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Enabling and Disabling Window Widgets?

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  • SPlattenS Offline
    SPlattenS Offline
    SPlatten
    wrote on last edited by SPlatten
    #6

    Here is the code I use to set the window flags:

                if ( strPropName.compare(clsXMLnode::mscszPropertyClose) == 0 ) {
                    if ( strPropValue.compare(clsXMLnode::mscszTrue) == 0 ) {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              | Qt::WindowCloseButtonHint);
                    } else {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              & ~Qt::WindowCloseButtonHint);
                    }
                } else if ( strPropName.compare(clsXMLnode::mscszPropertyFrameless) == 0 ) {
                    if ( strPropValue.compare(clsXMLnode::mscszTrue) == 0 ) {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              & ~Qt::FramelessWindowHint);
                    } else {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              | Qt::FramelessWindowHint);
                    }
                } else if ( strPropName.compare(clsXMLnode::mscszPropertyMaxmize) == 0 ) {
                    if ( strPropValue.compare(clsXMLnode::mscszTrue) == 0 ) {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              | Qt::WindowMaximizeButtonHint);
                    } else {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              & ~Qt::WindowMaximizeButtonHint);
                    }
                } else if ( strPropName.compare(clsXMLnode::mscszPropertyMinMax) == 0 ) {
                    if ( strPropValue.compare(clsXMLnode::mscszTrue) == 0 ) {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              | Qt::WindowMinMaxButtonsHint);
                    } else {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              & ~(Qt::WindowMinMaxButtonsHint
                                                                                | Qt::WindowMinimizeButtonHint
                                                                                | Qt::WindowMaximizeButtonHint));
                    }
                } else if ( strPropName.compare(clsXMLnode::mscszPropertyMinimize) == 0 ) {
                    if ( strPropValue.compare(clsXMLnode::mscszTrue) == 0 ) {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              | Qt::WindowMinimizeButtonHint);
                    } else {
                        pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                              & ~Qt::WindowMinimizeButtonHint);
                    }
                }
    

    The above is typical for all flags. pobjWidget:

    if ( strNodeName.compare(clsXMLnode::mscszNodeWindow) == 0 ) {
            pobjWidget = static_cast<QWidget*>(pobjCtrl);        
    }
    

    In the above example pobjCtrl will be a pointer to the window widget. This works for the minimise widget, it doesn't work for the close and maximise / restore widgets.

    [Edit] Found some posts online which detail how to disable resizing:

     setSizeGripEnabled(false);
    

    I would have expected that since flags exist for these to work, they don't. This won't solve my problem as the method is part of QStatusBar, my window doesn't have a status bar and shouldn't need it to disable sizing.

    QWindow has a method called setFlags, is this the same as calling the setWindowFlags on the widget?

    @J.Hilk, Just reading your post again, yes your solution is for windows only. How do I do this for Windows, iOS and Linux, I would have thought this would be handled by Qt.

    @SGaist, is the code I've posted sufficient?

    Kind Regards,
    Sy

    1 Reply Last reply
    0
    • SPlattenS Offline
      SPlattenS Offline
      SPlatten
      wrote on last edited by
      #7

      I tried:

                      pobjWidget->setWindowFlags((pobjWidget->windowFlags() | Qt::CustomizeWindowHint)
                                                                            & ~Qt::WindowMaximizeButtonHint);
                      QRect rctGeom = pobjWidget->geometry();
                      pobjWidget->setFixedSize(rctGeom.width(), rctGeom.height());
      

      Didn't work widget still accessible.

      Kind Regards,
      Sy

      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #8

        @SPlatten said in Enabling and Disabling Window Widgets?:

        @SGaist, is the code I've posted sufficient?

        No it's not, it doesn't allow anybody to easily reproduce what you are doing.

        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
        1
        • mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #9

          Hi
          If i may suggest a different approach.
          Try running
          http://doc.qt.io/qt-5/qtwidgets-widgets-windowflags-example.html
          on your platform(s) and see what the combinations gives/shows.

          1 Reply Last reply
          2
          • SPlattenS Offline
            SPlattenS Offline
            SPlatten
            wrote on last edited by
            #10

            @mrjj , Thank you, I'll try this tonight, 7:40 am now, I'm not back at my system until 18:00 tonight.

            Kind Regards,
            Sy

            1 Reply Last reply
            0
            • SPlattenS Offline
              SPlattenS Offline
              SPlatten
              wrote on last edited by SPlatten
              #11

              @mrjj, I downloaded all the files and built the demo, just to recap, the version of OSX I'm running on my macBook Pro is High Sierra version 10.13.6.

              The version of Qt is 5.11.2 (Clang 8.0 (Apple) 64 bit). I would love to say the application worked and has solved all my problems, I was planning to debug it and then replicate how it works, sadly its no better than my code.

              This is what I've done, launch the application, the default settings are:

              Radio buttons, Window selected and Preview child window displayed.
              All checkboxes unchecked.

              Here is what happens:

              MS Windows fixed size dialog
              unchecked, I can resize the preview window
              checked, no effect on preview window, I can still do everything I could without it checked

              Frameless window
              unchecked, window title and widgets visible
              checked, window title and widgets removed

              No drop shadow
              unchecked, window has drop shadow
              checked, window doesn't have drop shadow

              Window title, unchecked or checked, no effect
              Window system menu, unchecked or checked, no effect
              Customize window, seems to have same effect as Frameless window
              Window minimize button, unchecked or checked, no effect
              Window maximise button, unchecked or checked, no effect
              Window close button, unchecked or checked, no effect
              Window context help button, unchecked or checked, no effect
              Window shade button, unchecked or checked, no effect

              Window stays on top
              unchecked, window doesn't stay on top
              checked, window stays on top

              Window stays on bottom, unchecked or checked, no effect

              Overall very disappointing it seems that most of the hints have no effect at all, surely this is a bug that needs attention ?

              Kind Regards,
              Sy

              1 Reply Last reply
              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #12

                Just to be sure we are on the same page: are you trying to develop a desktop like application for iOS ?

                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
                • SPlattenS Offline
                  SPlattenS Offline
                  SPlatten
                  wrote on last edited by SPlatten
                  #13

                  @SGaist, I'm trying to develop a desktop application that ultimately can be run on any OS supported by Qt, including Windows, iOS and Linux.

                  Kind Regards,
                  Sy

                  1 Reply Last reply
                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #14

                    You have to take into account that iOS and Android don't offer the same kind of window management as the desktop OSs and that's nothing Qt can do about. For example, on mobile OSs you usually have one full screen application where you can have some dialogs but it's not comparable to what Linux, macOS or others have for you through e.g. Xorg or wayland.

                    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
                    • SPlattenS Offline
                      SPlattenS Offline
                      SPlatten
                      wrote on last edited by SPlatten
                      #15

                      Sorry, I forgot to add OSX to the list and thats what my tests have been on my MacBook Pro running OSX High Sierra version 10.13.6

                      I accept what you are saying with respect to Android and iOS, but the isn't one of those.

                      Please download the same example code as posted in the link by mrjj, report back with OS version and Qt version if you find anything different...

                      Kind Regards,
                      Sy

                      mrjjM 1 Reply Last reply
                      0
                      • SPlattenS SPlatten

                        Sorry, I forgot to add OSX to the list and thats what my tests have been on my MacBook Pro running OSX High Sierra version 10.13.6

                        I accept what you are saying with respect to Android and iOS, but the isn't one of those.

                        Please download the same example code as posted in the link by mrjj, report back with OS version and Qt version if you find anything different...

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #16

                        @SPlatten
                        Hi
                        Sorry should have mentioned it.
                        The samples are directly available in Creator with a normal install.
                        alt text

                        Sadly i cant help testing as i have no access to any Macs.

                        1 Reply Last reply
                        0
                        • SPlattenS Offline
                          SPlattenS Offline
                          SPlatten
                          wrote on last edited by
                          #17

                          The point is Qt is supposed to be multi-platform, I don't have a Windows PC or Linux, only Mac's and clearly it doesn't appear to work.

                          Kind Regards,
                          Sy

                          mrjjM 1 Reply Last reply
                          0
                          • SPlattenS SPlatten

                            The point is Qt is supposed to be multi-platform, I don't have a Windows PC or Linux, only Mac's and clearly it doesn't appear to work.

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by mrjj
                            #18

                            @SPlatten
                            Well not all hints are supported on all platforms.
                            The name is often a give away
                            like Qt::MSWindowsFixedSizeDialogHint
                            Note the MS in front.
                            or like X11BypassWindowManagerHint which is for linux / X11
                            Its mention here.
                            http://doc.qt.io/qt-5/qt.html#WindowType-enum

                            The MSWindowsFixedSizeDialogHint do work on Windows.
                            alt text

                            1 Reply Last reply
                            1
                            • SPlattenS Offline
                              SPlattenS Offline
                              SPlatten
                              wrote on last edited by
                              #19

                              Sorry, for a product as mature as Qt this isn't what I would expect, I know this kind of thing is perfectly possible, just Qt doesn't currently work correctly.

                              Kind Regards,
                              Sy

                              mrjjM 1 Reply Last reply
                              0
                              • SPlattenS SPlatten

                                Sorry, for a product as mature as Qt this isn't what I would expect, I know this kind of thing is perfectly possible, just Qt doesn't currently work correctly.

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by
                                #20

                                @SPlatten
                                Well it depends on platform and the Windows manger in use.
                                Some combinations are not possible in Windows either.
                                Also some windows mangers on linux also ignore certain Hints.
                                You are aware that Qt does not draw the decorations by its self ?
                                Its handled by the OS and might not offer any way to apply it
                                and Qt would have to resort to custom drawn decorations.

                                1 Reply Last reply
                                1
                                • SPlattenS Offline
                                  SPlattenS Offline
                                  SPlatten
                                  wrote on last edited by SPlatten
                                  #21

                                  The fact that it can be done using Xcode means its very possible go do, if Qt didn't rush out quite so many versions, the quality control would be better and the releases more functional.

                                  I'm a big fan of Qt and have used licensed versions of Qt for defence applications, licenses are not cheap and considering the money involved i would be a seriously disappointed by this show stopping lack of functionality.

                                  In less than 2 years I've seen Qt go from 5.1 to 5.11 and still going, releases seem to come out very frequently, which is good in one sense but at what cost?

                                  Kind Regards,
                                  Sy

                                  mrjjM 1 Reply Last reply
                                  0
                                  • SPlattenS SPlatten

                                    The fact that it can be done using Xcode means its very possible go do, if Qt didn't rush out quite so many versions, the quality control would be better and the releases more functional.

                                    I'm a big fan of Qt and have used licensed versions of Qt for defence applications, licenses are not cheap and considering the money involved i would be a seriously disappointed by this show stopping lack of functionality.

                                    In less than 2 years I've seen Qt go from 5.1 to 5.11 and still going, releases seem to come out very frequently, which is good in one sense but at what cost?

                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #22

                                    Well i can relate to that. Personally i would rather have more
                                    QWidgets/Desktop than 3D and QML/Mobile but
                                    the commercial side of Qt must try to focus on the marked
                                    trends.

                                    1 Reply Last reply
                                    0
                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #23

                                      Qt 5.1 was released 5 years ago in 2013.

                                      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
                                      2
                                      • SPlattenS Offline
                                        SPlattenS Offline
                                        SPlatten
                                        wrote on last edited by
                                        #24

                                        @SGaist , ok, still a lot of releases in a short space of time, the functionality I'm trying to use is very fundamental...shouldn't that be addressed?

                                        Kind Regards,
                                        Sy

                                        jsulmJ 1 Reply Last reply
                                        0
                                        • SPlattenS SPlatten

                                          @SGaist , ok, still a lot of releases in a short space of time, the functionality I'm trying to use is very fundamental...shouldn't that be addressed?

                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #25

                                          @SPlatten As @mrjj said window decorations (including the close/minimize buttons) are NOT handled by Qt. Those are handled by the OS. And different OSs are different here (even different window managers on Linux differ here). You can still do this using native APIs.
                                          If you think this should be part of Qt you can file a change request.

                                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          1 Reply Last reply
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