Examples of org.eclipse.ui.IPerspectiveDescriptor

org.eclipse.ui.IPerspectiveDescriptor
A perspective descriptor describes a perspective in an IPerspectiveRegistry.
A perspective is a template for view visibility, layout, and action visibility within a workbench page. There are two types of perspective: a predefined perspective and a custom perspective.
- A predefined perspective is defined by an extension to the workbench's perspective extension point ("org.eclipse.ui.perspectives"). The extension defines a id, label, and IPerspectiveFactory. A perspective factory is used to define the initial layout for a page.
- A custom perspective is defined by the user. In this case a predefined perspective is modified to suit a particular task and saved as a new perspective. The attributes for the perspective are stored in a separate file in the workbench's metadata directory.
Within a page the user can open any of the perspectives known to the workbench's perspective registry, typically by selecting one from the workbench's Open Perspective menu. When selected, the views and actions within the active page rearrange to reflect the perspective.

This interface is not intended to be implemented by clients.
@see IPerspectiveRegistry

    return new PerspectiveEvent(new Interval(dateTime, dateTime.plus(1)), p);
  }


  @Override
  protected PerspectiveEvent createEventDiff(DateTime dateTime) {
    IPerspectiveDescriptor p = PlatformUI.getWorkbench()
        .getPerspectiveRegistry().getPerspectives()[1];
    return new PerspectiveEvent(new Interval(dateTime, dateTime.plus(2)), p);
  }

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    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ILabelProvider
     */
    public final Image getImage(Object element) {
        if (element instanceof IPerspectiveDescriptor) {
            IPerspectiveDescriptor desc = (IPerspectiveDescriptor) element;
            ImageDescriptor imageDescriptor = desc.getImageDescriptor();
            if (imageDescriptor == null) {
                imageDescriptor = WorkbenchImages
                        .getImageDescriptor(IWorkbenchGraphicConstants.IMG_ETOOL_DEF_PERSPECTIVE);
            }
            Image image = (Image) imageCache.get(imageDescriptor);

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    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ILabelProvider
     */
    public final String getText(Object element) {
        if (element instanceof IPerspectiveDescriptor) {
            IPerspectiveDescriptor desc = (IPerspectiveDescriptor) element;
            String label = desc.getLabel();
            if (markDefault) {
                String def = PlatformUI.getWorkbench().getPerspectiveRegistry()
                        .getDefaultPerspective();
                if (desc.getId().equals(def)) {
                    label = NLS.bind(WorkbenchMessages.PerspectivesPreference_defaultLabel, label );
                }
            }
            return label;
        }

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    dialog.open();
    if (dialog.getReturnCode() == Window.CANCEL) {
      return;
    }


    final IPerspectiveDescriptor descriptor = dialog.getSelection();
    if (descriptor != null) {
      openPerspective(descriptor.getId(), activeWorkbenchWindow);
    }
  }

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          page.activate(part);
        }
      }
      
      if (selectedItem instanceof IPerspectiveDescriptor){
              IPerspectiveDescriptor persp = (IPerspectiveDescriptor) selectedItem;
              page.setPerspective(persp);
      }


    }
  }

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         * Convert the perspective descriptors to actions, and filter out
         * actions using the activity/capability mechanism.
         */
        final List actions = new ArrayList(persps.size());
        for (Iterator i = persps.iterator(); i.hasNext();) {
            final IPerspectiveDescriptor descriptor = (IPerspectiveDescriptor) i
                    .next();
            final IAction action = getAction(descriptor.getId());
            if (action != null) {
                if (WorkbenchActivityHelper.filterItem(action)) {
          continue;
        }
                actions.add(action);

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     * @since 3.1
     */
    private final IAction getAction(final String id) {
        IAction action = (IAction) actions.get(id);
        if (action == null) {
            IPerspectiveDescriptor descriptor = reg.findPerspectiveWithId(id);
            if (descriptor != null) {
                action = new OpenPerspectiveAction(window, descriptor, this);
                action.setActionDefinitionId(id);
                actions.put(id, action);
            }

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    }


        String[] ids = page.getPerspectiveShortcuts();


        for (int i = 0; i < ids.length; i++) {
            IPerspectiveDescriptor desc = reg.findPerspectiveWithId(ids[i]);
            if (desc != null && !list.contains(desc)) {
                if (WorkbenchActivityHelper.filterItem(desc)) {
          continue;
        }
                list.add(desc);

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                .getShell(), reg);
        dlg.open();
        if (dlg.getReturnCode() == Window.CANCEL) {
      return;
    }
        IPerspectiveDescriptor desc = dlg.getSelection();
        if (desc != null) {
            run(desc, event);
        }
    }

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        if (data == null || !(data instanceof PerspectiveBarContributionItem)) {
      return;
    }


        PerspectiveBarContributionItem pbci = (PerspectiveBarContributionItem) data;
        IPerspectiveDescriptor selectedPerspective = pbci.getPerspective();


        // The perspective bar menu is created lazily here.
        // Its data is set (each time) to the tool item, which refers to the SetPagePerspectiveAction
        // which in turn refers to the page and perspective.
        // It is important not to refer to the action, the page or the perspective directly

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