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Make TableView Editable in QT Designer form class without buttons

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  • Christian EhrlicherC Offline
    Christian EhrlicherC Offline
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on last edited by
    #2

    You should take a look at QSqlTableModel

    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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    • A Ahsan Niaz

      Hi, I am a newbie in QT environment.
      I have created an application using QT Designer Form Class. I have multiple forms, and these forms are connected to each other end to end. The last form I have is connected to database successfully. In the UI of this form, I have two major things.

      1. Push button to load data from sqlite table
      2. TableView to show the loaded data
        There are two major things i want to do,
      • I want to make tableview editable, i.e if i double click a cell in tableview, it should allow me to edit the value of that cell.
      • I have tried setedittriggers etc, but nothing worked. I also tried to change the triggers from the UI, but it never worked.
      • Secondly, if we succeed in making the tableview editable, i want to upload the edited table back to my database.
        This is what i have done by now, which working fine but not editing the tableview cells
      void Case_Adjustment::on_pushButton_clicked()
      {
      
      
          Case_Adjustment co;
          QSqlQueryModel * modal = new  QSqlQueryModel();
          QSqlQuery * qry = new QSqlQuery(co.mydb);
          qry->prepare("select * from comparison");
          qry->exec();
          modal->setQuery(*qry);
          //table.setModel((modal));
          ui->tableView->setModel(modal);
      
      
      }
      

      Is there anyone who can help in this regard? I will be really thankful

      JonBJ Offline
      JonBJ Offline
      JonB
      wrote on last edited by JonB
      #3

      @Ahsan-Niaz said in Make TableView Editable in QT Designer form class without buttons:

      I have tried setedittriggers etc, but nothing worked. I also tried to change the triggers from the UI, but it never worked.

      Well, it should do, so you had better show your attempts. (I think the defaults are editable on double-click, without you needing to make any changes on edit triggers.) You should be hooking the QTableView to a QSqlTableModel which connects to the SQLite database. Once this works all of your requirements should be satisfied.

      Make sure you have read the conceptual https://doc.qt.io/qt-5/model-view-programming.html. A whole, simple example for just your situation is https://doc.qt.io/qt-5/qtsql-tablemodel-example.html.

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      • A Offline
        A Offline
        Ahsan Niaz
        wrote on last edited by
        #4

        I have set

        • editTriggers to QAbstractItemView::NoEditTriggers
        • selectionBehavior to QAbstractItemView::SelectRows
          But i couldn't edit the cells, I am using Qt Creator to build my application
        JonBJ 1 Reply Last reply
        0
        • A Ahsan Niaz

          I have set

          • editTriggers to QAbstractItemView::NoEditTriggers
          • selectionBehavior to QAbstractItemView::SelectRows
            But i couldn't edit the cells, I am using Qt Creator to build my application
          JonBJ Offline
          JonBJ Offline
          JonB
          wrote on last edited by JonB
          #5

          @Ahsan-Niaz said in Make TableView Editable in QT Designer form class without buttons:

          editTriggers to QAbstractItemView::NoEditTriggers

          So that will obviously prevent you from clicking-to-edit, which you stated you want:

          I want to make tableview editable, i.e if i double click a cell in tableview, it should allow me to edit the value of that cell.

          So why set no edit triggers, and then wonder why it's not editable??

          Anyway, I linked you to a 30-line example code which works.

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          • A Offline
            A Offline
            Ahsan Niaz
            wrote on last edited by
            #6

            Thanks for your Guide MR. JonB
            I have used this

            QSqlTableModel *model = new QSqlTableModel;
                model->setTable("employee");
                model->setEditStrategy(QSqlTableModel::OnManualSubmit);
                model->select();
                
            
                QTableView *view = new QTableView;
                view->setModel(model);
                view->hideColumn(0); // don't show the ID
                view->show();
            

            which has successfully loaded the data to a separate window where cells are editable. What do i need to do to upload the edited table back to my database? Any hints?

            mrjjM 1 Reply Last reply
            0
            • A Ahsan Niaz

              Thanks for your Guide MR. JonB
              I have used this

              QSqlTableModel *model = new QSqlTableModel;
                  model->setTable("employee");
                  model->setEditStrategy(QSqlTableModel::OnManualSubmit);
                  model->select();
                  
              
                  QTableView *view = new QTableView;
                  view->setModel(model);
                  view->hideColumn(0); // don't show the ID
                  view->show();
              

              which has successfully loaded the data to a separate window where cells are editable. What do i need to do to upload the edited table back to my database? Any hints?

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by mrjj
              #7

              Hi
              Since you have set
              QSqlTableModel::OnManualSubmit
              then you need to call summitAll to make it write it back.
              https://doc.qt.io/qt-5/qsqltablemodel.html#submitAll

              Or simply dont have it set to manual.

              https://doc.qt.io/qt-5/qsqltablemodel.html#EditStrategy-enum

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              • A Offline
                A Offline
                Ahsan Niaz
                wrote on last edited by
                #8

                @mrjj I am really sorry but i couldn't get this, I ran the following code

                QSqlTableModel *model = new QSqlTableModel;
                    model->setTable("employee");
                    model->setEditStrategy(QSqlTableModel::OnManualSubmit);
                    model->select();
                    
                
                    QTableView *view = new QTableView;
                    view->setModel(model);
                    
                    view->show();
                

                it ran well, without errors, created a separate window, loaded the table perfectly, when i double clicked a cell, it seemed to be editable, but it doesn't get any keyboard input,
                Saying again, it looks like it is editable when i double click, but it is not taking any input from the keyboard.
                I have also changed OnManualSubmit to OnRowChange

                mrjjM 1 Reply Last reply
                0
                • A Ahsan Niaz

                  @mrjj I am really sorry but i couldn't get this, I ran the following code

                  QSqlTableModel *model = new QSqlTableModel;
                      model->setTable("employee");
                      model->setEditStrategy(QSqlTableModel::OnManualSubmit);
                      model->select();
                      
                  
                      QTableView *view = new QTableView;
                      view->setModel(model);
                      
                      view->show();
                  

                  it ran well, without errors, created a separate window, loaded the table perfectly, when i double clicked a cell, it seemed to be editable, but it doesn't get any keyboard input,
                  Saying again, it looks like it is editable when i double click, but it is not taking any input from the keyboard.
                  I have also changed OnManualSubmit to OnRowChange

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

                  @Ahsan-Niaz
                  Hi
                  Sorry, I dont know what that could be as if it goes into edit mode then you should also be able to press keys in it.

                  I did fast test and it edits fine.

                  https://www.dropbox.com/s/lk0irtwlorat382/mysql2.zip?dl=0

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                  • A Offline
                    A Offline
                    Ahsan Niaz
                    wrote on last edited by
                    #10

                    I made it workable with your help, can you tell me how to make the topic RESOLVED?

                    mrjjM 1 Reply Last reply
                    1
                    • A Ahsan Niaz

                      I made it workable with your help, can you tell me how to make the topic RESOLVED?

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by mrjj
                      #11

                      @Ahsan-Niaz

                      Hi
                      Good to hear :)
                      At the first post, there are topic tools button to the right side, and in there you can set to solved:
                      alt text

                      Also, what fixed it for you?
                      Just for future readers in case, they run into the same.

                      1 Reply Last reply
                      0
                      • A Offline
                        A Offline
                        Ahsan Niaz
                        wrote on last edited by
                        #12

                        i had a form where i had to click (Load Table) . i hide that form to make the tablewindow editable.

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