Examples of org.eclipse.ui.forms.editor.IFormPage

org.eclipse.ui.forms.editor.IFormPage
Interface that all GUI pages need to implement in order to be added to FormEditor part. The interface makes several assumptions:
- The form page has a managed form
- The form page has a unique id
- The form page can be GUI but can also wrap a complete editor class (in that case, it should return true from isEditor() method).
- The form page is lazy i.e. understands that its part control will be created at the last possible moment.
Existing editors can be wrapped by implementing this interface. In this case, 'isEditor' should return true. A common editor to wrap in TextEditor that is often added to show the raw source code of the file open into the multi-page editor. @since 3.0

    _dirty = true;
    firePropertyChange(IEditorPart.PROP_DIRTY);
    validateModel();
    
    // dynamic page handling
    IFormPage page = findPage(ShortcutsConfigurationPage.ID);
    if (_model.isFeatureSupported(WGADesignConfigurationModel.FEATURE_SHORTCUTS)) {
      if (page == null) {
        try {
          page =new ShortcutsConfigurationPage(this);
          ((ShortcutsConfigurationPage)page).setModel(_model);
          addPage(SHORTCUTS_PAGE_INDEX, page);          
        } catch (PartInitException e) {
        }
      }
    } else if (page != null) {      
      removePage(page.getIndex());
    }
    
    page = findPage(SchemaConfigurationPage.ID);
    if (_model.isFeatureSupported(WGASchemaDefinitionModel.FEATURE_SCHEMADEFINITION)) {      
            if (page == null) {
                try {
                    page = new SchemaConfigurationPage(this);
                      ((SchemaConfigurationPage)page).setModel(_model);
                      addPage(SCHEMADEFINITION_PAGE_INDEX, page);
                } catch (PartInitException e) {                    
                }
            }          
        } else if (page != null) {           
            removePage(page.getIndex());
        }
  }

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    }


    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        if (!committing) {
            IFormPage page = (IFormPage) getManagedForm().getContainer();
            if (page.isActive()) {
                refresh();
            } else {
                markStale();
            }
        }

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                return true;
            }
        };


        IFormPage page = (IFormPage) getManagedForm().getContainer();
        IWorkbenchWindow window = page.getEditorSite().getWorkbenchWindow();


        // Prepare the package lister from the Java project
        IProject project = ResourceUtil.getResource(page.getEditorInput()).getProject();
        IJavaProject javaProject = JavaCore.create(project);


        IJavaSearchScope searchScope = SearchEngine.createJavaSearchScope(new IJavaElement[] {
            javaProject
        });

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        // Remove pages no longer required and remember the rest in a map
        int i = 0;
        Map<String,IFormPage> pageCache = new HashMap<String,IFormPage>(requiredPageIds.size());
        while (i < getPageCount()) {
            IFormPage current = (IFormPage) pages.get(i);
            if (!requiredPageIds.contains(current.getId()))
                removePage(i);
            else {
                pageCache.put(current.getId(), current);
                i++;
            }
        }


        // Cache new pages
        for (String pageId : requiredPageIds) {
            if (!pageCache.containsKey(pageId)) {
                IFormPage page = SOURCE_PAGE.equals(pageId) ? sourcePage : pageFactories.get(pageId).createPage(this, model, pageId);
                pageCache.put(pageId, page);
            }
        }


        // Add pages back in
        int requiredPointer = 0;
        int existingPointer = 0;


        while (requiredPointer < requiredPageIds.size()) {
            try {
                String requiredId = requiredPageIds.get(requiredPointer);
                if (existingPointer >= getPageCount()) {
                    if (SOURCE_PAGE.equals(requiredId))
                        addPage(sourcePage, getEditorInput());
                    else
                        addPage(pageCache.get(requiredId));
                } else {
                    IFormPage existingPage = (IFormPage) pages.get(existingPointer);
                    if (!requiredId.equals(existingPage.getId())) {
                        if (SOURCE_PAGE.equals(requiredId))
                            addPage(existingPointer, sourcePage, getEditorInput());
                        else
                            addPage(existingPointer, pageCache.get(requiredId));
                    }

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            this.saving.set(false);
        }
    }


    protected void ensurePageExists(String pageId, IFormPage page, int index) {
        IFormPage existingPage = findPage(pageId);
        if (existingPage != null)
            return;


        try {
            addPage(index, page);

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            ErrorDialog.openError(getSite().getShell(), "Error", null, new Status(IStatus.ERROR, Plugin.PLUGIN_ID, 0, "Error adding page to editor.", e));
        }
    }


    protected void removePage(String pageId) {
        IFormPage page = findPage(pageId);
        if (page != null) {
            removePage(page.getIndex());
        }
    }

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            selected = SOURCE_PAGE;
            selectedPrio = 0;
        }


        for (Object pageObj : pages) {
            IFormPage page = (IFormPage) pageObj;
            int priority = 0;
            if (page instanceof IPriority)
                priority = ((IPriority) page).getPriority();
            if (priority > selectedPrio) {
                selected = page.getId();
                selectedPrio = priority;
            }
        }


        if (selected != null)

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        this.model.addPropertyChangeListener(this);
    }


    public void propertyChange(PropertyChangeEvent evt) {
        if (editablePropertySet.contains(evt.getPropertyName())) {
            IFormPage page = (IFormPage) getManagedForm().getContainer();
            if (page.isActive()) {
                refresh();
            } else {
                markStale();
            }
        } else if (Constants.EXPORT_PACKAGE.equals(evt.getPropertyName()) || aQute.bnd.osgi.Constants.PRIVATE_PACKAGE.equals(evt.getPropertyName())) {

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        if (this.model != null)
            this.model.removePropertyChangeListener(this);
    }


    IJavaProject getJavaProject() {
        IFormPage formPage = (IFormPage) getManagedForm().getContainer();
        IFile file = ResourceUtil.getFile(formPage.getEditorInput());
        return file != null ? JavaCore.create(file.getProject()) : null;
    }

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            model.addPropertyChangeListener(propertyName, this);
        }
    }


    public void propertyChange(PropertyChangeEvent evt) {
        IFormPage page = (IFormPage) managedForm.getContainer();
        if (page.isActive())
            refresh();
        else
            markStale();
    }

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