Possibly what you want is to...
1. For each object having one of more dependent objects,
2. Open that object from the Connections view navigator tree.
3. From the object browser's toolbar, from the Actions drop-down list, select Export....
4. In the Export DDL section of the dialog, check-off the Dependents box
5. Then the export script should include all dependent objects.
Hope this helps,
SQL Developer Team