Eclipse-Praktikum WS 12/13
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  • The Plug-in Architecture of Eclipse

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  1. New -> Project...
  2. In the project wizard, choose Plug-in Project and click Next.
  3. As the project name, enter de.cau.cs.rtprakt.login.simple. Uncheck Use default location (which would put the project into your workspace), and put it into your local clone of the Git repository instead (the Location should read something like /path/to/git/repository/de.cau.cs.rtprakt.login.simple). Click Next.
  4. As the name, enter Simple (login). Also, make sure that Generate an activator and This plug-in will make contributions to the UI are both checked. Click Finish. (Eclipse might ask you whether you want to switch to the Plug-in Development Perspective, which configures Eclipse to provide the views that are important for plug-in development. Choose Yes. Or No. It won't have a big influence on your future...)
  5. Eclipse has now created your new plug-in and was nice enough to open the Plug-in Manifest Editor, which allows you to graphically edit two important files of your plugin: plugin.xml and META-INF/MANIFEST.MF. (By the way, this would be a great time to research the editor and the two files online.) Basically, those two files provide information that tell Eclipse what other plug-ins your plug-in needs and how it works together with other plug-ins by providing extensions and extension points. Our new plug-in will depend on two other plug-ins, so switch to the Dependencies tab of the editor and add dependencies to org.eclipse.ui.editors and org.eclipse.jface.text. Save the editor and close it. (You can always reopen it by opening one of the two mentioned files from the Package Explorer.)

 

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Create the Main Editor Class

We will now create the class that implements the simple text editor. There won't be any programming involved here since we're lazy; instead, we will just inherit from an existing simple text editor.

  1. New -> Class.
  2. Package: de.cau.cs.rtprakt.login.simple.editors. Name: SimpleEditorPart. Superclass: org.eclipse.ui.editors.text.TextEditor. Click Finish.

Register the Editor

For the editor to be available inside Eclipse, we will have to register it by adding an extension to an extension point.

  1. Copy the attached file to a new subfolder icons in the plug-in folder (right-click the plug-in folder in the Package Explorer and choose New -> Folder...). You can copy the file by importing it from inside Eclipse (File -> Import... -> File System) or by copying it from outside Eclipse and refreshing the plug-in project afterwards (right-click the plug-in folder in the Package Explorer and choose Refresh).
  2. Open the Plug-in Manifest Editor again and switch to the Extensions tab.