Examples of org.eclipse.core.commands.AbstractHandler

org.eclipse.core.commands.AbstractHandler

This class is a partial implementation of IHandler. This abstract implementation provides support for handler listeners. You should subclass from this method unless you want to implement your own listener support. Subclasses should call {@link AbstractHandler#fireHandlerChanged(HandlerEvent)}when the handler changes. Subclasses can also override {@link AbstractHandler#isEnabled()} and{@link AbstractHandler#isHandled()}.
@since 3.1

            fViewer.getDocument().addDocumentListener(fDocumentListener);
            final GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
            gd.heightHint = fPage.convertHeightInCharsToPixels(10);
            gd.widthHint = fPage.convertWidthInCharsToPixels(40);
            fViewer.getControl().setLayoutData(gd);
            fHandler = new AbstractHandler() {
                @Override
                public Object execute(final ExecutionEvent event)
                        throws org.eclipse.core.commands.ExecutionException {
                    fViewer.doOperation(ISourceViewer.CONTENTASSIST_PROPOSALS);
                    return null;

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    return new ExecutionEvent(getCommandService().getCommand(commandId),
        Collections.emptyMap(), null, null);
  }


  private IHandler createHandler() {
    return new AbstractHandler() {
      @Override
      public Object execute(ExecutionEvent event) throws ExecutionException {
        return null;
      }
    };

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     *  
     * @param context
     */
    static synchronized void enableClearBlackboardCommand( final IToolContext context ) {
        if (clearEditBlackboardHandler == null) {
            clearEditBlackboardHandler = new AbstractHandler(){


                public Object execute( ExecutionEvent event ) throws ExecutionException {
                    Tool tool = ApplicationGIS.getToolManager().getActiveTool();


                    if (tool instanceof AbstractEditTool) {

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  private void activateHandler() {
    IHandlerService handlerService= (IHandlerService)PlatformUI.getWorkbench().getAdapter(IHandlerService.class);
    if (handlerService == null)
      return;
    
    IHandler handler= new AbstractHandler() {
      public Object execute(ExecutionEvent event) throws ExecutionException {
        if (ContentAssistHandler.this.isEnabled()) // don't call AbstractHandler#isEnabled()!
          fContentAssistant.showPossibleCompletions();
        return null;
      }

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   * should be created.
   */
  void checkCreatePinEditorShortcutKeyHandler() {
    if (pinEditorHandlerActivation == null) {
      final Shell shell = window.getShell();
      final IHandler pinEditorHandler = new AbstractHandler() {
        public final Object execute(final ExecutionEvent event) {
          // check if the "Close editors automatically" preference is
          // set
          IPreferenceStore store = WorkbenchPlugin.getDefault().getPreferenceStore();
          if (store

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  private void activateHandler() {
    IHandlerService handlerService= (IHandlerService)PlatformUI.getWorkbench().getAdapter(IHandlerService.class);
    if (handlerService == null)
      return;


    IHandler handler= new AbstractHandler() {
      public Object execute(ExecutionEvent event) throws ExecutionException {
        if (ContentAssistHandler.this.isEnabled()) // don't call AbstractHandler#isEnabled()!
          fContentAssistant.showPossibleCompletions();
        return null;
      }

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        .getCommand(COMMAND_ID_DUMMY_COME_BACK_LATER);
    this.dummyCommandComeBackLater.define(
        SharedFileFinder.TITLE_SHARED_FILES_LATER,
        SharedFileFinder.MESSAGE_SHARED_FILES_LATER,
        this.getLazyInitCategory(commandService));
    this.dummyCommandComeBackLater.setHandler(new AbstractHandler()
    {
      @Override
      public Object execute(ExecutionEvent event) throws ExecutionException
      {
        getPluginContext().getMessageDialogHelper().displayInformationMessage(

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    IHandlerService getHandlerService() {
        return (IHandlerService) getViewSite().getService(IHandlerService.class);
    }


    private void installEvalTopLevelSExpressionCommand() {
        getHandlerService().activateHandler(IClojureEditorActionDefinitionIds.EVALUATE_TOP_LEVEL_S_EXPRESSION, new AbstractHandler() {
        @Override
      public Object execute(ExecutionEvent event) throws ExecutionException {
          evalExpression();
          return null;
        }

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