1 | /*! |
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2 | * Ext JS Library 3.0.0 |
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3 | * Copyright(c) 2006-2009 Ext JS, LLC |
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4 | * licensing@extjs.com |
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5 | * http://www.extjs.com/license |
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6 | */ |
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7 | /** |
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8 | * @class Ext.ListView.ColumnResizer |
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9 | * @extends Ext.util.Observable |
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10 | * <p>Supporting Class for Ext.ListView.</p> |
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11 | * @constructor |
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12 | * @param {Object} config |
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13 | */ |
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14 | Ext.ListView.ColumnResizer = Ext.extend(Ext.util.Observable, { |
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15 | /** |
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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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17 | */ |
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18 | minPct: .05, |
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19 | |
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20 | constructor: function(config){ |
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21 | Ext.apply(this, config); |
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22 | Ext.ListView.ColumnResizer.superclass.constructor.call(this); |
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23 | }, |
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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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27 | }, |
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28 | |
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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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36 | tolerance: 3, |
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37 | autoStart: 300 |
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38 | }); |
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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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41 | }, |
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42 | |
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43 | handleHdMove : function(e, t){ |
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44 | var hw = 5; |
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45 | var x = e.getPageX(); |
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46 | var hd = e.getTarget('em', 3, true); |
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47 | if(hd){ |
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48 | var r = hd.getRegion(); |
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49 | var ss = hd.dom.style; |
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50 | var pn = hd.dom.parentNode; |
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51 | |
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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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56 | this.activeHd = hd; |
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57 | ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize'; |
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58 | } else{ |
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59 | delete this.activeHd; |
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60 | ss.cursor = ''; |
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61 | } |
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62 | } |
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63 | }, |
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64 | |
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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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68 | }, |
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69 | |
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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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74 | |
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75 | var x = this.tracker.getXY()[0]; |
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76 | var w = this.view.innerHd.getWidth(); |
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77 | |
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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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80 | |
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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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83 | |
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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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86 | }, |
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87 | |
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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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91 | }, |
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92 | |
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93 | onEnd: function(e){ |
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94 | var nw = this.proxy.getWidth(); |
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95 | this.proxy.remove(); |
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96 | |
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97 | var index = this.hdIndex; |
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98 | var vw = this.view, cs = vw.columns, len = cs.length; |
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99 | var w = this.view.innerHd.getWidth(), minPct = this.minPct * 100; |
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100 | |
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101 | var pct = Math.ceil((nw*100) / w); |
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102 | var diff = cs[index].width - pct; |
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103 | var each = Math.floor(diff / (len-1-index)); |
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104 | var mod = diff - (each * (len-1-index)); |
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105 | |
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106 | for(var i = index+1; i < len; i++){ |
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107 | var cw = cs[i].width + each; |
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108 | var ncw = Math.max(minPct, cw); |
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109 | if(cw != ncw){ |
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110 | mod += cw - ncw; |
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111 | } |
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112 | cs[i].width = ncw; |
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113 | } |
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114 | cs[index].width = pct; |
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115 | cs[index+1].width += mod; |
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116 | delete this.dragHd; |
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117 | this.view.setHdWidths(); |
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118 | this.view.refresh(); |
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119 | setTimeout(function(){ |
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120 | vw.disableHeaders = false; |
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121 | }, 100); |
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122 | } |
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123 | }); |
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