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Thread: QPlainTextEdit display large plain text

  1. #1
    Join Date
    Jan 2011
    Qt products

    Default QPlainTextEdit display large plain text


    In my application I take some data from a file, process it using QtConcurrent to a text format and at the end of QtConcurrent emit append signal to QPlainTextEdit.
    The problem is that the MainWindow becomes unresponsive, freezes when there is more than e.g. 20.000 lines. I have try to split the text into smaller chunks or append 1 line at a time but that did not help.

    Can anyone recommend me some way how can I avoid freezing of MainWindow in this situation ?
    Thanks in advance.

  2. #2
    Join Date
    Jan 2006
    Warsaw, Poland
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    Default Re: QPlainTextEdit display large plain text

    Use QTextCursor interface and make sure you manipulate the document from the main thread.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.

  3. The following user says thank you to wysota for this useful post:

    ArkKup (14th March 2013)

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