Examples of org.eclipse.ui.IWorkbenchPart

org.eclipse.ui.IWorkbenchPart
A workbench part is a visual component within a workbench page. There are two subtypes: view and editor, as defined by IViewPart and IEditorPart.
A view is typically used to navigate a hierarchy of information (like the workspace), open an editor, or display properties for the active editor. Modifications made in a view are saved immediately.
An editor is typically used to edit or browse a document or input object. The input is identified using an IEditorInput. Modifications made in an editor part follow an open-save-close lifecycle model.
This interface may be implemented directly. For convenience, a base implementation is defined in WorkbenchPart.
The lifecycle of a workbench part is as follows:
- When a part extension is created:
  - instantiate the part
  - create a part site
  - call part.init(site)
- When a part becomes visible in the workbench:
  - add part to presentation by calling part.createControl(parent) to create actual widgets
  - fire partOpened event to all listeners
- When a part is activated or gets focus:
  - call part.setFocus()
  - fire partActivated event to all listeners
- When a part is closed:
  - if save is needed, do save; if it fails or is canceled return
  - if part is active, deactivate part
  - fire partClosed event to all listeners
  - remove part from presentation; part controls are disposed as part of the SWT widget tree
  - call part.dispose()
After createPartControl has been called, the implementor may safely reference the controls created. When the part is closed these controls will be disposed as part of an SWT composite. This occurs before the IWorkbenchPart.dispose method is called. If there is a need to free SWT resources the part should define a dispose listener for its own control and free those resources from the dispose listener. If the part invokes any method on the disposed SWT controls after this point an SWTError will be thrown.

The last method called on IWorkbenchPart is dispose. This signals the end of the part lifecycle.

An important point to note about this lifecycle is that following a call to init, createControl may never be called. Thus in the dispose method, implementors must not assume controls were created.

Workbench parts implement the IAdaptable interface; extensions are managed by the platform's adapter manager.
@see IViewPart @see IEditorPart


    private IWorkbenchPartReference getActivePartRef( List<IEntryEditor> editors )
    {
        for ( IEntryEditor editor : editors )
        {
            IWorkbenchPart part = ( IWorkbenchPart ) editor;
            IEditorPart activeEditor = part.getSite().getPage().getActiveEditor();
            if ( part == activeEditor )
            {
                IWorkbenchPartReference reference = part.getSite().getPage().getReference( part );
                return reference;
            }
        }
        return null;
    }

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    private boolean isOneOrMoreOpenSingleTabEntryEditors()
    {
        IWorkbenchPage activePage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
        for ( IEditorReference ref : activePage.getEditorReferences() )
        {
            IWorkbenchPart part = ref.getPart( false );
            if ( part != null && part instanceof IEntryEditor )
            {
                IEntryEditor editor = ( IEntryEditor ) part;
                if ( ( editor != null ) && ( editor.getEntryEditorInput() != null )
                    && ( editor.getEntryEditorInput().getExtension() != null )

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        getSite().getPage().addPostSelectionListener(this);
        getSite().getPage().addPartListener(partAdapter);
        ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_CHANGE);


        // Current selection & part
        IWorkbenchPart activePart = getSite().getPage().getActivePart();
        ISelection activeSelection = getSite().getWorkbenchWindow().getSelectionService().getSelection();
        selectionChanged(activePart, activeSelection);
    }

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    protected K getBootstrapTarget() {
        IWorkbenchPage page = getSite().getPage();
        if (page == null) {
            return null;
        }
        IWorkbenchPart part = page.getActivePart();
        if (part == null) {
            return null;
        }
        K target = getCurrent(part);
        return target;

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     * 
     * @param partRef
     * @return Target for the partRef
     */
    protected K getCurrent( IWorkbenchPartReference partRef ) {
        IWorkbenchPart part = partRef.getPart(false);
        if (part == null)
            return null;


        return getCurrent(part);
    }

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        return null;
      }
      
      IWorkbenchPage page = window.getActivePage();
      if( page!=null ){
        IWorkbenchPart part = page.getActivePart();
        if( part instanceof MapPart ){
          return (MapPart) part;
        }
      }

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    public void pageOpened( IWorkbenchPage page ) {
        page.addPartListener(this);
        IEditorReference[] editors = page.getEditorReferences();
        for( IEditorReference reference : editors ) {
            IWorkbenchPart workpart = reference.getPart(false);
            if( reference.getPart(false) instanceof MapPart ){
                MapPart part = (MapPart) reference.getPart(false);
                openMaps.add(part);
                
                if (page.isPartVisible(workpart)){
                    visibleMaps.add(part);
                }
            }
        }
        IViewReference[] views = page.getViewReferences();
        for( IViewReference reference : views ) {
            IWorkbenchPart workpart = reference.getPart(false);
            if( workpart instanceof MapPart ){
                MapPart part = (MapPart) reference.getPart(false);
                openMaps.add(part);
                
                if (page.isPartVisible(workpart)){

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        }
    }


    public void partActivated( IWorkbenchPartReference partRef ) {
        // make this the active map(if it is a MapPart)
        IWorkbenchPart part = partRef.getPart(false);
        if( part instanceof MapPart){
            addActivePart((MapPart) part);
        }
    }

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        }
    }


    public void partClosed( IWorkbenchPartReference partRef ) {
        // if active map then make previous map be the active map
        IWorkbenchPart part = partRef.getPart(false);
        removePart(part);
    }

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        removePart(part);
    }


  public void partVisible( IWorkbenchPartReference partRef ) {
        // if no active map then make this the active map (if it is a MapPart)
        IWorkbenchPart part = partRef.getPart(false);
        if( part instanceof MapPart){
            visibleMaps.add((MapPart) part);
            if( activeParts.isEmpty() ){
                activeParts.add((MapPart) part);
            }

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