Dirk Lemmermann – Page 5

Shadow Fields vs. Property Accessor Interface

Carl Dea recently followed up on a blog post of mine called Save Memory! Use Shadow Fields for Properties. In his blog he suggested the use of an interface called "Property Accessor" to eliminate the heavy use of boilerplate code that is needed in order to use shadow fields. Carl also mentioned that he hasn't tested his approach with a lot of data and that he or some reader might follow up with a performance comparison. So here it comes. I wrote a small test application that implements the three strategies that Carl mentions in his post: standard properties that are instantiated [...]

By Dirk Lemmermann|2021-02-18T13:42:26+01:00April 4th, 2016|Java, JavaFX, Tips & Tricks|2 Comments

CalendarFX In Action: SkedPal!

If you are interested you can now see CalendarFX live in action. As of version 1.7 the AI scheduling software SkedPal has replaced their Swing-based calendar (MigCalendar) with CalendarFX 1.3 for JavaFX 8. The result is a much more consistent look and feel and user experience.

By Dirk Lemmermann|2021-02-18T13:42:26+01:00April 1st, 2016|CalendarFX, JavaFX|0 Comments

JavaFX Tip 23: Save Memory! Shadow Fields for Properties.

Properties and property bindings introduced in Java 8 are extremely useful programming concepts. They are especially useful when you are developing user interfaces. In fact they are so useful that developers have fallen victim to the idea that everything should be a property instead of a primitive. Unfortunately they easily forget that properties such as SimpleLongProperty are much bigger objects than standard types such as Long. And of course they are much bigger than primitive data types such as long. In one of my current projects pretty much every model object used by the client is composed of properties. For many of these [...]

By Dirk Lemmermann|2021-02-18T13:42:26+01:00March 30th, 2016|Java, JavaFX, Tips & Tricks|21 Comments

CalendarFX 1.3 Released Today!

I have released a new version of CalendarFX today. Version 1.3 contains several small bug fixes, important memory leak fixes, and most importantly a big fix for correctly displaying different "first day of week" (e.g. Mondays in Germany, Sundays in the US). The new release can be downloaded as usual at http://www.calendarfx.com. Please take it for a spin and let me know what you think. CalendarFX is a UI framework for JavaFX 8. It contains several custom controls for visualizing standard calendar information (day, week, month, year view). CalendarFX is a commercial framework that is available for licensing.

By Dirk Lemmermann|2021-02-18T13:42:26+01:00March 20th, 2016|CalendarFX, JavaFX|4 Comments

Never too old to learn!

Yesterday (March 16th) I celebrated my 47th birthday. I am now packing a solid 20 years of work experience and a masters degree in computer science. Still I managed to screw up bad. A potential customer of mine, who is currently evaluating FlexGanttFX for their application, contacted me and argued that the initial model creation takes too long. 22 seconds to be precise. I asked them to send me a standalone demo and when I ran it I could confirm that it takes a long time to create the model. After further investigation I realized that they were creating over 5 [...]

By Dirk Lemmermann|2016-07-15T16:01:33+02:00March 17th, 2016|FlexganttFX, Java|1 Comment

JavaFX Missing Features Survey: Table View

The TableView (and TreeTableView) of JavaFX has won the prize for being the control that was mentioned the most in my recent "JavaFX Missing Features" survey and also in many follow-up discussions (including and especially the guys in our Zurich JavaFX Meetup group). I guess one of the reasons is the simple fact that almost every application needs a table view. The two most requested features / improvements for the TableView were freezing rows / columns and better editing support. Freezing Rows / Columns Freeze / lock rows - the ability to have one or more rows to stay at [...]

By Dirk Lemmermann|2021-02-18T13:42:26+01:00February 3rd, 2016|Java, JavaFX|9 Comments

FlexGanttFX 1.4.0 Released!

I am very happy to announce that I have released version 1.4.0 of FlexGanttFX for JavaFX. This release contains bug fixes and small improvements. I am glad to say that FlexGanttFX has proven itself in the field and is operational in various large enterprise applications. Some of its more prominent users are: Emirates Airlines European Broadcasting Union Airbus PSI PolandThe following are a couple of screenshots from these applications. PSI Logistics European Broadcasting Union Emirates Airlines MINT Software Systems

By Dirk Lemmermann|2021-02-18T13:42:26+01:00February 3rd, 2016|FlexganttFX, JavaFX|0 Comments

JavaFX: TouchGesture Memory Leak?

In one of my projects I was fighting with a memory leak the last couple of days (yes ... "couple") and I came to the conclusion that there might be an issue related to touch / scroll gestures. In the sample below I have two buttons. The first one creates a list view with one thousand rows, the second one removes it. I made the following observations: when I click on "create" and immediately on "destroy" then everything will be garbage collected. when I click on "create" and use the scrollbar to scroll down and then click on "destroy" [...]

By Dirk Lemmermann|2021-02-18T13:42:26+01:00January 29th, 2016|JavaFX|5 Comments

JavaFX “Missing Features” Survey Results

I recently conducted a survey asking the community to tell me which features they are missing the most in JavaFX 8. The survey has been closed by now. It received over 100 submissions from various people, various companies, various industries. Overall the participants very quite satisfied with JavaFX so I would argue that the feedback was submitted by people who really care about the platform and would like to see it evolve over time. The following chart shows the exact distribution of the answers given by the participants when asked how satisfied they were with JavaFX. Categories / Issue [...]

By Dirk Lemmermann|2021-02-18T13:42:26+01:00January 25th, 2016|Java, JavaFX|0 Comments

JavaFX Real-World Apps: PSI Advanced Scheduling and Monitoring

I am happy to announce that there is a new entry for the "Real-World Apps" list. The company PSI has developed an application for "advanced scheduling and monitoring". The software will be used by the manufacturing industry. The screenshots look quite polished and attractive. PSI is one of the earliest adopters of FlexGanttFX, my JavaFX framework for visualizing schedules of any kind. https://youtu.be/hXdvTlca6rM?w=550 PSI - Operation Gantt PSI - Operation Detail PSI - Production Order PSI - Report PSI - Structural Gantt As usual I have done an interview with the developers. Michal [...]

By Dirk Lemmermann|2021-02-18T13:42:26+01:00January 25th, 2016|FlexganttFX, Java, JavaFX|2 Comments

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About Dirk Lemmermann