I have a working educational Java-palette Module for Netbeans that helps first-year students learn the basics of programming without needing to worry so much about syntax.
When a student drags an item from the palette, they get a popup that allows them to fill-in the details of the code to be dropped, such as variable names or values. I have ComboBoxes that list all the variables in the document. For the Java version of the palette, I simply used JavaParser to get a list of the variables, method names, classes, etc.
Now, I'm doing a version of this palette for C++ students. This time around, I'd rather not use JavaParser, javacc, ANTLR, etc as it seems like overkill. NetBeans already has the list I need when you hit Ctrl+space, but I can't find a way to access the list from a form. Geertjan has a great tutorial on using code completion in a JEditorPane
which addresses implementing your own code completion provider which brings me back to square one.
And this page suggests that NetBeans is simply grabbing a list of variables from the debugger stack. The debugger API doesn't suggest any straight forward methods for asking for a variable list that I could discern.
Any suggestion on using Netbeans APIs to grab a list of variables from a C++ source file, rather than resorting to a parser?
Related
I'm currently working on a training plugin, where every player would get his own region, to learn bridge for example. So when a player joins, the plugin should automatically generate a new area for this player and delete it when he leaves.
I've created a SetupCommand where you have to set the start and end of the region that should be copied.
Now the only thing to do is copy the region and teleport the player to it, however, I couldn't find any good ways to do that. The only solution I found so far is to loop through all blocks and copy them one by one. But I can imagine that this is not the best solution and would cause lag, not only server-side but also client-side.
Are there better ways to clone a region than that?
I've read you should use Schematics but they weren't going into detail.
If you are experienced with java and feel comfortable about your skills you can try to get the blocks in the list as List and save it as base64 into your database or whatelse. You can parse it everytime back into a list of blocks and replace it. I would rather recommend you to make a custom block class with implements Serializeable and then add some values like Location, Material and BlockData to it.
Use FAWE or WorldEdit to copy/paste sections
If you use Block#setType, performance will be very slow, so if you don't want to use the API, you should use NMS, but using NMS is not a good practice.
Disadvantages of NMS:
Most nms methods are obfuscated. In one version the method is called f(), in the next version maybe c().
How to copy/paste with FAWE:
https://www.spigotmc.org/threads/how-to-paste-a-schematic-with-fawe.402950/
How to copy/paste with worldedit:
https://www.spigotmc.org/threads/worldedit-api-schematic-copy-save-load-and-paste.498476/
In conclusion, it is recommended to use the API
I'm working on an application that has a huge list of key value pairs in multiple languages and I'm using the Eclipse RCP model with NLS.
For anyone unfamiliar with this, you have multiple properties files in different languages and the framework generates classes full of static strings for the current language.
Thus I can have I18NMessageTooltip.Cancel that provides a tooltip for the cancel button, in the currently selected language, whatever it may be. Same for labels and many other things.
The problem is, the same translation properties files have a great many things that I need to search trough.
As a stop gap, I made a search using reflection, but that is, in my opinion, quite inelegant.
Is there any other way to search through I18N static fields, other than either:
a. Reflection
b. Reinventing the wheel and searching through the properties files by hand
I am debugging a program, and once I step in an instruction, I get a list of variables in the Variables view, or if I hold the mouse on the variable, the its value is shown.
Now, I have an object that could possibly have many references to other objects, which, in turn, have their own attributes that contain other objects and so on. The search space could become very large. I would like to find where these values could be by searching the object attributes by value. Eclipse already searches these objects by attribute.
I tried EVars plugin, but it doesn't seem to be still compatible with Eclipse 4.4. Any other tools or recommendations on how to do it?
Thank you very much!
While debugging you can use the "Display" window where you can write pieces of code and "execute" them with inspect (highlight the code -> right click -> inspect).
In that window you have access to all variables of the breakpoint's context.
You could use some java 8 streams snippets to filter your objects.
https://help.eclipse.org/neon/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Freference%2Fviews%2Fdisplay%2Fref-display_view.htm
https://help.eclipse.org/neon/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Ftasks%2Ftask-evaluating_expressions.htm
I'm developing an application to my software engineering class and one of the requisites is that it has 2 or more languages in the interface. I already implemented that. On the other hand, it is required that the user can change the language on its own will by choosing from a combobox or something like that.
As i'm using AWT and Netbeans, I can't edit the initComponents method of the form, as it is automatically generated. I have the option below in mind, but don't know if they would even work, so I'm asking for help.
-Edit the constructor of my class so that it looks like this:
public JFmyConstructor() {
initComponents(); //auto-generated
myInitMethod();
}
The problem I think i'm going to find is that I need to call the constructor one time after the interface is already running (and thus, all objects instantiated. Is there a workaround for this?
Probably my answer comes a little late (too bad you put wrong title)...
Obviously you do not have to call any constructor in order to switch language at runtime. In Java Desktop applications it is as ease as:
Locale brazilian = new Locale("pt", "BR");
Locale.setDefault(brazilian);
Of course if you want to switch it via JComboBox, you would probably do it a bit different. What I would do, I would actually create Model (Swing promotes MVC Design Pattern) that will hold data (different Locales) and I would set default Locale in correct ActionListener. It is not easy though.
Of course I would rather use native names for Locales. If you have them constructed, you can easily get native name Locale name by simply calling getDisplayName() passing itself as a parameter:
String brazilianNativeName = brazilian.getDisplayName(brazilian);
The result might be unsatisfactory for certain Locales (I believe Brazilian Portuguese is unfortunately one of them), but there is not much you can do about it (unless you use your own string).
To be honest, for just two languages, I would probably use some links instead. You can use simple JLabels to do that, just set correct font properties and color and assign common ActionListener. You can then query which one was actually clicked and create and set Locale appropriately. For homework that should be sufficient.
SWT and NetBeans is a weird combination. If you can do things the "normal" way with SWT and use Eclipse, then there's a powerful set of tools for managing localization, all built right in. See, for example, this introduction.
The best way is to use resource injection for all components (rather than getting i18n strings from a Bundle at panel construction time).
Resource Injection is available in a number of open source libraries or frameworks.
Since you use NetBeans, you should be able to generate an application based on Swing Application Framework (SAF), which already supports Resource Injection.
Otherwise, there are also libraries out there that do just that; simply google for "swing" "resource injection" and you'll find, e.g. Fuse library.
Edit:
You should also take a look at this SO question that deals exactly with the same problem, and which has more detailed answers (including my own).
Is there a simpler way of reordering methods within a class source file in IntelliJ than cutting and pasting the code manually? Nowadays I often need this while refactoring legacy code, e.g. to move related methods close to each other in the source code.
In Eclipse AFAIK there is a view similar to the Structure view of IntelliJ, where I can drag and drop methods around. However, this does not work in IntelliJ and I couldn't find any hints from its help either.
I am using IntelliJ 9.0.2 to be specific.
You can select a method name and hit: Ctrl+Shift+Up or Ctrl+Shift+Down to move it up and down.
On OS X: Cmd+Shift+Up or Cmd+Shift+Down
Beyond this the Rearranger Plugin lets you move methods around quickly, and even define a standard ordering based on your coding convention.
IntelliJ has a built in system that allows you to specify how to order your methods. You need to go to Settings (Ctrl + Alt +S) -> Editor -> Code Style -> Java -> Arrangement (tab) and scroll down until you find the icons with methods. There you can manipulate the options to sort them by visibility, or alphabetically, or to keep related ones grouped together.
Here is a screenshot of my settings which will order methods automatically by visibility (public, protected, private) and alphabetically (a-z).
The blue highlights show the currently selected rules.
Not a perfect answer yet, due to a bug in IntelliJ.
Though IntelliJ offers this feature implicitly, but it needs to be enabled as well as fixed. The OP's suggested way is technically arranging methods in depth-first order. However, if you use Breadth-first ordering(which works properly), it should reduce the manual work of moving functions by a lot, by arranging all caller and callee methods together.
Issue Link: https://youtrack.jetbrains.com/issue/IDEA-149524. Please do vote for its resolution.
The appropriate action for this is Rearrange Code. This has no key assigned to it, but you can define your own using Preferences->Keymap.
With your cursor on the method definition line (you do not have to and press ctrl+shift+up or ctrl+shift+down, to move up or down respectively.
You can also to ctrl+shift+numberpad - to quickly collapse everything so you can focus on moving around (plain - works on my laptop as well, not sure why) and ctrl+shift+numberpad + to get back to see everything (ctrl-shift-equals works on my laptop as well).
Select a block of text (hit Ctrl-W a few times) and then use Ctrl-Shift-Up and Ctrl-Shift-Down to move it around.
There is an automated way, which you can later tweak
Code -> show reformat file dialog
and tick "rearrange code" box