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Widgets style is not the same as my system's style

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  • O Offline
    O Offline
    Oskar der Grosse
    wrote on last edited by
    #1

    Hi, i'm trying to create an app for linux desktop and chose QtWidgets for it. In QtDesigner, widgets look how they should be which is Lightly i'm currently using. But when i try to preview GUI from terminal using "python main.py", widgets are not looking like my system's style. I use KDE Plasma and have another styles too like Breeze and Oxygen. I see only two styles, Windows and Fusion as a result of print(QStyleFactory.keys()). But QtDesigner knows what styles i have and presents me all of styles i have like Breeze Style, Windows Style, Fusion Style, Lightly Style. I'm trying to make widgets look like system's default style do you know how do i do it?
    This is the preview from QtDesigner:
    Screenshot_20211027_202317.png
    And this is the output from "python main.py"
    Screenshot_20211027_202241.png
    The codes in main.py are:

    import sys
    from PySide6.QtWidgets import *
    from PySide6.QtCore import QFile
    from ui_mainwindow import Ui_MainWindow
    from qtstyles import StylePicker
    
    print(QStyleFactory.keys())
    
    class MainWindow(QMainWindow):
        def __init__(self):
            super(MainWindow, self).__init__()
            self.ui = Ui_MainWindow()
            self.ui.setupUi(self)
    
    if __name__ == '__main__':
        app = QApplication(sys.argv)
        app.setStyle('Lightly')
      # app.setStyle("Default')
      # app.setStyle("Breeze')
        window = MainWindow()
        window.show()
    
        sys.exit(app.exec())
    
    1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      Is it a pip installed PySide6 ?

      If so, it likely does not look into your system as it does not use your distribution provided Qt.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      O 1 Reply Last reply
      0
      • SGaistS SGaist

        Hi and welcome to devnet,

        Is it a pip installed PySide6 ?

        If so, it likely does not look into your system as it does not use your distribution provided Qt.

        O Offline
        O Offline
        Oskar der Grosse
        wrote on last edited by
        #3

        @SGaist I uninstalled the PySide6 with doing "pip uninstall PySide6" and installed from my distribution's repositories but this didn't work. I also redone "uic -g python mainwindow.ui > ui_mainwindow.py", nothing changed, i still see Windows and Fusion as a result of print(QStyleFactory.keys()).
        My project folder is located in my Documents folder, should i move project folder somewhere else?

        1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          Can you start your script with the QT_DEBUG_PLUGINS environment variable set to 1 ?

          This is to see what happens on the plugin side.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          O 1 Reply Last reply
          0
          • SGaistS SGaist

            Can you start your script with the QT_DEBUG_PLUGINS environment variable set to 1 ?

            This is to see what happens on the plugin side.

            O Offline
            O Offline
            Oskar der Grosse
            wrote on last edited by
            #5

            @SGaist Setting QT_DEBUG_PLUGINS environment variable to 1 did show nothing to me or i was looking wrong place, i'm a bit cursed at things like this. But thank you so much for taking the time for me. I tried using PyQt5 instead of PySide6 and this worked pretty good. Now i can see every styles that my system has and the GUI is just looks like native. Thank you again.

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #6

              Which distribution are you using ?

              Wait... I just realized, PySide6 uses Qt 6 however your system is likely still on Qt 5 hence your issue.

              Would you mind trying PySide2 ? I guess it should work as well as PyQt5 in that regard.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              O 1 Reply Last reply
              0
              • SGaistS SGaist

                Which distribution are you using ?

                Wait... I just realized, PySide6 uses Qt 6 however your system is likely still on Qt 5 hence your issue.

                Would you mind trying PySide2 ? I guess it should work as well as PyQt5 in that regard.

                O Offline
                O Offline
                Oskar der Grosse
                wrote on last edited by Oskar der Grosse
                #7

                @SGaist im having an another error which is "ImportError: libshiboken2.abi3.so.5.15: cannot open shared object file: No such file or directory" so i didnt even give it a try
                i use manjaro kde

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                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  With PySide2 ?
                  How did you install it ?

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  O 1 Reply Last reply
                  0
                  • SGaistS SGaist

                    With PySide2 ?
                    How did you install it ?

                    O Offline
                    O Offline
                    Oskar der Grosse
                    wrote on last edited by
                    #9

                    @SGaist i have installed it with pip now installed from my distribution's repositories i dont get that error anymore but widgets styles are still fusion

                    1 Reply Last reply
                    0
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      Even if you use a different style explicitly ?

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
                      0

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