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Bug in Qt 5.12 drag n'drop ?

Scheduled Pinned Locked Moved Unsolved General and Desktop
qat 5.12 drag ndrop
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  • C Offline
    C Offline
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on 15 Dec 2018, 08:47 last edited by
    #11

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

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

    S 1 Reply Last reply 15 Dec 2018, 16:06
    1
    • C Christian Ehrlicher
      15 Dec 2018, 08:47

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

      S Offline
      S Offline
      skylendar
      wrote on 15 Dec 2018, 16:06 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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      • C Offline
        C Offline
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on 15 Dec 2018, 16:28 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

        A 1 Reply Last reply 15 Dec 2018, 16:30
        1
        • C Christian Ehrlicher
          15 Dec 2018, 16:28

          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.

          A Offline
          A Offline
          aha_1980
          Lifetime Qt Champion
          wrote on 15 Dec 2018, 16:30 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.

          C S 3 Replies Last reply 15 Dec 2018, 16:40
          0
          • A aha_1980
            15 Dec 2018, 16:30

            @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?

            C Offline
            C Offline
            Christian Ehrlicher
            Lifetime Qt Champion
            wrote on 15 Dec 2018, 16:40 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

            1 Reply Last reply
            0
            • A aha_1980
              15 Dec 2018, 16:30

              @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 15 Dec 2018, 16:44 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
              0
              • A aha_1980
                15 Dec 2018, 16:30

                @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 15 Dec 2018, 16:46 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.

                A 1 Reply Last reply 15 Dec 2018, 16:54
                0
                • S skylendar
                  15 Dec 2018, 16:46

                  @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.

                  A Offline
                  A Offline
                  aha_1980
                  Lifetime Qt Champion
                  wrote on 15 Dec 2018, 16:54 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 15 Dec 2018, 17:00
                  0
                  • A aha_1980
                    15 Dec 2018, 16:54

                    @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 15 Dec 2018, 17:00 last edited by
                    #19

                    @aha_1980

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

                    1 Reply Last reply
                    0
                    • A aha_1980
                      15 Dec 2018, 16:54

                      @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 15 Dec 2018, 17:05 last edited by
                      #20

                      @aha_1980

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

                      A 1 Reply Last reply 15 Dec 2018, 17:28
                      0
                      • S skylendar
                        15 Dec 2018, 17:05

                        @aha_1980

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

                        A Offline
                        A Offline
                        aha_1980
                        Lifetime Qt Champion
                        wrote on 15 Dec 2018, 17:28 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 15 Dec 2018, 17:50
                        1
                        • A aha_1980
                          15 Dec 2018, 17:28

                          @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 15 Dec 2018, 17:50 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
                          0
                          • A aha_1980
                            15 Dec 2018, 17:28

                            @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 15 Dec 2018, 18:02 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 ?

                            M J 2 Replies Last reply 15 Dec 2018, 18:22
                            -2
                            • S skylendar
                              15 Dec 2018, 18:02

                              @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 ?

                              M Offline
                              M Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on 15 Dec 2018, 18:22 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
                                15 Dec 2018, 18:02

                                @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 Offline
                                J Offline
                                J.Hilk
                                Moderators
                                wrote on 16 Dec 2018, 08:27 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 16 Dec 2018, 14:04
                                2
                                • J J.Hilk
                                  16 Dec 2018, 08:27

                                  @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 16 Dec 2018, 14:04 last edited by
                                  #26

                                  @J.Hilk

                                  Who has a linux dnd program which can be tested ?

                                  M 1 Reply Last reply 16 Dec 2018, 16:01
                                  0
                                  • S skylendar
                                    16 Dec 2018, 14:04

                                    @J.Hilk

                                    Who has a linux dnd program which can be tested ?

                                    M Offline
                                    M Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on 16 Dec 2018, 16:01 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 17 Dec 2018, 15:41
                                    0
                                    • M mrjj
                                      16 Dec 2018, 16:01

                                      @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 17 Dec 2018, 15:41 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.

                                      M 1 Reply Last reply 17 Dec 2018, 15:59
                                      0
                                      • S skylendar
                                        17 Dec 2018, 15:41

                                        @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.

                                        M Offline
                                        M Offline
                                        mrjj
                                        Lifetime Qt Champion
                                        wrote on 17 Dec 2018, 15:59 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 17 Dec 2018, 16:44
                                        0
                                        • M mrjj
                                          17 Dec 2018, 15:59

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

                                          S Offline
                                          S Offline
                                          skylendar
                                          wrote on 17 Dec 2018, 16:44 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)

                                          M 1 Reply Last reply 17 Dec 2018, 16:52
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