Qt Forum - Recently Active Topics

Our forum is a bustling hub of activities for the mightiest minds in the universe. This page contains enough power to contain a list of topics within the past 24 hours.

  • Solved Extracting file path from String

    Solved Extracting file path from String

    Hi @Gagan, QString::section() should work fine. I suspect you're being tripped up by the need for escaping in string literals? Here's a working example: QString str = "My comment given for the...

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  • Unsolved How do I determine whether a file exists?

    Unsolved How do I determine whether a file exists?

    Thanks. I seem to be acquiring quite a library of such QML extensions to cover what seem to be significant deficiencies of an otherwise pretty impressive programming platform. However, it's...

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  • Unsolved Crash when using a ValueAxis in a ChartView. Why?

    Unsolved Crash when using a ValueAxis in a ChartView. Why?

    I don't see where you've instanced valueAxisY ? Are you assigning an null / undefined object to the series y axis?

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  • Unsolved How to access metadata of an image file

    Unsolved How to access metadata of an image file

    Thanks - I feared that might be the case. Have you used exiv2?Do you how robust their build process for Windows is? I bumped into immediate problems with th configure script and didn’t know...

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  • Unsolved Вопрос утечки памяти в приложения написанных на Qt.

    Unsolved Вопрос утечки памяти в приложения написанных на Qt.

    @xintrea Результаты похожи на мои, делать Create object не стоило, в слоте тупо создается еще один объект. Самое интересно что это касается только визуальных классов (наследников QWidget), т.к....

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  • Unsolved How to apply validation on cells in a QTableWidget?

    Unsolved How to apply validation on cells in a QTableWidget?

    @SGaist said in How to apply validation on cells in a QTableWidget?: Did you remove the mapper ? Yes. Are you sure that your editor is used in the first place ? Well yes, because createEditor...

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  • Unsolved Simple sizePolicy Question

    Unsolved Simple sizePolicy Question

    A recent development: the QScrollArea is vertically aligned and also the QLabel as you can see here when I show the QScrollArea border: and in Qt Designer the "Scanning:" QLabel and the...

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  • Solved Deploying a Qt application on Ubuntu 18.04

    Solved Deploying a Qt application on Ubuntu 18.04

    Hi and welcome to devnet, Did you modify your PATH environment variable ?

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  • Unsolved QSqlQueryModel::data() return "null" vs "invalid" QVariant specification

    Unsolved QSqlQueryModel::data() return "null" vs "invalid" QVariant specification

    Hence me asking you for an simple example so that we have exactly the same code to work on and find, if possible, a solution to your problem. Roles and what is returned are two different things....

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  • Unsolved QTextEdit resize on content change?

    Unsolved QTextEdit resize on content change?

    Then why not use QLabel ?

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  • Unsolved Getting QSqlRelationalTableModel from QSqlRelationalTableModel

    Unsolved Getting QSqlRelationalTableModel from QSqlRelationalTableModel

    It's a bit unclear what you want to show on your GUI. Can you post a sketch of it ?

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  • Unsolved move qt files to subdirectory

    Unsolved move qt files to subdirectory

    What if you use lib in place of libs ?

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  • Unsolved help with QtAV

    Unsolved help with QtAV

    Hi, Why did you modify that file ?

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  • Unsolved help to fix some problem in my QmediaPlayer

    Unsolved help to fix some problem in my QmediaPlayer

    Hi@saber said in help to fix some problem in my QmediaPlayer: if (checked ){ //snip } else if (!checked){ //snip } The second if is useless and even makes your code unclear. else is enough as...

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  • Unsolved Qt Creator Project+CUDA build fails ... but ONLY in a Widget application! Please help!

    Unsolved Qt Creator Project+CUDA build fails ... but ONLY in a Widget application! Please help!

    You can use the subdir template and have all the projects needed under only one main project.

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  • Unsolved Qt5 cross compilation in Beaglebone Black

    Unsolved Qt5 cross compilation in Beaglebone Black

    Hi and welcome to devnet, Are you using the same Qt version on your target that you are using to cross-compile your application ?

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  • Unsolved The constructors QQmlApplicationEngine and QSettings spoil the time zone (daylight)

    Unsolved The constructors QQmlApplicationEngine and QSettings spoil the time zone (daylight)

    Do you get the same behaviour if you use Debian's provided version of Qt ?

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  • Unsolved QtConcurrent::run with objects that are deleted

    Unsolved QtConcurrent::run with objects that are deleted

    Use the doc Luke ;-) Short version: the fourth third parameter is a "context" if the context gets delete, then then the disconnection follows and therefore in your case the lambda will not get...

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  • Unsolved Does Qt Creator have Color Scheme Tool Such As Intellij IDEA?

    Unsolved Does Qt Creator have Color Scheme Tool Such As Intellij IDEA?

    Have a look at QColorDialog Class, maybe will help.

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  • Unsolved Can't run Qt app on physical mobile device

    Unsolved Can't run Qt app on physical mobile device

    Hi All, I am trying to build and run Qt app on andoid .seems likes it's building but I am not able to cheack it as it wont run . When I try to compile it , It compiles fine but when I try to run...

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