Sometimes it’s preferable to have the lines of an object keep their original width, regardless of the applied transformation. For example, you draw a line on a map showing a user’s position and a destination. When the user zooms in on the map, you want to enlarge the map but have the line maintain its width.
Adding a block of comments at the beginning of a method is useful for adding a note about what a method does, as well as a list of input/output parameters. And having a few lines of human-readable text within a complicated section of code can be convenient to help you and others recall the purpose of this particular section of code. Beginning with 4D v18, your programming experience is enhanced with the addition of comment blocks!
4D Write Pro has been designed to create all kinds of documents, from the most simple to the most sophisticated. To achieve this diversity, documents can hold distinct parts, like paragraphs, sections, headers, footers, etc. Once filled in, 4D Write Pro behaves in such a way that all of these parts can be read. However, sometimes some parts must be resized according to their content. This is typically the case for headers and footers whose height can change automatically. This functionality is generally very useful, but sometimes it’d be more practical to set the heights of headers and footers to constant values (even if their content may be truncated and no longer be fully visible).
So your application has been developed and you’re ready for the next step. 4D lets you:
- generate a compiled database that no longer contains any interpreted code,
- generate a standalone application that can be double-clicked, (i.e., merged with 4D Volume Desktop, 4D’s database engine),
- generate client/server applications with automatic updates of client and server parts.
Wondering how to create a nice and dynamic user interface? Typically when a form is resized, the form objects whose horizontal sizing or vertical sizing properties are set to move or grow, are automatically resized. In some cases (e.g., finer user interface management), developers choose to manage form object size and position by programming. To do so, they check the “on resized” event which is triggered within the form method. But what happens when the form contains one or more subforms? On many levels? This blog post gives you the answers!
4D provides libraries to help you develop applications. One of these libraries is standard and contains preconfigured form objects and widgets, while other libraries are custom. The standard library is “read-only” and its behavior doesn’t change when developing project databases (with the exception of minor, cosmetic interface differences). You also have the ability to create your own custom libraries to save your own form objects or group of objects. In this case, a few changes have been made to make them even more powerful. The following is everything you need to know about these changes:
Have you ever needed to use methods with both thread-safe and not thread-safe calls, with conditions that skip over commands that are not thread-safe? Currently the compiler prevents doing this and an error is thrown, however there’s a flag that lets you disable this check and this blog post shows you how.
Want to use 4D Write Pro to create HTML emails with static pictures in the text? Maybe something like a fancy newsletter with pictures of the top ten destinations in the world, or simply include your company logo? Wondering how to accomplish this? Wonder no more because with the 4D v18, you can in three simple steps:
In this blog post, we showed you how to convert a binary database into a project database. Once everything is ready and the conversion has successfully completed, you can start working with your project database. However, some questions may arise: are all the files in the database useful? It’s obvious that the”.4DB” structure file is no longer needed. Can I delete other files?
Here’s everything you need to know after the conversion.
Before exchanging files (by email for example), we often compress them to reduce their size before transmitting them. With 4D v18, you can compress and uncompress your files by programming without the need for external libraries or tools. Here are the new commands that allow you to do so:
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