I apologize for my English, since this first message in English.

There's a certain analog of the playlist in a videowidget.
Qt Code: 
  1. scrollArea = new QScrollArea(); 
  2. scrollAreaWidgetContents = new QWidget(); 
  3. scrollArea->setWidget(scrollAreaWidgetContents);
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After that I add in layout of scrollAreaWidgetContents (QVBoxLayout) many widgets.
How to do so that QScrollArea it was scrolled to necessary to me widget?

While I do so:
Qt Code: 
  1. MyWidget *selectedWidget = findWidget(id); 
  2. selectedWidget->mark(); 
  3. _ui->scrollArea->ensureWidgetVisible(selectedWidget , 0, 0);
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After that necessary widget became selected (after mark()), but QScrollArea to it it was not scrolled.