We've got an app with a complex hierarchy of widgets and I want to be able to browse this hierarchy, view and edit properties (such as size) in a similar manner to Spy++. It doesn't need to be running in an external app, if there is a widget that can display this information. So the question is, does such a mythical beast exist?
you can use Gammaray for spy Widget and signal slot and timers and resource and etc. Gammaray is very powerfull tool for spy Qt Application
The usual approach is to build such a beast in-house, using the introspection APIs, and walking the QWidget parent-child hierarchy. It's pretty easy to build a basic one; if you want to build a full property editor it's considerably more work. There's probably code you can re-use to reduce the work - possibly even the property inspector code from Designer, though it might be overkill. I've never gone as far as full GUI, due to time constraints - I've simply dumped the hierarchy and some fixed properties to stdout as text or XML.
I suppose it would be plausible to make a reusable GUI component out of this, that could be dropped into an arbitrary app, would look for top-level widgets, and allow everything to be inspected, if you have the time and inclination.
Not a browser, but useful in debugging...
void QObject::dumpObjectTree() const
Dumps a tree of children to the debug output.
来源：https://stackoverflow.com/questions/4041131/is-there-a-qt-widget-to-browse-the-hierarchy-of-widgets-in-an-app-similar-to-sp