Recent Posts by Geertjan Wielenga

SPISim is a leading consulting firm of EDA tools for platform signal and power integrity analysis. Many of the electronics products, such as cell phone, laptop and PC need to go through electrical analysis at various design and production stages. This is to make sure signal communications between components and interfaces like DDR, USB3, PCIe, will meet the desired speed and throughput.SPIPro is a NetBeans Platform application developed by SPISim to meetthese design...

Simtec in Switzerland provides services in the area of technical software development and associated consulting. One of their applications on the NetBeans Platform is Icasim Line of Sight. Developed with the flight-test department of armasuisse and the Swiss Air Force, the software collects data messages from Link-16, ADS-B, GPS, radar and other sources and combines, evaluates and displays the data in a single user interface. The software processes among many other messages...

The Netcrystals software, created in Austria, is a multipurpose scientific software that is mainly related to crystallography and diffraction. The software allows the user to create crystals from an asymmetric cell, using Wyckoff positions and symmetry information. Crystals can be displayed and manipulated graphically in a 3D environment. Zooming into the bottom left window above, the crystal and associated data is structured in a logical manner: The software can also be used to...

I'm participating in a seminar on Monday at Oracle Netherlands in Utrecht, for students from the University of Applied Sciences in Utrecht. As you can see below, my part is to introduce the concepts of Oracle JET (http://oraclejet.org) to the group. I am looking forward to it.

Here's a super handy tip for anyone using Oracle JET (http://oraclejet.org) or, in fact, anyone doing anything at all with HTML in NetBeans IDE. But, since I am convinced Oracle JET is pretty awesome, I'll focus in particular on Oracle JET components here. Let's take this scenario as a starting point, i.e., you're in the process of creating a modular Oracle JET application. Right now, you've opened the "home.html" document and you press Ctrl-Space. That brings up the code...

Following on from part 2, our requirements have now changed. Instead of showing the values of the selected row below the table, we want to remove the table when a row has been selected and replace that table with a new table that shows detailed information about the selected row. I'm not going to address the question of whether this is good UI design, since I have a feeling that rather than removing the table, you'd want the second table to appear below the first, to show...

There's an interesting question on the Oracle JET forum about reading an XML file into an Oracle JET application. The person asking the question is using a 'require' block, whereas below I'm using a 'define' block, since the code below is in a custom Oracle JET module, since Oracle JET is perfect for creating modular JavaScript applications. Here's the JavaScript side... define(['ojs/ojcore', 'knockout', 'ojs/ojtable'], function (oj, ko) { function mainContentViewModel() { ...

We've looked at selecting a row in an ojTable, by making use of the "beforecurrentrow" event callback as an ojComponent binding property. Let's do the same now for an ojTree, again in a custom module, i.e., using a 'define' block instead of a 'require' block as done in the Oracle JET Cookbook.  For this simple scenario, whenever a node is selected, an H2 below the tree appears, showing information about the current selection, i.e., you can see above that 'News' is selected...

I got some help from my colleague Max Starets yesteday, who told me about the 'beforecurrentrow' property of the 'ojComponent' binding expression... which was exactly what I was looking for: Make sure to type 'beforecurrentrow' exactly as shown above, i.e., all lower case. It's strange that 'beforecurrentrow' is not shown in the code completion box in NetBeans IDE for the 'ojTable' component. Maybe it's a new property, I don't know. Anyway, now that I don't need to assign the...