Java 类org.eclipse.gef.SelectionManager 实例源码

/**
 * Given and edit part model, we want to expand the selection to
 * include all the edit parts that reference that model, as well
 * as query the edit part for additional selections
 */
@Override
@SuppressWarnings("unchecked")
public void appendSelection(EditPart ep) {
    super.appendSelection(ep);
    Set<Object> models = new LinkedHashSet<Object>();
    models.add(ep.getModel());
    SelectionManager selectionManager = getSelectionManager();
    for (Object o : ((IStructuredSelection)selectionManager.getSelection()).toArray()) {
        models.add(((EditPart)o).getModel());
    }
    Set<EditPart> editParts = new LinkedHashSet<EditPart>(getSelectableEditParts(models));
    ISelection epSelection = CommonUtils.getAdapter(ep, ISelection.class);
    if (epSelection != null) {
        editParts.remove(ep);
        editParts.addAll(((IStructuredSelection)epSelection).toList());
    } else {
        editParts.remove(ep); // move the primary selection to the end of the list
        editParts.add(ep);
    }
    selectionManager.setSelection(new StructuredSelection(editParts.toArray(new EditPart[0])));
}

/**
 * @see EditPartViewer#setSelectionManager(SelectionManager)
 */
public void setSelectionManager(SelectionManager model) {
    Assert.isNotNull(model);
    if (selectionModel != null)
        selectionModel.internalUninstall();
    selectionModel = model;
    model.internalInitialize(this, selection, new Runnable() {
        public void run() {
            fireSelectionChanged();
        }
    });
    if (getControl() != null)
        model.internalHookControl(getControl());
}

private void setSelectedDefault() {
    final SelectionManager lSelectionManager = viewer.getSelectionManager();
    if (model == null) {
        lSelectionManager.setSelection(StructuredSelection.EMPTY);
    } else {
        selectedObject = (ItemEditPart) viewer.getEditPartRegistry().get(model.getCenter());
        lSelectionManager.setSelection(new StructuredSelection(selectedObject));
    }
}

@Override
public void selectionChanged(final SelectionChangedEvent inEvent) {
    if (isSelectionChangeHandling()) {
        endSelectionChangeHandling();
        return;
    }
    if (inEvent.getSelection().isEmpty()) {
        return;
    }

    // prevent multi selection by deselecting all selected items except
    // the last
    final SelectionManager lManager = viewer.getSelectionManager();
    final Object[] lSelections = ((IStructuredSelection) inEvent.getSelection()).toArray();
    for (int i = 0; i < lSelections.length - 1; i++) {
        if (lSelections[i] instanceof EditPart) {
            lManager.deselect((EditPart) lSelections[i]);
        }
    }

    final Object lSelection = lSelections[lSelections.length - 1];
    if (lSelection instanceof ItemEditPart) {
        if (model != null) {
            selectedObject = (ItemEditPart) lSelection;
            eventBroker.post(RelationsConstants.TOPIC_TO_BROWSER_MANAGER_SET_SELECTED,
                    new SelectedItemChangeEvent((ItemAdapter) selectedObject.getModel(),
                            DefaultBrowserPart.this));
        }
    }
    if (lSelection instanceof RelationEditPart) {
        eventBroker.post(RelationsConstants.TOPIC_TO_BROWSER_MANAGER_SET_SELECTED,
                ((RelationEditPart) lSelection).getModel());
    }

    if (lSelection instanceof RelationsEditPart) {
        // this ensures that clicking the background doesn't deselect
        // the selected object
        lManager.setSelection(new StructuredSelection(selectedObject));
    }
}

@Override
@SuppressWarnings("unchecked")
public void doPropertyChange(PropertyChangeEvent event) {
    if ("consumed".equals(event.getPropagationId())) {
        return;
    }
    if (event.getPropertyName().equals(DiagramWalkerSet.PROPERTY_CHANGE_DIAGRAM_WALKER)) {
        refreshChildren();
    } else if (event.getPropertyName().equals(ERVirtualDiagram.PROPERTY_CHANGE_VTABLES)) {
        refresh();
        refreshRelations();
    } else if (event.getPropertyName().equals(ERDiagram.PROPERTY_CHANGE_ALL)) {
        refresh();
        refreshRelations();
        final List<DiagramWalker> nodeElementList = (List<DiagramWalker>) event.getNewValue();
        if (nodeElementList != null) {
            getViewer().deselectAll();
            final SelectionManager selectionManager = getViewer().getSelectionManager();
            final Map<DiagramWalker, EditPart> modelToEditPart = getModelToEditPart();
            for (final DiagramWalker walker : nodeElementList) {
                selectionManager.appendSelection(modelToEditPart.get(walker));
            }
        }
    } else if (event.getPropertyName().equals(ERDiagram.PROPERTY_CHANGE_ADD)) {
        final Object newValue = event.getNewValue();
        if (newValue instanceof ERVirtualDiagram) {
            refresh();
            refreshVisuals();
        }
    } else if (event.getPropertyName().equals(ERDiagram.PROPERTY_CHANGE_TABLE)) {
        final TableView newTable = (TableView) event.getNewValue();
        internalRefreshTable(newTable);
    } else if (event.getPropertyName().equals(ViewableModel.PROPERTY_CHANGE_COLOR)) {
        refreshVisuals();
    } else if (event.getPropertyName().equals(ERDiagram.PROPERTY_CHANGE_DATABASE)) {
        changeDatabase(event);
    } else if (event.getPropertyName().equals(ERDiagramPropertySource.PROPERTY_INIT_DATABASE)) {
        final ERDiagram diagram = (ERDiagram) getModel();
        diagram.restoreDatabase(DBManagerFactory.getAllDBList().get(0));
    } else if (event.getPropertyName().equals(ERDiagram.PROPERTY_CHANGE_SETTINGS)) {
        changeSettings();
    }
}

/**
 * Constructs the viewer and calls {@link #init()}.
 */
public AbstractEditPartViewer() {
    setSelectionManager(SelectionManager.createDefault());
    init();
}

/**
 * @see EditPartViewer#getSelectionManager()
 */
public SelectionManager getSelectionManager() {
    return selectionModel;
}