public void drop(DropTargetEvent event) {
DropTarget dropTarget = (DropTarget) event.getSource();
Item targetItem = (Item) event.item;
MetadataColumn targetColumn = null;
if (targetItem != null) {
targetColumn = (MetadataColumn) targetItem.getData();
}
if (targetColumn != null) {}
EList columns =
ConnectionHelper.getTables(connection).toArray(new MetadataTable[0])[0].getColumns();
int maxColumnsNumber =
CoreUIPlugin.getDefault()
.getPreferenceStore()
.getInt(ITalendCorePrefConstants.MAXIMUM_AMOUNT_OF_COLUMNS_FOR_XML);
if (columns.size() >= maxColumnsNumber) {
MessageDialog.openWarning(
treeViewer.getTree().getShell(),
"Columns Overflow",
"The amount of schema columns has reached the max value. Please increase the max value on Preference Page(/Talend/Metadata) if you want to add new columns.");
return;
}
Control control = dropTarget.getControl();
LocalDraggedData draggedData = LocalDataTransfer.getInstance().getDraggedData();
List<Object> transferableObjs = draggedData.getTransferableEntryList();
for (Object obj : transferableObjs) {
if (obj instanceof FOXTreeNode) {
FOXTreeNode treeNode = (FOXTreeNode) obj;
calcuAddedColumns(treeNode, targetColumn, columns);
}
}
tableViewer.setInput(columns);
tableViewer.refresh();
treeViewer.refresh();
Display display = tree.getDisplay();
Cursor cursor = new Cursor(display, SWT.CURSOR_WAIT);
tree.getShell().setCursor(cursor);
linker.valueChanged(targetItem);
tree.getShell().setCursor(null);
linker.updateLinksStyleAndControlsSelection(control, true);
linker.updateConnection();
linker.updateFormStatus();
}
public void dragStart(DragSourceEvent event) {
TreeItem[] items = tree.getSelection();
if (items.length == 0) {
event.doit = false;
} else {
boolean isHasChildren = false;
for (TreeItem treeItem : items) {
if (treeItem.getItemCount() > 0) {
isHasChildren = true;
break;
}
}
if (isHasChildren) {
event.doit = false;
} else {
LocalDraggedData draggedData = new LocalDraggedData();
for (TreeItem treeItem : items) {
draggedData.add(treeItem.getData());
}
LocalDataTransfer.getInstance().setLocalDraggedData(draggedData);
}
}
}