Menu items greyed out

  • Hi all: I am a newbie in Qt, even though have worked in C++.

    Developing a basic GUI. In that, have plugged in a simple media player using QMediaPlayer. But some of the menu items in Edit - like Cut / Copy / Paste - is greyed out while playing the video. But at other times it is active. I have checked designer UI file, and it is enabled as well. Other menu items in Edit menu are active.
    Any solutions for this trivial & strange issue?
    Thanks a ton, folks.

  • Moderators

    @krec-dev said in Menu items greyed out:

    But some of the menu items in Edit - like Cut / Copy / Paste - is greyed out while playing the video. But at other times it is active.

    about what menu are you talking?
    Where do the menu actions come from?

  • Thanks @raven-worx for the note. My developed demo GUI for a video player has a EDIT menu, which has simple menu items called copy, paste etc.

    While the video is playing in the media player, the menu items of copy & paste in Edit menu in the top menu bar is greyed out. At other items, these menu items - copy & paste - in Edit menu are active.

    I have also attached a screenshot for your kind reference.

    Added to this, there is this un-needed "Emoji Symbols " menu in the Edit menu drop down on Mac. Any work arounds for that?


  • Moderators

    you haven't answered my question, but nevermind i figured it out by myself.
    try the following:

    #ifdef Q_OS_MAC
    #include <Foundation/NSUserDefaults.h>
    int main(int argc, char **argv)
    #ifdef Q_OS_MAC
        [[NSUserDefaults standardUserDefaults]
            setBool:YES forKey:@"NSDisabledCharacterPaletteMenuItem"];
        [[NSUserDefaults standardUserDefaults]
            setBool:YES forKey:@"NSDisabledDictationMenuItem"];
        QApplication app(argc, argv);
        return app.exec();

  • Seems that you're disabling these action.

    I don't know your implementation, but would you think that may be a good idea to set up the actions in the ctor or any function that changes the actions?

    Thank you

  • To add further to this and clarify , please note the menu items will be disabled ONLY after calling QFileDialog to open and load a video file to play. Does this have any issue as mentioned here ( Need to check.

    Thanks for the replies, @raven-worx. But seems, the solutions is for the "emoji symbols and start dictation " menu items. But it appears it does not work out. I will explore that again.

    @Charlie_Hdz. I have not setup any actions, in fact tried adding simple statements after setting up actions too, but still it does not work. The moment , Copy/ Paste /Cut changes to say demo or Copies, Pastes, Cuts - the menu items are active!
    I observe on stack overflow, that giving space while defining the titles in creator will solve that, but it has not worked out for me so far.

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