qt - How to program scrollbar to jump to bottom/top in case of change in QPlainTextEdit or QTextEdit area?

Question

How to program scrollbar to jump to bottom/top in case of change in QPlainTextEdit or QTextEdit area? It looks like it doesn't have any controlling function.

Answer 1

QTextEdit and QPlainTextEdit are both inherited from QAbstractScrollArea. The QAbstractScrollArea object provides access to the scrollbar through the verticalScrollBar() method.

Thus, to jump to the top:

ui.textEdit->verticalScrollBar()->setValue(0);

And to jump to the bottom:

ui.textEdit->verticalScrollBar()->setValue(ui.textEdit->verticalScrollBar()->maximum());

This should work for both QTextEdit and QPlainTextEdit.