.disableHeaders = false;
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128 // Backwards compatibility alias
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129 Ext.ListView.ColumnResizer = Ext.list.ColumnResizer;