Examples of org.eclipse.core.commands.Command

org.eclipse.core.commands.Command

A command is an abstract representation for some semantic behaviour. It is not the actual implementation of this behaviour, nor is it the visual appearance of this behaviour in the user interface. Instead, it is a bridge between the two.

The concept of a command is based on the command design pattern. The notable difference is how the command delegates responsibility for execution. Rather than allowing concrete subclasses, it uses a handler mechanism (see the handlers extension point). This provides another level of indirection.

A command will exist in two states: defined and undefined. A command is defined if it is declared in the XML of a resolved plug-in. If the plug-in is unloaded or the command is simply not declared, then it is undefined. Trying to reference an undefined command will succeed, but trying to access any of its functionality will fail with a NotDefinedException. If you need to know when a command changes from defined to undefined (or vice versa), then attach a command listener.

Commands are mutable and will change as their definition changes.
@since 3.1


        }
        ICommandService service = (ICommandService) PlatformUI.getWorkbench().getAdapter(
                ICommandService.class);


        Command command = service.getCommand("org.locationtech.udig.tool.edit.clearAction"); //$NON-NLS-1$
        command.setHandler(clearEditBlackboardHandler);
        
        if(clearEditBlackboardCommandListener == null){
            clearEditBlackboardCommandListener  =  new ICommandListener(){


                public void commandChanged( CommandEvent commandEvent ) {
                    if (commandEvent.isHandledChanged()) {
                        commandEvent.getCommand().removeCommandListener(this);
                        clearEditBlackboardCommandListener = null;
                        
                        IMap map = ApplicationGIS.getActiveMap();
                        resetBlackboards(map);
                    }
                }


            };
            command.addCommandListener(clearEditBlackboardCommandListener);
        }
    }

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     *  Called from <code>EditToolHandler.disableListeners()</code>.
     */
    static synchronized void disableClearBlackboardCommand() {
        ICommandService service = (ICommandService) PlatformUI.getWorkbench().getAdapter(
                ICommandService.class);
        Command command = service.getCommand("org.locationtech.udig.tool.edit.clearAction"); //$NON-NLS-1$


        if(clearEditBlackboardCommandListener != null){
            command.removeCommandListener(clearEditBlackboardCommandListener);
            clearEditBlackboardCommandListener = null;
        }
        
        command.setHandler(null);


    }

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    ICommandService service = (ICommandService) PlatformUI.getWorkbench().getAdapter(
            ICommandService.class);
    private IHandler commandHandler;


    public void activate( EditToolHandler handler ) {
        Command command = service.getCommand(COMMAND_ID);
        IToolContext context = handler.getContext();
        commandHandler=new SnapBehaviourCommandHandler(context.getMapDisplay(), context.getMap());
        if (command != null)
            command.setHandler(commandHandler);
    }

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            command.setHandler(commandHandler);
    }


    public void deactivate( EditToolHandler handler ) {
        commandHandler=null;
        Command command = service.getCommand(COMMAND_ID);
        if (command != null)
            command.setHandler(null);
    }

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  private final AcceptEditCommandHandler commandHandler = new AcceptEditCommandHandler();
  private final MapPartListener mapPartListener = new MapPartListener();


  public void activate(EditToolHandler handler) {
    commandHandler.handler = handler;
    Command command = service.getCommand(COMMAND_ID);
    mapPartListener.command = command;
    mapPartListener.activate();
  }

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            ICommandService.class);
    private IHandler commandHandler;;


    public void activate( EditToolHandler handler ) {
        commandHandler=new AdvancedBehaviourCommandHandler(handler.getContext().getMapDisplay());
        Command command = service.getCommand(COMMAND_ID);
        if (command != null)
            command.setHandler(commandHandler);
    }

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            command.setHandler(commandHandler);
    }


    public void deactivate( EditToolHandler handler ) {
        commandHandler=null;
        Command command = service.getCommand(COMMAND_ID);
        if (command != null)
            command.setHandler(null);
    }

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            if (!ids.contains(tool.getId())) {
                ids.add(category.getId());


                for( String currentId : tool.getCommandIds() ) {
                    currentId=currentId.trim();
                    Command command = service.getCommand(currentId);
                    if (command != null)
                        command.setHandler(tool.getHandler(currentId));
                }
            }
        }
    }

View Full Code Here

    createDefaultPageButtonList(composite);
  }


  private void createDefaultPageLabel(Composite composite, int h_span) {
      final ICommandService commandSvc= (ICommandService) PlatformUI.getWorkbench().getAdapter(ICommandService.class);
    final Command command= commandSvc.getCommand(ITextEditorActionDefinitionIds.CONTENT_ASSIST_PROPOSALS);
    ParameterizedCommand pCmd= new ParameterizedCommand(command, null);
    String key= getKeyboardShortcut(pCmd);
    if (key == null) {
      key= SSEUIMessages.CodeAssistAdvancedConfigurationBlock_no_shortcut;
    }

View Full Code Here


public class ContentModelSynchWithEditorHandler extends
    AbstractHandler  {


  public Object execute(ExecutionEvent event) throws ExecutionException {
       Command command = event.getCommand();
       HandlerUtil.toggleCommandState(command);
       return null;
  }

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