1 | package gov.va.med.edp.widget
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2 | {
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3 | import flash.display.DisplayObject;
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4 | import mx.events.FlexEvent;
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5 | import mx.core.UIComponent;
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6 | import mx.controls.listClasses.BaseListData;
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7 | import mx.controls.listClasses.IListItemRenderer;
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8 | import mx.controls.listClasses.IDropInListItemRenderer;
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9 |
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10 | /**
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11 | * assumes the image is embedded and not a .swf
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12 | */
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13 | public class CenteredEmbedImage extends UIComponent implements IListItemRenderer, IDropInListItemRenderer
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14 | {
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15 |
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16 | public function CenteredEmbedImage()
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17 | {
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18 | super();
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19 | }
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20 |
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21 | //----------------------------------
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22 | // data
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23 | //----------------------------------
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24 |
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25 | /**
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26 | * @private
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27 | * Storage for the data property.
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28 | */
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29 | private var _data:Object;
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30 |
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31 | [Bindable("dataChange")]
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32 | [Inspectable(environment="none")]
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33 |
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34 | /**
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35 | * Lets you pass a value to the component
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36 | * when you use it in an item renderer or item editor.
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37 | * You typically use data binding to bind a field of the <code>data</code>
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38 | * property to a property of this component.
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39 | *
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40 | * <p>When you use the control as a drop-in item renderer or drop-in
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41 | * item editor, Flex automatically writes the current value of the item
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42 | * to the <code>text</code> property of this control.</p>
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43 | *
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44 | * <p>You do not set this property in MXML.</p>
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45 | *
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46 | * @default null
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47 | * @see mx.core.IDataRenderer
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48 | */
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49 | public function get data():Object
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50 | {
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51 | return _data;
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52 | }
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53 |
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54 | /**
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55 | * @private
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56 | */
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57 | public function set data(value:Object):void
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58 | {
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59 | var newText:*;
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60 |
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61 | _data = value;
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62 |
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63 | invalidateProperties();
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64 |
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65 | dispatchEvent(new FlexEvent(FlexEvent.DATA_CHANGE));
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66 | }
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67 |
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68 | //----------------------------------
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69 | // listData
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70 | //----------------------------------
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71 |
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72 | /**
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73 | * @private
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74 | * Storage for the listData property.
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75 | */
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76 | private var _listData:BaseListData;
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77 |
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78 | [Bindable("dataChange")]
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79 | [Inspectable(environment="none")]
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80 |
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81 | /**
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82 | * When a component is used as a drop-in item renderer or drop-in
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83 | * item editor, Flex initializes the <code>listData</code> property
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84 | * of the component with the appropriate data from the List control.
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85 | * The component can then use the <code>listData</code> property
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86 | * to initialize the <code>data</code> property of the drop-in
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87 | * item renderer or drop-in item editor.
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88 | *
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89 | * <p>You do not set this property in MXML or ActionScript;
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90 | * Flex sets it when the component is used as a drop-in item renderer
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91 | * or drop-in item editor.</p>
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92 | *
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93 | * @default null
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94 | * @see mx.controls.listClasses.IDropInListItemRenderer
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95 | */
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96 | public function get listData():BaseListData
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97 | {
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98 | return _listData;
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99 | }
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100 |
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101 | /**
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102 | * @private
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103 | */
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104 | public function set listData(value:BaseListData):void
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105 | {
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106 | _listData = value;
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107 | }
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108 |
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109 | private var img:DisplayObject;
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110 |
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111 | /**
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112 | * create the image instance now that we know what it is
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113 | */
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114 | override protected function commitProperties():void
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115 | {
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116 | super.commitProperties();
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117 |
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118 | if (listData)
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119 | {
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120 | // remove the old child if we have one
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121 | if (img)
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122 | removeChild(img);
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123 |
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124 | var c:Class = UIComponent(owner).document[listData.label];
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125 | img = new c();
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126 | addChild(img);
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127 | }
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128 | }
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129 |
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130 | /**
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131 | * create the image instance now that we know what it is
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132 | */
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133 | override protected function measure():void
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134 | {
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135 | super.measure();
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136 |
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137 | if (img)
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138 | {
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139 | measuredHeight = img.height;
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140 | measuredWidth = img.width;
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141 | }
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142 | }
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143 |
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144 | /**
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145 | * center the contentHolder
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146 | */
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147 | override protected function updateDisplayList(w:Number, h:Number):void
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148 | {
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149 | super.updateDisplayList(w, h);
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150 |
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151 | if (img)
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152 | {
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153 | img.x = (w - img.width) / 2;
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154 | }
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155 | }
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156 |
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157 | }
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158 |
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159 | }
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