SimpleLineSymbol - bug in createSwatch method

ChristophSchramm — Wed, 24 Oct 2012 07:38:12 GMT

Dear Flex team,

after migrating to API 3.0 I somehow can't help noticing that there seems to be a bug in the createSwatch method for the SimpleLineSymbol (in API 2.5 there was some different bug - the returned swatch had wrong size - but never mind that now...)

If the symbol is not set on a graphic that is displayed on a map, createSwatch() only works correctly if the style of the symbol is set to 'solid'. The use case for me is to display the symbology of a feature in a TOC or a search results list, so putting an actual graphic on a map somewhere first to get to the symbol swatch is right out.

A little app to illustrate the problem - change the style in the dropdown to see what I mean:

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:esri="http://www.esri.com/2008/ags"
xmlns:s="library://ns.adobe.com/flex/spark"
pageTitle="Play with Polyline symbols"
creationComplete="symbolChanged()">
<fx:Script>
<![CDATA[
   private function toHex(item:Number):String
   {
    var hex:String = item.toString(16);
    return ("00000" + hex.toUpperCase()).substr(-6);
   }

   private function symbolChanged():void {
    if(swatchGroup) {
     swatchGroup.removeAllElements();
     swatchGroup.addElement(mySymbol.createSwatch(80,10));
    }
   }
]]>
</fx:Script>

<fx:Declarations>
<esri:SimpleLineSymbol id="mySymbol"
   width="{lineWidth.value}"
   alpha="{lineAlpha.value}"
   color="{lineColor.selectedColor}"
   style="{lineStyle.selectedItem}"
   />
</fx:Declarations>

<mx:Panel left="50" top="50"
horizontalAlign="right"
paddingBottom="0"
paddingTop="0"
title="Simple Line Properties">
<mx:Form alpha="0.8"
   backgroundColor="0xEEEEEE"
   paddingBottom="5"
   paddingTop="5">
   <mx:FormItem label="Color">
    <mx:ColorPicker id="lineColor" selectedColor="0x009966" change="symbolChanged()"/>
   </mx:FormItem>
   <mx:FormItem label="Width:">
    <s:HSlider id="lineWidth"
     width="100"
     liveDragging="true"
     maximum="20"
     minimum="0"
     snapInterval="1"
     value="8"
     change="symbolChanged()"/>
   </mx:FormItem>
   <mx:FormItem label="Alpha:">
    <s:HSlider id="lineAlpha"
     width="100"
     liveDragging="true"
     maximum="1"
     minimum="0"
     snapInterval="0.01"
     value="1"
     change="symbolChanged()"/>
   </mx:FormItem>
   <mx:FormItem label="Style:">
    <s:DropDownList id="lineStyle"
     top="35"
     cornerRadius="0"
     fontWeight="normal"
     horizontalCenter="0"
     selectedIndex="4"
     change="symbolChanged()">
     <s:ArrayList>
      <fx:String>dash</fx:String>
      <fx:String>dashdot</fx:String>
      <fx:String>dashdotdot</fx:String>
      <fx:String>dot</fx:String>
      <fx:String>solid</fx:String>
     </s:ArrayList>
    </s:DropDownList>
   </mx:FormItem>
   <s:Spacer height="10"/>
   <mx:FormItem label="Swatch:">
    <s:HGroup id="swatchGroup" verticalAlign="middle"/>
   </mx:FormItem>
</mx:Form>
</mx:Panel>
</s:Application>

Thank you,
Chris

Re: SimpleLineSymbol - bug in reading documentation of used APIs

IvanBespalov — Wed, 24 Oct 2012 08:52:49 GMT

solved by reading the documentation

Re: SimpleLineSymbol - bug in createSwatch method

SarthakDatt — Wed, 24 Oct 2012 17:52:19 GMT

We are aware of this bug. It will be fixed in the next version.

Also, note that the height(thickness) of the line in the swatch will be limited to the height passed in createSwatch(). So in the example above it will never be > 10.

Re: SimpleLineSymbol - bug in createSwatch method

ChristophSchramm — Wed, 24 Oct 2012 20:12:30 GMT

Ivan,
thanks for looking, but the thread you linked to deals with a somewhat different problem.

Sarthak,
thanks for acknowledging that this is indeed a bug. Is it possible for you to disclose any planned release date for the next version?

Cheers,
Chris

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