Nothing appears in QScrollArea

The following code appears in a custom dialog constructor:

Code:

---

layout = QVBoxLayout()
 
watcher = DWatcher(None, DProperties({'value':settings}))
 
scroller = QScrollArea()
scroller.setWidget(watcher)
layout.addWidget(scroller)
 
layout2 = QHBoxLayout()
layout2.addWidget(QPushButton('OK'))
layout2.addWidget(QPushButton('Cancel'))
layout.addItem(layout2)
 
self.setLayout(layout)

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When the dialog appears, there is nothing in the scrollarea. DWatcher has a layout after its constructor exits. If I simply add the DWatcher, it works just like it's supposed to, but it can be really big so I want it in a scrollarea. Any ideas how this might happen?

From documentation:

Quote:

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If the scroll area is visible when the widget is added, you must show() it explicitly.
Note that You must add the layout of widget before you call this function (setWidget()); if you add it later, the widget will not be visible - regardless of when you show() the scroll area. In this case, you can also not show() the widget later

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Maybe the second line is your reason?