/** 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();
}
