/** Returns the data to be transferred in a drag and drop operation. */ @Override public void dragSetData(DragSourceEvent event) { if (event.doit == false) return; if (ModelDataTransfer.getInstance().isSupportedType(event.dataType)) { event.data = getSelectedModelObjects(); fDragData = event.data; return; } if (TextTransfer.getInstance().isSupportedType(event.dataType)) { event.data = createTextualRepresentation((IStructuredSelection) fSelectionProvider.getSelection()); fDragData = null; return; } }
/* * (non-Javadoc) * * @see org.eclipse.update.ui.forms.internal.FormSection#createClient(org.eclipse.swt.widgets.Composite, * org.eclipse.update.ui.forms.internal.FormWidgetFactory) */ public void createClient(Section section, FormToolkit toolkit) { fModel = (ISiteModel) getPage().getModel(); fModel.addModelChangedListener(this); Composite container = createClientContainer(section, 2, toolkit); createViewerPartControl(container, SWT.MULTI, 2, toolkit); fCategoryTreePart = getTreePart(); fCategoryViewer = fCategoryTreePart.getTreeViewer(); fCategoryViewer.setContentProvider(new CategoryContentProvider()); fSiteLabelProvider = new SiteLabelProvider(); fCategoryViewer.setLabelProvider(fSiteLabelProvider); fCategoryViewer.setInput(fModel.getSite()); int ops = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_DEFAULT; Transfer[] transfers = new Transfer[] {ModelDataTransfer.getInstance()}; if (isEditable()) { fCategoryViewer.addDropSupport( ops, transfers, new ViewerDropAdapter(fCategoryViewer) { public void dragEnter(DropTargetEvent event) { Object target = determineTarget(event); if (target == null && event.detail == DND.DROP_COPY) { event.detail = DND.DROP_MOVE; } super.dragEnter(event); } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.ViewerDropAdapter#dragOperationChanged(org.eclipse.swt.dnd.DropTargetEvent) */ public void dragOperationChanged(DropTargetEvent event) { Object target = determineTarget(event); if (target == null && event.detail == DND.DROP_COPY) { event.detail = DND.DROP_MOVE; } super.dragOperationChanged(event); } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.ViewerDropAdapter#dragOver(org.eclipse.swt.dnd.DropTargetEvent) */ public void dragOver(DropTargetEvent event) { Object target = determineTarget(event); if (target == null && event.detail == DND.DROP_COPY) { event.detail = DND.DROP_MOVE; } super.dragOver(event); } /** * Returns the position of the given event's coordinates relative to its target. The * position is determined to be before, after, or on the item, based on some threshold * value. * * @param event the event * @return one of the <code>LOCATION_* </code> constants defined in this class */ protected int determineLocation(DropTargetEvent event) { if (!(event.item instanceof Item)) { return LOCATION_NONE; } Item item = (Item) event.item; Point coordinates = new Point(event.x, event.y); coordinates = getViewer().getControl().toControl(coordinates); if (item != null) { Rectangle bounds = getBounds(item); if (bounds == null) { return LOCATION_NONE; } } return LOCATION_ON; } public boolean performDrop(Object data) { if (!(data instanceof Object[])) return false; Object target = getCurrentTarget(); int op = getCurrentOperation(); Object[] objects = (Object[]) data; if (objects.length > 0 && objects[0] instanceof SiteFeatureAdapter) { if (op == DND.DROP_COPY && target != null) { copyFeature((SiteFeatureAdapter) objects[0], target); } else { moveFeature((SiteFeatureAdapter) objects[0], target); } return true; } return false; } public boolean validateDrop(Object target, int operation, TransferData transferType) { return (target instanceof ISiteCategoryDefinition || target == null); } }); } fCategoryViewer.addDragSupport( DND.DROP_MOVE | DND.DROP_COPY, transfers, new DragSourceListener() { public void dragStart(DragSourceEvent event) { IStructuredSelection ssel = (IStructuredSelection) fCategoryViewer.getSelection(); if (ssel == null || ssel.isEmpty() || !(ssel.getFirstElement() instanceof SiteFeatureAdapter)) { event.doit = false; } } public void dragSetData(DragSourceEvent event) { IStructuredSelection ssel = (IStructuredSelection) fCategoryViewer.getSelection(); event.data = ssel.toArray(); } public void dragFinished(DragSourceEvent event) {} }); fCategoryTreePart.setButtonEnabled(BUTTON_ADD_CATEGORY, isEditable()); fCategoryTreePart.setButtonEnabled(BUTTON_ADD_FEATURE, isEditable()); fCategoryTreePart.setButtonEnabled(BUTTON_BUILD_FEATURE, isEditable()); fCategoryTreePart.setButtonEnabled(BUTTON_BUILD_ALL, isEditable()); // fCategoryViewer.expandAll(); toolkit.paintBordersFor(container); section.setClient(container); initialize(); }