Qt Clear Undo History in a QTextEdit/QPlainTextEdit?

喜你入骨 提交于 2019-12-05 17:20:55

Use QTextDocument::clearUndoRedoStacks. Code:

editor->document()->clearUndoRedoStacks(); // default clears both

See docs if you want to clear just undo. Also, it's good idea to read docs of QTextDocument (and QTextCursor) when working with the editor widgets. Lots of functionality is "hidden" there.

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