Examples of org.eclipse.ui.IActionDelegate

org.eclipse.ui.IActionDelegate
Interface for actions contributed via an extension point.
This interface should be implemented by clients who need to contribute actions via an extension point. The workbench will generate a proxy action object on behalf of the plug-in to avoid having to activate the plug-in until the user needs it. If the action is performed the workbench will load the class that implements this interface and create what is called an action delegate object. Then the request, and all subsequent ones, are forwarded through the proxy action to the action delegate, which does the real work.
The proxy action is the one that appears in the UI, so the action delegate will need to talk to the proxy action in order to keep up an appropriate appearance. Once the action delegate has been created, it will be notified of all selection changes, allowing it to enable or disable the proxy action appropriately.
An action delegate cannot be consulted about selection changes before the action is performed because it does not exist. For this reason, control of the action's enable state should also be exercised through simple XML rules contained in the extension. These rules allow enable state control before the action delegate's plug-in is loaded.
Clients can choose to subclass the provided abstract implementation org.eclipse.ui.actions.ActionDelegate or implement the interface directly.
@see org.eclipse.ui.actions.ActionDelegate @see org.eclipse.ui.IActionDelegate2

            if (provider.isEnabled()) {
              shareMenu.add(new Action(provider.getName()) {
                @Override
                public void run() {
                  if (SendLinkAction.ID.equals(provider.getId())) {
                    IActionDelegate action = new SendLinkAction();
                    action.selectionChanged(null, selection);
                    action.run(null);
                  } else {
                    IBookMark bookmark = getBookMark(selection);
                    if (bookmark != null) {
                      String shareLink = provider.toShareUrl(bookmark);
                      new OpenInBrowserAction(new StructuredSelection(shareLink)).run();

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          if (provider.isEnabled()) {
            shareMenu.add(new Action(provider.getName()) {
              @Override
              public void run() {
                if (SendLinkAction.ID.equals(provider.getId())) {
                  IActionDelegate action = new SendLinkAction();
                  action.selectionChanged(null, selection);
                  action.run(null);
                } else {
                  Object obj = selection.getFirstElement();
                  if (StringUtils.isSet((String) obj) && !URIUtils.ABOUT_BLANK.equals(obj)) {
                    String shareLink = provider.toShareUrl((String) obj, null);
                    new OpenInBrowserAction(new StructuredSelection(shareLink)).run();

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          /* Copy Link */
          manager.add(new Action("Copy Link") {
            @Override
            public void run() {
              IActionDelegate action = new CopyLinkAction();
              action.selectionChanged(null, selection);
              action.run(null);
            }


            @Override
            public boolean isEnabled() {
              return !selection.isEmpty();
            }
          });


          /* Send Link */
          manager.add(new Action("Send Link") {
            @Override
            public void run() {
              IActionDelegate action = new SendLinkAction();
              action.selectionChanged(null, selection);
              action.run(null);
            }


            @Override
            public boolean isEnabled() {
              return !selection.isEmpty();
            }
          });
        }


        /* Update */
        {
          manager.add(new Separator("reload"));


          /* Update */
          manager.add(new Action("Update") {
            @Override
            public void run() {
              IActionDelegate action = new ReloadTypesAction();
              action.selectionChanged(null, selection);
              action.run(null);
            }


            @Override
            public ImageDescriptor getImageDescriptor() {
              return OwlUI.getImageDescriptor("icons/elcl16/reload.gif");

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          /* Update */
          manager.add(new Action(Messages.ApplicationActionBarAdvisor_UPDATE) {
            @Override
            public void run() {
              IActionDelegate action = new ReloadTypesAction();
              action.selectionChanged(null, selection);
              action.run(null);
            }


            @Override
            public ImageDescriptor getImageDescriptor() {
              return OwlUI.getImageDescriptor("icons/elcl16/reload.gif"); //$NON-NLS-1$

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          @Override
          public void run() {


            /* Special Case "Send E-Mail" action */
            if (SendLinkAction.ID.equals(provider.getId())) {
              IActionDelegate action = new SendLinkAction();
              action.selectionChanged(null, selection);
              action.run(null);
            }


            /* Other Action */
            else {
              Object obj = selection.getFirstElement();

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          if (provider.isEnabled()) {
            shareMenu.add(new Action(provider.getName()) {
              @Override
              public void run() {
                if (SendLinkAction.ID.equals(provider.getId())) {
                  IActionDelegate action = new SendLinkAction();
                  action.selectionChanged(null, selection);
                  action.run(null);
                } else {
                  Object obj = selection.getFirstElement();
                  if (StringUtils.isSet((String) obj) && !URIUtils.ABOUT_BLANK.equals(obj)) {
                    String shareLink = provider.toShareUrl((String) obj, null);
                    new OpenInBrowserAction(new StructuredSelection(shareLink)).run();

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    // TODO Auto-generated method stub


  }


  public final void dispose() {
    final IActionDelegate delegate = getDelegate();
    if (delegate instanceof IWorkbenchWindowActionDelegate) {
      final IWorkbenchWindowActionDelegate workbenchWindowDelegate = (IWorkbenchWindowActionDelegate) delegate;
      workbenchWindowDelegate.dispose();
    } else if (delegate instanceof IActionDelegate2) {
      final IActionDelegate2 delegate2 = (IActionDelegate2) delegate;

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      activeEditor = null;
    } else {
      activePart = page.getActivePart();
      activeEditor = page.getActiveEditor();
    }
    final IActionDelegate delegate = getDelegate();
    final IAction action = getAction();


    // Check to see if the view delegate should be initialized.
    if ((viewId != null) && (page != null) && (viewDelegate != null)) {
      final IViewPart viewPart = page.findView(viewId);

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  /**
   * Refresh the action enablement.
   */
  private final void refreshEnablement() {
    final IActionDelegate delegate = getDelegate();
    final IAction action = getAction();
    if ((delegate != null) && (action != null)) {
      delegate.selectionChanged(action, currentSelection);
    }
  }

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    // modification. If the selection needs to be modified
    // the action contributors should do so.


    // If the delegate can be loaded, do so.
    // Otherwise, just update the enablement.
    final IActionDelegate delegate = getDelegate();
    if (delegate == null && isSafeToLoadDelegate()) {
      loadDelegate();
    }
    refreshEnablement();
  }

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