How to make changes in QTextDocument without creating undo item?

[EnErGy[CSDX]]

How to change QTextBlockFormat for particular blocks without pushing undo items to undostack?

[bunjee]

You can do so using QTextCursor.

[EnErGy[CSDX]]

each time when i do QTextCursor::setBlockFormat, undo item is pushed into document internal undo stack.

a lot of QTextCursor::setBlockFormat calls push a lot of undo, which should not be pushed.

[elcuco]

Look at QTextCursor::beginEditBlock()

[EnErGy[CSDX]]

QTextCursor::setBlockFormat should not change undo stack