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4D Ajax Framework - FAQ

How is the 4D Ajax Framework different from other frameworks?

The 4D Ajax Framework is a multi-layered framework with deep integration into the 4D environment. It has been designed to complement the existing 4D developer environment. Ajax frameworks that are not system-specific do not have the same level of integration. They work well for basic functions but are less useful for in-depth 4D application development or integration. For example, 4D Ajax Framework recognizes and can use an existing 4D security user / group structure. Other frameworks don't.

I have a large, complex 4D structure and I don't want to add any new tables or forms to it. What will the 4D Ajax Framework do to my structure?

Nothing. You need to add one component to the application, but the rest of your data structure doesn't need to be touched.

Is a web application built with 4D Ajax Framework meant to replace 4D Client?

Not at all. We're introducing the 4D Ajax Framework to give you more choices, not less. Using a web browser as a 4D client is mean to be an additional option to go alongside of using the existing 4D Client.

Why shouldn't I use a free Ajax framework like Dojo or YUI?

There's no reason you can't. However, there are some things that 4DAF does that those other frameworks simply do not offer. For example, we've focused 4D Ajax Framework on providing powerful query handling and data organizing, such as our data tree and calendar controls.

I love the 4D Ajax Framework, but my corporate client is tied to another database. Can I use this framework to build a web front-end to a back-end DB other than 4D?

The 4D Ajax Framework has been optimized for use with 4D. You could use another database on the back end if 4D acts as a middleware layer, but it was not designed for direct connection to another data source.

Will the apps I create with 4D Ajax Framework run only on 4D Server, or can I use 4D Runtime Single User?

4D web applications can run on either, as long as you have a copy of 4D Web Server in place.

Can I develop 4D web applications without the 4D Ajax Framework?

Yes, of course! We think that once you've tried the tools the 4D Ajax Framework has to offer, you'll love them so much that you won't want to do web development without them, but they are not required in order to develop rich Internet applications with 4D.

4D Web 2.0 Pack is licensed per-developer and is hassle-free for deployment. So which version of the product do I need to buy if I develop on a standalone 4D Developer Edition, but deploy to customers on 4D Server?

4D Web 2.0 Pack is a development tool, so you should buy the version of 4D Web 2.0 Pack that will work with the product you develop with. "Hassle-free" deployment means that you don't have to worry about which version of 4D your customers are using.

I need to buy a 12-month renewal of 4D Web 2.0 Pack before my current subscription expires. What happens if I don't?

If you decide to not continue your subscription, you will still have full access to the version of the software you currently have and it will continue to function. However, you won't have access to any bug fixes, new features, or new parts of the product that we release after your subscription expires.

If you stop subscribing and then decide to resume a subscription after your current one has expired, you can ëcatch-up' by calling your 4D account representative or 4D Customer Service.

How do registered users upgrade to v1.1 of the 4D Web 2.0 Pack?

There are three things you'll need to do.

Update 4D Ajax Framework component:

    1. Open your database using 4D Insider (4D version 2004.5 or later).
    2. From the Components menu, select "Install/UpdateÖ"
    3. Locate and open 4D Ajax Framework 1.1.4CP.
    4. The first prompt is to confirm your update, click "OK".
    5. If you have made changes to one of the DAX_DevHook methods, you will be prompted again. Click "No All" if you wish to keep your current Developer Hook intact. Otherwise click "Yes" or "Yes All".
    6. Quit 4D Insider.

Update 4D Ajax Framework Library and Client:

    1. Open the DAX folder inside the 4D Ajax Framework 1.1 folder.
    2. Select and copy all files and folders to the clipboard.
    3. Open your database web folder and paste the files and folders from the clipboard into that folder.
    4. Open the Extras folder inside the 4D Ajax Framework 1.1 folder.
    5. Open the Support folder.
    6. Select and copy all files and folders to the clipboard.
    7. Open your database's Extras folder.
    8. Open the Support folder and paste the files and folders from the clipboard into that folder.

Activate your update:

    1. Open your database with 4D.
    2. You will be prompted to update the structure XML files. Click "Yes".

Will upgrading affect any of my existing web applications?

If you are implementing your application using the client built into the 4D Ajax Framework, no. We've built version 1.1 with backwards compatibility in mind.

However, if you've done extensive customization of the existing features and methods into your own web application, you may see some small issues due to the new features we've added to the API. All changes to the API have been documented in the 4D Web 2.0 Pack wiki, so if in doubt, please check the wiki or contact Customer Support.

 

4D Ajax Framework is a part of 4D Web 2.0 Pack. 

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