[jira] [Created] (FLEX-34017) DataGroup#drawBackground called before valid content size available

[Maxim Jurat (JIRA)]

Maxim Jurat created FLEX-34017:
----------------------------------

             Summary: DataGroup#drawBackground called before valid content size 
available
                 Key: FLEX-34017
                 URL: https://issues.apache.org/jira/browse/FLEX-34017
             Project: Apache Flex
          Issue Type: Bug
          Components: Spark: DataGroup
    Affects Versions: Apache Flex 4.11.0
            Reporter: Maxim Jurat


DataGroup call drawBackground before layout setup valid content size. This 
cause wrong mouseEnabledWhereTransparent behaviour when scrolling.
Compile this:
<?xml version="1.0"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"; 
xmlns:s="library://ns.adobe.com/flex/spark" xmlns:local="*">

    <s:DataGroup x="5" y="5" width="100" height="100" 
mouseEnabledWhereTransparent="true"
        mouseWheel="trace(event)" id="dataGroup"
        itemRenderer="spark.skins.spark.DefaultItemRenderer">
        <s:layout>
            <s:VerticalLayout clipAndEnableScrolling="true"/>
        </s:layout>
        <s:dataProvider>
            <s:ArrayList>
                <fx:String>1</fx:String>
                <fx:String>2</fx:String>
                <fx:String>3</fx:String>
                <fx:String>4</fx:String>
                <fx:String>5</fx:String>
                <fx:String>6</fx:String>
                <fx:String>7</fx:String>
                <fx:String>8</fx:String>
                <fx:String>9</fx:String>
                <fx:String>0</fx:String>
                <fx:String>10</fx:String>
                <fx:String>11</fx:String>
                <fx:String>12</fx:String>
                <fx:String>13</fx:String>
                <fx:String>14</fx:String>
                <fx:String>15</fx:String>
                <fx:String>16</fx:String>
                <fx:String>17</fx:String>
                <fx:String>18</fx:String>
                <fx:String>19</fx:String>
                <fx:String>20</fx:String>
                <fx:String>21</fx:String>
                <fx:String>22</fx:String>
                <fx:String>23</fx:String>
                <fx:String>24</fx:String>
            </s:ArrayList>
        </s:dataProvider>
    </s:DataGroup>

    <s:VScrollBar viewport="{dataGroup}" x="105" y="5" height="100"/>

</s:Application>

Move mouse on dataGroup (on empty space) and scroll with mouse wheel. Traces 
appear. Then scroll dataGroup to bottom and repeat scrolling with mouse wheel. 
There are no new traces, but they should be.



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