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

    /* (non-Javadoc)
     * Method declared on PluginAction.
     */
    protected void initDelegate() {
        super.initDelegate();
    final IActionDelegate actionDelegate = getDelegate();
    if (actionDelegate instanceof IObjectActionDelegate
        && activePart != null) {
      final IObjectActionDelegate objectActionDelegate = (IObjectActionDelegate) actionDelegate;
      final ISafeRunnable runnable = new ISafeRunnable() {
        public void run() throws Exception {

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   * @param targetPart
   *            the new part target
   */
    public void setActivePart(IWorkbenchPart targetPart) {
        activePart = targetPart;
        IActionDelegate delegate = getDelegate();
        if (delegate instanceof IObjectActionDelegate && activePart != null) {
      final IObjectActionDelegate objectActionDelegate = (IObjectActionDelegate) delegate;
      final ISafeRunnable runnable = new ISafeRunnable() {
        public void run() throws Exception {
          objectActionDelegate.setActivePart(ObjectPluginAction.this,

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  /**
   * Returns the pulldown delegate. If it does not exist it is created. Can
   * return <code>null</code> if delegate creation failed.
   */
  protected IWorkbenchWindowPulldownDelegate getPulldownDelegate() {
    IActionDelegate delegate = getDelegate();
    if (delegate == null) {
      createDelegate();
      delegate = getDelegate();
    }
    return (IWorkbenchWindowPulldownDelegate) delegate;

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  }
  
  @Override
  public void run(IAction action) {
    final IFile agentFile = getSelectedAgentFile();
    final IActionDelegate wizard = getActionToRun();
    WorkbenchJob job = new WorkbenchJob(Display.getCurrent(),"Launch Wizard") {
      
      @Override
      public IStatus runInUIThread(IProgressMonitor monitor) {
        final Action action = new Action() {};
        wizard.selectionChanged(action, new StructuredSelection(agentFile));
          wizard.run(action);
      return Status.OK_STATUS;
      }
    };
    job.schedule();
  }

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  }
  
  @Override
  public void run(IAction action) {
    final IFile agentFile = getSelectedAgentFile();
    final IActionDelegate wizard = getActionToRun();
    WorkbenchJob job = new WorkbenchJob(Display.getCurrent(),"Launch Wizard") {
      
      @Override
      public IStatus runInUIThread(IProgressMonitor monitor) {
        final Action action = new Action() {};
        wizard.selectionChanged(action, new StructuredSelection(agentFile));
          wizard.run(action);
      return Status.OK_STATUS;
      }
    };
    job.schedule();
  }

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            } else if (actionObject instanceof IAction) {
                IAction action = (IAction) actionObject;
                action.run();


            } else if (actionObject instanceof IActionDelegate) {
                final IActionDelegate delegate = (IActionDelegate) actionObject;
                if (delegate instanceof IWorkbenchWindowActionDelegate)
                    ((IWorkbenchWindowActionDelegate) delegate).init(PlatformUI
                        .getWorkbench().getActiveWorkbenchWindow());
                Action proxy = new Action(this.action) {


                    public void run() {
                        delegate.run(this);
                    }
                };
                proxy.run();
            } else
                // we could not create the class.

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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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          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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          /* 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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   */
  public void share(IStructuredSelection selection, ShareProvider provider) {


    /* 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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