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Moving QTreeWidgetItems between two QTreeWidgets

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  • O Ovidiu_GCO

    @Pl45m4 My first problem is that I am not able to move the parent. I only managed to move it using Drag&Drop, but not using the button ">>".

    Pl45m4P Offline
    Pl45m4P Offline
    Pl45m4
    wrote on last edited by
    #13

    @Ovidiu_GCO

    The Qt Doc says that all items are selectable, checkable... by default.
    If you get your selected item when ">>" is clicked, it should be fine.

    // same with move left  (<<) btn
    connect(moveRightBtn, SIGNAL(clicked()), this, SLOT(moveItemFnct ());
    
    // Your move fnct:
    void moveItem()
    {
       //Get current selected item and append to
    // your list on the right
    
    

    Actually there is a SIGNAL to get the clicked item + its column.
    Check it out
    http://doc.qt.io/qt-5/qtreewidget.html#itemPressed


    If debugging is the process of removing software bugs, then programming must be the process of putting them in.

    ~E. W. Dijkstra

    O 1 Reply Last reply
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    • Pl45m4P Pl45m4

      @Ovidiu_GCO

      The Qt Doc says that all items are selectable, checkable... by default.
      If you get your selected item when ">>" is clicked, it should be fine.

      // same with move left  (<<) btn
      connect(moveRightBtn, SIGNAL(clicked()), this, SLOT(moveItemFnct ());
      
      // Your move fnct:
      void moveItem()
      {
         //Get current selected item and append to
      // your list on the right
      
      

      Actually there is a SIGNAL to get the clicked item + its column.
      Check it out
      http://doc.qt.io/qt-5/qtreewidget.html#itemPressed

      O Offline
      O Offline
      Ovidiu_GCO
      wrote on last edited by
      #14

      @Pl45m4 I had no doubt it should work, but it is not working. I can't even copy the parent-item to the "Participants" QTreeWidget

      Pl45m4P 1 Reply Last reply
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      • O Ovidiu_GCO

        @Pl45m4 I had no doubt it should work, but it is not working. I can't even copy the parent-item to the "Participants" QTreeWidget

        Pl45m4P Offline
        Pl45m4P Offline
        Pl45m4
        wrote on last edited by Pl45m4
        #15

        @Ovidiu_GCO

        I just tried it... (2 TreeWidgets with only two parent items each)

        I can access the items and get their names and stuff but they don't appear in the second TreeWidget :(
        Even the selection by mouseClick worked and I got the name / indices from each item by pressing the button.
        Maybe we overlook something?! Some steps to copy to a TreeWidget or maybe the items lose required flags when you "export" the items and try to add them to a different TreeWidget?!


        If debugging is the process of removing software bugs, then programming must be the process of putting them in.

        ~E. W. Dijkstra

        O 1 Reply Last reply
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        • Maaz MominM Offline
          Maaz MominM Offline
          Maaz Momin
          wrote on last edited by
          #16

          @Ovidiu_GCO Can you show the code you have written after changes mentioned.

          O 1 Reply Last reply
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          • Pl45m4P Pl45m4

            @Ovidiu_GCO

            I just tried it... (2 TreeWidgets with only two parent items each)

            I can access the items and get their names and stuff but they don't appear in the second TreeWidget :(
            Even the selection by mouseClick worked and I got the name / indices from each item by pressing the button.
            Maybe we overlook something?! Some steps to copy to a TreeWidget or maybe the items lose required flags when you "export" the items and try to add them to a different TreeWidget?!

            O Offline
            O Offline
            Ovidiu_GCO
            wrote on last edited by
            #17

            @Pl45m4 I know, I tried it too. I was reading a post on stackoverflow but I didn't understand all of it. As far as I understood, QTreeWidget is used for static-view and we should use QTreeView(since Qt 5), but I don't find the documentation very friendly and I am still trying to understand it.

            Maybe we should switch to QTreeView?

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            • Maaz MominM Maaz Momin

              @Ovidiu_GCO Can you show the code you have written after changes mentioned.

              O Offline
              O Offline
              Ovidiu_GCO
              wrote on last edited by
              #18

              @Maaz-Momin At this moment, my code for the ">>" button is a work in-progress and I kinda messed it up, but now it looks like this:

              QTreeWidgetItemIterator it(ui.driversList);
              
              		while (*it) {
              			if ((*it)->isSelected())
              				ui.participantsList->addTopLevelItem((*it));
              			++it;
              		}
              

              I tried to make it copy any selected item from "Drivers" to "Participants", but there is no change in the view.

              I didn't try to use .takeChild() yet, because I didn't manage to move the parent using code, just by Drag&Drop.

              1 Reply Last reply
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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #19

                Hi,

                Out of curiosity, why are you using a tree model ?

                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
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                • SGaistS SGaist

                  Hi,

                  Out of curiosity, why are you using a tree model ?

                  O Offline
                  O Offline
                  Ovidiu_GCO
                  wrote on last edited by
                  #20

                  @SGaist Honestly, I don't really know... This is my first project using Qt (or even C++ on a more serious project). I am not familiar with it or any other framework, for that matter.

                  It is a school project and I am trying to make it work so I can add it to my portofolio hoping that in the future I will become an intern with Qt and C++(and eventually a Junior Software Engineer).

                  So, I use it because it is the first widget that seemed to work for me.
                  I need to show some details about the drivers from the database and select a few of them to participate in a race.

                  I believe I could use also a QTableView(since there are not a lot of details beside the name) with a checkbox on the last column that would tell if the driver is a participant or not, but I am still trying to make it work with QTreeWidgets.

                  I am open to suggestions, if you have an idea that would be appropriate to a newbie like me.

                  jsulmJ 1 Reply Last reply
                  0
                  • O Ovidiu_GCO

                    @SGaist Honestly, I don't really know... This is my first project using Qt (or even C++ on a more serious project). I am not familiar with it or any other framework, for that matter.

                    It is a school project and I am trying to make it work so I can add it to my portofolio hoping that in the future I will become an intern with Qt and C++(and eventually a Junior Software Engineer).

                    So, I use it because it is the first widget that seemed to work for me.
                    I need to show some details about the drivers from the database and select a few of them to participate in a race.

                    I believe I could use also a QTableView(since there are not a lot of details beside the name) with a checkbox on the last column that would tell if the driver is a participant or not, but I am still trying to make it work with QTreeWidgets.

                    I am open to suggestions, if you have an idea that would be appropriate to a newbie like me.

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #21

                    @Ovidiu_GCO Do you really need a tree structure? If not you could simply use QListWidget.

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

                    O 1 Reply Last reply
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                    • jsulmJ jsulm

                      @Ovidiu_GCO Do you really need a tree structure? If not you could simply use QListWidget.

                      O Offline
                      O Offline
                      Ovidiu_GCO
                      wrote on last edited by
                      #22

                      @jsulm I have to display a driver, his car and some specs for it. I think I will try a QTableView/QTableWidget

                      mrjjM 1 Reply Last reply
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                      • O Ovidiu_GCO

                        @jsulm I have to display a driver, his car and some specs for it. I think I will try a QTableView/QTableWidget

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #23

                        @Ovidiu_GCO
                        Hi
                        Would a driver have more than one car,
                        or could the the information be presented as one item ?
                        like
                        alt text

                        O 1 Reply Last reply
                        0
                        • mrjjM mrjj

                          @Ovidiu_GCO
                          Hi
                          Would a driver have more than one car,
                          or could the the information be presented as one item ?
                          like
                          alt text

                          O Offline
                          O Offline
                          Ovidiu_GCO
                          wrote on last edited by
                          #24

                          @mrjj There could be more entries of the same driver with different cars, yes.

                          I will try the QTableWidget approach, but I already stepped in other problems with it. (I will make a new post since they are not connected).

                          Thank you all for your time and advices! ;)

                          mrjjM jsulmJ 2 Replies Last reply
                          0
                          • O Ovidiu_GCO

                            @mrjj There could be more entries of the same driver with different cars, yes.

                            I will try the QTableWidget approach, but I already stepped in other problems with it. (I will make a new post since they are not connected).

                            Thank you all for your time and advices! ;)

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by mrjj
                            #25

                            Hi
                            Ok, so it really is a tree/table structure.
                            -Driver
                            --Car
                            stats
                            --Car
                            Stats

                            But i do wonder when you then select a driver, all his cars should
                            also be shown in the other list or just one of the cars ? (used for that race)

                            I liked this info
                            https://wiki.qt.io/How_to_Use_QTableWidget

                            when starting using QTableWidget

                            1 Reply Last reply
                            0
                            • O Ovidiu_GCO

                              @mrjj There could be more entries of the same driver with different cars, yes.

                              I will try the QTableWidget approach, but I already stepped in other problems with it. (I will make a new post since they are not connected).

                              Thank you all for your time and advices! ;)

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #26

                              @Ovidiu_GCO As alternative you could use several list widgets:

                              1. On the left is a list of drivers
                              2. To the right side of the first list you have a second one: when you select a driver you put the cars of that driver into this list
                              3. More lists if needed...

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

                              1 Reply Last reply
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