net/systemeD/potlatch2/mapfeatures/editors/ChoiceComboBox.as

   1 package net.systemeD.potlatch2.mapfeatures.editors {
   2
   3     import mx.controls.*;
   4     import mx.containers.*;
   5     import mx.core.*;
   6     import flash.display.*;
   7     import flash.events.*;
   8     import mx.events.*;
   9     import mx.utils.*;
  10
  11         public class ChoiceComboBox extends ComboBox {
  12
  13         protected var textInputReplacement:UIComponent;
  14
  15         override protected function createChildren():void {
  16                 super.createChildren();
  17
  18                 if ( !textInputReplacement ) {
  19                         if ( itemRenderer != null ) {
  20                                 //remove the default textInput
  21                                 removeChild(textInput);
  22
  23                                 //create a new itemRenderer to use in place of the text input
  24                                 textInputReplacement = itemRenderer.newInstance();
  25                                 IDataRenderer(textInputReplacement).data = selectedItem;
  26                                 textInputReplacement.mouseChildren = false;
  27                                 textInputReplacement.mouseEnabled = false;
  28                                 addChild(textInputReplacement);
  29                         }
  30                 }
  31         }
  32
  33         override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void {
  34             super.updateDisplayList(unscaledWidth, unscaledHeight);
  35
  36             if ( textInputReplacement ) {
  37                 IDataRenderer(textInputReplacement).data = selectedItem;
  38
  39                 var arrowWidth:Number = getStyle("arrowButtonWidth");\r
  40                 var itemHeight:Number = textInputReplacement.getExplicitOrMeasuredHeight();\r
  41                 var itemWidth:Number = textInputReplacement.getExplicitOrMeasuredWidth();\r
  42 \r
  43                 if (isNaN(arrowWidth))\r
  44                     arrowWidth = 0;\r
  45
  46                 var bm:EdgeMetrics = borderMetrics;
  47
  48                 textInputReplacement.setActualSize(unscaledWidth - arrowWidth, itemHeight);\r
  49                 textInputReplacement.move(bm.left, bm.top);
  50             }
  51         }
  52
  53         override protected function measure():void {
  54             super.measure();
  55
  56             if ( textInputReplacement ) {
  57                 IDataRenderer(textInputReplacement).data = selectedItem;
  58                 var prefSize:Object = calculatePreferredSizeFromData(collection.length);
  59
  60                 var arrowWidth:Number = getStyle("arrowButtonWidth");\r
  61                 var itemHeight:Number = textInputReplacement.getExplicitOrMeasuredHeight();\r
  62                 var itemWidth:Number = textInputReplacement.getExplicitOrMeasuredWidth();\r
  63 \r
  64                 if (isNaN(arrowWidth))\r
  65                     arrowWidth = 0;\r
  66
  67                 var bm:EdgeMetrics = borderMetrics;
  68                 itemHeight += bm.top + bm.bottom;\r
  69                 itemWidth += bm.left + bm.right + arrowWidth + 8;
  70                 prefSize.height += bm.top + bm.bottom;
  71                 prefSize.width += bm.left + bm.right + arrowWidth + 8;\r
  72
  73                 measuredMinHeight = measuredHeight = Math.max(prefSize.height, itemHeight);\r
  74                 measuredMinWidth = measuredWidth = Math.max(prefSize.width, itemWidth);\r
  75             }
  76         }
  77
  78         override protected function calculatePreferredSizeFromData(numItems:int):Object {
  79             if ( collection == null ) return { width: 0, height: 0 };
  80
  81             var maxWidth:Number = 0;
  82             var maxHeight:Number = 0;
  83
  84             var test:UIComponent = itemRenderer.newInstance();
  85             addChild(test)
  86             for ( var i:int = 0; i < numItems; i++ ) {
  87                 IDataRenderer(test).data = collection[i];
  88                 test.validateDisplayList();
  89                 test.validateSize(true);
  90                 maxWidth = Math.max(maxWidth, test.getExplicitOrMeasuredWidth());\r
  91                 maxHeight = Math.max(maxHeight, test.getExplicitOrMeasuredHeight());\r
  92             }
  93             removeChild(test);
  94             return {width: maxWidth, height: maxHeight};
  95         }
  96     }
  97 }
  98
  99