Recent Posts by Geertjan Wielenga

A Java application by a company offering NetBeans Platform trainings, in combination with Maven & Spring: Click to enlarge the images. Read more about it here.

I spent a weekend in Bonn, Germany, with fellow trainers Anton (Toni) Epple from Eppleton and Aljoscha (Josh) Rittner from Sepix, giving a training organized by AureliusConsult, a student consultancy: As always, there was a group picture near the end of the course, (this one taken by Toni which is why he isn't in it): We covered the basic principles of the NetBeans Platform. Below you see Josh explaining the Nodes API: And here's Toni talking about the Visual Library API: Aureliu...

Let's use org.openide.filesystems.annotations.LayerGeneratingProcessor for the first time. We will use it to process an @Action annotation which we will be able to set on ActionListeners in NetBeans Platform applications, as shown yesterday. Here's the definition of my @Action annotation, with Javadoc for "path()", so that you can see how, in yesterday's blog entry, the second screenshot was able to show Javadoc. package org.demo.action.annotation;import...

A picture speaks 1000 words: This great blog entry by Jaroslav Tulach provides most of the info you need for something like the above, coupled with a trip through the NetBeans sources to see how other annotations, such as @ServiceProvider are defined. Together, that should be all you need. It is by no means finished. For example, the display name should be referenced in the bundle, rather than hardcoded in the annotation. But there are already SO many benefits over the...

Creating a toggle button on the NetBeans Platform can be done in different ways, here's one of them. We'll create two actions that let us toggle between two JRadioButtonMenuItems: We'll begin by creating a utility class that returns a javax.swing.ButtonGroup, to which we'll add the current javax.swing.JRadioButtonMenuItem that we return from the NetBeans Platform Presenter.Menu. All along, we'll be using an ActionListener to define our action, since we're using NetBeans...

Mark Claassen, one of several NetBeans Platform developers I met for the first time at JavaOne 2009, is working on AccuRev support in NetBeans IDE: Plugin sources on Kenai Issue 159825: Support AccuRev CVS "It has some issues," writes Mark above, "but works pretty well for what it was designed for. The most important things for me were the quick-diff and seeing which files were modified." I installed the plugin above and then saw AccuRev represented in the place I would expect: If...

Let's now change our BeanTreeView from yesterday to an OutlineView. As you can see, below, you can use an OutlineView as a simple table, with the difference that it is a NetBeans Platform component, meaning that it can benefit from other NetBeans Platform components, such as Nodes. Let's answer two very frequently asked questions about OutlineViews: Question: How do I change the column name from "Nodes" to something else (such as "Persons") as shown above? Answer: Read the rela...

I've been wanting to figure out how to use Lookup from a toolbar for a while and now I have it working. When OK is clicked in the toolbar below, a new Person object is created and added to the InstanceContent that is in the Lookup of the toolbar. The ChildFactory that creates the Nodes in the Person window in the explorer mode is listening for Person objects and recreates the Nodes whenever a new Person object is identified. Once you realize that... the toolbar is a...

Thanks to this page, I set up MIDI on Ubuntu so that it works with Java-based applications, such as Impro-Visor and JFugue:Start up Timidity. timidity -iAqqq -B8,8 & You should see [something like] this: geertjan@geertjan-laptop:~$ TiMidity starting in ALSA server modeOpening sequencer port: 128:0 128:1 128:2 128:3 Start Jack. qjackctl You should see this: Now click "Connect". Connect the first VirMIDI port to the first Timidity port: Now you can use MIDI in the context of...