Fixup : Testing and fixing CI

Author: elsazac

bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/StackRenderer.java

@@ -89,6 +89,8 @@
 import org.eclipse.swt.custom.CTabItem;
 import org.eclipse.swt.dnd.DND;
 import org.eclipse.swt.dnd.DropTarget;
+import org.eclipse.swt.dnd.TextTransfer;
+import org.eclipse.swt.dnd.Transfer;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.ControlListener;
 import org.eclipse.swt.events.MouseAdapter;
@@ -721,11 +723,21 @@ public Object createWidget(MUIElement element, Object parent) {
 		int styleOverride = getStyleOverride(pStack);
 		int style = styleOverride == -1 ? SWT.BORDER : styleOverride;
 		CTabFolder tabFolder = new CTabFolder(parentComposite, style);
+//		if (PartStackUtil.isEditorStack(element)) {
+//			createOnboardingControls(tabFolder);
+//			initializeOnboardingInformationInEditorStack(tabFolder);
+//			Shell shell = Display.getCurrent().getActiveShell();
+//			new DropTarget(shell, DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK);
+//		}
+
 		if (PartStackUtil.isEditorStack(element)) {
 			createOnboardingControls(tabFolder);
 			initializeOnboardingInformationInEditorStack(tabFolder);
-			Shell shell = Display.getCurrent().getActiveShell();
-			new DropTarget(shell, DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK);
+			Label dropLabel = new Label(tabFolder, SWT.NONE);
+			dropLabel.setText("Drop here"); //$NON-NLS-1$
+			int drop = DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK;
+			DropTarget target = new DropTarget(dropLabel, drop);
+			target.setTransfer(new Transfer[] { TextTransfer.getInstance() }); // or FileTransfer, etc.
 		}
 		tabFolder.setMRUVisible(getMRUValue());
 		// Adjust the minimum chars based on the location