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Thread: File size limitation in qt

  1. #1
    Join Date
    Oct 2014
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    Question File size limitation in qt

    I have a text file size of 3.33MB which i need to render in the text browser. But only 1MB of text file data is read and rendered.
    It would be helpfull i could know the text file size limit to render in qt.

    I am using the following code.

    Qt Code:
    1. #include "file.h"
    2. #include "ui_file.h"
    3. #include<QFile>
    4. #include<QTextStream>
    5. #include<QMessageBox>
    6.  
    7. file::file(QWidget *parent) :
    8. QMainWindow(parent),
    9. ui(new Ui::file)
    10. {
    11. ui->setupUi(this);
    12. }
    13.  
    14. file::~file()
    15. {
    16. delete ui;
    17. }
    18.  
    19. void file::on_pushButton_clicked()
    20. {
    21. QFile file ("D:\\Users\\aisu1452\\Thales_db_frgbsa9.pc");
    22.  
    23. if(!file.open(QIODevice :: ReadOnly))
    24. {
    25. QMessageBox :: information(0,"info", file.errorString());
    26. }
    27. else
    28. {
    29. QTextStream in (&file);
    30. ui->textBrowser->setText(in.readAll());
    31. }
    32.  
    33. }
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    Last edited by wysota; 20th October 2014 at 09:04. Reason: missing [code] tags

  2. #2
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    Default Re: File size limitation in qt

    There is no "text file size limit" in Qt.
    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. #3
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    Default Re: File size limitation in qt

    Have you tried QTextBrowser::setSource() to let the widget load the document as it sees fit, instead of loading the whole contents in RAM?

  4. #4
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    Default Re: File size limitation in qt

    If your text file contains a null character (0x0), the QString returned by readAll() will be effectively truncated at that point. Likewise, I think QTextBrowser will stop loading when it hits a null.

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