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Thread: Limit Amount of Text in a QTextEdit

  1. #1
    Join Date
    Dec 2009
    Qt products

    Default Limit Amount of Text in a QTextEdit

    I need to limit the amount of text in a QTextEdit so that the user can't go beyond the size of visible space, that is, no scrolling. If the user tries to do so, i need to emit a signal to post a limit message.

    Stopping scrolling leads to a very poor document response, both for the last line and the cursor. Limiting the number of blocks can not overcome long lines. Is there a good way to do this? Thanks.

  2. #2
    Join Date
    Jan 2009
    The Netherlands and Spain
    Thanked 18 Times in 18 Posts
    Qt products

    Default Re: Limit Amount of Text in a QTextEdit

    Take a look at
    QRect QPainter::boundingRect ( const QRect & rectangle, int flags, const QString & text )

    With that function you can check at every keyboard input of it will exceed your preferred size.

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