JavaFX layout anf hover

I run into an issue that might be obvious to some… Never the less here it is.

I created a scene with a background image, labels, which have a PerspectiveTransformation applied to them, and Polygon shapes over the transformed labels, so I can have hover over the polygons and simulate an action of the label. Everything looked fine. However I never hovered over one of the polygons. I then added another polygon in the middle to the root StackPane. There happened the most curious thing: I only could hover over it when I moved in from the left side. This got me thinking, that there is probably some component on top, which has a transparent part there. Adding the polygon as the very last component confirmed this assumption. So add your components to the stack in the correct back to front order to avoid issues like this.

Using Groovy to update KPhotoAlbum database

Since some time now KPhotoAlbum crashes on my Linux Mint Debian Edition, when new images are searched (and some other actions). As this is really annoying I looked for solutions. Updating to a newer version than 4.1.1 was not possible. Compiling from source was also out due to library version conflicts. All I really needed was a way to add new files to the index.xml file, which is KPhotoAlbums database. Due to the XML nature of the problem, I gave Groovy a shot.

„Using Groovy to update KPhotoAlbum database“ weiterlesen

Cannot locate spring namespace

When starting my OpenPatrician application from within Eclipse everything worked fine. But when using the assembly everything fell apart. The reason for this is simple, once figured out. I am creating an assembly of all the modules and their dependencies. Should it happen, that different dependencies provide the same resource, say like a manifest file, the first file will end up in the final jar file.

The different spring dependencies define several configurations which I had only part of in the final jar file. These are the files located in META-INF of the spring-…jar files:

  • spring.factories
  • spring.handlers
  • spring.schemas

Now all you have to do is, merge the contents into one file and make sure that is the file that ends up in the final jar file.

To do this I created an additional MetaData module, which is the first dependency in the assembly maven project. That way the files from the MetaData module get picked up.

See also



SVN repository error

In the process of creating a maven release for OpenPatrician the SVN repository got currupted. Though I have no idea how. There were two different error messages:

svn: Checksum mismatch for ‚.svn/text-base/blah.ext‘;
expected: ‚f8d45250f7df5561635854165862fdd8‘,
actual: ‚644f85c4befa671150c5c6ec5fad9885‘

svn: Reading one svndiff window read beyond the end of the representation

The one side which had something to say about this was Andrew Hedges blog. As a result I checkout the version previous to the corruption, commited all the changes to a new revision save the corrupt file. Then I checked the pom.xml which apparently was corrupt in the repository. There I saw that the file was empty. Seems that svn commits do not really follow ACID. I deleted the file in the repo and forced the commit from my workspace, which worked.

Combining standalone application with Spring

When you are developing a standalone application, that you want to use with the SpringFramework, somewhere in your code you will have to load the application context. Potentially this results in chicken-egg problem, especially when you want to use a component in some class that is not a bean. This may have different causes:

  • It is the main class, that is used to start up the application
  • The constructor uses arguments that cannot be resolved with autowireing

There are different approaches to solve this, the most elegant one I will demonstrate. „Combining standalone application with Spring“ weiterlesen