QPlainTextEdit或QTextEdit区域更改时，如何编程滚动条跳到底部/顶部? [英] How to program scrollbar to jump to bottom/top in case of change in QPlainTextEdit or QTextEdit area?

问题描述

如果QPlainTextEdit或QTextEdit区域发生更改，如何编程滚动条以跳到底部/顶部? 看起来它没有任何控制功能.

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.

推荐答案

QTextEdit和QPlainTextEdit都继承自QAbstractScrollArea. QAbstractScrollArea对象通过verticalScrollBar()方法提供对滚动条的访问.

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

因此，跳到顶部:

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

并跳到底部:

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

这同时适用于QTextEdit和QPlainTextEdit.

This should work for both QTextEdit and QPlainTextEdit.

这篇关于QPlainTextEdit或QTextEdit区域更改时，如何编程滚动条跳到底部/顶部?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！