Example usage for org.eclipse.jface.viewers IStructuredSelection size

List of usage examples for org.eclipse.jface.viewers IStructuredSelection size

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Introduction

In this page you can find the example usage for org.eclipse.jface.viewers IStructuredSelection size.

Prototype

public int size();

Source Link

Document

Returns the number of elements selected in this selection.

Usage

From source file:aspectminingtool.views.Sinergia.ViewPartSinergia.java

License:Open Source License

/**
 * Create the actions./*from   www  .ja v  a 2 s. c o m*/
 */
public void createActions() {

    selectAllTableLeft = new Action("Select All") {
        public void run() {
            selectAll(tableViewerLeft);
        }
    };
    // Add selection listener.
    tableViewerLeft.addSelectionChangedListener(new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection sel = (IStructuredSelection) tableViewerLeft.getSelection();
            openActionTableLeft.setEnabled(sel.size() > 0);
            selectAllTableLeft.setEnabled(sel.size() > 0);
            selectAsSeedAction.setEnabled(sel.size() > 0);
        }
    });
}

From source file:aspectminingtool.views.UniqueMethods.ViewPartUniqueMethods.java

License:Open Source License

/**
 * Create the actions./*from  www .  j av a2  s.  c  om*/
 */
public void createActions() {

    selectAllActionMethodsTable = new Action("Select All") {
        public void run() {
            selectAll(tableViewerLeft);
        }
    };

    selectAllActionCallsTable = new Action("Select All") {
        public void run() {
            selectAll(tableViewerRight);
        }
    };

    // Add selection listener.
    tableViewerLeft.addSelectionChangedListener(new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection sel = (IStructuredSelection) tableViewerLeft.getSelection();
            openActionTableLeft.setEnabled(sel.size() > 0);
            selectAllActionMethodsTable.setEnabled(sel.size() > 0);
            selectAsSeedOperation.setEnabled(sel.size() > 0);
        }
    });

    tableViewerRight.addSelectionChangedListener(new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection sel = (IStructuredSelection) tableViewerLeft.getSelection();
            selectAllActionCallsTable.setEnabled(sel.size() > 0);
            openActionTableRight.setEnabled(sel.size() > 0);
        }
    });

}

From source file:at.bitandart.zoubek.mervin.comments.CommentsView.java

License:Open Source License

/**
 * extracts all EObject link targets from the given selection.
 * /*from w  w w  .ja  v  a 2 s. com*/
 * @param selection
 *            the selection containing the link targets.
 * @return a list of EObject link targets, does not return null.
 */
private List<EObject> extractLinkTargets(IStructuredSelection selection) {

    List<EObject> targets = new ArrayList<EObject>(selection.size());

    Iterator<?> iterator = selection.iterator();
    while (iterator.hasNext()) {

        Object element = iterator.next();
        if (element instanceof EObject) {

            targets.add((EObject) element);

        } else if (element instanceof GraphicalEditPart) {

            // GMF edit part -> use semantic model
            EObject semanticElement = ((GraphicalEditPart) element).resolveSemanticElement();
            targets.add(extractFromTemporaryContainer(semanticElement));

        } else if (element instanceof ConnectionEditPart) {

            // GMF edit part -> use semantic model
            EObject semanticElement = ((ConnectionEditPart) element).resolveSemanticElement();
            targets.add(extractFromTemporaryContainer(semanticElement));

        } else if (element instanceof EditPart) {

            // GEF edit part -> use model if it is an EObject
            Object model = ((EditPart) element).getModel();
            if (model instanceof EObject) {
                targets.add((EObject) model);
            }

        }

    }

    return targets;
}

From source file:at.bitandart.zoubek.mervin.property.diff.PropertyDiffView.java

License:Open Source License

/**
 * creates the input object for the tree diff viewer based on the given
 * selection./*from   w w w.  j a  va 2  s.c  om*/
 * 
 * @param selection
 *            the selection used to create the input object for.
 * @return the input object for the tree diff viewer.
 */
private Object createInputFromSelection(IStructuredSelection selection) {

    Comparison comparison = getComparison(selection);

    List<SelectionEntry> modelEntries = new ArrayList<>(selection.size());

    Iterator<?> selectionIterator = selection.iterator();
    int selectionIndex = 1;
    while (selectionIterator.hasNext()) {

        Object object = selectionIterator.next();
        EObject selectedSemanticModelElement = diagramModelHelper.getSemanticModel(object);
        View selectedNotationModelElement = diagramModelHelper.getNotationModel(object);

        ModelReview currentModelReview = getCurrentModelReview();
        if (currentModelReview != null) {

            View originalNotationModelElement = (View) currentModelReview.getUnifiedModelMap().inverse()
                    .get(selectedNotationModelElement);

            if (originalNotationModelElement != null) {
                selectedNotationModelElement = originalNotationModelElement;
            }
        }

        Match semanticModelMatch = comparison.getMatch(selectedSemanticModelElement);
        Match notationModelMatch = comparison.getMatch(selectedNotationModelElement);

        /*
         * create an entry only if the selection contains a model element
         * contained in the comparison
         */
        if (semanticModelMatch != null || notationModelMatch != null) {
            SelectionEntry modelEntry = new SelectionEntry("#" + selectionIndex, semanticModelMatch,
                    notationModelMatch);
            modelEntries.add(modelEntry);

            // TODO add other (referencing, context, etc...) notation models

            selectionIndex++;
        }

    }

    return modelEntries;
}

From source file:at.medevit.menus.parts.SelectorPart.java

License:Open Source License

/**
 * Create contents of the view part./* ww  w.j a  va 2s.  c om*/
 */
@PostConstruct
public void createControls(Composite parent) {
    parent.setLayout(new GridLayout(1, false));

    // -- person selector
    Label lblPerson = new Label(parent, SWT.NONE);
    lblPerson.setText("Person");

    Composite composite = new Composite(parent, SWT.NONE);
    composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
    composite.setLayout(new TableColumnLayout());

    selectPersonTV = new TableViewer(composite, SWT.BORDER | SWT.FULL_SELECTION);
    selectPersonTV.setLabelProvider(new AdapterFactoryLabelProvider(mipaf));
    selectPersonTV.setContentProvider(new AdapterFactoryContentProvider(mipaf));
    selectPersonTV.setInput(SampleModel.getDirectory());
    selectPersonTV.addSelectionChangedListener(new ISelectionChangedListener() {
        @Override
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();

            Person p = (Person) selection.getFirstElement();

            selectionService.setSelection(selection.size() == 1 ? p : selection.toArray());

            if (selection.size() == 1) {
                if (p.getPartner() != null) {
                    partnerPersonTV.setSelection(new StructuredSelection(p.getPartner()));
                } else {
                    partnerPersonTV.setSelection(null);
                }
            }
        }
    });
    ViewerFilter[] filters = new ViewerFilter[] { new PersonViewerFilter(selectPersonTV) };
    selectPersonTV.setFilters(filters);

    menuService.registerContextMenu(selectPersonTV.getTable(), SELECTOR_POPUPMENU_ID);

    // -- partner selector
    Label lblPartner = new Label(parent, SWT.NONE);
    lblPartner.setText("Partner");

    Composite composite2 = new Composite(parent, SWT.NONE);
    composite2.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
    composite2.setLayout(new TableColumnLayout());

    partnerPersonTV = new TableViewer(composite2, SWT.BORDER | SWT.FULL_SELECTION);
    partnerPersonTV.setLabelProvider(new AdapterFactoryLabelProvider(mipaf));
    partnerPersonTV.setContentProvider(new AdapterFactoryContentProvider(mipaf));
    partnerPersonTV.setInput(SampleModel.getDirectory());

}

From source file:at.spardat.xma.guidesign.presentation.action.GuidesignActionBarContributor.java

License:Open Source License

/**
 * This implements {@link ISelectionChangedListener},
 * handling {@link SelectionChangedEvents} by querying for the children and siblings
 * that can be added to the selected object and updating the menus accordingly.
 * <!-- begin-user-doc -->//from ww w. j  ava 2  s .  c  om
 * <!-- end-user-doc -->
 * @generated
 */
public void selectionChanged(SelectionChangedEvent event) {
    // Remove any menu items for old selection.
    //
    if (createChildMenuManager != null) {
        depopulateManager(createChildMenuManager, createChildActions);
    }
    if (createSiblingMenuManager != null) {
        depopulateManager(createSiblingMenuManager, createSiblingActions);
    }
    if (editMenuManager != null) {
        depopulateManager(editMenuManager, editActions);
    }
    // Query the new selection for appropriate new child/sibling descriptors
    //
    Collection newChildDescriptors = null;
    Collection newSiblingDescriptors = null;

    Object object = null;
    ISelection selection = event.getSelection();
    if (selection instanceof IStructuredSelection) {
        IStructuredSelection structSels = (IStructuredSelection) selection;
        if (structSels.size() == 1) {
            object = ((IStructuredSelection) selection).getFirstElement();
            EditingDomain domain = ((IEditingDomainProvider) activeEditorPart).getEditingDomain();
            newChildDescriptors = domain.getNewChildDescriptors(object, null);
            newSiblingDescriptors = domain.getNewChildDescriptors(null, object);
        }
        //create edit actions
        editActions = generateEditActions(structSels);
    }

    // Generate actions for selection; populate and redraw the menus.
    //
    createChildActions = generateCreateChildActions(newChildDescriptors, selection);
    createSiblingActions = generateCreateSiblingActions(newSiblingDescriptors, selection);

    if (createChildMenuManager != null) {
        populateManager(createChildMenuManager, createChildActions, null);
        createChildMenuManager.update(true);
    }
    if (createSiblingMenuManager != null) {
        populateManager(createSiblingMenuManager, createSiblingActions, null);
        createSiblingMenuManager.update(true);
    }

    if (editMenuManager != null) {
        populateManager(editMenuManager, editActions, null);
        editMenuManager.update(true);
    }
}

From source file:au.gov.ga.earthsci.application.handlers.ShowViewDialog.java

License:Apache License

@Override
protected Control createDialogArea(Composite parent) {
    Composite composite = (Composite) super.createDialogArea(parent);
    composite.setLayout(new FillLayout());

    TableViewer viewer = new TableViewer(composite, SWT.NONE);
    viewer.setContentProvider(new ArrayContentProvider());
    viewer.setLabelProvider(new PartLabelProvider());

    //TODO this part collection is simply a list of parts that have been shown before
    //need to improve this collection so that it removes duplicates, and also contains
    //parts that are registered but have never been displayed
    viewer.setInput(application.getDescriptors());

    viewer.addSelectionChangedListener(new ISelectionChangedListener() {
        @Override/* w w w .java2 s  .  c  o  m*/
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection s = (IStructuredSelection) event.getSelection();
            selection = new MPartDescriptor[s.size()];
            Iterator<?> iterator = s.iterator();
            for (int i = 0; iterator.hasNext(); i++) {
                MPartDescriptor part = (MPartDescriptor) iterator.next();
                selection[i++] = part;
            }
        }
    });

    return composite;
}

From source file:au.gov.ga.earthsci.application.parts.layer.LayerTreePart.java

License:Apache License

@PostConstruct
public void init(Composite parent, EMenuService menuService) {
    LayerOpacityToolControl.setPartContext(context);

    viewer = new CheckboxTreeViewer(parent, SWT.MULTI);
    viewer.getTree().setBackgroundImage(ImageRegistry.getInstance().get(ImageRegistry.ICON_TRANSPARENT));
    context.set(TreeViewer.class, viewer);

    clipboard = new Clipboard(shell.getDisplay());
    context.set(Clipboard.class, clipboard);

    IListProperty childrenProperty = new MultiListProperty(
            new IListProperty[] { BeanProperties.list("children") }); //$NON-NLS-1$

    ObservableListTreeContentProvider contentProvider = new ObservableListTreeContentProvider(
            childrenProperty.listFactory(), null);
    viewer.setContentProvider(contentProvider);

    //TreeViewerEditor.create(viewer, new SecondClickColumnViewerEditorActivationStrategy(viewer), ColumnViewerEditor.DEFAULT);

    IObservableSet knownElements = contentProvider.getKnownElements();
    IObservableMap enabledMap = BeanProperties.value("enabled").observeDetail(knownElements); //$NON-NLS-1$
    IObservableMap opacityMap = BeanProperties.value("opacity").observeDetail(knownElements); //$NON-NLS-1$
    IObservableMap nameMap = BeanProperties.value("name").observeDetail(knownElements); //$NON-NLS-1$
    IObservableMap labelMap = BeanProperties.value("label").observeDetail(knownElements); //$NON-NLS-1$
    IObservableMap statusMap = BeanProperties.value("status").observeDetail(knownElements); //$NON-NLS-1$
    IObservableMap anyChildrenEnabledMap = BeanProperties.value("anyChildrenEnabled") //$NON-NLS-1$
            .observeDetail(knownElements);
    IObservableMap allChildrenEnabledMap = BeanProperties.value("allChildrenEnabled") //$NON-NLS-1$
            .observeDetail(knownElements);
    IObservableMap childrenMap = BeanProperties.value("children").observeDetail(knownElements); //$NON-NLS-1$
    IObservableMap expandedMap = BeanProperties.value("expanded").observeDetail(knownElements); //$NON-NLS-1$

    IObservableMap[] labelAttributeMaps = new IObservableMap[] { enabledMap, opacityMap, nameMap, labelMap,
            anyChildrenEnabledMap, allChildrenEnabledMap, statusMap };

    labelProvider = new LayerTreeLabelProvider(labelAttributeMaps);
    viewer.setLabelProvider(labelProvider);
    viewer.setCheckStateProvider(new LayerTreeCheckStateProvider());

    viewer.setInput(model.getRootNode());
    viewer.setExpandedElements(getExpandedNodes());

    IMapChangeListener childrenListener = new IMapChangeListener() {
        @Override//from   w  w  w .j  a  va2 s.  c  o  m
        public void handleMapChange(MapChangeEvent event) {
            //for any children added, expand the nodes
            Set<?> addedKeys = event.diff.getAddedKeys();
            for (Object o : addedKeys) {
                if (o instanceof ILayerTreeNode) {
                    ((ILayerTreeNode) o).getParent().getValue().setExpanded(true);
                }
            }
        }
    };
    IMapChangeListener expandedListener = new IMapChangeListener() {
        @Override
        public void handleMapChange(MapChangeEvent event) {
            //ensure the expanded elements are kept in sync with the model
            viewer.getTree().getDisplay().asyncExec(new Runnable() {
                @Override
                public void run() {
                    if (!viewer.getTree().isDisposed()) {
                        viewer.setExpandedElements(getExpandedNodes());
                    }
                }
            });
        }
    };
    childrenMap.addMapChangeListener(childrenListener);
    childrenMap.addMapChangeListener(expandedListener);
    expandedMap.addMapChangeListener(expandedListener);

    viewer.addCheckStateListener(new ICheckStateListener() {
        @Override
        public void checkStateChanged(CheckStateChangedEvent event) {
            Object element = event.getElement();
            if (element instanceof ILayerTreeNode) {
                ILayerTreeNode node = (ILayerTreeNode) element;
                node.enableChildren(event.getChecked());
            }
        }
    });

    viewer.addSelectionChangedListener(new ISelectionChangedListener() {
        @Override
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
            List<?> list = selection.toList();
            ILayerTreeNode[] array = list.toArray(new ILayerTreeNode[list.size()]);
            selectionService.setSelection(array.length == 1 ? array[0] : array);
        }
    });

    viewer.addTreeListener(new ITreeViewerListener() {
        @Override
        public void treeExpanded(TreeExpansionEvent event) {
            ILayerTreeNode layerNode = (ILayerTreeNode) event.getElement();
            layerNode.setExpanded(true);
        }

        @Override
        public void treeCollapsed(TreeExpansionEvent event) {
            ILayerTreeNode layerNode = (ILayerTreeNode) event.getElement();
            layerNode.setExpanded(false);
        }
    });

    viewer.getTree().addMouseListener(new MouseAdapter() {
        @Override
        public void mouseDoubleClick(MouseEvent e) {
            ViewerCell cell = viewer.getCell(new Point(e.x, e.y));
            if (cell == null)
                return;

            ILayerTreeNode layer = (ILayerTreeNode) cell.getElement();
            selectLayer(layer);
        }

        @Override
        public void mouseDown(MouseEvent e) {
            ViewerCell cell = viewer.getCell(new Point(e.x, e.y));
            if (cell == null) {
                viewer.setSelection(StructuredSelection.EMPTY);
            }
        }
    });

    viewer.getTree().addTraverseListener(new TraverseListener() {
        @Override
        public void keyTraversed(TraverseEvent e) {
            if (e.detail == SWT.TRAVERSE_RETURN) {
                IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
                if (selection.size() == 1) {
                    ILayerTreeNode layer = (ILayerTreeNode) selection.getFirstElement();
                    selectLayer(layer);
                }
            }
        }
    });

    viewer.setCellEditors(new CellEditor[] { new TextCellEditor(viewer.getTree(), SWT.BORDER) });
    viewer.setColumnProperties(new String[] { "layer" }); //$NON-NLS-1$

    viewer.setCellModifier(new ICellModifier() {
        @Override
        public void modify(Object element, String property, Object value) {
            if (element instanceof Item) {
                element = ((Item) element).getData();
            }
            ((ILayerTreeNode) element).setLabel((String) value);
        }

        @Override
        public Object getValue(Object element, String property) {
            if (element instanceof Item) {
                element = ((Item) element).getData();
            }
            return ((ILayerTreeNode) element).getLabelOrName();
        }

        @Override
        public boolean canModify(Object element, String property) {
            return true;
        }
    });

    ColumnViewerEditorActivationStrategy activationStrategy = new ColumnViewerEditorActivationStrategy(viewer) {
        @Override
        protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) {
            return event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
        }
    };
    TreeViewerEditor.create(viewer, activationStrategy, ColumnViewerEditor.KEYBOARD_ACTIVATION);

    //add drag and drop support
    int ops = DND.DROP_COPY | DND.DROP_MOVE;
    viewer.addDragSupport(ops, new Transfer[] { LayerTransfer.getInstance() },
            new LayerTreeDragSourceListener(viewer));
    viewer.addDropSupport(ops, new Transfer[] { LayerTransfer.getInstance(), FileTransfer.getInstance() },
            new LayerTreeDropAdapter(viewer, model, context));

    //add context menu
    menuService.registerContextMenu(viewer.getTree(), "au.gov.ga.earthsci.application.layertree.popupmenu"); //$NON-NLS-1$
}

From source file:bndtools.editor.components.ComponentDetailsPage.java

License:Open Source License

void fillReferenceSection(FormToolkit toolkit, Section section) {

    ToolBar toolbar = new ToolBar(section, SWT.FLAT);
    section.setTextClient(toolbar);//from  w  w  w  .j  a va  2 s .co  m

    final ToolItem addItem = new ToolItem(toolbar, SWT.PUSH);
    addItem.setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_ADD));

    final ToolItem editItem = new ToolItem(toolbar, SWT.PUSH);
    editItem.setImage(imgEdit);
    editItem.setToolTipText("Edit");
    editItem.setEnabled(false);

    final ToolItem removeItem = new ToolItem(toolbar, SWT.PUSH);
    removeItem.setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_TOOL_DELETE));
    removeItem.setDisabledImage(
            PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_TOOL_DELETE_DISABLED));
    removeItem.setToolTipText("Remove");
    removeItem.setEnabled(false);

    Composite composite = toolkit.createComposite(section);
    section.setClient(composite);

    tableReferences = toolkit.createTable(composite, SWT.FULL_SELECTION | SWT.MULTI | SWT.BORDER);
    tableReferences.setHeaderVisible(true);
    tableReferences.setLinesVisible(false);

    TableColumn col;
    col = new TableColumn(tableReferences, SWT.NONE);
    col.setWidth(100);
    col.setText("Name");

    col = new TableColumn(tableReferences, SWT.NONE);
    col.setWidth(200);
    col.setText("Interface");

    col = new TableColumn(tableReferences, SWT.NONE);
    col.setWidth(35);
    col.setText("Card.");

    col = new TableColumn(tableReferences, SWT.NONE);
    col.setWidth(100);
    col.setText("Target");

    viewerReferences = new TableViewer(tableReferences);
    viewerReferences.setContentProvider(new ArrayContentProvider());
    viewerReferences.setLabelProvider(new ComponentSvcRefTableLabelProvider());

    // Listeners
    viewerReferences.addSelectionChangedListener(new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) viewerReferences.getSelection();
            editItem.setEnabled(selection.size() == 1);
            removeItem.setEnabled(!selection.isEmpty());
        }
    });
    addItem.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            doAddReference();
        };
    });
    editItem.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            doEditReference();
        };
    });
    removeItem.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            doRemoveReference();
        }
    });

    // Layout
    GridData gd;
    GridLayout layout;

    layout = new GridLayout(1, false);
    layout.verticalSpacing = 5;
    layout.horizontalSpacing = 0;
    layout.marginWidth = 0;
    layout.marginHeight = 0;
    composite.setLayout(layout);

    gd = new GridData(SWT.FILL, SWT.FILL, true, false, 1, 3);
    gd.widthHint = 250;
    gd.heightHint = 70;
    tableReferences.setLayoutData(gd);
}

From source file:bndtools.editor.components.ComponentListPart.java

License:Open Source License

void createSection(Section section, FormToolkit toolkit) {
    section.setText(Messages.ComponentListPart_listSectionTitle);

    Composite composite = toolkit.createComposite(section);
    section.setClient(composite);//from  ww w  . jav a  2  s . co m

    table = toolkit.createTable(composite, SWT.MULTI | SWT.FULL_SELECTION | SWT.BORDER);

    viewer = new TableViewer(table);
    viewer.setUseHashlookup(true);
    viewer.setContentProvider(new ArrayContentProvider());
    viewer.setLabelProvider(new ServiceComponentLabelProvider());

    final Button btnAdd = toolkit.createButton(composite, Messages.ComponentListPart_addButton, SWT.PUSH);
    final Button btnRemove = toolkit.createButton(composite, Messages.ComponentListPart_RemoveButton, SWT.PUSH);

    toolkit.paintBordersFor(section);

    // Listeners
    viewer.addSelectionChangedListener(new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            ArrayList<ServiceComponent> selectedComponents = new ArrayList<ServiceComponent>(selection.size());

            @SuppressWarnings("rawtypes")
            Iterator iterator = selection.iterator();
            while (iterator.hasNext()) {
                String name = (String) iterator.next();
                ServiceComponent component = componentMap.get(name);
                if (component != null)
                    selectedComponents.add(component);
            }

            managedForm.fireSelectionChanged(ComponentListPart.this,
                    new StructuredSelection(selectedComponents));
            btnRemove.setEnabled(!selection.isEmpty());
        }
    });
    viewer.addOpenListener(new IOpenListener() {
        public void open(OpenEvent event) {
            String name = (String) ((IStructuredSelection) event.getSelection()).getFirstElement();
            if (name != null) {
                doOpenComponent(name);
            }
        }
    });
    viewer.addDropSupport(DND.DROP_COPY | DND.DROP_MOVE, new Transfer[] { ResourceTransfer.getInstance() },
            new ComponentListDropAdapter(viewer));
    btnAdd.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            try {
                doAdd();
            } catch (Exception x) {
                Plugin.logError("Error adding component", x);
            }
        }
    });
    btnRemove.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            doRemove();
        }
    });

    // Layout
    GridData gd;
    section.setLayoutData(new GridData(GridData.FILL_BOTH));
    composite.setLayout(new GridLayout(2, false));
    gd = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 3);
    gd.widthHint = 250;
    table.setLayoutData(gd);
    btnAdd.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false));
    btnRemove.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false));
}