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Bug in Qt 5.12 drag n'drop ?

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qat 5.12 drag ndrop
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  • Christian EhrlicherC Christian Ehrlicher

    Please provide a example - otherwise I don't see how we can spot the problem...

    S Offline
    S Offline
    skylendar
    wrote on last edited by
    #12

    @Christian-Ehrlicher

    Ok, in that case, get my open source app:
    https://sourceforge.net/projects/skylendar/
    and compile it with qt5.12.0
    When compiled and running, drag the "Now" Dataset (on the left column) onto the window named "Standard wheel".

    Then, the pointer becomes a barred red circle, instead of a black hand for dropping, i.e. dropping is impossible.

    When compiled with 5.11 apparently nothing happens because the standard wheel already uses "Now", but it works...

    1 Reply Last reply
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    • Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #13

      I tried to run your app but I won't let something run as root on my system. Please provide a minimal, compilable example to reproduce the issue.

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
      Visit the Qt Academy at https://academy.qt.io/catalog

      aha_1980A 1 Reply Last reply
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      • Christian EhrlicherC Christian Ehrlicher

        I tried to run your app but I won't let something run as root on my system. Please provide a minimal, compilable example to reproduce the issue.

        aha_1980A Offline
        aha_1980A Offline
        aha_1980
        Lifetime Qt Champion
        wrote on last edited by
        #14

        @Christian-Ehrlicher

        I tried to run your app but I won't let something run as root on my system.

        probably the elevated rights are part of the problem?

        Qt has to stay free or it will die.

        Christian EhrlicherC S 3 Replies Last reply
        0
        • aha_1980A aha_1980

          @Christian-Ehrlicher

          I tried to run your app but I won't let something run as root on my system.

          probably the elevated rights are part of the problem?

          Christian EhrlicherC Offline
          Christian EhrlicherC Offline
          Christian Ehrlicher
          Lifetime Qt Champion
          wrote on last edited by
          #15

          @aha_1980 said in Bug in Qt 5.12 drag n'drop ?:

          probably the elevated rights are part of the problem?

          Don't think so - it's using a database and the app which creates the schema etc. wants admin rights. After this it looks like the normal application can run without admin rights but did not came that far.

          Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
          Visit the Qt Academy at https://academy.qt.io/catalog

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          • aha_1980A aha_1980

            @Christian-Ehrlicher

            I tried to run your app but I won't let something run as root on my system.

            probably the elevated rights are part of the problem?

            S Offline
            S Offline
            skylendar
            wrote on last edited by
            #16

            @aha_1980

            No, only skydmin needs admin right in order to install the db. skylendar runs as a normal user.

            1 Reply Last reply
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            • aha_1980A aha_1980

              @Christian-Ehrlicher

              I tried to run your app but I won't let something run as root on my system.

              probably the elevated rights are part of the problem?

              S Offline
              S Offline
              skylendar
              wrote on last edited by
              #17

              @aha_1980

              If you really are scared to run skydmin as root, I can tell you how to install the db as the postgres non-root user.

              aha_1980A 1 Reply Last reply
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              • S skylendar

                @aha_1980

                If you really are scared to run skydmin as root, I can tell you how to install the db as the postgres non-root user.

                aha_1980A Offline
                aha_1980A Offline
                aha_1980
                Lifetime Qt Champion
                wrote on last edited by
                #18

                @skylendar Thanks, but I don't think I'll debug your program ;)

                I have too much of my own problems

                Qt has to stay free or it will die.

                S 2 Replies Last reply
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                • aha_1980A aha_1980

                  @skylendar Thanks, but I don't think I'll debug your program ;)

                  I have too much of my own problems

                  S Offline
                  S Offline
                  skylendar
                  wrote on last edited by
                  #19

                  @aha_1980

                  I don't ask you to debug my app, just run it.

                  1 Reply Last reply
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                  • aha_1980A aha_1980

                    @skylendar Thanks, but I don't think I'll debug your program ;)

                    I have too much of my own problems

                    S Offline
                    S Offline
                    skylendar
                    wrote on last edited by
                    #20

                    @aha_1980

                    In addition, I don't want anything. I just signal a possible bug. That's all.

                    aha_1980A 1 Reply Last reply
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                    • S skylendar

                      @aha_1980

                      In addition, I don't want anything. I just signal a possible bug. That's all.

                      aha_1980A Offline
                      aha_1980A Offline
                      aha_1980
                      Lifetime Qt Champion
                      wrote on last edited by aha_1980
                      #21

                      @skylendar thats why we need a simple program, trimmed down to the actual problem.

                      Otherwise its hard to track down where the bug is. Until now it is not even proven that Qt is guilty.

                      Qt has to stay free or it will die.

                      S 2 Replies Last reply
                      1
                      • aha_1980A aha_1980

                        @skylendar thats why we need a simple program, trimmed down to the actual problem.

                        Otherwise its hard to track down where the bug is. Until now it is not even proven that Qt is guilty.

                        S Offline
                        S Offline
                        skylendar
                        wrote on last edited by
                        #22

                        @aha_1980

                        This is not a matter of guilt or not. We are not in an american thriller.
                        And besides, how do you explain that my app works fine with qt5.11 and below, but not with qt5.12 ?

                        1 Reply Last reply
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                        • aha_1980A aha_1980

                          @skylendar thats why we need a simple program, trimmed down to the actual problem.

                          Otherwise its hard to track down where the bug is. Until now it is not even proven that Qt is guilty.

                          S Offline
                          S Offline
                          skylendar
                          wrote on last edited by
                          #23

                          @aha_1980

                          And you forget something: Qt is actually a commercial program, and most of you, if not all, are paid for debugging it. Why should I work for you for free ?

                          mrjjM J.HilkJ 2 Replies Last reply
                          -2
                          • S skylendar

                            @aha_1980

                            And you forget something: Qt is actually a commercial program, and most of you, if not all, are paid for debugging it. Why should I work for you for free ?

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by mrjj
                            #24

                            @skylendar

                            • Qt is actually a commercial program, and most of you, if not all, are paid for debugging it

                            Actually this is a user forums and no one here is paid anything to help :)
                            We are not employees, but ordinary users of Qt.

                            Anyway, i tried some of old drag drop sample with Qt 5.12 and
                            they seems to work. At least on windows.

                            1 Reply Last reply
                            5
                            • S skylendar

                              @aha_1980

                              And you forget something: Qt is actually a commercial program, and most of you, if not all, are paid for debugging it. Why should I work for you for free ?

                              J.HilkJ Offline
                              J.HilkJ Offline
                              J.Hilk
                              Moderators
                              wrote on last edited by
                              #25

                              @skylendar said in Bug in Qt 5.12 drag n'drop ?:

                              @aha_1980

                              And you forget something: Qt is actually a commercial program, and most of you, if not all, are paid for debugging it. Why should I work for you for free ?

                              If you happen to own a commercial license you should contact the customer support they may be able to help you more directly.

                              However they also will ask for a minimal compileable project, if your current project is considerably too large.
                              Alternatively there is also the option of paid consulting either from the QtCompany directly or other companies, like for example KDAB


                              Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                              Q: What's that?
                              A: It's blue light.
                              Q: What does it do?
                              A: It turns blue.

                              S 1 Reply Last reply
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                              • J.HilkJ J.Hilk

                                @skylendar said in Bug in Qt 5.12 drag n'drop ?:

                                @aha_1980

                                And you forget something: Qt is actually a commercial program, and most of you, if not all, are paid for debugging it. Why should I work for you for free ?

                                If you happen to own a commercial license you should contact the customer support they may be able to help you more directly.

                                However they also will ask for a minimal compileable project, if your current project is considerably too large.
                                Alternatively there is also the option of paid consulting either from the QtCompany directly or other companies, like for example KDAB

                                S Offline
                                S Offline
                                skylendar
                                wrote on last edited by
                                #26

                                @J.Hilk

                                Who has a linux dnd program which can be tested ?

                                mrjjM 1 Reply Last reply
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                                • S skylendar

                                  @J.Hilk

                                  Who has a linux dnd program which can be tested ?

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #27

                                  @skylendar
                                  Hi
                                  What about test with the sample that comes with Qt ?
                                  http://doc.qt.io/qt-5/dnd.html#examples
                                  There are often directly available in Creator.

                                  S 1 Reply Last reply
                                  0
                                  • mrjjM mrjj

                                    @skylendar
                                    Hi
                                    What about test with the sample that comes with Qt ?
                                    http://doc.qt.io/qt-5/dnd.html#examples
                                    There are often directly available in Creator.

                                    S Offline
                                    S Offline
                                    skylendar
                                    wrote on last edited by
                                    #28

                                    @mrjj

                                    Found the puzzle in the examples. It works, but in my case the draggable widget is placed in a QTreeWidget, not just an ordinary QWidget.

                                    mrjjM 1 Reply Last reply
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                                    • S skylendar

                                      @mrjj

                                      Found the puzzle in the examples. It works, but in my case the draggable widget is placed in a QTreeWidget, not just an ordinary QWidget.

                                      mrjjM Offline
                                      mrjjM Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #29

                                      Hi
                                      well it its almost the same unless you used
                                      QStandardItemModel::dropMimeData()
                                      or something like that.

                                      S 1 Reply Last reply
                                      0
                                      • mrjjM mrjj

                                        Hi
                                        well it its almost the same unless you used
                                        QStandardItemModel::dropMimeData()
                                        or something like that.

                                        S Offline
                                        S Offline
                                        skylendar
                                        wrote on last edited by skylendar
                                        #30

                                        @mrjj

                                        I can drag from my QTreeWidget, but I can't drop anymore my icon onto my QWidget target, whereas it worked in the previous version of qt (5.11).

                                        Everything seems ok, but the dropEvent() method of my QWidget isn't activated (setAcceptDrop() is set to true, of course)

                                        mrjjM 1 Reply Last reply
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                                        • S skylendar

                                          @mrjj

                                          I can drag from my QTreeWidget, but I can't drop anymore my icon onto my QWidget target, whereas it worked in the previous version of qt (5.11).

                                          Everything seems ok, but the dropEvent() method of my QWidget isn't activated (setAcceptDrop() is set to true, of course)

                                          mrjjM Offline
                                          mrjjM Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #31

                                          @skylendar
                                          Check the
                                          http://doc.qt.io/qt-5/qtwidgets-draganddrop-puzzle-example.html
                                          as it drops from ListWidget to Widget.

                                          S 1 Reply Last reply
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