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Using complex controls in flex4 skins?

Hi,
 
I am currently evaluating tools for integration testing of Flex applications. Currently I am working with Ranorex and am pretty sattisfied with it ... except that I was having some problems with a spark DropDownList that I use for selecting the language in my main applications skin. The Ranorex support claimed that I shouldn't use "complex controls" such as a DropDownList in a Spark Skin and that a Skin should be treated as nothing else than a complex CSS File.
 
Well this statement stands in extreme contrast to the way I understood the skinning in flex4. I allways thought the Idea is to define Components in Code (ActionScript ... or MXML) leaving away the design-considerations and to define a skin that places, layouts, formats the controls a component needs. The Component is ideally developed by a Software-Developer and the Skin can be entirely provided by the Designer. This way everybody can work in that domain of expertise that he is best in.
 
I thought in the component implementation I define SkinParts. These tell the Designer which controls I need and he defines them accordingly in his skin. By giving the control in the skin the same id as the variable-name in the component implementation the Flex framework sets the instance of the control in the component and then calls the partAdded function to tell the component that the control is now available ... well at least this is the way I understood this.
 
I hope that I understood this correctly and that simply the tool-creators are on the wrong track. If not, I would be really glad to know how I should introduce a DropDownList in my applications skin without actually using a DropDownList.
 
Chris
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ChristoferDutz
Asked:
ChristoferDutz
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PankajRaiCommented:
Yes,  You are right, Skinning in flex 4 is more complex than complex css file.  But you can use CSS in Flex 4 also in efficient way.

for more detail you can go to link:
http://www.adobe.com/devnet/flex/videotraining.html#day5
and see these: Styling the visual display  videos For CSS

and Skinning Flex applications with Adobe Flash Catalyst videos for Skinning.
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PankajRaiCommented:
The main advantage of skinning is to support FXG format.
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ChristoferDutzAuthor Commented:
Hi PankajRai,

I have done quite a lot of work with Flex4 and Skins "the way I understood it" and was really looking for confirmation that I am using it correctly. Thanks for that. Just a Tool manufacturer that told me I was writing my code wrong made me suspicios ... Using is as a CSS++ sort of sounded like a total under-usage of the whole concept. If this was not the way you do it, I think I still would have ;-)

Chris
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PankajRaiCommented:
Hi ChristoferDutz,

I think, you are using it correctly.
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