Extreme Java When vanilla Java is not enough


From Swing to NetBeans Platform (part 2)

In my previous post, I put an old Swing application to run as a NetBeans Platform Application. After some refactoring, I got it working, nicely integrated to NB's file editing support. Now, I'm converting their Tileset Manager from a JDialog to a TopComponent sensitive to global selection.

I started with a new "TileSet Manager" module, then moved the TSM dialog to that module and changed it to a JPanel. After adding a TC and putting the TSM Panel on it, half-work was done. Thanks to the Swing skills of Tiled team, the next step was a piece of cake. After tracking the global selection, I only made the right "setEditor" on their manager and voilá! The tileset table changes according to the selected file! God bless the NetBeans Team!

It's already very cool, but I want more. Their version uses JTables and lots of buttons on this dialog. What about using NBP's ExplorerManager? Easy as 1-2-3. I replaced the TSM Panel with a BeanTreeView plus some Nodes and the ExplorerManager (just like FeedReader tutorial). I could use OutlineView to keep the table look, but I plan to add some depth on this tree later. And, instead of a table with two columns, I use a nice tree view with HTML display name:

Migration of actions started by the most complex one: Delete. Adding the action to the ExplorerManager and their JButton's actionPerformed to Node.canDestroy and Node.destroy did the trick.

There were other actions, like "Save As" and "Embed". All of them were easy to convert. I cut the code on "actionPerformed", pasting it on new actions. I put them on NB layer and used this snippet to convert them to Node.getActions:

public Action[] getActions(boolean context) {
  List<Action> list = new ArrayList<Action>();
  for (Object obj : Lookups.forPath("...")
      .lookupAll(Object.class)) {
    if (obj instanceof JSeparator) {
    if (obj instanceof Action) {
      list.add((Action) obj);
  return list.toArray(new Action[list.size()]);