AprendeXojo – Page 2 – Xojo Programming Blog

Make Your Own Classes Iterables

Published December 13, 2017 by Javier Menendez

In programming, iterators are the mechanisms that allow us to walk all the members of a collection without needing to know in advance how many of them compose such a collection; and for that we can find in Xojo the commands For Each… Next. What are the main differences in comparison to the conventional For… Next?

The first difference is that with For Each… Next we can’t assume that we are iterating the members of the collection in order, as it is the case when using the variable of the conventional For… Next as the Index in order to access a known member of the collection. The second difference is that the iterator will be invalid when the iterated elements are modified, or when we modify the amount of elements in the collection during the iteration process.

By default in Xojo, there are a couple of collections that are iterable: the already mentioned Arrays and also Dictionaries and FolderItem.Children. Wouldn’t it be great to extend this feature so we can add this behaviour to our own classes making them more flexible? The key to making this happen is using the two Class Interfaces already included in Xojo: Iterator and Iterable.

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Xojo and Community Growth in 2017

Published December 11, 2017 by Alyssa Foley

2017 has been a good year for Xojo! We hit some bumps but we’re ending the year with the much-awaited Xojo 64-bit IDE released in Xojo 2017r3.

Though we didn’t have a XDC in 2017, we’re gearing up for XDC 2018 in Denver in April. This is the longest between conferences in many years and we’re seeing an increase in early registrations. If you are planning on attending, please register soon. We have sold out before!

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Dates…What’s the difference?

Published October 31, 2017 by Javier Menendez

Some days ago (or long, long ago, depending when do you read these lines) I received an email from a developer that was porting code from his old VisualBasic domain to the native, multi-platform Xojo. He asked me how can to get the difference between two dates? I’m pretty sure that most of you will have the answer, but I told him he’ll need Xojo.Core.Date and Xojo.Core.DateInterval. If you want to know how easy it is or how to get the same result for all your code based on the old date class, then I invite you to continue reading…

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ipify for Xojo

Published September 26, 2017 by Javier Menendez

ipify is a very useful web service (an API) that promises to always be available to attend requests, letting us know the public (or external) IP address we are using to connect to Internet. We can get this small piece of information as pure Text or in JSON or XML formats.

This post was updated in 2021 to using Xojo’s API 2.0.

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RSA: Private/Public keys between Xojo and PHP

Published June 6, 2017 by Javier Menendez

Among other topics, Cryptography and data ciphering always fascinated me. Beyond their mathematical perspective, most of the time it is a matter of putting them in practice with developed solutions: dealing with data only visible between the transmitter and the receiver. As it happens, the Xojo framework makes it really easy to deal with ciphered data.

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ContainerControl: Making a Multiplatform Search Field

Published April 26, 2017 by Javier Menendez

The ContainerControl is one of the most versatile control classes included in the Xojo framework both for Desktop and Web apps. In fact, it paves the way to complex UI controls creation with the same simplicity you are used to while designing your window layouts. Even better, once you create your complex UI controls using the ContainerControl, you will be able to add them to your Window layouts as if they were regular controls. Plus, you will enjoy the fruits of better OOP encapsulation and the fact that you can create and use the controls dynamically at run time. Want to see this in action? Follow this tutorial and video to create the basis of a multiplatform search field based on the ContainerControl class.

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Raspberry Pi and Xojo: Configure for Remote Access

Raspberry Pi and Xojo: Configure for Remote Access

Published December 9, 2016 by Javier Menendez

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

Published November 15, 2016 by Javier Menendez

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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TextField with Autocomplete

TextField with Autocomplete

Published August 10, 2016 by Javier Menendez

Wouldn’t it be nice to have a TextField with Autocomplete for Xojo Apps, like we are used to in the Xojo IDE? You know, you start to type…

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

Published July 25, 2016 by Javier Menendez

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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Tag: AprendeXojo