BLOGS

4D FOR FLEX

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Another first for 4D

4D for Flex is the first commercially available component to offer a direct connection between a Flex application and a SQL database.
4D for Flex development
Flex developers can now take advantage of

The new frontier

4D has proven time and again a reliable and enduring platform for standalone software.

 

Then, with the advent of client/server computing, 4D successfully tackled that arena, using the unique premise that your existing application and code could easily and seamlessly be adapted for the client/server world.

 

Beyond PC vs. Mac

4D’s cross-platform compatibility and consistency is legendary. But now, there's more than just two main platforms. Each browser, each smartphone, and each rich internet technology is a new platform. What they have in common are standards – and 4D is glad to support them.

 

Out of the box

4D has a built-in Web server. It has a built-in Web services server. And more features to help you get your application online right away, accessing your data directly from the Web.  

 

 

 

 

Web features included with 4D

I'm having a conflict with 4D for Flex and Adobe AIR

“I tried to create an AIR project using 4D for Flex but there seems to be a conflict. It looks like some of 4D for Flex's classes conflict with AIR's own SQL classes. SQLConnect is one of them.”


1) The approach of using what we call the Flash layer is not supported as it is explained in the manual.

 

2) If you still want to use this API, you can fully qualify this function as a workaround:

 

Where's the French localization file in 4D for Flex?

“Any beginner Flex user with a fresh FB3 install wil not have a fr_fr locale and will not be able to compile/run the demos.”

 

Adobe does not provide the "fr_FR" locale (only English & Japanese locales are provided by default).  You will have to create your own locale by using the "copylocale" tool provided by Adobe.

 

Using the "Adobe Flex 3 SDK Command prompt", just type: copylocale en_US fr_FR

How do I resolve a security alert in 4D for Flex?

You may receive the following error:

 

Error #2048
Security sandbox violation
http://localhost8080/SpendingsUI.swf cannot load data from localhost1919

This is due to a change in the Adobe Flash Player Security Model starting from version 9.0.124. See:

http://www.adobe.com/support/security/bulletins/apsb08-11.html
 

To fix this issue, you will need to use 4D Server v11 SQL Release 2.

 

How big is 4D for Flex?

• The 4D for Flex component (Flex4D_SQL.swc) is 524k by itself.

• The Flex4D+Controls.swc (DataGrid…) weighs in at 716k.

• A demo like Spending (including both components) is 388k.

Is there any utility tool for debugging communications in 4D for Flex?

There is no utility like an HTTP sniffer, as 4D for Flex uses binary sockets.


But you've got:

• a SQL Server side log – See the provided examples for how to activate it.

• an AIR component for tracing communication between Flex and 4D

What user interface controls does 4D for Flex provide?

4D for Flex currently offers:

 

• custom DataGrid inheriting from Flex DataGrid

• some navigation controls (like automatic first-next-last...)

 

But you can also use Flex UI Controls like the Adavanced DataGrid, available in Flex 3 Builder Pro: http://livedocs.adobe.com/flex/3/html/help.html?content=dpcontrols_6.html