1 | /*! |
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2 | * Ext JS Library 3.4.0 |
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3 | * Copyright(c) 2006-2011 Sencha Inc. |
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4 | * licensing@sencha.com |
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5 | * http://www.sencha.com/license |
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6 | */ |
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7 | /** |
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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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11 | * @constructor |
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12 | * @param {Object} config |
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13 | */ |
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14 | Ext.list.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.list.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 handleWidth = 5, |
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45 | x = e.getPageX(), |
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46 | header = e.getTarget('em', 3, true); |
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47 | if(header){ |
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48 | var region = header.getRegion(), |
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49 | style = header.dom.style, |
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50 | parentNode = header.dom.parentNode; |
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51 | |
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52 | if(x - region.left <= handleWidth && parentNode != parentNode.parentNode.firstChild){ |
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53 | this.activeHd = Ext.get(parentNode.previousSibling.firstChild); |
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54 | style.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize'; |
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55 | } else if(region.right - x <= handleWidth && parentNode != parentNode.parentNode.lastChild.previousSibling){ |
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56 | this.activeHd = header; |
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57 | style.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 | style.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 | |
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72 | var me = this, |
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73 | view = me.view, |
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74 | dragHeader = me.dragHd, |
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75 | x = me.tracker.getXY()[0]; |
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76 | |
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77 | me.proxy = view.el.createChild({cls:'x-list-resizer'}); |
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78 | me.dragX = dragHeader.getX(); |
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79 | me.headerIndex = view.findHeaderIndex(dragHeader); |
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80 | |
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81 | me.headersDisabled = view.disableHeaders; |
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82 | view.disableHeaders = true; |
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83 | |
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84 | me.proxy.setHeight(view.el.getHeight()); |
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85 | me.proxy.setX(me.dragX); |
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86 | me.proxy.setWidth(x - me.dragX); |
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87 | |
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88 | this.setBoundaries(); |
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89 | |
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90 | }, |
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91 | |
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92 | // Sets up the boundaries for the drag/drop operation |
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93 | setBoundaries: function(relativeX){ |
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94 | var view = this.view, |
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95 | headerIndex = this.headerIndex, |
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96 | width = view.innerHd.getWidth(), |
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97 | relativeX = view.innerHd.getX(), |
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98 | minWidth = Math.ceil(width * this.minPct), |
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99 | maxWidth = width - minWidth, |
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100 | numColumns = view.columns.length, |
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101 | headers = view.innerHd.select('em', true), |
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102 | minX = minWidth + relativeX, |
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103 | maxX = maxWidth + relativeX, |
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104 | header; |
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105 | |
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106 | if (numColumns == 2) { |
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107 | this.minX = minX; |
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108 | this.maxX = maxX; |
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109 | }else{ |
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110 | header = headers.item(headerIndex + 2); |
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111 | this.minX = headers.item(headerIndex).getX() + minWidth; |
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112 | this.maxX = header ? header.getX() - minWidth : maxX; |
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113 | if (headerIndex == 0) { |
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114 | // First |
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115 | this.minX = minX; |
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116 | } else if (headerIndex == numColumns - 2) { |
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117 | // Last |
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118 | this.maxX = maxX; |
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119 | } |
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120 | } |
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121 | }, |
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122 | |
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123 | onDrag: function(e){ |
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124 | var me = this, |
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125 | cursorX = me.tracker.getXY()[0].constrain(me.minX, me.maxX); |
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126 | |
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127 | me.proxy.setWidth(cursorX - this.dragX); |
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128 | }, |
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129 | |
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130 | onEnd: function(e){ |
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131 | /* calculate desired width by measuring proxy and then remove it */ |
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132 | var newWidth = this.proxy.getWidth(), |
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133 | index = this.headerIndex, |
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134 | view = this.view, |
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135 | columns = view.columns, |
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136 | width = view.innerHd.getWidth(), |
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137 | newPercent = Math.ceil(newWidth * view.maxColumnWidth / width) / 100, |
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138 | disabled = this.headersDisabled, |
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139 | headerCol = columns[index], |
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140 | otherCol = columns[index + 1], |
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141 | totalPercent = headerCol.width + otherCol.width; |
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142 | |
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143 | this.proxy.remove(); |
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144 | |
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145 | headerCol.width = newPercent; |
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146 | otherCol.width = totalPercent - newPercent; |
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147 | |
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148 | delete this.dragHd; |
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149 | view.setHdWidths(); |
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150 | view.refresh(); |
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151 | |
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152 | setTimeout(function(){ |
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153 | view.disableHeaders = disabled; |
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154 | }, 100); |
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155 | } |
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156 | }); |
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157 | |
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158 | // Backwards compatibility alias |
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159 | Ext.ListView.ColumnResizer = Ext.list.ColumnResizer; |
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