Time for action – migrating the commands and handlers

Menu items are typically decoupled from the code that is executed to promote flexibility and re-use. In both Eclipse 3.x and Eclipse 4.x, commands are used to represent logical operations whilst handlers are used to execute the code. In order to create menus, the handlers and commands must be defined in the fragment.

1. Open the fragment.e4xmi file and go to the Model Fragments element in the tree. Click on Add to add a new Model Fragment, and then use org.eclipse.e4.legacy.ide.application as the Extended Element ID and commands as the Feature Name.

2. Select Command from the drop-down menu and click on Add to add new commands. Create a command with the ID com.packtpub.e4.migration.command.one and a Name of Action 1; then do the same with com.packtpub.e4.migration.command.two and com.packtpub.e4.migration.command.double. It should now look like:

   

3. Click on Model Fragments and then Add to create a new Model Fragment, this time using a Feature Name...