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Author: Javier Menendez

Working with Files: FolderItem

Sooner or later your app will need to work with files, maybe to save the data generated with the app itself, to open the files created with other apps or because is the main purpose of the utility you are working on. Xojo gives you the class FolderItem fully loaded with a useful bunch of properties that allow you to examine the attributes of any file; for example, the creation or modification of dates, the file path (in several formats), if the file is an alias, etc. The FolderItem class also gives you the methods to do a lot of file operations without effort.

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TextField: Getting the User Input

Xojo is a modern, powerful programming language with an IDE that simplifies all kind of tasks related your project creation and deployment. One such helpful feature is the UI layout design; you can find it under the Library Panel, it’s a meaningful collection of graphic classes (Controls) ready to use in our apps. Probably one of the first and most used controls in apps design is the TextField, TextField simplifies the way an app can get the input from the user. Let’s see its main properties and how this control behaves when used in Desktop, Web (WebTextField) and iOS (iOSTextField) apps!

You can watch the video (in Spanish, with English subtitles) as you read and work through this post.

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Creating Wrapper Apps With Xojo

You already know, you can use Xojo to create practically any kind of application; from apps used by corporations, Universities and even Government agencies around the world, to apps used by photographers, designers and, of course, developers; and even those small utilities that makes our lives a bit easier.

In fact, a lot of these little utilities are what are known as Wrappers. That is, a nice user interface that simplifies and makes more user friendly a feature that is already available in the native operating system; often, in the form of one or more combined commands that need to be typed from the Command Line prompt.

You can watch the video (in Spanish, with English subtitles) as you read and work through this example.

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Raspberry Pi and Xojo: Configure for Remote Access

Xojo is a superb choice for developing and deploying apps for Raspberry Pi. After all, Xojo not only simplifies making the User Interface of your apps via drag and drop, it’s an object-oriented and event oriented programming language that builds native Linux apps based on the ARM processor architecture for the Raspberry Pi (among other platforms).

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Design Patterns in Xojo: Observer, Part II

In previous blog entries we saw how easy it is to implement the Design Pattern Singleton and how we can find the Observer Design Pattern already implemented on several Xojo features by default, greatly simplifying our code and interaction between the objects. Now, as promised, it is time to put it all in practice, creating our own Notification Center: a class that will allow us to share the same unique instance for the entire App (Singleton), and that can use any object in order to register itself for receiving notifications by the observed Control, for one or more message (the notifications themselves).

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iOS Tutorial: Shorten that URL!

In this Xojo tutorial we will see how simple it is to make an iOS App that shortens an entered URL using the public API of Bit.ly. We will use our own subclass inherited from Xojo.Net.HTTPSocket, and the Declare statement in order to use some functions and methods found on the native Cocoa Touch API. In fact, the use of Declare is mandatory because with the new Xojo Framewok we don’t yet have access to the EncodeURLComponent function available with the old framework. This one is a big help in substituting any ilegal character with his hexadecimal value for the final URL’s composition.

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Make an RSS Reader with Xojo…in 33 lines of code.

You have heard it many times: coding with Xojo is not just powerful and fun, it is fast, really fast! This is thanks to the fact that you have at your disposal the powerful Xojo Framework, with a lot of classes ready to use doing the hard work behind the scenes. In fact, this article shows you how can create a multi-platform RSS Reader…writing just 33 lines of code!

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