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Thread: QMenu behaving differently on different platforms

  1. #1
    Join Date
    Aug 2021
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    2
    Qt products
    Qt5 Qt/Embedded
    Platforms
    Unix/X11

    Question QMenu behaving differently on different platforms

    Hi!

    Im working on a project that will run on an embedded linux device. On the GUI that Im building I have a QPushButton that has a QMenu that is populated with a bunch of QWidgetActions.

    On my desktop (Kubuntu 18.04 LTS) the QMenu just paints the QWidgets associated with the QWidgetActions in the QMenu (And this is the behaviour that I want)

    On a Windows 10 machine the QMenu paints the QWidgets but it puts a border around them. This border can be deleted with
    Qt Code:
    1. m_pMenu->setStyleSheet( "border: 0;" );
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    On my embedded linux device (I run the application directly on the framebuffer) the QMenu paints the QWidgets but it puts a border around them but I cant turn the border off with the StyleSheet code that works on Windows.

    Any ideas on what to do? I need to remove the border on the embedded linux device. QT Version on the embedded device is 5.12

    Thanks!

  2. #2
    Join Date
    Jun 2012
    Location
    Austria
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    14
    Thanked 1 Time in 1 Post
    Qt products
    Qt4 Qt5
    Platforms
    Unix/X11 Windows

    Default Re: QMenu behaving differently on different platforms

    Hi cRay, could you explain in detail what you mean with "a QPushButton that has a QMenu"? Are you creating a QMenu like a context menu when the button is clicked? Just a weird idea: if you create the QMenu without parent, Qt probably creates a top level window where the decoration depends on the window manager of the system. Do you use QMenu:opup or QMenu::exec ?

  3. #3
    Join Date
    Aug 2021
    Posts
    2
    Qt products
    Qt5 Qt/Embedded
    Platforms
    Unix/X11

    Default Re: QMenu behaving differently on different platforms

    I solved it, I added "-style Fusion" to the command line that started the app on the embedded system.

    QPushButton has a method called "setMenu( QMenu* )" and by default it will show the menu once clicked, thats how I use it.

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