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Contextmenu in QTreeView

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  • D Offline
    D Offline
    developer_61
    wrote on last edited by developer_61
    #1

    Hello !
    I want use a context menu in the QTreeView. So if i'm going to rightlick an element in the Tree i want to chose between actions.
    I tried following:

    ui->tree->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(ui->tree, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(showContextMenu(const QPoint&))); 
    
    void MainWindow::showContextMenu(const QPoint& pos)
    {
    
      auto contextMenu = new QMenu(ui->tree);
      contextMenu->addAction("Uninstall TA", this, SLOT(uninstallAppletClickedSlot()));
    
      QModelIndex index = ui->tree->indexAt(pos);
      if (index.isValid() && index.row() % 2 == 0) {
        contextMenu->exec(ui->tree->viewport()->mapToGlobal(pos));
      }
    } 
    

    But i get nothing.
    Ideas?

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    • mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by mrjj
      #2

      Hi
      well its either index that is not valid or (index.row() % 2 == 0) is not true

      rest of code looks good.

      try

       if ( true /*index.isValid() && index.row() % 2 == 0*/) {
          contextMenu->exec(ui->tree->viewport()->mapToGlobal(pos));
        }
      

      and see if it pops.

      also. you create a new menu each time. You could move it as a member to avoid this.

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      • D Offline
        D Offline
        developer_61
        wrote on last edited by developer_61
        #3

        @mrjj i tried the debugger, i don't even get into the function.

        mrjjM 1 Reply Last reply
        0
        • D developer_61

          @mrjj i tried the debugger, i don't even get into the function.

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #4

          @developer_61

          ok?
          Did you check that connect returns true ?

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          0
          • D Offline
            D Offline
            developer_61
            wrote on last edited by
            #5

            @mrjj right problem solved. I got true now. Problem was with the syntax. Thank You.

            mrjjM 1 Reply Last reply
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            • D developer_61

              @mrjj right problem solved. I got true now. Problem was with the syntax. Thank You.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #6

              @developer_61

              Super.
              Can you tell what it was for me as i didnt spot it :(

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              • M Offline
                M Offline
                ManjunathXI
                wrote on last edited by
                #7

                Hi,
                First enable custom context menu by using below code and connect the slot

                ui->treeView->setContextMenuPolicy( Qt::CustomContextMenu );
                connect(ui->treeView, SIGNAL(customContextMenuRequested(QPoint)),this,SLOT(ShowContextMenuMessage(QPoint)));

                In slot create menu and pop up the menu in mouse position like this

                void Mainwindow::ShowContextMenuMessage(QPoint p)
                {
                QMenu *menu = new QMenu("menu",ui->treeView_Messages);
                menu->addAction(QIcon(":/new/prefix1/Icons/add.ico"),"Add Tag",this,SLOT(addNewTag()));
                menu->popup(QCursor::pos());
                menu->exec();
                }

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                • D Offline
                  D Offline
                  developer_61
                  wrote on last edited by developer_61
                  #8

                  @mrjj sure :). I spot that there is another syntax for the connect function with &.
                  i use:

                  connect(ui->tree,&QWidget::customContextMenuRequested ,this, &MainWindow::showContextMenu);
                  

                  and it works fine.
                  I think you would spot it easy if you would see the whole code.

                  @ManjunathXI thank you already solved!

                  1 Reply Last reply
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