KAdjustingScrollArea Class

Detailed Description

This widget improves a few aspects of QScrollArea in particular, for vertically scrollable widgets and dialogs.

If sizeAdjustPolicy is set to QAbstractScrollArea::AdjustToContents, then the scroll area will (try to) adjust its size to the widget to avoid scroll bars as much as possible.

In particular, this widget will automatically increase the height of its window when the content of the scroll area grows in height (e.g. because more widgets are added dynamically). The automatic resizing stops at 2/3 of the screen's height.

Instead of setting the scrollarea's content via QScrollArea::setWidget, add the child widgets to the QVBoxLayout of the scrollarea's widget.

auto scrollArea = new KAdjustingScrollArea(this);
scrollArea->setSizeAdjustPolicy(QScrollArea::AdjustToContents);
scrollArea->setFocusPolicy(Qt::NoFocus);
scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
scrollArea->setWidget(new QWidget);

auto scrollAreaLayout = new QVBoxLayout(scrollArea->widget());